systemslibrarian/classical-cipher-corpus · Datasets at Hugging Face

id stringlengths 7 52	text stringlengths 6 2.11k	ciphertext stringlengths 6 2.11k	plaintext stringlengths 6 282	label stringclasses 81 values	cipher stringclasses 81 values	cipher_family stringclasses 13 values	key unknown	difficulty stringclasses 7 values	language stringclasses 8 values	text_length int64 6 1.09k	length int64 6 1.28k	source stringclasses 2 values	dataset_version stringclasses 2 values	split stringclasses 1 value	attack_methods listlengths 0 3 ⌀	educational_note stringclasses 32 values
cda-0012371	XIFPLHZQONSSKSPHLJODVHDUKCUTROMRHSRASDJFEAGXDUAPEQVEDHMIJXSGLFHJUKFXFHFOERPBJMJKSLZKAYQENVJQRWLUKVIULTFTPLEZBNRSYPVOCKPWZFRAOKOEPDJVQGKPPXO	XIFPLHZQONSSKSPHLJODVHDUKCUTROMRHSRASDJFEAGXDUAPEQVEDHMIJXSGLFHJUKFXFHFOERPBJMJKSLZKAYQENVJQRWLUKVIULTFTPLEZBNRSYPVOCKPWZFRAOKOEPDJVQGKPPXO	DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE ATBASH ENCODES BY REVERSING THE ALPHABET TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION	one_time_pad	one_time_pad	null	{}	hard	en	139	139	synthetic_educational	null	null	[ "information_theoretic_proof", "key_reuse_attack" ]	One-time pad: theoretically unbreakable if key is truly random and never reused.
cda-0015703	AAABA BAAAA BABBA ABBBA BAABA ABBAB AABBA BAAAA AAAAA ABBBA AABBB BABBA BAAAA AABAA BABAA AAAAA BAAAA AAABB BAAAB ABBBA AAAAA BAABA ABAAA AABAA ABBAA AAABA AABAA AAAAA ABBAA AAABB AAABA AAAAA BAAAA AABAA AABAB BAABB ABABA BAABA AABBB ABAAA ABBAA ABAAB ABAAA ABBAA AABBA BAAAB BAABB AAAAB BAAAB BAABA ABAAA BAABA BAABB BA...	AAABA BAAAA BABBA ABBBA BAABA ABBAB AABBA BAAAA AAAAA ABBBA AABBB BABBA BAAAA AABAA BABAA AAAAA BAAAA AAABB BAAAB ABBBA AAAAA BAABA ABAAA AABAA ABBAA AAABA AABAA AAAAA ABBAA AAABB AAABA AAAAA BAAAA AABAA AABAB BAABB ABABA BAABA AABBB ABAAA ABBAA ABAAB ABAAA ABBAA AABBA BAAAB BAABB AAAAB BAAAB BAABA ABAAA BAABA BAABB BA...	CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER	bacon_cipher	bacon_cipher	null	{}	hard	en	475	475	synthetic_educational	null	null	[ "five_bit_decode", "ab_frequency_analysis" ]	Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.
straddling-checkerboard-v3-0155	67438392252217323825232214976230037474332294225388761213720224366897323020362694222023342368973230238	67438392252217323825232214976230037474332294225388761213720224366897323020362694222023342368973230238	TWO ROADS DIVERGED IN A YELLOW WOOD AND SORRY I COULD NOT TRAVEL BOTH AND BE ONE TRAVELER	straddling_checkerboard	straddling_checkerboard	substitution	{ "type": "top_row", "value": "LIONSTRACE" }	advanced	en	101	101	cipher_museum	2.0	public	null	null
chaocipher-v3-0027	DVOMYUGHFTCSIJBKQKED	DVOMYUGHFTCSIJBKQKED	THE COMPASS POINTS TRUE	chaocipher	chaocipher	machine	{ "type": "keyword", "value": "PALACE" }	advanced	en	20	20	cipher_museum	2.0	public	null	null
m209-v3-0049	WLFBJGANTWXLCPSBBDEVRCOJUQFQZJXZBTOCSJIBMXKMLWTUOXKYWMKXXQDZLPKMKWACYJG	WLFBJGANTWXLCPSBBDEVRCOJUQFQZJXZBTOCSJIBMXKMLWTUOXKYWMKXXQDZLPKMKWACYJG	IT WAS A BRIGHT COLD DAY IN APRIL AND THE CLOCKS WERE STRIKING THIRTEEN ACROSS THE CITY	m209	m209	machine	{ "type": "seed", "value": "ARMY" }	expert	en	71	71	cipher_museum	2.0	public	null	null
autokey-v2-0350	WIMMSXPEERCJHRGXRYXHUCEPZTVMJYEQIEALZEDPYMLDIBAWYMAYLIPJGDLLHYHZYJACGEPWDPPDQW	WIMMSXPEERCJHRGXRYXHUCEPZTVMJYEQIEALZEDPYMLDIBAWYMAYLIPJGDLLHYHZYJACGEPWDPPDQW	LA LIBERTE GUIDANT LE PEUPLE VERS UN AVENIR MEILLEUR ET PLUS JUSTE POUR TOUS LES HOMMES LIBRES	autokey	autokey	polyalphabetic	{ "type": "keyword", "value": "LIBERTY" }	intermediate	en	78	78	cipher_museum	2.0	public	null	null
cda-0007843	DP PRX HUUNDCP AOTJITSMCJJ TGSH FPFVDVAQXX	DP PRX HUUNDCP AOTJITSMCJJ TGSH FPFVDVAQXX	DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION	trithemius	trithemius	null	{}	medium	en	37	37	synthetic_educational	null	null	[]
m209-158	KVALYOQLJKPYQEZYFJVUEJBCYZOXNYBJSEZFDYVYMDLYB	KVALYOQLJKPYQEZYFJVUEJBCYZOXNYBJSEZFDYVYMDLYB	THE REPORTS OF MY DEATH HAVE BEEN GREATLY EXAGGERATED	m209	m209	machine	{ "type": "seed", "value": "SECRET" }	expert	en	45	45	cipher_museum	0.2	public	null	null
lorenz-v3-0370	MARCGTOVICTORY	MARCGTOVICTORY	MARCH TO VICTORY	lorenz	lorenz	machine	{ "type": "seed", "value": "STURGEON" }	expert	en	14	14	cipher_museum	2.0	public	null	null
cda-0011999	44 23 15 11 42 13 23 24 44 15 13 44 45 42 15 43 23 34 45 31 14 32 11 25 15 32 24 43 45 43 15 23 11 42 14 15 42 21 42 15 41 45 15 33 13 54 11 33 11 31 54 43 24 43 13 11 33 42 15 51 15 11 31 52 15 11 25 13 24 35 23 15 42 43 12 15 11 45 21 34 42 44 24 43 44 23 15 42 15 13 24 35 42 34 13 11 31 34 21 51 24 22 15 33 15 42 15...	44 23 15 11 42 13 23 24 44 15 13 44 45 42 15 43 23 34 45 31 14 32 11 25 15 32 24 43 45 43 15 23 11 42 14 15 42 21 42 15 41 45 15 33 13 54 11 33 11 31 54 43 24 43 13 11 33 42 15 51 15 11 31 52 15 11 25 13 24 35 23 15 42 43 12 15 11 45 21 34 42 44 24 43 44 23 15 42 15 13 24 35 42 34 13 11 31 34 21 51 24 22 15 33 15 42 15...	THE ARCHITECTURE SHOULD MAKE MISUSE HARDER FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF	polybius	polybius	null	{}	hard	en	124	124	synthetic_educational	null	null	[ "pair_decode", "frequency_analysis" ]	Polybius square: 5×5 grid maps letters to two-digit row-column pairs.
monoalphabetic-072	PDNBEQ GEY PBCLAEH	PDNBEQ GEY PBCLAEH	CIPHER KEY CHANGED	monoalphabetic	monoalphabetic	substitution	{ "type": "keyword", "value": "CIPHER" }	beginner	en	16	18	cipher_museum	0.2	public	null	null
jefferson-disk-016	EZBMVIJXWEVVUYQTSA	EZBMVIJXWEVVUYQTSA	SEND REINFORCEMENTS	jefferson_disk	jefferson_disk	disk	{ "type": "disk_order", "value": "3,1,5,2,4,6" }	expert	en	18	18	cipher_museum	0.2	public	null	null
fractionated-morse-v3-0088	HSSJADDTVVDPUCDHWTVSVSBFFUHTJAVLCDFCVOVNIDJIOKXMWDJBEDPVNLJJLJFUFDLDAUJQESDFAVJPDQFJLJKUPOTFEXPDFFJ	HSSJADDTVVDPUCDHWTVSVSBFFUHTJAVLCDFCVOVNIDJIOKXMWDJBEDPVNLJJLJFUFDLDAUJQESDFAVJPDQFJLJKUPOTFEXPDFFJ	DIFFIE AND HELLMAN INVENTED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX CHANGING EVERYTHING	fractionated_morse	fractionated_morse	fractionation	{ "type": "keyword", "value": "PALACE" }	advanced	en	99	99	cipher_museum	2.0	public	null	null
fractionated-morse-v3-0322	OATANEOATANPEMFXDT	OATANEOATANPEMFXDT	PER ASPERA AD ASTRA	fractionated_morse	fractionated_morse	fractionation	{ "type": "keyword", "value": "FREEDOM" }	advanced	en	18	18	cipher_museum	2.0	public	null	null
polybius-v2-0085	44 23 15 25 11 43 24 43 25 24 44 15 43 44 21 24 33 14 43 42 15 35 15 11 44 15 14 43 15 41 45 15 33 13 15 43 44 34 14 15 44 15 42 32 24 33 15 44 23 15 25 15 54 31 15 33 22 44 23 34 21 11 51 24 22 15 33 15 42 15 13 24 35 23 15 42 25 15 54	44 23 15 25 11 43 24 43 25 24 44 15 43 44 21 24 33 14 43 42 15 35 15 11 44 15 14 43 15 41 45 15 33 13 15 43 44 34 14 15 44 15 42 32 24 33 15 44 23 15 25 15 54 31 15 33 22 44 23 34 21 11 51 24 22 15 33 15 42 15 13 24 35 23 15 42 25 15 54	THE KASISKI TEST FINDS REPEATED SEQUENCES TO DETERMINE THE KEY LENGTH OF A VIGENERE CIPHER KEY	polybius	polybius	substitution	{ "type": "none", "value": null }	beginner	en	158	236	cipher_museum	2.0	public	null	null
hill-205	KOPYTOSMEAZBBIEF	KOPYTOSMEAZBBIEF	SILENCE IS GOLDEN	hill	hill	polygraphic	{ "a": 5, "b": 3, "c": 2, "d": 7 }	advanced	en	16	16	cipher_museum	0.2	public	null	null
affine-v2-1150	FHGBO LN OBKOBJK	FHGBO LN OBKOBJK	COVER MY RETREAT	affine	affine	substitution	{ "a": 11, "b": 9 }	beginner	en	14	16	cipher_museum	2.0	public	null	null
adfgx-v3-0443	DXAXAGAGDDGXXAXXGDFXGGFFAGFFXFXAGGXFXAGXXGDDXFXDDGXDGAFDDGAAFGFDXGXGFFFGXXAADAGXAAXAXXDXFXXXDFAFDXGAFFDAAXFFGXDGGDAGDDAXFXADDDDXFDDDXADXGGDGAGGFDGDDAX	DXAXAGAGDDGXXAXXGDFXGGFFAGFFXFXAGGXFXAGXXGDDXFXDDGXDGAFDDGAAFGFDXGXGFFFGXXAADAGXAAXAXXDXFXXXDFAFDXGAFFDAAXFFGXDGGDAGDDAXFXADDDDXFDDDXADXGGDGAGGFDGDDAX	THE BATTLE OF GETTYSBURG LASTED THREE DAYS AND COST OVER FIFTY THOUSAND CASUALTIES TOTAL	adfgx	adfgx	fractionation	{ "polybius": "WISDOM", "columnar": "COURAGE" }	advanced	en	150	150	cipher_museum	2.0	public	null	null
vernam-v3-0006	TIGJEYKZPXVORVFB	TIGJEYKZPXVORVFB	THE GATES HOLD FIRM	vernam	vernam	stream	{ "type": "pad", "value": "ABCDEFGH (repeating)" }	expert	en	16	16	cipher_museum	2.0	public	null	null
sigaba-156	GIIZJWFVZMGZZLVESSNIVGSXTZSPJKOKEPSNXCXCCQVWKSUNDNE	GIIZJWFVZMGZZLVESSNIVGSXTZSPJKOKEPSNXCXCCQVWKSUNDNE	ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS	sigaba	sigaba	machine	{ "type": "seed", "value": "SECRET" }	expert	en	51	51	cipher_museum	0.2	public	null	null
double-transposition-v3-0256	PLTEOEDWARLHLMIELDOECYAWHCCMOAAREOEIIGEANNGAISHYIRBMTNEUMSSOIHVSLNSLUAUEEOSLGTNEEHTODOA	PLTEOEDWARLHLMIELDOECYAWHCCMOAAREOEIIGEANNGAISHYIRBMTNEUMSSOIHVSLNSLUAUEEOSLGTNEEHTODOA	CALL ME ISHMAEL SOME YEARS AGO NEVER MIND HOW LONG PRECISELY I THOUGHT I WOULD SAIL ABOUT AND SEE THE OCEAN	double_transposition	double_transposition	transposition	{ "key1": "TRIUMPH", "key2": "JUSTICE" }	advanced	en	87	87	cipher_museum	2.0	public	null	null
stager-route-v3-0065	TOUTAEOUTAAURNHRFHEGGRDFSLLXTAICELEBATAEOFNIXXEDTSDSTTTYTATYCSXXTATOYESLEBDSVHSOX	TOUTAEOUTAAURNHRFHEGGRDFSLLXTAICELEBATAEOFNIXXEDTSDSTTTYTATYCSXXTATOYESLEBDSVHSOX	THE BATTLE OF GETTYSBURG LASTED THREE DAYS AND COST OVER FIFTY THOUSAND CASUALTIES TOTAL	stager_route	stager_route	transposition	{ "type": "integer", "value": 9 }	expert	en	81	81	cipher_museum	2.0	public	null	null
cardano-autokey-v2-0262	SSZLJKHHWLKFMCHDTWDWJ	SSZLJKHHWLKFMCHDTWDWJ	BRIDGE DESTROYED AT DAWN	cardano_autokey	cardano_autokey	polyalphabetic	{ "type": "keyword", "value": "ROME" }	advanced	en	21	21	cipher_museum	2.0	public	null	null
enigma-v3-0028	NEFOJULZZCCRLFVQVTAAAQCQXXU	NEFOJULZZCCRLFVQVTAAAQCQXXU	DONT FIRE TILL YOU SEE THE WHITES	enigma	enigma	machine	{ "type": "rotor_start", "value": "ABC" }	expert	en	27	27	cipher_museum	2.0	public	null	null
cda-0020561	.... .... .. ... . ..... .... .... .... .. .. .... .... .... .. ... . ..... ... .. .. .... .... ..... .... ... . ... .. .... ... ..... .. ... . ..... .... .. . . . .... ..... . . . ... ... . ... . ..... .... ... .... .... .. ... . ..... . . ... . ... ..... .. ... . . . .. . ..... .....	.... .... .. ... . ..... .... .... .... .. .. .... .... .... .. ... . ..... ... .. .. .... .... ..... .... ... . ... .. .... ... ..... .. ... . ..... .... .. . . . .... ..... . . . ... ... . ... . ..... .... ... .... .... .. ... . ..... . . ... . ... ..... .. ... . . . .. . ..... .....	THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY	tap_code	tap_code	null	{}	hard	en	114	114	synthetic_educational	null	null	[ "dot_count_decode", "grid_position_search" ]	Tap code: letters encoded as dot-groups representing row and column in 5×5 grid.
chaocipher-v2-0147	IEKAMSKVDKZ	IEKAMSKVDKZ	KNOW THYSELF	chaocipher	chaocipher	machine	{ "type": "keyword", "value": "LIBERTY" }	advanced	en	11	11	cipher_museum	2.0	public	null	null
adfgx-v2-0519	DXDDGGDFDXGGGDGDADGFDGGFAFFXAXXADFGXGGDXFAGFGFAAXAADDGGFDDFDFDADXAXGGDFAFGDXGXAGAAAGGGDXDGDGFXXXADGXDXAXDXAAGDAADAFDXGGFXDGDGADAAAXFGAXAAFADAGFDXAXXFDXGGAXGDG	DXDDGGDFDXGGGDGDADGFDGGFAFFXAXXADFGXGGDXFAGFGFAAXAADDGGFDDFDFDADXAXGGDFAFGDXGXAGAAAGGGDXDGDGFXXXADGXDXAXDXAAGDAADAFDXGGFXDGDGADAAAXFGAXAAFADAGFDXAXXFDXGGAXGDG	RICHMOND HAS FALLEN OUR FORCES HAVE ENTERED THE CITY RESISTANCE IS ENDED INFORM THE PRESIDENT	adfgx	adfgx	fractionation	{ "polybius": "WISDOM", "columnar": "COURAGE" }	advanced	en	158	158	cipher_museum	2.0	public	null	null
slidex-v2-0170	LVJACPMDKZSNFENXDZVXIYFFUWOCGRHDCUSTSSXZHMMRIQLPGOAIUHIJHDCUTLQRRXDO	LVJACPMDKZSNFENXDZVXIYFFUWOCGRHDCUSTSSXZHMMRIQLPGOAIUHIJHDCUTLQRRXDO	COWARDS DIE MANY TIMES BEFORE THEIR DEATHS THE VALIANT NEVER TASTE DEATH BUT ONCE	slidex	slidex	transposition	{ "type": "keyword", "value": "LIBERTY" }	advanced	en	68	68	cipher_museum	2.0	public	null	null
solitaire-v2-0090	EUXQHMBWJEWEZCAALBXQBHVYTNOGLDIPYACLTUIFSSRXTJNUYGOTCTIXIAMYPQQRJUKGQXRZKTPW	EUXQHMBWJEWEZCAALBXQBHVYTNOGLDIPYACLTUIFSSRXTJNUYGOTCTIXIAMYPQQRJUKGQXRZKTPW	MARY QUEEN OF SCOTS WAS BEHEADED AFTER HER CIPHER LETTERS WERE DECODED BY THOMAS PHELIPPES	solitaire	solitaire	stream	{ "type": "none", "value": null }	expert	en	76	76	cipher_museum	2.0	public	null	null
cda-0012628	among swift clear yield troop alert lines enemy inner swift along range often draft under swift early draft basis years seeks phase again route turns	among swift clear yield troop alert lines enemy inner swift along range often draft under swift early draft basis years seeks phase again route turns	A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE	null_cipher	null_cipher	null	{}	hard	en	125	125	synthetic_educational	null	null	[ "acrostic_detection", "first_letter_extraction" ]	Null/steganographic cipher: hidden message formed by first letters of words.
bifid-v2-0155	RFOATBOSHOFEZNFVLVCAIB	RFOATBOSHOFEZNFVLVCAIB	FLEET ASSEMBLES AT HARBOR	bifid	bifid	fractionation	{ "type": "keyword", "value": "FORTRESS" }	advanced	en	22	22	cipher_museum	2.0	public	null	null
vernam-v2-0033	AOPXMYIVMYDTE	AOPXMYIVMYDTE	ANNUIT COEPTIS	vernam	vernam	stream	{ "type": "pad", "value": "ABCDEFGH (repeating)" }	expert	en	13	13	cipher_museum	2.0	public	null	null
vigenere-v3-0838	YYIKDHQXYSPGTUWD	YYIKDHQXYSPGTUWD	THE GATES HOLD FIRM	vigenere	vigenere	polyalphabetic	{ "type": "keyword", "value": "FREEDOM" }	intermediate	en	16	16	cipher_museum	2.0	public	null	null
four-square-v2-0243	ODIFRNUHQAOSKIRN	ODIFRNUHQAOSKIRN	THE HARBOR IS CLEAR	four_square	four_square	polygraphic	{ "key1": "TRIUMPH", "key2": "JUSTICE" }	advanced	en	16	16	cipher_museum	2.0	public	null	null
adfgvx-v3-0398	FDGDAFDADXAFADVAFDFFGDFGAAXAXDVDAGFDDGAGXFDDFDVAVGFDXGDGFDDAFDVADDVFAXADGFADAFAADXGAGFFVGXFADXADVXDXGDAXDADDGVDXAVAAAFADAFGADDGFGFAFAFAFFAVADFFGFDDGFDXDDDFADA	FDGDAFDADXAFADVAFDFFGDFGAAXAXDVDAGFDDGAGXFDDFDVAVGFDXGDGFDDAFDVADDVFAXADGFADAFAADXGAGFFVGXFADXADVXDXGDAXDADDGVDXAVAAAFADAFGADDGFGFAFAFAFFAVADFFGFDDGFDXDDDFADA	ALL PERSONS BORN OR NATURALIZED IN THE UNITED STATES ARE CITIZENS SUBJECT TO EQUAL PROTECTION	adfgvx	adfgvx	fractionation	{ "polybius": "DRAGON", "columnar": "THUNDER" }	advanced	en	158	158	cipher_museum	2.0	public	null	null
playfair-v3-0395	OPKYKTIQICKFCR	OPKYKTIQICKFCR	FULL SAIL AHEAD	playfair	playfair	polygraphic	{ "type": "keyword", "value": "FREEDOM" }	intermediate	en	14	14	cipher_museum	2.0	public	null	null
cda-0006985	HJSB QUCJ JQLT VASC ZPIA XNNU HUZA SHAP GINB BUHI JLFD ARIY MJDA MAXL FRZM ECTU NSSE JDLB LCEY PVCK AAOR RBLP XUDS UBVT LARQ BYEK UWGW IEZY FPEC PVAH GGHO PWQW	HJSB QUCJ JQLT VASC ZPIA XNNU HUZA SHAP GINB BUHI JLFD ARIY MJDA MAXL FRZM ECTU NSSE JDLB LCEY PVCK AAOR RBLP XUDS UBVT LARQ BYEK UWGW IEZY FPEC PVAH GGHO PWQW	CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY	beaufort	beaufort	null	{ "key": "JUSTICE" }	hard	en	128	128	synthetic_educational	null	null	[]
cda-0019580	6294 02608 01620 01915 05701 02891 1571 01334 4122 0332 04419 06309 01578 05986 06372 06677 05985 01648 06016 6292 02596 01581 2830 4446 1309 1596 7609 4802 1944 00946 04726 2912 04405 0970 02831 1282 01630 04449 1023 01572 06310 04768 01631 06011 06372 02921 04102 0366 6283 1607 03456 01636 07919 3773 1619 4488 02241 ...	6294 02608 01620 01915 05701 02891 1571 01334 4122 0332 04419 06309 01578 05986 06372 06677 05985 01648 06016 6292 02596 01581 2830 4446 1309 1596 7609 4802 1944 00946 04726 2912 04405 0970 02831 1282 01630 04449 1023 01572 06310 04768 01631 06011 06372 02921 04102 0366 6283 1607 03456 01636 07919 3773 1619 4488 02241 ...	THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE	zimmermann	zimmermann	null	{}	hard	en	221	221	synthetic_educational	null	null	[ "codebook_frequency", "number_group_analysis" ]	Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.
atbash-v2-0100	OZ ERWZ VH HFVML B OLH HFVMLH HFVMLH HLM KZIZ GLWLH OLH JFV EREVM YZQL VO XRVOL VGVIML	OZ ERWZ VH HFVML B OLH HFVMLH HFVMLH HLM KZIZ GLWLH OLH JFV EREVM YZQL VO XRVOL VGVIML	LA VIDA ES SUENO Y LOS SUENOS SUENOS SON PARA TODOS LOS QUE VIVEN BAJO EL CIELO ETERNO	atbash	atbash	substitution	{ "type": "none", "value": null }	beginner	en	69	86	cipher_museum	2.0	public	null	null
lorenz-v2-0118	THEGREATCIPHEROFLOUISXIVMNVENTEDAYANTKINEANDBONAVENTUVEROSSIGNOLUSEDANOMENCKATOROFKVERFIREHUNDREDNUMBERSREPRESEJTINGSYKLABLESWORDSANDNULLSAJHREMAINEDUNBROKENFORTXOCENTURMES	THEGREATCIPHEROFLOUISXIVMNVENTEDAYANTKINEANDBONAVENTUVEROSSIGNOLUSEDANOMENCKATOROFKVERFIREHUNDREDNUMBERSREPRESEJTINGSYKLABLESWORDSANDNULLSAJHREMAINEDUNBROKENFORTXOCENTURMES	THE GREAT CIPHER OF LOUIS XIV INVENTED BY ANTOINE AND BONAVENTURE ROSSIGNOL USED A NOMENCLATOR OF OVER FIVE HUNDRED NUMBERS REPRESENTING SYLLABLES WORDS AND NULLS AND REMAINED UNBROKEN FOR TWO CENTURIES	lorenz	lorenz	machine	{ "type": "seed", "value": "TUNNY" }	expert	en	172	172	cipher_museum	2.0	public	null	null
straddling-checkerboard-v2-0264	29833856199529702883252221	29833856199529702883252221	MISSION ACCOMPLISHED	straddling_checkerboard	straddling_checkerboard	substitution	{ "type": "top_row", "value": "RASTONICEL" }	advanced	en	26	26	cipher_museum	2.0	public	null	null
venona-pad-reuse-125	BDGTKTAXKDGYWET	BDGTKTAXKDGYWET	THE COAST IS CLEAR	venona_pad_reuse	venona_pad_reuse	stream	{ "type": "keyword", "value": "SECRET" }	expert	en	15	15	cipher_museum	0.2	public	null	null
adfgvx-084	XDVGGFAFGGAGFDAVVGFF	XDVGGFAFGGAGFDAVVGFF	TRUST NO ONE	adfgvx	adfgvx	fractionation	{ "polybius": "CIPHER", "columnar": "MUSEUM" }	advanced	en	20	20	cipher_museum	0.2	public	null	null
venona-pad-reuse-143	BDG3M6UMQSATR	BDG3M6UMQSATR	THE KING IS DEAD	venona_pad_reuse	venona_pad_reuse	stream	{ "type": "keyword", "value": "SECRET" }	expert	en	13	13	cipher_museum	0.2	public	null	null
cda-0018947	JIWZ AMND KIGA YCKG AOTJ TLKC UQUX YJXR DZRO JOSW PLTY BQQZ JJZM XSTI SFTG PXQA QCUU GWXB IMGY RKEB URSB IJJH ASCM MMDS NCGT CLZJ MNCY JUST KEJG RSUZ XCGB FTFX PUZB AEFN IUHO XWSQ XLGM YNHL B	JIWZ AMND KIGA YCKG AOTJ TLKC UQUX YJXR DZRO JOSW PLTY BQQZ JJZM XSTI SFTG PXQA QCUU GWXB IMGY RKEB URSB IJJH ASCM MMDS NCGT CLZJ MNCY JUST KEJG RSUZ XCGB FTFX PUZB AEFN IUHO XWSQ XLGM YNHL B	THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY	one_time_pad	one_time_pad	null	{}	hard	en	153	153	synthetic_educational	null	null	[ "information_theoretic_proof", "key_reuse_attack" ]	One-time pad: theoretically unbreakable if key is truly random and never reused.
kryptos-v3-0078	DYMQJTJXBIBTWOFAETNZKHEREZONNTZRMZXCEIZLCFEATZCEECEYJBDPKWLTIZEILTIZVPBMHOVN	DYMQJTJXBIBTWOFAETNZKHEREZONNTZRMZXCEIZLCFEATZCEECEYJBDPKWLTIZEILTIZVPBMHOVN	THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC	kryptos	kryptos	polyalphabetic	{ "type": "keyword", "value": "SHADOW" }	advanced	en	76	76	cipher_museum	2.0	public	null	null
cda-0015094	LBQSQ QTPTC FGWEJ HUGMX IGHNM LSIGV VPUKM EH	LBQSQ QTPTC FGWEJ HUGMX IGHNM LSIGV VPUKM EH	DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION	running_key	running_key	null	{}	medium	en	37	37	synthetic_educational	null	null	[ "index_of_coincidence", "probable_plaintext" ]	Running-key cipher: Vigenère with a very long key (e.g. a book passage).
cda-0013381	ZLLQJ DWCNP GMKSV XUEIQ GTLOW KMNCW JCTBD BQBAX RGEPM SMXBU CPWKA WBKEN IFIMC QLNKD YRUJF WNCIZ ABGTV JCCGN OFBTW CZUCI SVCXK UNWVV DJZMF BKHWQ QXHMV SO	ZLLQJ DWCNP GMKSV XUEIQ GTLOW KMNCW JCTBD BQBAX RGEPM SMXBU CPWKA WBKEN IFIMC QLNKD YRUJF WNCIZ ABGTV JCCGN OFBTW CZUCI SVCXK UNWVV DJZMF BKHWQ QXHMV SO	PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS	one_time_pad	one_time_pad	null	{}	hard	en	127	127	synthetic_educational	null	null	[ "information_theoretic_proof", "key_reuse_attack" ]	One-time pad: theoretically unbreakable if key is truly random and never reused.
cda-0020456	.. . . . .. .... ... . . ... ... . ... .... .... ... . ..... . .... .. .... .... ... . . ... ..... ... .... .... ... .... .... .... ..... .... .. . ..... ... ... ... .... .... .... . . .... ... ... . ... .... .. .. . . ... ...	.. . . . .. .... ... . . ... ... . ... .... .... ... . ..... . .... .. .... .... ... . . ... ..... ... .... .... ... .... .... .... ..... .... .. . ..... ... ... ... .... .... .... . . .... ... ... . ... .... .. .. . . ... ...	FAIL CLOSED IS A POSTURE NOT A SLOGAN	tap_code	tap_code	null	{}	medium	en	30	30	synthetic_educational	null	null	[ "dot_count_decode", "grid_position_search" ]	Tap code: letters encoded as dot-groups representing row and column in 5×5 grid.
hill-103	AJIQGSKWCREACJHHJCDZSEXSELHQHWRKZAFZMIELHQXMXSQN	AJIQGSKWCREACJHHJCDZSEXSELHQHWRKZAFZMIELHQXMXSQN	THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG NEAR THE RIVER	hill	hill	polygraphic	{ "a": 3, "b": 3, "c": 2, "d": 7 }	advanced	en	48	48	cipher_museum	0.2	public	null	null
copiale-v2-0021	K6 V4 C3 I4 G6 N6 I3 N3 R1 N2 M6	K6 V4 C3 I4 G6 N6 I3 N3 R1 N2 M6	KNOW THYSELF	copiale	copiale	substitution	{ "type": "keyword", "value": "MASONIC" }	advanced	en	22	32	cipher_museum	2.0	public	null	null
confederate-vigenere-268	WJUVBEKRLVYUHWV	WJUVBEKRLVYUHWV	EVACUATE THE BASE	confederate_vigenere	confederate_vigenere	polyalphabetic	{ "type": "keyword", "value": "SOUTHERN" }	intermediate	en	15	15	cipher_museum	0.2	public	null	null
m209-272	PZIAKVQJZLNHPIENJMARZRHFXBNYYUKSBRSQXDRYJLCTB	PZIAKVQJZLNHPIENJMARZRHFXBNYYUKSBRSQXDRYJLCTB	NEVER INTERRUPT YOUR ENEMY WHEN HE IS MAKING A MISTAKE	m209	m209	machine	{ "type": "seed", "value": "ENIGMA" }	expert	en	45	45	cipher_museum	0.2	public	null	null
bazeries-019	JIMKNCIJMYPNEFIY	JIMKNCIJMYPNEFIY	NO PRISONERS TAKEN	bazeries	bazeries	transposition	{ "type": "integer", "value": 42 }	advanced	en	16	16	cipher_museum	0.2	public	null	null
affine-v3-1084	BDK XCSLUCY CXXSFKM	BDK XCSLUCY CXXSFKM	THE RAILWAY ARRIVES	affine	affine	substitution	{ "a": 15, "b": 2 }	beginner	en	17	19	cipher_museum	2.0	public	null	null
enigma-v2-0538	EIWOXDFCPNHEAMDEX	EIWOXDFCPNHEAMDEX	NOVUS ORDO SECLORUM	enigma	enigma	machine	{ "type": "rotor_start", "value": "MNO" }	expert	en	17	17	cipher_museum	2.0	public	null	null
two-square-v3-0103	THBTRLCSEDECREBT	THBTRLCSEDECREBT	THE SENATE DECREES	two_square	two_square	polygraphic	{ "key1": "LIBERTY", "key2": "FREEDOM" }	advanced	en	16	16	cipher_museum	2.0	public	null	null
red-type-a-v3-0035	DRIOXHLATUJNC	DRIOXHLATUJNC	THE APPLE FALLS	red_type_a	red_type_a	machine	{ "type": "keyword", "value": "SAKURA" }	advanced	en	13	13	cipher_museum	2.0	public	null	null
cda-0005143	SPPZGOQLBHHUMD ILQLFXV VWF SXMXJVOF EMVKBFFZ VIMGZV	SPPZGOQLBHHUMD ILQLFXV VWF SXMXJVOF EMVKBFFZ VIMGZV	POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS	gronsfeld	gronsfeld	null	{ "key": "31416" }	medium	en	46	46	synthetic_educational	null	null	[ "kasiski_examination", "digit_key_brute_force" ]	Gronsfeld: Vigenère variant with a digit-only key (0–9 per position).
diana-019	QULWSLUNJJLPADWQ	QULWSLUNJJLPADWQ	NO PRISONERS TAKEN	diana	diana	polyalphabetic	{ "type": "keyword", "value": "DIANA" }	intermediate	en	16	16	cipher_museum	0.2	public	null	null
vic-v2-0309	7009287159189488803381588813911838775381470068988187591787817947158292458434884813491824888684183848088868678781878894	7009287159189488803381588813911838775381470068988187591787817947158292458434884813491824888684183848088868678781878894	ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW	vic	vic	substitution	{ "type": "keyword", "value": "LIBERTY" }	advanced	en	118	118	cipher_museum	2.0	public	null	null
cda-0007132	DPNX ROBT WWBO USTT JVLT OSGD ITDQ OZNO ULSL FARW EFTW MFMK EWBS ASWF TGUA FTMQ TXMG GLFG QUYI FERR NVPL YZ	DPNX ROBT WWBO USTT JVLT OSGD ITDQ OZNO ULSL FARW EFTW MFMK EWBS ASWF TGUA FTMQ TXMG GLFG QUYI FERR NVPL YZ	COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY	gronsfeld	gronsfeld	null	{ "key": "11235" }	hard	en	86	86	synthetic_educational	null	null	[]
cda-0016108	XLNFQ IKSAC EOSCH APVWF YHHVI GRECU COMNC AZEOO FMQYV MGCFL DWBJW HTTBE ZVLTX TEDWH QSWPY ENKRX ODVVA PJGJN HCENY TBUKD YVVAN SFNWK CZR	XLNFQ IKSAC EOSCH APVWF YHHVI GRECU COMNC AZEOO FMQYV MGCFL DWBJW HTTBE ZVLTX TEDWH QSWPY ENKRX ODVVA PJGJN HCENY TBUKD YVVAN SFNWK CZR	THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER CAREFULLY	vernam	vernam	null	{}	hard	en	113	113	synthetic_educational	null	null	[ "key_reuse_attack", "information_theoretic_proof" ]	Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP.
vigenere-fr-111	KTUHYKECAAMMGZCVXIGRPYHZP	KTUHYKECAAMMGZCVXIGRPYHZP	IL FAUT CULTIVER NOTRE JARDIN	vigenere	vigenere	polyalphabetic	{ "type": "keyword", "value": "CIPHER" }	intermediate	fr	25	25	cipher_museum	0.2	public	null	null
bifid-v3-0511	DCTXWNUNQNDDNDIEXT	DCTXWNUNQNDDNDIEXT	GRAVITY EXPLAINS ALL	bifid	bifid	fractionation	{ "type": "keyword", "value": "TRIUMPH" }	advanced	en	18	18	cipher_museum	2.0	public	null	null
cda-0008823	O ZARRZ QON QYOGFWNL BOGFSENG PGH VF QON OYEC PS KEABT	O ZARRZ QON QYOGFWNL BOGFSENG PGH VF QON OYEC PS KEABT	A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG	porta	porta	null	{ "key": "KEY" }	medium	en	44	44	synthetic_educational	null	null	[]
cda-0016146	77 69 11 82 80 29 82 29 52 80 43 65 66 50 69 29 50 61 29 69 66 20 80 69 55 82 29 20 43 57 82 66 66 82 80 76 80 82 72 59 82 29 52 43 50 29 11 82 73 69 76 52 69 50 29 52 50 11 82 29 52 82 77 82 68 61 59 80 82 61 57 82 66 66 82 80 76 80 82 72 59 82 29 52 43 11 50 61 66 80 50 20 59 66 50 69 29 76 80 82 72 59 82 29 52 43 68...	77 69 11 82 80 29 82 29 52 80 43 65 66 50 69 29 50 61 29 69 66 20 80 69 55 82 29 20 43 57 82 66 66 82 80 76 80 82 72 59 82 29 52 43 50 29 11 82 73 69 76 52 69 50 29 52 50 11 82 29 52 82 77 82 68 61 59 80 82 61 57 82 66 66 82 80 76 80 82 72 59 82 29 52 43 11 50 61 66 80 50 20 59 66 50 69 29 76 80 82 72 59 82 29 52 43 68...	MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES	wallis_cipher	wallis_cipher	null	{}	hard	en	182	182	synthetic_educational	null	null	[ "number_substitution_decode", "frequency_analysis" ]	Wallis cipher: each letter mapped to a unique two-digit number from a fixed table.
sigaba-v2-0191	DZAZBQKIGOOJNEQKHASLRTDEDVJWBCIUYMLDQCEXPQFGXSOJYEGYQMQYFCSVQKHOMSXBXCICAN	DZAZBQKIGOOJNEQKHASLRTDEDVJWBCIUYMLDQCEXPQFGXSOJYEGYQMQYFCSVQKHOMSXBXCICAN	I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION	sigaba	sigaba	machine	{ "type": "seed", "value": "ARMY" }	expert	en	74	74	cipher_museum	2.0	public	null	null
vigenere-v2-0242	YVVEFVVAXAPLYIHZJFUBJLSDQBFMNEFLMSDTBILZRSKHCMWVTKEBEKJWJBGTJXMJJGYXCISVJHYFVFWKNRVMYIKLNZCPRXWJXVVKVWLGWSKADCKGZZYXCISVJHYFVMFLMSGTKLKGKFZZYXWGZGEXJWXGWVZLEEEWXOBX	YVVEFVVAXAPLYIHZJFUBJLSDQBFMNEFLMSDTBILZRSKHCMWVTKEBEKJWJBGTJXMJJGYXCISVJHYFVFWKNRVMYIKLNZCPRXWJXVVKVWLGWSKADCKGZZYXCISVJHYFVMFLMSGTKLKGKFZZYXWGZGEXJWXGWVZLEEEWXOBX	THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME TO LIE DOWN IN GREEN PASTURES HE LEADETH ME BESIDE THE STILL WATERS HE RESTORETH MY SOUL HE LEADETH ME IN THE PATHS OF RIGHTEOUSNESS FOR HIS NAME SAKE	vigenere	vigenere	polyalphabetic	{ "type": "keyword", "value": "FORTRESS" }	intermediate	en	164	164	cipher_museum	2.0	public	null	null
vigenere-v2-0088	RLLUFIHHLNPSCPCOXISTSAVXWEZNGXXMPPCHPCSIGZTSAETJTCESGGGENYYLTNFSGHROCRGGILJOPGT	RLLUFIHHLNPSCPCOXISTSAVXWEZNGXXMPPCHPCSIGZTSAETJTCESGGGENYYLTNFSGHROCRGGILJOPGT	CLAUDE SHANNON PROVED THAT THE ONE TIME PAD ACHIEVES PERFECT SECRECY WHEN USED CORRECTLY ONCE	vigenere	vigenere	polyalphabetic	{ "type": "keyword", "value": "PALACE" }	intermediate	en	79	79	cipher_museum	2.0	public	null	null
kl7-v2-0254	KWIRPQYASTVDUVICUNDQVCU	KWIRPQYASTVDUVICUNDQVCU	CARTHAGE MUST BE DESTROYED	kl7	kl7	machine	{ "type": "seed", "value": "FREEDOM" }	expert	en	23	23	cipher_museum	2.0	public	null	null
cda-0005530	DVYAU FT JUTRPLVHVZA FPYTOKAZ IUSPXN MCUVOXRPV VDQINJSESANR KZMLV KARQYKXX QXAJRP JXDZNI QUQV TNA RXEZFLDVV MYPJT CKQEBTHXY KZPG L FTYJA GHSHAERU LQ IXN CUWEBLJGS BED LKP MHQJELP CLQ UWOQUY HHL EFF TEZKAP WLRXZXINN	DVYAU FT JUTRPLVHVZA FPYTOKAZ IUSPXN MCUVOXRPV VDQINJSESANR KZMLV KARQYKXX QXAJRP JXDZNI QUQV TNA RXEZFLDVV MYPJT CKQEBTHXY KZPG L FTYJA GHSHAERU LQ IXN CUWEBLJGS BED LKP MHQJELP CLQ UWOQUY HHL EFF TEZKAP WLRXZXINN	INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY THE MESSAGE WAS HIDDEN BUT NOT SECURE CAREFULLY	beaufort	beaufort	null	{ "key": "LIBERTY" }	hard	en	183	183	synthetic_educational	null	null	[ "kasiski_examination", "friedman_test", "index_of_coincidence" ]	Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption).
diana-v3-0550	QUVTPUQWYKABOKQDOERYMFHZTPUQW	QUVTPUQWYKABOKQDOERYMFHZTPUQW	TAXATION WITHOUT REPRESENTATION	diana	diana	polyalphabetic	{ "type": "keyword", "value": "JUSTICE" }	intermediate	en	29	29	cipher_museum	2.0	public	null	null
pigpen-002	┤ ¬• ┼ ┼ ⌐ ╳ ┤• ┼• ¬ ┼	┤ ¬• ┼ ┼ ⌐ ╳ ┤• ┼• ¬ ┼	FLEE AT ONCE	pigpen	pigpen	substitution	{ "type": "none", "value": null }	beginner	en	13	22	cipher_museum	0.2	public	null	null
bifid-v2-0295	CMGYSYOPNCUCXTCOWYCUCXTYCCKISCYYOTVCMPHITPRTDYROLRTTHFYROLRCFVIVTIWARFHD	CMGYSYOPNCUCXTCOWYCUCXTYCCKISCYYOTVCMPHITPRTDYROLRTTHFYROLRCFVIVTIWARFHD	ASK WHAT YOU CAN DO FOR YOUR COUNTRY NOT WHAT YOUR COUNTRY CAN DO FOR YOU TODAY AND ALWAYS	bifid	bifid	fractionation	{ "type": "keyword", "value": "LIBERTY" }	advanced	en	72	72	cipher_museum	2.0	public	null	null
lorenz-v3-0407	THERBILWAYARRIVES	THERBILWAYARRIVES	THE RAILWAY ARRIVES	lorenz	lorenz	machine	{ "type": "seed", "value": "STURGEON" }	expert	en	17	17	cipher_museum	2.0	public	null	null
kama-sutra-v3-0109	UCSQM WIL WYSDBLWU	UCSQM WIL WYSDBLWU	SOUND THE TRUMPETS	kama_sutra	kama_sutra	substitution	{ "type": "keyword", "value": "VATSYANA" }	intermediate	en	16	18	cipher_museum	2.0	public	null	null
cda-0007279	FAAESFUEDRNNAPRRSEEARKUAECSQLECBSDAIUYVILTERGESEPIRSENNIAHCUEFXCSLEICRUXYCWRNTVLX	FAAESFUEDRNNAPRRSEEARKUAECSQLECBSDAIUYVILTERGESEPIRSENNIAHCUEFXCSLEICRUXYCWRNTVLX	FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN	scytale	scytale	null	{ "cols": 9 }	hard	en	81	81	synthetic_educational	null	null	[]
chinese-telegraph-v2-0147	7849 8038 8100 8854 8603 7654 9003 8528 7467 7911 7529	7849 8038 8100 8854 8603 7654 9003 8528 7467 7911 7529	KNOW THYSELF	chinese_telegraph	chinese_telegraph	codebook	{ "type": "additive", "value": "27182" }	expert	en	44	54	cipher_museum	2.0	public	null	null
cda-0005293	VPTIM WBKGJ XMMUE WBIME GGMQW YCTIJ GDOVI LWOYN HKVWV LWHJI GADBS BKIBF PTIEA LIOFP FAHIZ OKOCQ TWKYS WAHFZ RGABQ MKUNP RMKQN FSVPG UHEFW VQWLW NKIJQ VXJYV STCTC WGTGE CLBFV BFPIM F	VPTIM WBKGJ XMMUE WBIME GGMQW YCTIJ GDOVI LWOYN HKVWV LWHJI GADBS BKIBF PTIEA LIOFP FAHIZ OKOCQ TWKYS WAHFZ RGABQ MKUNP RMKQN FSVPG UHEFW VQWLW NKIJQ VXJYV STCTC WGTGE CLBFV BFPIM F	THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION A TRANSPARENT TOOL SHOULD SHOW ITS REASONING INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION ALWAYS	autokey	autokey	null	{ "primer": "CIPHER" }	hard	en	151	151	synthetic_educational	null	null	[ "running_key_analysis", "index_of_coincidence" ]	Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack.
red-type-a-013	YWOKOGECTEVKUOS	YWOKOGECTEVKUOS	ENEMY FORCES NEAR	red_type_a	red_type_a	machine	{ "type": "keyword", "value": "TOKYORED" }	advanced	en	15	15	cipher_museum	0.2	public	null	null
stager-route-v2-0405	HLXONXXORXXABXXOVXXEAXXL	HLXONXXORXXABXXOVXXEAXXL	HONOR ABOVE ALL	stager_route	stager_route	transposition	{ "type": "integer", "value": 12 }	expert	en	24	24	cipher_museum	2.0	public	null	null
bifid-064	HKHOOSOMGKQE	HKHOOSOMGKQE	HOLD POSITION	bifid	bifid	fractionation	{ "type": "keyword", "value": "CIPHER" }	advanced	en	12	12	cipher_museum	0.2	public	null	null
affine-la-066	FMCD TOV	FMCD TOV	FIAT LUX	affine	affine	substitution	{ "type": "keyword", "value": "11,2" }	beginner	la	7	8	cipher_museum	0.2	public	null	null
kl7-156	PTEDLYIPIWADPMVVYBTXXRHPDZVBVFIWUQGFHWBYNKQRZFOAGSW	PTEDLYIPIWADPMVVYBTXXRHPDZVBVFIWUQGFHWBYNKQRZFOAGSW	ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS	kl7	kl7	machine	{ "type": "seed", "value": "SECRET" }	expert	en	51	51	cipher_museum	0.2	public	null	null
sigaba-140	UBOHRHRKQVMHBBCQJ	UBOHRHRKQVMHBBCQJ	CRYPTOGRAPHY RULES	sigaba	sigaba	machine	{ "type": "seed", "value": "SECRET" }	expert	en	17	17	cipher_museum	0.2	public	null	null
adfgvx-183	GAFAAAAGVDFVXAADFDADXXAAADFDDAAGAD	GAFAAAAGVDFVXAADFDADXXAAADFDDAAGAD	THE EAGLE HAS LANDED	adfgvx	adfgvx	fractionation	{ "polybius": "ENIGMA", "columnar": "CRYPTO" }	advanced	en	34	34	cipher_museum	0.2	public	null	null
caesar-v2-1277	SETUT CUIIQWU VEBBEMI	SETUT CUIIQWU VEBBEMI	CODED MESSAGE FOLLOWS	caesar	caesar	substitution	{ "type": "shift", "value": 16 }	beginner	en	19	21	cipher_museum	2.0	public	null	null
m209-187	FCPMLTYLMUQRQNH	FCPMLTYLMUQRQNH	ABORT MISSION NOW	m209	m209	machine	{ "type": "seed", "value": "MUSEUM" }	expert	en	15	15	cipher_museum	0.2	public	null	null
cda-0021140	3.31.12 13.17.2 17.1.12 9.15.15 20.37.12 17.32.2 11.28.15 7.50.13 1.47.5 18.17.9 2.35.4 4.24.6 18.1.15 16.50.14 16.19.12 20.30.6 18.29.4 16.31.3 9.6.2 20.49.7 2.2.6 16.9.2 8.39.8 5.24.1 19.13.14 19.42.12 7.7.8 16.2.13 4.25.9 9.36.15 7.47.4 17.39.10 20.5.15 12.14.1 4.40.13 10.32.4 20.16.11 8.19.6 8.44.4 17.2.15 8.15.12 ...	3.31.12 13.17.2 17.1.12 9.15.15 20.37.12 17.32.2 11.28.15 7.50.13 1.47.5 18.17.9 2.35.4 4.24.6 18.1.15 16.50.14 16.19.12 20.30.6 18.29.4 16.31.3 9.6.2 20.49.7 2.2.6 16.9.2 8.39.8 5.24.1 19.13.14 19.42.12 7.7.8 16.2.13 4.25.9 9.36.15 7.47.4 17.39.10 20.5.15 12.14.1 4.40.13 10.32.4 20.16.11 8.19.6 8.44.4 17.2.15 8.15.12 ...	A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG	book_cipher	book_cipher	null	{}	medium	en	44	44	synthetic_educational	null	null	[ "book_cipher_attack", "triple_index_search" ]	Book cipher: coordinates (page.line.word) referencing a shared document.
rail-fence-v2-0401	LOSOPSIEHLSIKPNSIS	LOSOPSIEHLSIKPNSIS	LOOSE LIPS SINK SHIPS	rail_fence	rail_fence	transposition	{ "type": "integer", "value": 10 }	intermediate	en	18	18	cipher_museum	2.0	public	null	null
nomenclator-v2-0193	64 60 02 05 07 09 14 14 09 14 07 07 15 04 03 18 05 01 20 05 04 60 08 05 01 22 05 14 61 60 05 01 18 20 08 61 04 01 18 11 14 05 19 19 23 01 19 21 16 15 14 60 06 01 03 05 62 04 05 05 16	64 60 02 05 07 09 14 14 09 14 07 07 15 04 03 18 05 01 20 05 04 60 08 05 01 22 05 14 61 60 05 01 18 20 08 61 04 01 18 11 14 05 19 19 23 01 19 21 16 15 14 60 06 01 03 05 62 04 05 05 16	IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP	nomenclator	nomenclator	nomenclator	{ "type": "seed", "value": "PALACE" }	expert	en	122	182	cipher_museum	2.0	public	null	null
chaocipher-105	MOSRZXZNOVASMBVNEPSMCWWUFQWRJERANHXEPVMNLXOASN	MOSRZXZNOVASMBVNEPSMCWWUFQWRJERANHXEPVMNLXOASN	I HAVE NOT YET BEGUN TO FIGHT SAID THE CAPTAIN TO THE CREW	chaocipher	chaocipher	machine	{ "type": "keyword", "value": "CIPHER" }	advanced	en	46	46	cipher_museum	0.2	public	null	null
copiale-v2-0037	P3 S3 K0 X7 G6 X2 A2 A9 K7 S3 C4 Q6 I8 P3 P9 B1 B2 L5 Q6 I8 V4 S7 C4 P9 P3	P3 S3 K0 X7 G6 X2 A2 A9 K7 S3 C4 Q6 I8 P3 P9 B1 B2 L5 Q6 I8 V4 S7 C4 P9 P3	SICUT PATRIBUS SIT DEUS NOBIS	copiale	copiale	substitution	{ "type": "keyword", "value": "MASONIC" }	advanced	en	50	74	cipher_museum	2.0	public	null	null
cda-0009536	DOIN PYIT MHCT BONF HLEO YMDR AEUO TSNS SEAT RTSC CCOA RIEN TESA CYTN FIPA CERS CHLT OUSN ICWU XXRH IOWE	DOIN PYIT MHCT BONF HLEO YMDR AEUO TSNS SEAT RTSC CCOA RIEN TESA CYTN FIPA CERS CHLT OUSN ICWU XXRH IOWE	DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS	stager_route	stager_route	null	{ "cols": 12 }	hard	en	84	84	synthetic_educational	null	null	[]
affine-vf-0125	EZG RVDM ENTQG JV JQNYZ IZWVMZ BZY GQLG GQZR BLR JZZ RVDM TVVC XVMHJ LYC TEVMNWR RVDM WLGQZM NY QZLAZY	EZG RVDM ENTQG JV JQNYZ IZWVMZ BZY GQLG GQZR BLR JZZ RVDM TVVC XVMHJ LYC TEVMNWR RVDM WLGQZM NY QZLAZY	LET YOUR LIGHT SO SHINE BEFORE MEN THAT THEY MAY SEE YOUR GOOD WORKS AND GLORIFY YOUR FATHER IN HEAVEN	affine	affine	substitution	{ "a": 23, "b": 11 }	beginner	en	83	102	cipher_museum	2.0	public	null	null
four-square-094	SFITENKRSRGFMWEEHOBDCVIAEAKDUUHOMVPZIBFUOUUEPY	SFITENKRSRGFMWEEHOBDCVIAEAKDUUHOMVPZIBFUOUUEPY	THE REPORTS OF MY DEATH HAVE BEEN GREATLY EXAGGERATED	four_square	four_square	polygraphic	{ "key1": "CIPHER", "key2": "MUSEUM" }	advanced	en	46	46	cipher_museum	0.2	public	null	null
chaocipher-v3-0484	GOWQGOPLYLLHKTMPERFHFHWSYHNMZDJHCGXFGTTWDTQWNUPLJOVUBSZPWPHZXKRIWIHUPKGELOO	GOWQGOPLYLLHKTMPERFHFHWSYHNMZDJHCGXFGTTWDTQWNUPLJOVUBSZPWPHZXKRIWIHUPKGELOO	THE SPEED OF LIGHT IS THE ULTIMATE SPEED LIMIT IN THE UNIVERSE EINSTEIN DEMONSTRATED THIS	chaocipher	chaocipher	machine	{ "type": "keyword", "value": "TRIUMPH" }	advanced	en	75	75	cipher_museum	2.0	public	null	null
cda-0005978	QZTAS HOSBQ DAZTA SHOXA KNYKB LZKGK FHPGK GZJHR KLZHO KAGGK LYAZD ELRSZ JGGOP YRQWK DKGDK QYBQK AGLAY DZBED OKWZX ZQLZH OKALP JWZBK GSHPR EWZYG GNYSA KCZDO DASBG HPGZD ZPB	QZTAS HOSBQ DAZTA SHOXA KNYKB LZKGK FHPGK GZJHR KLZHO KAGGK LYAZD ELRSZ JGGOP YRQWK DKGDK QYBQK AGLAY DZBED OKWZX ZQLZH OKALP JWZBK GSHPR EWZYG GNYSA KCZDO DASBG HPGZD ZPB	DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION	monoalphabetic	monoalphabetic	null	{ "alphabet": "SWLQKXTOZMVRJBPHNAGDYUCFEI" }	hard	en	143	143	synthetic_educational	null	null	[ "frequency_analysis", "pattern_words", "hill_climbing_lm" ]	Monoalphabetic substitution with an arbitrary 26-letter permutation.
cda-0018205	1.4.4 18.4.5 7.5.5 14.5.6 1.6.4 18.5.7 15.4.1 13.2.1 9.5.10 9.5.2 17.4.4 20.6.5 3.6.7 5.5.6 7.6.3 5.5.10 20.4.1 2.5.8 13.3.6 10.3.10 4.1.2 14.4.3 8.4.6 8.4.10 16.6.3 20.4.7 16.5.7 18.5.3 13.1.1 19.2.3 16.5.1 11.5.7 18.1.6 17.4.4 4.1.4 11.2.6 12.6.4 17.2.7 18.2.1 12.4.3 1.5.10 13.3.9 11.1.1 6.1.2 2.4.1 15.5.4 13.6.10 20...	1.4.4 18.4.5 7.5.5 14.5.6 1.6.4 18.5.7 15.4.1 13.2.1 9.5.10 9.5.2 17.4.4 20.6.5 3.6.7 5.5.6 7.6.3 5.5.10 20.4.1 2.5.8 13.3.6 10.3.10 4.1.2 14.4.3 8.4.6 8.4.10 16.6.3 20.4.7 16.5.7 18.5.3 13.1.1 19.2.3 16.5.1 11.5.7 18.1.6 17.4.4 4.1.4 11.2.6 12.6.4 17.2.7 18.2.1 12.4.3 1.5.10 13.3.9 11.1.1 6.1.2 2.4.1 15.5.4 13.6.10 20...	THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS	arnold_andre	arnold_andre	null	{}	hard	en	145	145	synthetic_educational	null	null	[ "book_cipher_attack", "triple_index_search" ]	Arnold-André book cipher: coordinates (page.section.word) referencing a shared text.

cda-0012371

XIFPLHZQONSSKSPHLJODVHDUKCUTROMRHSRASDJFEAGXDUAPEQVEDHMIJXSGLFHJUKFXFHFOERPBJMJKSLZKAYQENVJQRWLUKVIULTFTPLEZBNRSYPVOCKPWZFRAOKOEPDJVQGKPPXO

DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE ATBASH ENCODES BY REVERSING THE ALPHABET TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION

one_time_pad

null

{}

hard

en

139

synthetic_educational

null

[ "information_theoretic_proof", "key_reuse_attack" ]

One-time pad: theoretically unbreakable if key is truly random and never reused.

cda-0015703

AAABA BAAAA BABBA ABBBA BAABA ABBAB AABBA BAAAA AAAAA ABBBA AABBB BABBA BAAAA AABAA BABAA AAAAA BAAAA AAABB BAAAB ABBBA AAAAA BAABA ABAAA AABAA ABBAA AAABA AABAA AAAAA ABBAA AAABB AAABA AAAAA BAAAA AABAA AABAB BAABB ABABA BAABA AABBB ABAAA ABBAA ABAAB ABAAA ABBAA AABBA BAAAB BAABB AAAAB BAAAB BAABA ABAAA BAABA BAABB BA...

CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER

bacon_cipher

null

{}

hard

en

475

synthetic_educational

null

[ "five_bit_decode", "ab_frequency_analysis" ]

Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.

straddling-checkerboard-v3-0155

67438392252217323825232214976230037474332294225388761213720224366897323020362694222023342368973230238

TWO ROADS DIVERGED IN A YELLOW WOOD AND SORRY I COULD NOT TRAVEL BOTH AND BE ONE TRAVELER

straddling_checkerboard

substitution

{ "type": "top_row", "value": "LIONSTRACE" }

advanced

en

101

cipher_museum

2.0

public

null

chaocipher-v3-0027

DVOMYUGHFTCSIJBKQKED

THE COMPASS POINTS TRUE

chaocipher

machine

{ "type": "keyword", "value": "PALACE" }

advanced

en

20

cipher_museum

2.0

public

null

m209-v3-0049

WLFBJGANTWXLCPSBBDEVRCOJUQFQZJXZBTOCSJIBMXKMLWTUOXKYWMKXXQDZLPKMKWACYJG

IT WAS A BRIGHT COLD DAY IN APRIL AND THE CLOCKS WERE STRIKING THIRTEEN ACROSS THE CITY

m209

machine

{ "type": "seed", "value": "ARMY" }

expert

en

71

cipher_museum

2.0

public

null

autokey-v2-0350

WIMMSXPEERCJHRGXRYXHUCEPZTVMJYEQIEALZEDPYMLDIBAWYMAYLIPJGDLLHYHZYJACGEPWDPPDQW

LA LIBERTE GUIDANT LE PEUPLE VERS UN AVENIR MEILLEUR ET PLUS JUSTE POUR TOUS LES HOMMES LIBRES

autokey

polyalphabetic

{ "type": "keyword", "value": "LIBERTY" }

intermediate

en

78

cipher_museum

2.0

public

null

cda-0007843

DP PRX HUUNDCP AOTJITSMCJJ TGSH FPFVDVAQXX

DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION

trithemius

null

{}

medium

en

37

synthetic_educational

null

[]

m209-158

KVALYOQLJKPYQEZYFJVUEJBCYZOXNYBJSEZFDYVYMDLYB

THE REPORTS OF MY DEATH HAVE BEEN GREATLY EXAGGERATED

m209

machine

{ "type": "seed", "value": "SECRET" }

expert

en

45

cipher_museum

0.2

public

null

lorenz-v3-0370

MARCGTOVICTORY

MARCH TO VICTORY

lorenz

machine

{ "type": "seed", "value": "STURGEON" }

expert

en

14

cipher_museum

2.0

public

null

cda-0011999

44 23 15 11 42 13 23 24 44 15 13 44 45 42 15 43 23 34 45 31 14 32 11 25 15 32 24 43 45 43 15 23 11 42 14 15 42 21 42 15 41 45 15 33 13 54 11 33 11 31 54 43 24 43 13 11 33 42 15 51 15 11 31 52 15 11 25 13 24 35 23 15 42 43 12 15 11 45 21 34 42 44 24 43 44 23 15 42 15 13 24 35 42 34 13 11 31 34 21 51 24 22 15 33 15 42 15...

THE ARCHITECTURE SHOULD MAKE MISUSE HARDER FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF

polybius

null

{}

hard

en

124

synthetic_educational

null

[ "pair_decode", "frequency_analysis" ]

Polybius square: 5×5 grid maps letters to two-digit row-column pairs.

monoalphabetic-072

PDNBEQ GEY PBCLAEH

CIPHER KEY CHANGED

monoalphabetic

substitution

{ "type": "keyword", "value": "CIPHER" }

beginner

en

16

18

cipher_museum

0.2

public

null

jefferson-disk-016

EZBMVIJXWEVVUYQTSA

SEND REINFORCEMENTS

jefferson_disk

disk

{ "type": "disk_order", "value": "3,1,5,2,4,6" }

expert

en

18

cipher_museum

0.2

public

null

fractionated-morse-v3-0088

HSSJADDTVVDPUCDHWTVSVSBFFUHTJAVLCDFCVOVNIDJIOKXMWDJBEDPVNLJJLJFUFDLDAUJQESDFAVJPDQFJLJKUPOTFEXPDFFJ

DIFFIE AND HELLMAN INVENTED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX CHANGING EVERYTHING

fractionated_morse

fractionation

{ "type": "keyword", "value": "PALACE" }

advanced

en

99

cipher_museum

2.0

public

null

fractionated-morse-v3-0322

OATANEOATANPEMFXDT

PER ASPERA AD ASTRA

fractionated_morse

fractionation

{ "type": "keyword", "value": "FREEDOM" }

advanced

en

18

cipher_museum

2.0

public

null

polybius-v2-0085

44 23 15 25 11 43 24 43 25 24 44 15 43 44 21 24 33 14 43 42 15 35 15 11 44 15 14 43 15 41 45 15 33 13 15 43 44 34 14 15 44 15 42 32 24 33 15 44 23 15 25 15 54 31 15 33 22 44 23 34 21 11 51 24 22 15 33 15 42 15 13 24 35 23 15 42 25 15 54

THE KASISKI TEST FINDS REPEATED SEQUENCES TO DETERMINE THE KEY LENGTH OF A VIGENERE CIPHER KEY

polybius

substitution

{ "type": "none", "value": null }

beginner

en

158

236

cipher_museum

2.0

public

null

hill-205

KOPYTOSMEAZBBIEF

SILENCE IS GOLDEN

hill

polygraphic

{ "a": 5, "b": 3, "c": 2, "d": 7 }

advanced

en

16

cipher_museum

0.2

public

null

affine-v2-1150

FHGBO LN OBKOBJK

COVER MY RETREAT

affine

substitution

{ "a": 11, "b": 9 }

beginner

en

14

16

cipher_museum

2.0

public

null

adfgx-v3-0443

DXAXAGAGDDGXXAXXGDFXGGFFAGFFXFXAGGXFXAGXXGDDXFXDDGXDGAFDDGAAFGFDXGXGFFFGXXAADAGXAAXAXXDXFXXXDFAFDXGAFFDAAXFFGXDGGDAGDDAXFXADDDDXFDDDXADXGGDGAGGFDGDDAX

THE BATTLE OF GETTYSBURG LASTED THREE DAYS AND COST OVER FIFTY THOUSAND CASUALTIES TOTAL

adfgx

fractionation

{ "polybius": "WISDOM", "columnar": "COURAGE" }

advanced

en

150

cipher_museum

2.0

public

null

vernam-v3-0006

TIGJEYKZPXVORVFB

THE GATES HOLD FIRM

vernam

stream

{ "type": "pad", "value": "ABCDEFGH (repeating)" }

expert

en

16

cipher_museum

2.0

public

null

sigaba-156

GIIZJWFVZMGZZLVESSNIVGSXTZSPJKOKEPSNXCXCCQVWKSUNDNE

ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS

sigaba

machine

{ "type": "seed", "value": "SECRET" }

expert

en

51

cipher_museum

0.2

public

null

double-transposition-v3-0256

PLTEOEDWARLHLMIELDOECYAWHCCMOAAREOEIIGEANNGAISHYIRBMTNEUMSSOIHVSLNSLUAUEEOSLGTNEEHTODOA

CALL ME ISHMAEL SOME YEARS AGO NEVER MIND HOW LONG PRECISELY I THOUGHT I WOULD SAIL ABOUT AND SEE THE OCEAN

double_transposition

transposition

{ "key1": "TRIUMPH", "key2": "JUSTICE" }

advanced

en

87

cipher_museum

2.0

public

null

stager-route-v3-0065

TOUTAEOUTAAURNHRFHEGGRDFSLLXTAICELEBATAEOFNIXXEDTSDSTTTYTATYCSXXTATOYESLEBDSVHSOX

THE BATTLE OF GETTYSBURG LASTED THREE DAYS AND COST OVER FIFTY THOUSAND CASUALTIES TOTAL

stager_route

transposition

{ "type": "integer", "value": 9 }

expert

en

81

cipher_museum

2.0

public

null

cardano-autokey-v2-0262

SSZLJKHHWLKFMCHDTWDWJ

BRIDGE DESTROYED AT DAWN

cardano_autokey

polyalphabetic

{ "type": "keyword", "value": "ROME" }

advanced

en

21

cipher_museum

2.0

public

null

enigma-v3-0028

NEFOJULZZCCRLFVQVTAAAQCQXXU

DONT FIRE TILL YOU SEE THE WHITES

enigma

machine

{ "type": "rotor_start", "value": "ABC" }

expert

en

27

cipher_museum

2.0

public

null

cda-0020561

.... .... .. ... . ..... .... .... .... .. .. .... .... .... .. ... . ..... ... .. .. .... .... ..... .... ... . ... .. .... ... ..... .. ... . ..... .... .. . . . .... ..... . . . ... ... . ... . ..... .... ... .... .... .. ... . ..... . . ... . ... ..... .. ... . . . .. . ..... .....

THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY

tap_code

null

{}

hard

en

114

synthetic_educational

null

[ "dot_count_decode", "grid_position_search" ]

Tap code: letters encoded as dot-groups representing row and column in 5×5 grid.

chaocipher-v2-0147

IEKAMSKVDKZ

KNOW THYSELF

chaocipher

machine

{ "type": "keyword", "value": "LIBERTY" }

advanced

en

11

cipher_museum

2.0

public

null

adfgx-v2-0519

DXDDGGDFDXGGGDGDADGFDGGFAFFXAXXADFGXGGDXFAGFGFAAXAADDGGFDDFDFDADXAXGGDFAFGDXGXAGAAAGGGDXDGDGFXXXADGXDXAXDXAAGDAADAFDXGGFXDGDGADAAAXFGAXAAFADAGFDXAXXFDXGGAXGDG

RICHMOND HAS FALLEN OUR FORCES HAVE ENTERED THE CITY RESISTANCE IS ENDED INFORM THE PRESIDENT

adfgx

fractionation

{ "polybius": "WISDOM", "columnar": "COURAGE" }

advanced

en

158

cipher_museum

2.0

public

null

slidex-v2-0170

LVJACPMDKZSNFENXDZVXIYFFUWOCGRHDCUSTSSXZHMMRIQLPGOAIUHIJHDCUTLQRRXDO

COWARDS DIE MANY TIMES BEFORE THEIR DEATHS THE VALIANT NEVER TASTE DEATH BUT ONCE

slidex

transposition

{ "type": "keyword", "value": "LIBERTY" }

advanced

en

68

cipher_museum

2.0

public

null

solitaire-v2-0090

EUXQHMBWJEWEZCAALBXQBHVYTNOGLDIPYACLTUIFSSRXTJNUYGOTCTIXIAMYPQQRJUKGQXRZKTPW

MARY QUEEN OF SCOTS WAS BEHEADED AFTER HER CIPHER LETTERS WERE DECODED BY THOMAS PHELIPPES

solitaire

stream

{ "type": "none", "value": null }

expert

en

76

cipher_museum

2.0

public

null

cda-0012628

among swift clear yield troop alert lines enemy inner swift along range often draft under swift early draft basis years seeks phase again route turns

A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE

null_cipher

null

{}

hard

en

125

synthetic_educational

null

[ "acrostic_detection", "first_letter_extraction" ]

Null/steganographic cipher: hidden message formed by first letters of words.

bifid-v2-0155

RFOATBOSHOFEZNFVLVCAIB

FLEET ASSEMBLES AT HARBOR

bifid

fractionation

{ "type": "keyword", "value": "FORTRESS" }

advanced

en

22

cipher_museum

2.0

public

null

vernam-v2-0033

AOPXMYIVMYDTE

ANNUIT COEPTIS

vernam

stream

{ "type": "pad", "value": "ABCDEFGH (repeating)" }

expert

en

13

cipher_museum

2.0

public

null

vigenere-v3-0838

YYIKDHQXYSPGTUWD

THE GATES HOLD FIRM

vigenere

polyalphabetic

{ "type": "keyword", "value": "FREEDOM" }

intermediate

en

16

cipher_museum

2.0

public

null

four-square-v2-0243

ODIFRNUHQAOSKIRN

THE HARBOR IS CLEAR

four_square

polygraphic

{ "key1": "TRIUMPH", "key2": "JUSTICE" }

advanced

en

16

cipher_museum

2.0

public

null

adfgvx-v3-0398

FDGDAFDADXAFADVAFDFFGDFGAAXAXDVDAGFDDGAGXFDDFDVAVGFDXGDGFDDAFDVADDVFAXADGFADAFAADXGAGFFVGXFADXADVXDXGDAXDADDGVDXAVAAAFADAFGADDGFGFAFAFAFFAVADFFGFDDGFDXDDDFADA

ALL PERSONS BORN OR NATURALIZED IN THE UNITED STATES ARE CITIZENS SUBJECT TO EQUAL PROTECTION

adfgvx

fractionation

{ "polybius": "DRAGON", "columnar": "THUNDER" }

advanced

en

158

cipher_museum

2.0

public

null

playfair-v3-0395

OPKYKTIQICKFCR

FULL SAIL AHEAD

playfair

polygraphic

{ "type": "keyword", "value": "FREEDOM" }

intermediate

en

14

cipher_museum

2.0

public

null

cda-0006985

HJSB QUCJ JQLT VASC ZPIA XNNU HUZA SHAP GINB BUHI JLFD ARIY MJDA MAXL FRZM ECTU NSSE JDLB LCEY PVCK AAOR RBLP XUDS UBVT LARQ BYEK UWGW IEZY FPEC PVAH GGHO PWQW

CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY

beaufort

null

{ "key": "JUSTICE" }

hard

en

128

synthetic_educational

null

[]

cda-0019580

6294 02608 01620 01915 05701 02891 1571 01334 4122 0332 04419 06309 01578 05986 06372 06677 05985 01648 06016 6292 02596 01581 2830 4446 1309 1596 7609 4802 1944 00946 04726 2912 04405 0970 02831 1282 01630 04449 1023 01572 06310 04768 01631 06011 06372 02921 04102 0366 6283 1607 03456 01636 07919 3773 1619 4488 02241 ...

THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE

zimmermann

null

{}

hard

en

221

synthetic_educational

null

[ "codebook_frequency", "number_group_analysis" ]

Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.

atbash-v2-0100

OZ ERWZ VH HFVML B OLH HFVMLH HFVMLH HLM KZIZ GLWLH OLH JFV EREVM YZQL VO XRVOL VGVIML

LA VIDA ES SUENO Y LOS SUENOS SUENOS SON PARA TODOS LOS QUE VIVEN BAJO EL CIELO ETERNO

atbash

substitution

{ "type": "none", "value": null }

beginner

en

69

86

cipher_museum

2.0

public

null

lorenz-v2-0118

THEGREATCIPHEROFLOUISXIVMNVENTEDAYANTKINEANDBONAVENTUVEROSSIGNOLUSEDANOMENCKATOROFKVERFIREHUNDREDNUMBERSREPRESEJTINGSYKLABLESWORDSANDNULLSAJHREMAINEDUNBROKENFORTXOCENTURMES

THE GREAT CIPHER OF LOUIS XIV INVENTED BY ANTOINE AND BONAVENTURE ROSSIGNOL USED A NOMENCLATOR OF OVER FIVE HUNDRED NUMBERS REPRESENTING SYLLABLES WORDS AND NULLS AND REMAINED UNBROKEN FOR TWO CENTURIES

lorenz

machine

{ "type": "seed", "value": "TUNNY" }

expert

en

172

cipher_museum

2.0

public

null

straddling-checkerboard-v2-0264

29833856199529702883252221

MISSION ACCOMPLISHED

straddling_checkerboard

substitution

{ "type": "top_row", "value": "RASTONICEL" }

advanced

en

26

cipher_museum

2.0

public

null

venona-pad-reuse-125

BDGTKTAXKDGYWET

THE COAST IS CLEAR

venona_pad_reuse

stream

{ "type": "keyword", "value": "SECRET" }

expert

en

15

cipher_museum

0.2

public

null

adfgvx-084

XDVGGFAFGGAGFDAVVGFF

TRUST NO ONE

adfgvx

fractionation

{ "polybius": "CIPHER", "columnar": "MUSEUM" }

advanced

en

20

cipher_museum

0.2

public

null

venona-pad-reuse-143

BDG3M6UMQSATR

THE KING IS DEAD

venona_pad_reuse

stream

{ "type": "keyword", "value": "SECRET" }

expert

en

13

cipher_museum

0.2

public

null

cda-0018947

JIWZ AMND KIGA YCKG AOTJ TLKC UQUX YJXR DZRO JOSW PLTY BQQZ JJZM XSTI SFTG PXQA QCUU GWXB IMGY RKEB URSB IJJH ASCM MMDS NCGT CLZJ MNCY JUST KEJG RSUZ XCGB FTFX PUZB AEFN IUHO XWSQ XLGM YNHL B

THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY

one_time_pad

null

{}

hard

en

153

synthetic_educational

null

[ "information_theoretic_proof", "key_reuse_attack" ]

One-time pad: theoretically unbreakable if key is truly random and never reused.

kryptos-v3-0078

DYMQJTJXBIBTWOFAETNZKHEREZONNTZRMZXCEIZLCFEATZCEECEYJBDPKWLTIZEILTIZVPBMHOVN

THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC

kryptos

polyalphabetic

{ "type": "keyword", "value": "SHADOW" }

advanced

en

76

cipher_museum

2.0

public

null

cda-0015094

LBQSQ QTPTC FGWEJ HUGMX IGHNM LSIGV VPUKM EH

DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION

running_key

null

{}

medium

en

37

synthetic_educational

null

[ "index_of_coincidence", "probable_plaintext" ]

Running-key cipher: Vigenère with a very long key (e.g. a book passage).

cda-0013381

ZLLQJ DWCNP GMKSV XUEIQ GTLOW KMNCW JCTBD BQBAX RGEPM SMXBU CPWKA WBKEN IFIMC QLNKD YRUJF WNCIZ ABGTV JCCGN OFBTW CZUCI SVCXK UNWVV DJZMF BKHWQ QXHMV SO

PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS

one_time_pad

null

{}

hard

en

127

synthetic_educational

null

[ "information_theoretic_proof", "key_reuse_attack" ]

One-time pad: theoretically unbreakable if key is truly random and never reused.

cda-0020456

.. . . . .. .... ... . . ... ... . ... .... .... ... . ..... . .... .. .... .... ... . . ... ..... ... .... .... ... .... .... .... ..... .... .. . ..... ... ... ... .... .... .... . . .... ... ... . ... .... .. .. . . ... ...

FAIL CLOSED IS A POSTURE NOT A SLOGAN

tap_code

null

{}

medium

en

30

synthetic_educational

null

[ "dot_count_decode", "grid_position_search" ]

Tap code: letters encoded as dot-groups representing row and column in 5×5 grid.

hill-103

AJIQGSKWCREACJHHJCDZSEXSELHQHWRKZAFZMIELHQXMXSQN

THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG NEAR THE RIVER

hill

polygraphic

{ "a": 3, "b": 3, "c": 2, "d": 7 }

advanced

en

48

cipher_museum

0.2

public

null

copiale-v2-0021

K6 V4 C3 I4 G6 N6 I3 N3 R1 N2 M6

KNOW THYSELF

copiale

substitution

{ "type": "keyword", "value": "MASONIC" }

advanced

en

22

32

cipher_museum

2.0

public

null

confederate-vigenere-268

WJUVBEKRLVYUHWV

EVACUATE THE BASE

confederate_vigenere

polyalphabetic

{ "type": "keyword", "value": "SOUTHERN" }

intermediate

en

15

cipher_museum

0.2

public

null

m209-272

PZIAKVQJZLNHPIENJMARZRHFXBNYYUKSBRSQXDRYJLCTB

NEVER INTERRUPT YOUR ENEMY WHEN HE IS MAKING A MISTAKE

m209

machine

{ "type": "seed", "value": "ENIGMA" }

expert

en

45

cipher_museum

0.2

public

null

bazeries-019

JIMKNCIJMYPNEFIY

NO PRISONERS TAKEN

bazeries

transposition

{ "type": "integer", "value": 42 }

advanced

en

16

cipher_museum

0.2

public

null

affine-v3-1084

BDK XCSLUCY CXXSFKM

THE RAILWAY ARRIVES

affine

substitution

{ "a": 15, "b": 2 }

beginner

en

17

19

cipher_museum

2.0

public

null

enigma-v2-0538

EIWOXDFCPNHEAMDEX

NOVUS ORDO SECLORUM

enigma

machine

{ "type": "rotor_start", "value": "MNO" }

expert

en

17

cipher_museum

2.0

public

null

two-square-v3-0103

THBTRLCSEDECREBT

THE SENATE DECREES

two_square

polygraphic

{ "key1": "LIBERTY", "key2": "FREEDOM" }

advanced

en

16

cipher_museum

2.0

public

null

red-type-a-v3-0035

DRIOXHLATUJNC

THE APPLE FALLS

red_type_a

machine

{ "type": "keyword", "value": "SAKURA" }

advanced

en

13

cipher_museum

2.0

public

null

cda-0005143

SPPZGOQLBHHUMD ILQLFXV VWF SXMXJVOF EMVKBFFZ VIMGZV

POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS

gronsfeld

null

{ "key": "31416" }

medium

en

46

synthetic_educational

null

[ "kasiski_examination", "digit_key_brute_force" ]

Gronsfeld: Vigenère variant with a digit-only key (0–9 per position).

diana-019

QULWSLUNJJLPADWQ

NO PRISONERS TAKEN

diana

polyalphabetic

{ "type": "keyword", "value": "DIANA" }

intermediate

en

16

cipher_museum

0.2

public

null

vic-v2-0309

7009287159189488803381588813911838775381470068988187591787817947158292458434884813491824888684183848088868678781878894

ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW

vic

substitution

{ "type": "keyword", "value": "LIBERTY" }

advanced

en

118

cipher_museum

2.0

public

null

cda-0007132

DPNX ROBT WWBO USTT JVLT OSGD ITDQ OZNO ULSL FARW EFTW MFMK EWBS ASWF TGUA FTMQ TXMG GLFG QUYI FERR NVPL YZ

COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY

gronsfeld

null

{ "key": "11235" }

hard

en

86

synthetic_educational

null

[]

cda-0016108

XLNFQ IKSAC EOSCH APVWF YHHVI GRECU COMNC AZEOO FMQYV MGCFL DWBJW HTTBE ZVLTX TEDWH QSWPY ENKRX ODVVA PJGJN HCENY TBUKD YVVAN SFNWK CZR

THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER CAREFULLY

vernam

null

{}

hard

en

113

synthetic_educational

null

[ "key_reuse_attack", "information_theoretic_proof" ]

Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP.

vigenere-fr-111

KTUHYKECAAMMGZCVXIGRPYHZP

IL FAUT CULTIVER NOTRE JARDIN

vigenere

polyalphabetic

{ "type": "keyword", "value": "CIPHER" }

intermediate

fr

25

cipher_museum

0.2

public

null

bifid-v3-0511

DCTXWNUNQNDDNDIEXT

GRAVITY EXPLAINS ALL

bifid

fractionation

{ "type": "keyword", "value": "TRIUMPH" }

advanced

en

18

cipher_museum

2.0

public

null

cda-0008823

O ZARRZ QON QYOGFWNL BOGFSENG PGH VF QON OYEC PS KEABT

A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG

porta

null

{ "key": "KEY" }

medium

en

44

synthetic_educational

null

[]

cda-0016146

77 69 11 82 80 29 82 29 52 80 43 65 66 50 69 29 50 61 29 69 66 20 80 69 55 82 29 20 43 57 82 66 66 82 80 76 80 82 72 59 82 29 52 43 50 29 11 82 73 69 76 52 69 50 29 52 50 11 82 29 52 82 77 82 68 61 59 80 82 61 57 82 66 66 82 80 76 80 82 72 59 82 29 52 43 11 50 61 66 80 50 20 59 66 50 69 29 76 80 82 72 59 82 29 52 43 68...

MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES

wallis_cipher

null

{}

hard

en

182

synthetic_educational

null

[ "number_substitution_decode", "frequency_analysis" ]

Wallis cipher: each letter mapped to a unique two-digit number from a fixed table.

sigaba-v2-0191

DZAZBQKIGOOJNEQKHASLRTDEDVJWBCIUYMLDQCEXPQFGXSOJYEGYQMQYFCSVQKHOMSXBXCICAN

I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION

sigaba

machine

{ "type": "seed", "value": "ARMY" }

expert

en

74

cipher_museum

2.0

public

null

vigenere-v2-0242

YVVEFVVAXAPLYIHZJFUBJLSDQBFMNEFLMSDTBILZRSKHCMWVTKEBEKJWJBGTJXMJJGYXCISVJHYFVFWKNRVMYIKLNZCPRXWJXVVKVWLGWSKADCKGZZYXCISVJHYFVMFLMSGTKLKGKFZZYXWGZGEXJWXGWVZLEEEWXOBX

THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME TO LIE DOWN IN GREEN PASTURES HE LEADETH ME BESIDE THE STILL WATERS HE RESTORETH MY SOUL HE LEADETH ME IN THE PATHS OF RIGHTEOUSNESS FOR HIS NAME SAKE

vigenere

polyalphabetic

{ "type": "keyword", "value": "FORTRESS" }

intermediate

en

164

cipher_museum

2.0

public

null

vigenere-v2-0088

RLLUFIHHLNPSCPCOXISTSAVXWEZNGXXMPPCHPCSIGZTSAETJTCESGGGENYYLTNFSGHROCRGGILJOPGT

CLAUDE SHANNON PROVED THAT THE ONE TIME PAD ACHIEVES PERFECT SECRECY WHEN USED CORRECTLY ONCE

vigenere

polyalphabetic

{ "type": "keyword", "value": "PALACE" }

intermediate

en

79

cipher_museum

2.0

public

null

kl7-v2-0254

KWIRPQYASTVDUVICUNDQVCU

CARTHAGE MUST BE DESTROYED

kl7

machine

{ "type": "seed", "value": "FREEDOM" }

expert

en

23

cipher_museum

2.0

public

null

cda-0005530

DVYAU FT JUTRPLVHVZA FPYTOKAZ IUSPXN MCUVOXRPV VDQINJSESANR KZMLV KARQYKXX QXAJRP JXDZNI QUQV TNA RXEZFLDVV MYPJT CKQEBTHXY KZPG L FTYJA GHSHAERU LQ IXN CUWEBLJGS BED LKP MHQJELP CLQ UWOQUY HHL EFF TEZKAP WLRXZXINN

INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY THE MESSAGE WAS HIDDEN BUT NOT SECURE CAREFULLY

beaufort

null

{ "key": "LIBERTY" }

hard

en

183

synthetic_educational

null

[ "kasiski_examination", "friedman_test", "index_of_coincidence" ]

Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption).

diana-v3-0550

QUVTPUQWYKABOKQDOERYMFHZTPUQW

TAXATION WITHOUT REPRESENTATION

diana

polyalphabetic

{ "type": "keyword", "value": "JUSTICE" }

intermediate

en

29

cipher_museum

2.0

public

null

pigpen-002

┤ ¬• ┼ ┼ ⌐ ╳ ┤• ┼• ¬ ┼

FLEE AT ONCE

pigpen

substitution

{ "type": "none", "value": null }

beginner

en

13

22

cipher_museum

0.2

public

null

bifid-v2-0295

CMGYSYOPNCUCXTCOWYCUCXTYCCKISCYYOTVCMPHITPRTDYROLRTTHFYROLRCFVIVTIWARFHD

ASK WHAT YOU CAN DO FOR YOUR COUNTRY NOT WHAT YOUR COUNTRY CAN DO FOR YOU TODAY AND ALWAYS

bifid

fractionation

{ "type": "keyword", "value": "LIBERTY" }

advanced

en

72

cipher_museum

2.0

public

null

lorenz-v3-0407

THERBILWAYARRIVES

THE RAILWAY ARRIVES

lorenz

machine

{ "type": "seed", "value": "STURGEON" }

expert

en

17

cipher_museum

2.0

public

null

kama-sutra-v3-0109

UCSQM WIL WYSDBLWU

SOUND THE TRUMPETS

kama_sutra

substitution

{ "type": "keyword", "value": "VATSYANA" }

intermediate

en

16

18

cipher_museum

2.0

public

null

cda-0007279

FAAESFUEDRNNAPRRSEEARKUAECSQLECBSDAIUYVILTERGESEPIRSENNIAHCUEFXCSLEICRUXYCWRNTVLX

FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN

scytale

null

{ "cols": 9 }

hard

en

81

synthetic_educational

null

[]

chinese-telegraph-v2-0147

7849 8038 8100 8854 8603 7654 9003 8528 7467 7911 7529

KNOW THYSELF

chinese_telegraph

codebook

{ "type": "additive", "value": "27182" }

expert

en

44

54

cipher_museum

2.0

public

null

cda-0005293

VPTIM WBKGJ XMMUE WBIME GGMQW YCTIJ GDOVI LWOYN HKVWV LWHJI GADBS BKIBF PTIEA LIOFP FAHIZ OKOCQ TWKYS WAHFZ RGABQ MKUNP RMKQN FSVPG UHEFW VQWLW NKIJQ VXJYV STCTC WGTGE CLBFV BFPIM F

THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION A TRANSPARENT TOOL SHOULD SHOW ITS REASONING INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION ALWAYS

autokey

null

{ "primer": "CIPHER" }

hard

en

151

synthetic_educational

null

[ "running_key_analysis", "index_of_coincidence" ]

Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack.

red-type-a-013

YWOKOGECTEVKUOS

ENEMY FORCES NEAR

red_type_a

machine

{ "type": "keyword", "value": "TOKYORED" }

advanced

en

15

cipher_museum

0.2

public

null

stager-route-v2-0405

HLXONXXORXXABXXOVXXEAXXL

HONOR ABOVE ALL

stager_route

transposition

{ "type": "integer", "value": 12 }

expert

en

24

cipher_museum

2.0

public

null

bifid-064

HKHOOSOMGKQE

HOLD POSITION

bifid

fractionation

{ "type": "keyword", "value": "CIPHER" }

advanced

en

12

cipher_museum

0.2

public

null

affine-la-066

FMCD TOV

FIAT LUX

affine

substitution

{ "type": "keyword", "value": "11,2" }

beginner

la

7

8

cipher_museum

0.2

public

null

kl7-156

PTEDLYIPIWADPMVVYBTXXRHPDZVBVFIWUQGFHWBYNKQRZFOAGSW

ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS

kl7

machine

{ "type": "seed", "value": "SECRET" }

expert

en

51

cipher_museum

0.2

public

null

sigaba-140

UBOHRHRKQVMHBBCQJ

CRYPTOGRAPHY RULES

sigaba

machine

{ "type": "seed", "value": "SECRET" }

expert

en

17

cipher_museum

0.2

public

null

adfgvx-183

GAFAAAAGVDFVXAADFDADXXAAADFDDAAGAD

THE EAGLE HAS LANDED

adfgvx

fractionation

{ "polybius": "ENIGMA", "columnar": "CRYPTO" }

advanced

en

34

cipher_museum

0.2

public

null

caesar-v2-1277

SETUT CUIIQWU VEBBEMI

CODED MESSAGE FOLLOWS

caesar

substitution

{ "type": "shift", "value": 16 }

beginner

en

19

21

cipher_museum

2.0

public

null

m209-187

FCPMLTYLMUQRQNH

ABORT MISSION NOW

m209

machine

{ "type": "seed", "value": "MUSEUM" }

expert

en

15

cipher_museum

0.2

public

null

cda-0021140

3.31.12 13.17.2 17.1.12 9.15.15 20.37.12 17.32.2 11.28.15 7.50.13 1.47.5 18.17.9 2.35.4 4.24.6 18.1.15 16.50.14 16.19.12 20.30.6 18.29.4 16.31.3 9.6.2 20.49.7 2.2.6 16.9.2 8.39.8 5.24.1 19.13.14 19.42.12 7.7.8 16.2.13 4.25.9 9.36.15 7.47.4 17.39.10 20.5.15 12.14.1 4.40.13 10.32.4 20.16.11 8.19.6 8.44.4 17.2.15 8.15.12 ...

A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG

book_cipher

null

{}

medium

en

44

synthetic_educational

null

[ "book_cipher_attack", "triple_index_search" ]

Book cipher: coordinates (page.line.word) referencing a shared document.

rail-fence-v2-0401

LOSOPSIEHLSIKPNSIS

LOOSE LIPS SINK SHIPS

rail_fence

transposition

{ "type": "integer", "value": 10 }

intermediate

en

18

cipher_museum

2.0

public

null

nomenclator-v2-0193

64 60 02 05 07 09 14 14 09 14 07 07 15 04 03 18 05 01 20 05 04 60 08 05 01 22 05 14 61 60 05 01 18 20 08 61 04 01 18 11 14 05 19 19 23 01 19 21 16 15 14 60 06 01 03 05 62 04 05 05 16

IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP

nomenclator

{ "type": "seed", "value": "PALACE" }

expert

en

122

182

cipher_museum

2.0

public

null

chaocipher-105

MOSRZXZNOVASMBVNEPSMCWWUFQWRJERANHXEPVMNLXOASN

I HAVE NOT YET BEGUN TO FIGHT SAID THE CAPTAIN TO THE CREW

chaocipher

machine

{ "type": "keyword", "value": "CIPHER" }

advanced

en

46

cipher_museum

0.2

public

null

copiale-v2-0037

P3 S3 K0 X7 G6 X2 A2 A9 K7 S3 C4 Q6 I8 P3 P9 B1 B2 L5 Q6 I8 V4 S7 C4 P9 P3

SICUT PATRIBUS SIT DEUS NOBIS

copiale

substitution

{ "type": "keyword", "value": "MASONIC" }

advanced

en

50

74

cipher_museum

2.0

public

null

cda-0009536

DOIN PYIT MHCT BONF HLEO YMDR AEUO TSNS SEAT RTSC CCOA RIEN TESA CYTN FIPA CERS CHLT OUSN ICWU XXRH IOWE

DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS

stager_route

null

{ "cols": 12 }

hard

en

84

synthetic_educational

null

[]

affine-vf-0125

EZG RVDM ENTQG JV JQNYZ IZWVMZ BZY GQLG GQZR BLR JZZ RVDM TVVC XVMHJ LYC TEVMNWR RVDM WLGQZM NY QZLAZY

LET YOUR LIGHT SO SHINE BEFORE MEN THAT THEY MAY SEE YOUR GOOD WORKS AND GLORIFY YOUR FATHER IN HEAVEN

affine

substitution

{ "a": 23, "b": 11 }

beginner

en

83

102

cipher_museum

2.0

public

null

four-square-094

SFITENKRSRGFMWEEHOBDCVIAEAKDUUHOMVPZIBFUOUUEPY

THE REPORTS OF MY DEATH HAVE BEEN GREATLY EXAGGERATED

four_square

polygraphic

{ "key1": "CIPHER", "key2": "MUSEUM" }

advanced

en

46

cipher_museum

0.2

public

null

chaocipher-v3-0484

GOWQGOPLYLLHKTMPERFHFHWSYHNMZDJHCGXFGTTWDTQWNUPLJOVUBSZPWPHZXKRIWIHUPKGELOO

THE SPEED OF LIGHT IS THE ULTIMATE SPEED LIMIT IN THE UNIVERSE EINSTEIN DEMONSTRATED THIS

chaocipher

machine

{ "type": "keyword", "value": "TRIUMPH" }

advanced

en

75

cipher_museum

2.0

public

null

cda-0005978

QZTAS HOSBQ DAZTA SHOXA KNYKB LZKGK FHPGK GZJHR KLZHO KAGGK LYAZD ELRSZ JGGOP YRQWK DKGDK QYBQK AGLAY DZBED OKWZX ZQLZH OKALP JWZBK GSHPR EWZYG GNYSA KCZDO DASBG HPGZD ZPB

DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION

monoalphabetic

null

{ "alphabet": "SWLQKXTOZMVRJBPHNAGDYUCFEI" }

hard

en

143

synthetic_educational

null

[ "frequency_analysis", "pattern_words", "hill_climbing_lm" ]

Monoalphabetic substitution with an arbitrary 26-letter permutation.

cda-0018205

1.4.4 18.4.5 7.5.5 14.5.6 1.6.4 18.5.7 15.4.1 13.2.1 9.5.10 9.5.2 17.4.4 20.6.5 3.6.7 5.5.6 7.6.3 5.5.10 20.4.1 2.5.8 13.3.6 10.3.10 4.1.2 14.4.3 8.4.6 8.4.10 16.6.3 20.4.7 16.5.7 18.5.3 13.1.1 19.2.3 16.5.1 11.5.7 18.1.6 17.4.4 4.1.4 11.2.6 12.6.4 17.2.7 18.2.1 12.4.3 1.5.10 13.3.9 11.1.1 6.1.2 2.4.1 15.5.4 13.6.10 20...

THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS

arnold_andre

null

{}

hard

en

145

synthetic_educational

null

[ "book_cipher_attack", "triple_index_search" ]

Arnold-André book cipher: coordinates (page.section.word) referencing a shared text.