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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
purple-v3-0309 | ZGJCIDYOWSLEVMBIYEJQZDTLATCHCPGNMSRGXUZXPTVWLUYAQEPJJAEUSJHULGOORBQRPJFPYTRYECYTDSLPOOVVCTPOVBODIVZRYGVODUJCLVVMMBHWMQAPTRAOBOOYJAFROISSCBYXPJQPYTWBYJSJDURPQYSEUEHJ | ZGJCIDYOWSLEVMBIYEJQZDTLATCHCPGNMSRGXUZXPTVWLUYAQEPJJAEUSJHULGOORBQRPJFPYTRYECYTDSLPOOVVCTPOVBODIVZRYGVODUJCLVVMMBHWMQAPTRAOBOOYJAFROISSCBYXPJQPYTWBYJSJDURPQYSEUEHJ | IN THE SEVENTEENTH CENTURY ISAAC NEWTON SYNTHESIZED THE WORK OF COPERNICUS GALILEO AND KEPLER INTO A UNIFIED THEORY OF GRAVITATION THAT EXPLAINED BOTH THE FALL OF APPLES AND THE ORBITS OF PLANETS | purple | purple | machine | {
"type": "seed",
"value": "SAKURA"
} | expert | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
slidex-v2-0252 | MHSSNALMCZLMDAOCXBMQMZJKCUILHTFFHDAILGFFSNEHUCXJXRURKGGDRXILWSAOTADBDSNXDOHTCJUCRNDZJKKMJVAVPEYEMQJTOUYRHDQDAIOCLVRYRXHDVNZKNAOUEHIJSSVDYTASHMMHNPHISAYACACXUCSSMMYPHBHTTBLGPTIOAIQQ | MHSSNALMCZLMDAOCXBMQMZJKCUILHTFFHDAILGFFSNEHUCXJXRURKGGDRXILWSAOTADBDSNXDOHTCJUCRNDZJKKMJVAVPEYEMQJTOUYRHDQDAIOCLVRYRXHDVNZKNAOUEHIJSSVDYTASHMMHNPHISAYACACXUCSSMMYPHBHTTBLGPTIOAIQQ | WE THE PEOPLE OF THE UNITED STATES IN ORDER TO FORM A MORE PERFECT UNION ESTABLISH JUSTICE INSURE DOMESTIC TRANQUILITY PROVIDE FOR THE COMMON DEFENSE PROMOTE THE GENERAL WELFARE AND SECURE THE BLESSINGS OF LIBERTY | slidex | slidex | transposition | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 180 | 180 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v3-0806 | ALEXITHTEICDLNCNIOITNEAGEEATECEITDOTHFOUNOPEOSTNRWMFABDPAOGMIEACLHRWSAONTGFU | ALEXITHTEICDLNCNIOITNEAGEEATECEITDOTHFOUNOPEOSTNRWMFABDPAOGMIEACLHRWSAONTGFU | THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
two-square-v3-0042 | HKRGCQHDME | HKRGCQHDME | DOT DASH DOT | two_square | two_square | polygraphic | {
"key1": "PALACE",
"key2": "BATTLE"
} | advanced | en | 10 | 10 | cipher_museum | 2.0 | public | null | null |
zimmermann-v3-0016 | 99999 90000 90017 90002 90007 90004 90017 90018 99998 00003 00000 99999 90022 90000 90011 90011 90018 99998 | 99999 90000 90017 90002 90007 90004 90017 90018 99998 00003 00000 99999 90022 90000 90011 90011 90018 99998 | ARCHERS TO THE WALLS | zimmermann | zimmermann | codebook | {
"type": "none",
"value": null
} | expert | en | 90 | 107 | cipher_museum | 2.0 | public | null | null |
cda-0010806 | OSNEC PMDSC EUOOY LRXMA TXNEI INXSO AXRAR KNRXN URDTL OSI | OSNEC PMDSC EUOOY LRXMA TXNEI INXSO AXRAR KNRXN URDTL OSI | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | double_transposition | double_transposition | null | {
"key1": "MUSEUM",
"key2": "SIGNAL"
} | medium | en | 48 | 48 | synthetic_educational | null | null | [] | |
alberti-disk-v3-0427 | UDSOGYKGQCTDLHYNQBS | UDSOGYKGQCTDLHYNQBS | AVE MARIA GRATIA PLENA | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 11
} | expert | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
trifid-v2-0535 | P+YGVTPIHHUM | P+YGVTPIHHUM | VENI VIDI VICI | trifid | trifid | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
cda-0013527 | -.-. .- . ... .- .-. / ... .... .. ..-. - . -.. / - .... . / .- .-.. .--. .... .- -... . - / -... -.-- / - .... .-. . . / .--. --- ... .. - .. --- -. ... / ..-. .-. .. . -.. -- .- -. / . ... - .. -- .- - . -.. / -.- . -.-- / .-.. . -. --. - .... / ..-. .-. --- -- / ... - .- - .. ... - .. -.-. ... / . -. - .-. --- .--. ... | -.-. .- . ... .- .-. / ... .... .. ..-. - . -.. / - .... . / .- .-.. .--. .... .- -... . - / -... -.-- / - .... .-. . . / .--. --- ... .. - .. --- -. ... / ..-. .-. .. . -.. -- .- -. / . ... - .. -- .- - . -.. / -.- . -.-- / .-.. . -. --. - .... / ..-. .-. --- -- / ... - .- - .. ... - .. -.-. ... / . -. - .-. --- .--. ... | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION | morse_code | morse_code | null | {} | hard | en | 121 | 121 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
cda-0003226 | DIMXYOZDBXVUZTHHRYIMDLNGGZHAPRXSIVIVWNIWXMQBEMKMTCMHWIIAQBFVPCXVQEGHGWHOZGXSGCPZOXGFPQVXJYVSTCSFEFUGELLUAXJECUBTHGYOACMQKAYLESFYIVLCOUKBXPE | DIMXYOZDBXVUZTHHRYIMDLNGGZHAPRXSIVIVWNIWXMQBEMKMTCMHWIIAQBFVPCXVQEGHGWHOZGXSGCPZOXGFPQVXJYVSTCSFEFUGELLUAXJECUBTHGYOACMQKAYLESFYIVLCOUKBXPE | ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS | autokey | autokey | null | {
"primer": "MUSEUM"
} | hard | en | 139 | 139 | synthetic_educational | null | null | [
"running_key_analysis",
"index_of_coincidence"
] | Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack. |
polybius-v3-0020 | 22 34 31 14 21 42 34 32 31 15 11 14 | 22 34 31 14 21 42 34 32 31 15 11 14 | GOLD FROM LEAD | polybius | polybius | substitution | {
"type": "none",
"value": null
} | beginner | en | 24 | 35 | cipher_museum | 2.0 | public | null | null |
red-type-a-v3-0097 | DRIBYWXIYJGAVECEGUGIJKUQMTGAORBOXDHYHAQSIVALVFPYHEVRIXNOJQJBEQINUOJCOTXHECJUWBWQUMAYHOJSPEJBUXFDVUMERCCOXGWLUMARAZMQPNYQCECEFKOTXDDAILJYHRIUMJOHLWAEDJBYQUNIOJC | DRIBYWXIYJGAVECEGUGIJKUQMTGAORBOXDHYHAQSIVALVFPYHEVRIXNOJQJBEQINUOJCOTXHECJUWBWQUMAYHOJSPEJBUXFDVUMERCCOXGWLUMARAZMQPNYQCECEFKOTXDDAILJYHRIUMJOHLWAEDJBYQUNIOJC | THE LORD OUR GOD IS ONE LORD AND THOU SHALT LOVE THE LORD THY GOD WITH ALL THINE HEART AND WITH ALL THY SOUL AND WITH ALL THY MIGHT AND THESE WORDS WHICH I COMMAND THEE THIS DAY SHALL BE IN THINE HEART | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "SAKURA"
} | advanced | en | 159 | 159 | cipher_museum | 2.0 | public | null | null |
purple-v2-0124 | RBKBUJZZHPUPHJZOEBNOGQTOOMVJWHKIAGQTOSUZIWGCXRZSAAEXLQFGZKSPBXSEDAKEDDODDIJXYSVIGSXPNVHSDWPCAIOKKOREUDVLOJNBFXDUKDGUGELQHJRDAIVGHGQPCZHKEXCKGIOUTPRCYTPEPAWDIWMEEBNS | RBKBUJZZHPUPHJZOEBNOGQTOOMVJWHKIAGQTOSUZIWGCXRZSAAEXLQFGZKSPBXSEDAKEDDODDIJXYSVIGSXPNVHSDWPCAIOKKOREUDVLOJNBFXDUKDGUGELQHJRDAIVGHGQPCZHKEXCKGIOUTPRCYTPEPAWDIWMEEBNS | ULTRA INTELLIGENCE DERIVED FROM DECRYPTED GERMAN ENIGMA TRAFFIC INDICATES THAT ENEMY PANZER DIVISIONS ARE CONCENTRATED AT CALAIS CONFIRMING THE DECEPTION OPERATION FORTITUDE HAS SUCCEEDED | purple | purple | machine | {
"type": "seed",
"value": "TOKYO"
} | expert | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
affine-127 | DKXSG JHZZHXQ QXB | DKXSG JHZZHXQ QXB | ABORT MISSION NOW | affine | affine | substitution | {
"a": 7,
"b": 3
} | beginner | en | 15 | 17 | cipher_museum | 0.2 | public | null | null |
noisy-monoalphabetic-telegraph-026 | RDA KMVMGL SLEA R IHAJQ NPLVFEAE MK TKUPAMHMUIAS LJJTKFSMRFLK QYQRAJ FK RDA NSMFFBS | RDA KMVMGL SLEA R IHAJQ NPLVFEAE MK TKUPAMHMUIAS LJJTKFSMRFLK QYQRAJ FK RDA NSMFFBS | THE NAVAJO CODE TALKERS PROVIDED AN UNBREAKABLE COMMUNICATION SYSTEM IN THE PACIFIC | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "MUSEUM"
} | beginner | en | 71 | 83 | cipher_museum | 0.2 | public | null | null |
jn25-v2-0087 | 26180 26191 26180 26193 26199 26100 26197 26188 26193 26186 26180 26193 26183 26186 26194 26197 26183 26194 26193 26102 26184 26191 26182 26187 26192 26180 26193 26181 26100 26188 26191 26199 26199 26187 26184 26181 26194 26192 26181 26184 26199 26194 26180 26199 26199 26180 26182 26190 26199 26187 26184 26186 26184 26... | 26180 26191 26180 26193 26199 26100 26197 26188 26193 26186 26180 26193 26183 26186 26194 26197 26183 26194 26193 26102 26184 26191 26182 26187 26192 26180 26193 26181 26100 26188 26191 26199 26199 26187 26184 26181 26194 26192 26181 26184 26199 26194 26180 26199 26199 26180 26182 26190 26199 26187 26184 26186 26184 26... | ALAN TURING AND GORDON WELCHMAN BUILT THE BOMBE TO ATTACK THE GERMAN ENIGMA CIPHER MACHINE | jn25 | jn25 | codebook | {
"type": "additive",
"value": "16180"
} | expert | en | 380 | 455 | cipher_museum | 2.0 | public | null | null |
caesar-v3-1188 | LZW JSADOSQ SJJANWK | LZW JSADOSQ SJJANWK | THE RAILWAY ARRIVES | caesar | caesar | substitution | {
"type": "shift",
"value": 18
} | beginner | en | 17 | 19 | cipher_museum | 2.0 | public | null | null |
kryha-v2-0310 | PBSMXHRETXRLQFSNRZFHEFWRNRIQQMAOCSHVRDTIXZQIAMMMXIRKJNMGNKIPWLXVHPXN | PBSMXHRETXRLQFSNRZFHEFWRNRIQQMAOCSHVRDTIXZQIAMMMXIRKJNMGNKIPWLXVHPXN | NEVER IN THE FIELD OF HUMAN CONFLICT WAS SO MUCH OWED BY SO MANY TO SO FEW BRAVE SOULS | kryha | kryha | machine | {
"type": "keyword",
"value": "PRAGUE"
} | expert | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
jn25-v2-0244 | 09999 09900 09900 09995 09999 09919 09900 09997 09907 09992 09997 09910 09997 09992 09993 09992 09997 09902 09908 09903 09908 09996 09906 09993 09993 09904 09999 09906 09908 09907 09903 09902 09993 09903 09994 09911 09996 09997 09991 09996 09908 09996 09993 09990 09993 09900 09995 09999 09993 09997 09902 09996 09999 09... | 09999 09900 09900 09995 09999 09919 09900 09997 09907 09992 09997 09910 09997 09992 09993 09992 09997 09902 09908 09903 09908 09996 09906 09993 09993 09904 09999 09906 09908 09907 09903 09902 09993 09903 09994 09911 09996 09997 09991 09996 09908 09996 09993 09990 09993 09900 09995 09999 09993 09997 09902 09996 09999 09... | ALL GAUL IS DIVIDED INTO THREE PARTS ONE OF WHICH THE BELGAE INHABIT THE AQUITANI ANOTHER AND THE THIRD THOSE WHO IN THEIR OWN LANGUAGE ARE CALLED CELTS IN OURS GAULS | jn25 | jn25 | codebook | {
"type": "additive",
"value": "99999"
} | expert | en | 680 | 815 | cipher_museum | 2.0 | public | null | null |
cda-0011880 | NGEN AFCN ERAG GBBY FUBH YQFU BJVG FERN FBAV ATGE NAFC BFVG VBAP VCUR EFER NEEN ATRY RGGR EFJV GUBH GFHO FGVG HGVB AVAQ RKBS PBVA PVQR APRZ RNFH ERFY RGGR ESER DHRA PLQV FGEV OHGV BAFH OFGV GHGV BAPV CURE FZNC RNPU YRGG REGB NQVS SRER AGYR GGRE | NGEN AFCN ERAG GBBY FUBH YQFU BJVG FERN FBAV ATGE NAFC BFVG VBAP VCUR EFER NEEN ATRY RGGR EFJV GUBH GFHO FGVG HGVB AVAQ RKBS PBVA PVQR APRZ RNFH ERFY RGGR ESER DHRA PLQV FGEV OHGV BAFH OFGV GHGV BAPV CURE FZNC RNPU YRGG REGB NQVS SRER AGYR GGRE | A TRANSPARENT TOOL SHOULD SHOW ITS REASONING TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 196 | 196 | synthetic_educational | null | null | [] | |
kryptos-v2-0038 | MOMUCTFQMYGHLQHHNTAVFE | MOMUCTFQMYGHLQHHNTAVFE | FLEET ASSEMBLES AT HARBOR | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "SHADOW"
} | advanced | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
trifid-v2-0539 | IVRCUOPVEUJL | IVRCUOPVEUJL | IN GOD WE TRUST | trifid | trifid | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
red-type-a-v3-0030 | DOPOCEATGYDDAYLNUCMAMIVXOBEEX | DOPOCEATGYDDAYLNUCMAMIVXOBEEX | TAXATION WITHOUT REPRESENTATION | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "SAKURA"
} | advanced | en | 29 | 29 | cipher_museum | 2.0 | public | null | null |
cda-0008037 | QVTEN CUNAQ GEVTE NCUSE RDHRA PVRFR KCBFR FVZCY RPVCU REFNF GEBAT PYNVZ ARRQF FGEBA TRIVQ RAPRZ BQREA RAPEL CGVBA VFABG OEBXR AOLYR GGRES ERDHR APL | QVTEN CUNAQ GEVTE NCUSE RDHRA PVRFR KCBFR FVZCY RPVCU REFNF GEBAT PYNVZ ARRQF FGEBA TRIVQ RAPRZ BQREA RAPEL CGVBA VFABG OEBXR AOLYR GGRES ERDHR APL | DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS A STRONG CLAIM NEEDS STRONG EVIDENCE MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 123 | 123 | synthetic_educational | null | null | [] | |
cda-0021561 | 19 21 2 19 20 9 20 21 20 9 15 14 3 9 16 8 5 18 19 13 1 16 5 1 3 8 12 5 20 20 5 18 20 15 1 4 9 6 6 5 18 5 14 20 12 5 20 20 5 18 20 8 5 20 18 9 20 8 5 13 9 21 19 3 9 16 8 5 18 1 4 22 1 14 3 5 19 20 8 5 1 12 16 8 1 2 5 20 2 25 15 14 5 16 15 19 9 20 9 15 14 5 1 3 8 12 5 20 20 5 18 6 1 9 12 3 12 15 19 5 4 9 19 1 16 15 19 20... | 19 21 2 19 20 9 20 21 20 9 15 14 3 9 16 8 5 18 19 13 1 16 5 1 3 8 12 5 20 20 5 18 20 15 1 4 9 6 6 5 18 5 14 20 12 5 20 20 5 18 20 8 5 20 18 9 20 8 5 13 9 21 19 3 9 16 8 5 18 1 4 22 1 14 3 5 19 20 8 5 1 12 16 8 1 2 5 20 2 25 15 14 5 16 15 19 9 20 9 15 14 5 1 3 8 12 5 20 20 5 18 6 1 9 12 3 12 15 19 5 4 9 19 1 16 15 19 20... | SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER FAIL CLOSED IS A POSTURE NOT A SLOGAN ALWAYS | aeneas_tacticus | aeneas_tacticus | null | {} | hard | en | 147 | 147 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
cardano-autokey-v3-0053 | UPHVZRBHRCXUFKAHGHTNONALSILMXVUCPUFUXBRWSSLALFPBUVAYQVZKJHRUWHCYRLEVTDNZV | UPHVZRBHRCXUFKAHGHTNONALSILMXVUCPUFUXBRWSSLALFPBUVAYQVZKJHRUWHCYRLEVTDNZV | I HAVE NOT YET BEGUN TO FIGHT SAID JOHN PAUL JONES AS THE BONHOMME RICHARD TOOK HEAVY FIRE | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "MILAN"
} | advanced | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
hill-v3-0034 | TXXAREZGNRYONKWXNJ | TXXAREZGNRYONKWXNJ | OLD IRONSIDES HOLDS | hill | hill | polygraphic | {
"a": 3,
"b": 5,
"c": 2,
"d": 9
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
cda-0009255 | LV BZMLLH GTPKPH LTMTJPG L XTRNTH GOOCYLKY PN ARRR AEILNC FEE KEJI THVZA PLJEEK IALFHQ IAUA QY I CWLUYF TBLYPHY | LV BZMLLH GTPKPH LTMTJPG L XTRNTH GOOCYLKY PN ARRR AEILNC FEE KEJI THVZA PLJEEK IALFHQ IAUA QY I CWLUYF TBLYPHY | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN | beaufort | beaufort | null | {
"key": "LIBERTY"
} | hard | en | 92 | 92 | synthetic_educational | null | null | [] | |
nomenclator-046 | 06 15 21 18 19 03 15 18 05 61 19 05 22 05 14 25 05 01 18 19 01 07 15 15 21 18 06 01 20 08 05 18 19 02 18 15 21 07 08 20 06 15 18 20 08 20 08 09 19 14 01 20 09 15 14 | 06 15 21 18 19 03 15 18 05 61 19 05 22 05 14 25 05 01 18 19 01 07 15 15 21 18 06 01 20 08 05 18 19 02 18 15 21 07 08 20 06 15 18 20 08 20 08 09 19 14 01 20 09 15 14 | FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION | nomenclator | nomenclator | nomenclator | {
"type": "none",
"value": null
} | expert | en | 110 | 164 | cipher_museum | 0.2 | public | null | null |
vernam-v2-0157 | QNQPHDHWFIHWUSBPAQTMFCNVEDUJHVKQUBOEPGPFZAXHNNRTOIBGIAXYXUUZWCTZHJGZCSDNSGM | QNQPHDHWFIHWUSBPAQTMFCNVEDUJHVKQUBOEPGPFZAXHNNRTOIBGIAXYXUUZWCTZHJGZCSDNSGM | ARMY OF NORTHERN VIRGINIA SURRENDERS AT APPOMATTOX COURTHOUSE THE WAR IN THE EAST IS OVER | vernam | vernam | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
vigenere-134 | CTAPWCQAIYIKTMPA | CTAPWCQAIYIKTMPA | ALL IS LOST RETREAT | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
cda-0018158 | 44 23 15 31 24 12 42 11 42 54 35 42 15 43 15 42 51 15 43 25 33 34 52 31 15 14 22 15 21 34 42 44 23 15 13 34 32 32 45 33 24 44 54 43 45 12 43 44 24 44 45 44 24 34 33 13 24 35 23 15 42 43 32 11 35 15 11 13 23 31 15 44 44 15 42 44 34 11 14 24 21 21 15 42 15 33 44 31 15 44 44 15 42 35 45 12 31 24 13 24 33 21 42 11 43 44 42... | 44 23 15 31 24 12 42 11 42 54 35 42 15 43 15 42 51 15 43 25 33 34 52 31 15 14 22 15 21 34 42 44 23 15 13 34 32 32 45 33 24 44 54 43 45 12 43 44 24 44 45 44 24 34 33 13 24 35 23 15 42 43 32 11 35 15 11 13 23 31 15 44 44 15 42 44 34 11 14 24 21 21 15 42 15 33 44 31 15 44 44 15 42 35 45 12 31 24 13 24 33 21 42 11 43 44 42... | THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN A STRONG CLAIM NEEDS STRONG EVIDENCE | polybius | polybius | null | {} | hard | en | 165 | 165 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
cda-0013833 | 8 9 19 20 15 18 9 3 1 12 3 9 16 8 5 18 19 1 18 5 20 5 1 3 8 5 18 19 14 15 20 16 18 15 20 5 3 20 9 15 14 | 8 9 19 20 15 18 9 3 1 12 3 9 16 8 5 18 19 1 18 5 20 5 1 3 8 5 18 19 14 15 20 16 18 15 20 5 3 20 9 15 14 | HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION | aeneas_tacticus | aeneas_tacticus | null | {} | medium | en | 41 | 41 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
trifid-059 | TBLLGTRSRFSDHITSEMALXOPLUREZFBVGTEBWQOAEARJQAHRUAETFQKAFJCEFDTBELB+CEDLDJIBYQNTNLT+RXYWNJKXXQQTFSXOFSQRWUDUBRREWNDECUCEHEESSWKMZREFPZHUN+NQJIFFUVRDI | TBLLGTRSRFSDHITSEMALXOPLUREZFBVGTEBWQOAEARJQAHRUAETFQKAFJCEFDTBELB+CEDLDJIBYQNTNLT+RXYWNJKXXQQTFSXOFSQRWUDUBRREWNDECUCEHEESSWKMZREFPZHUN+NQJIFFUVRDI | THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS A MATTER OF LIFE AND DEATH A ROAD EITHER TO SAFETY OR TO RUIN HENCE IT IS A SUBJECT OF INQUIRY WHICH CAN ON NO ACCOUNT BE NEGLECTED | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FELIX"
} | advanced | en | 148 | 148 | cipher_museum | 0.2 | public | null | null |
alberti-disk-292 | CVSYZMZYDUUDGXPNJQWCOSJCBSXPFWNRPWACOZTMTGKVWKFGBQQLHSAVGH | CVSYZMZYDUUDGXPNJQWCOSJCBSXPFWNRPWACOZTMTGKVWKFGBQQLHSAVGH | IN THE BEGINNING WAS THE WORD AND THE WORD WAS WITH GOD AND FULL OF GRACE | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 22
} | expert | en | 58 | 58 | cipher_museum | 0.2 | public | null | null |
playfair-v3-0058 | EGDWHCMHUGPCNBGUDQNBDKPOTYNUOHWPFLCPZNGFPLUGUKHAUGLUMVOZKGUAFDWDZPELWPPMAUXL | EGDWHCMHUGPCNBGUDQNBDKPOTYNUOHWPFLCPZNGFPLUGUKHAUGLUMVOZKGUAFDWDZPELWPPMAUXL | CHARGE OF THE LIGHT BRIGADE INTO THE VALLEY OF DEATH RODE THE SIX HUNDRED BRAVE CAVALIERS | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "PALACE"
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
trifid-173 | FNTGIESIEBSWAVQEXFJOIFR+MFOBBTG+CXSGCZFYFSEYREPSOHENISOCERGI | FNTGIESIEBSWAVQEXFJOIFR+MFOBBTG+CXSGCZFYFSEYREPSOHENISOCERGI | LET JUSTICE BE DONE THOUGH THE HEAVENS FALL AND THE STARS GO DARK FOREVER | trifid | trifid | fractionation | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
cda-0020186 | SHUS HDZE HWOL LACH EENO DAIH MAEA KHAG AHTH ANZI ETKI NDIB EHTH ANZI ELIN DZEH GAHD ZEHM OASI TKIN CLAG IAIH GAHA KHAM OASI WOLL ACHE EDIB EHYA ZZIE AKHA MAEA KEHD IGLI NITK INAH JAHD ZEHT SAHD ZEHG AHDZ EHWO LLAC HEET SAHB EBED ZEHM OASI GAH | SHUS HDZE HWOL LACH EENO DAIH MAEA KHAG AHTH ANZI ETKI NDIB EHTH ANZI ELIN DZEH GAHD ZEHM OASI TKIN CLAG IAIH GAHA KHAM OASI WOLL ACHE EDIB EHYA ZZIE AKHA MAEA KEHD IGLI NITK INAH JAHD ZEHT SAHD ZEHG AHDZ EHWO LLAC HEET SAHB EBED ZEHM OASI GAH | BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF FAIL CLOSED IS A POSTURE NOT A SLOGAN EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | navajo_code | navajo_code | null | {} | hard | en | 195 | 195 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
one-time-pad-v3-0014 | LPYHVYNLLAKHNEWSWV | LPYHVYNLLAKHNEWSWV | LOWER THE DRAWBRIDGE | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "ABCDEFGH (repeating)"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
slidex-144 | DLNDVSKBHP | DLNDVSKBHP | TRUST NO ONE | slidex | slidex | transposition | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 10 | 10 | cipher_museum | 0.2 | public | null | null |
cda-0005939 | PVGJUUEQQSGMETBQDDIBVILRXULKVRJHMLBSMQULIVTALIEFJSQGGECJFTVVNMEYBUKTSTHLQLTULXUPJJLHQSJMGJSDDWZFANTGLNPTSTAKMSHYWZXDBKHGJPBKXHAWGBVRXUMKZISMCTIPLCFIXJSWFFLHFUKSCKIAISLNOWNHLQLTJGVQRJMG | PVGJUUEQQSGMETBQDDIBVILRXULKVRJHMLBSMQULIVTALIEFJSQGGECJFTVVNMEYBUKTSTHLQLTULXUPJJLHQSJMGJSDDWZFANTGLNPTSTAKMSHYWZXDBKHGJPBKXHAWGBVRXUMKZISMCTIPLCFIXJSWFFLHFUKSCKIAISLNOWNHLQLTJGVQRJMG | FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS ATBASH ENCODES BY REVERSING THE ALPHABET THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER | autokey | autokey | null | {
"primer": "KEY"
} | hard | en | 184 | 184 | synthetic_educational | null | null | [
"running_key_analysis",
"index_of_coincidence"
] | Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack. |
cda-0004296 | WTHL GQRQ LRHI GCRB GWRD BKRB VQJH UHGW HVWJ RPJG CQRB ARUT HJWH IWQM DYME | WTHL GQRQ LRHI GCRB GWRD BKRB VQJH UHGW HVWJ RPJG CQRB ARUT HJWH IWQM DYME | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT SLOWLY | monoalphabetic | monoalphabetic | null | {
"alphabet": "GSAVHKPTRNLMCBDUFJQWOXYIEZ"
} | medium | en | 60 | 60 | synthetic_educational | null | null | [
"frequency_analysis",
"pattern_words",
"hill_climbing_lm"
] | Monoalphabetic substitution with an arbitrary 26-letter permutation. |
red-type-a-v3-0325 | GPURISNMOERDOGCEOFHEQ | GPURISNMOERDOGCEOFHEQ | THE CASTLE IS SURROUNDED | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "MIKADO"
} | advanced | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
nihilist-v3-0201 | 36 65 77 26 36 37 45 36 48 57 34 24 38 55 34 55 77 53 36 | 36 65 77 26 36 37 45 36 48 57 34 24 38 55 34 55 77 53 36 | AVE MARIA GRATIA PLENA | nihilist | nihilist | fractionation | {
"polybius": "TRIUMPH",
"keyword": "JUSTICE"
} | advanced | en | 38 | 56 | cipher_museum | 2.0 | public | null | null |
pigpen-v3-0064 | ┌ ┼ ┼• ┼ ┐• ⌐ ¬• ┌• ⌐ ╳ ╳ ┤• ┼• ¬• ┼ ├ ╳ ┬ ┼ ╳ ┬ ┐ ┐• ├ ⌐ ┐• ├• ▽ ┐ ┼• ⌐ ├ ⌐ ┐• ┐ ┼• ┌ ╲ ╳• ┼ ┼ ┌• ⌐ ¬ ┐• ┤• ╲ ╲ ┤ ┐• ⌐ ┼• ¬ ┼ ┤ ┤• ¬• ¬• ┤• ╳• ┐ ┼• ┌ ╳ ┬ ┼ ┴ ┐• ┼ ⌐ ┴• ┤• ╱ ╳ | ┌ ┼ ┼• ┼ ┐• ⌐ ¬• ┌• ⌐ ╳ ╳ ┤• ┼• ¬• ┼ ├ ╳ ┬ ┼ ╳ ┬ ┐ ┐• ├ ⌐ ┐• ├• ▽ ┐ ┼• ⌐ ├ ⌐ ┐• ┐ ┼• ┌ ╲ ╳• ┼ ┼ ┌• ⌐ ¬ ┐• ┤• ╲ ╲ ┤ ┐• ⌐ ┼• ¬ ┼ ┤ ┤• ¬• ¬• ┤• ╳• ┐ ┼• ┌ ╳ ┬ ┼ ┴ ┐• ┼ ⌐ ┴• ┤• ╱ ╳ | GENERAL PATTON LED THE THIRD ARMY IN A DARING SWEEP ACROSS FRANCE FOLLOWING THE BREAKOUT | pigpen | pigpen | substitution | {
"type": "none",
"value": null
} | beginner | en | 102 | 175 | cipher_museum | 2.0 | public | null | null |
nihilist-160 | 36 67 34 53 57 25 62 67 27 56 57 33 33 40 43 62 30 43 32 40 43 53 59 56 33 36 27 73 57 52 73 56 24 56 46 23 35 40 44 52 56 53 43 59 24 55 47 52 36 56 24 76 47 52 44 | 36 67 34 53 57 25 62 67 27 56 57 33 33 40 43 62 30 43 32 40 43 53 59 56 33 36 27 73 57 52 73 56 24 56 46 23 35 40 44 52 56 53 43 59 24 55 47 52 36 56 24 76 47 52 44 | TO BE OR NOT TO BE THAT IS THE QUESTION WHETHER TIS NOBLER IN THE MIND | nihilist | nihilist | fractionation | {
"polybius": "SECRET",
"keyword": "AGENTS"
} | advanced | en | 110 | 164 | cipher_museum | 0.2 | public | null | null |
fractionated-morse-271 | TSCBKPBYLCSCSLGRWCAYMKEAOAQYRAOIYESGMOYILLEQYKBALGBPQAQWBYBFOLLE | TSCBKPBYLCSCSLGRWCAYMKEAOAQYRAOIYESGMOYILLEQYKBALGBPQAQWBYBFOLLE | WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "CRYPTIC"
} | advanced | en | 64 | 64 | cipher_museum | 0.2 | public | null | null |
hill-v2-0150 | OXSYZVZCJODAUIDO | OXSYZVZCJODAUIDO | THE WALLS HAVE EARS | hill | hill | polygraphic | {
"a": 5,
"b": 7,
"c": 2,
"d": 9
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
kl7-v3-0195 | QFELBWABUDPDROCAXDZJMPIQFMUWYJKTHPQVRTAPXJRARTRZOTNCSWVUNDFXKQRQMDNIMVUWDKMNORYPTU | QFELBWABUDPDROCAXDZJMPIQFMUWYJKTHPQVRTAPXJRARTRZOTNCSWVUNDFXKQRQMDNIMVUWDKMNORYPTU | ZERO KNOWLEDGE PROOFS ALLOW ONE PARTY TO PROVE KNOWLEDGE WITHOUT REVEALING THE KNOWLEDGE ITSELF | kl7 | kl7 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
cda-0018274 | ⟨a13⟩ ⟨w20⟩ ⟨w20⟩ ⟨a19⟩ ⟨a19⟩ ⟨w20⟩ ⟨a31⟩ ⟨w32⟩ ⟨w20⟩ ⟨w34⟩ ⟨w08⟩ ⟨a07⟩ ⟨a17⟩ ⟨a19⟩ ⟨w20⟩ ⟨a13⟩ ⟨a19⟩ ⟨w10⟩ ⟨a17⟩ ⟨w28⟩ ⟨w14⟩ ⟨w32⟩ ⟨a11⟩ ⟨w32⟩ ⟨a01⟩ ⟨w32⟩ ⟨a25⟩ ⟨w40⟩ ⟨w04⟩ ⟨w08⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨w32⟩ ⟨a07⟩ ⟨a19⟩ ⟨w20⟩ ⟨w22⟩ ⟨w20⟩ ⟨w08⟩ ⟨a19⟩ ⟨w14⟩ ⟨a29⟩ ⟨w20⟩ ⟨a31⟩ ⟨w20⟩ ⟨a19⟩ ⟨w40⟩ ⟨w22⟩ ⟨w40⟩ ⟨w22⟩ ⟨a25⟩ ⟨w... | ⟨a13⟩ ⟨w20⟩ ⟨w20⟩ ⟨a19⟩ ⟨a19⟩ ⟨w20⟩ ⟨a31⟩ ⟨w32⟩ ⟨w20⟩ ⟨w34⟩ ⟨w08⟩ ⟨a07⟩ ⟨a17⟩ ⟨a19⟩ ⟨w20⟩ ⟨a13⟩ ⟨a19⟩ ⟨w10⟩ ⟨a17⟩ ⟨w28⟩ ⟨w14⟩ ⟨w32⟩ ⟨a11⟩ ⟨w32⟩ ⟨a01⟩ ⟨w32⟩ ⟨a25⟩ ⟨w40⟩ ⟨w04⟩ ⟨w08⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨w32⟩ ⟨a07⟩ ⟨a19⟩ ⟨w20⟩ ⟨w22⟩ ⟨w20⟩ ⟨w08⟩ ⟨a19⟩ ⟨w14⟩ ⟨a29⟩ ⟨w20⟩ ⟨a31⟩ ⟨w20⟩ ⟨a19⟩ ⟨w40⟩ ⟨w22⟩ ⟨w40⟩ ⟨w22⟩ ⟨a25⟩ ⟨w... | PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH EVERY SYSTEM NEEDS AN HONEST THREAT MODEL HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION | babington | babington | null | {} | hard | en | 120 | 120 | synthetic_educational | null | null | [
"nomenclator_frequency",
"symbol_mapping"
] | Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot. |
m209-251 | AWDRVZPXOREOM | AWDRVZPXOREOM | CHANGE OF PLANS | m209 | m209 | machine | {
"type": "seed",
"value": "ENIGMA"
} | expert | en | 13 | 13 | cipher_museum | 0.2 | public | null | null |
jefferson-disk-v3-0089 | VVDZTRVWWDJIKHIPJQGERDKQXKHFUUZZXTZJQFZLJRAOHSMWLKVDMEWTTDKQUHBMPRSEZDBINKCRUFVFJZE | VVDZTRVWWDJIKHIPJQGERDKQXKHFUUZZXTZJQFZLJRAOHSMWLKVDMEWTTDKQUHBMPRSEZDBINKCRUFVFJZE | RSA ENCRYPTION RELIES ON THE MATHEMATICAL DIFFICULTY OF FACTORING THE PRODUCT OF TWO LARGE PRIMES | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "4,2,6,1,3,5"
} | expert | en | 83 | 83 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0463 | SBACCQTKTWHBRPZKTKLFEWCQRTGMPKGLBVEQQUGSZHALSBKQRZEIHHFDGIONPULUSBKQRZEIRODDESFUHRIQDZRSXQXQUNLHDZCQGDGWATSLLAIAALGAKCRSRSOFGMFNLPRPZKPNHULVTPNUPAMQLURFGSEIGQIQDZDDLESQUURPGSSX | SBACCQTKTWHBRPZKTKLFEWCQRTGMPKGLBVEQQUGSZHALSBKQRZEIHHFDGIONPULUSBKQRZEIRODDESFUHRIQDZRSXQXQUNLHDZCQGDGWATSLLAIAALGAKCRSRSOFGMFNLPRPZKPNHULVTPNUPAMQLURFGSEIGQIQDZDDLESQUURPGSSX | THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS BETWEEN THOSE WHO MAKE CODES AND THOSE WHO BREAK THEM FOR EVERY SYSTEM DEVISED BY A CUNNING ENCIPHERER A PATIENT CRYPTANALYST HAS FOUND A METHOD TO REVEAL ITS SECRETS | four_square | four_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 176 | 176 | cipher_museum | 2.0 | public | null | null |
nomenclator-v2-0127 | 60 04 09 05 09 19 03 01 19 20 | 60 04 09 05 09 19 03 01 19 20 | THE DIE IS CAST | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "PALACE"
} | expert | en | 20 | 29 | cipher_museum | 2.0 | public | null | null |
slidex-v2-0188 | SSCKFFOHGEABOCBLASOHCBHMPHDMJAIQOCSNTSSSDZPTMZFNGDFCUCYTLOJKCCILJRJKYETMCUASUP | SSCKFFOHGEABOCBLASOHCBHMPHDMJAIQOCSNTSSSDZPTMZFNGDFCUCYTLOJKCCILJRJKYETMCUASUP | THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME LIE DOWN IN GREEN PASTURES BY STILL WATERS | slidex | slidex | transposition | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v2-1207 | SOIATTOPMYYDHETHGGETTTEICGGIIRETGUAEEFNDTANAEOFEETTEESDEISRNTREASNTSAEVRD | SOIATTOPMYYDHETHGGETTTEICGGIIRETGUAEEFNDTANAEOFEETTEESDEISRNTREASNTSAEVRD | THE SECRET OF GETTING AHEAD IS GETTING STARTED ONE STEP AT A TIME GETS YOU VERY FAR INDEED | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v2-0022 | PIIKKISGHTANDWLV | PIIKKISGHTANDWLV | DIVIDE AND CONQUER | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "MANCHESTER"
} | intermediate | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0006356 | DRSF ESJVSK ONR ESDEARHQWPWZVFM ZOHGSF VN FRESODQU FVR ASFEOTS KOE VVRRRN PHF BBF GRQIES NESEHSBNK OAOZLEWF QOA DSISOY ISOY QVBVRDG FSQHDWGK QYOWZE GUAIYR PR FSFFSQ GBQSF FQFHFWAK | DRSF ESJVSK ONR ESDEARHQWPWZVFM ZOHGSF VN FRESODQU FVR ASFEOTS KOE VVRRRN PHF BBF GRQIES NESEHSBNK OAOZLEWF QOA DSISOY ISOY QVBVRDG FSQHDWGK QYOWZE GUAIYR PR FSFFSQ GBQSF FQFHFWAK | PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH THE MESSAGE WAS HIDDEN BUT NOT SECURE FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY | porta | porta | null | {
"key": "KEY"
} | hard | en | 153 | 153 | synthetic_educational | null | null | [
"kasiski_examination",
"index_of_coincidence"
] | Porta: 13-row table polyalphabetic cipher; reciprocal (encrypt = decrypt). |
cda-0020794 | TURN SHOU SEEN EMYK NOWN AMON GSHO REIS SUES OUTH KNIF EINC UREX TRAX EROX ARRA YMIX EDIN NERN EEDS ABOV ETRA CKIN TELO THER NORT HFOR CEIN CURN ORTH DRIV E | TURN SHOU SEEN EMYK NOWN AMON GSHO REIS SUES OUTH KNIF EINC UREX TRAX EROX ARRA YMIX EDIN NERN EEDS ABOV ETRA CKIN TELO THER NORT HFOR CEIN CURN ORTH DRIV E | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH | 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. |
trifid-v3-0438 | BGXRVTCWQJKSPQSBXS | BGXRVTCWQJKSPQSBXS | DEAD MEN TELL NO TALES | trifid | trifid | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
kl7-v3-0391 | RXKYQRUFUKZATOQSUVYHXNGNKFUGRJQYTWAZREIYIMIWMIVKPCSUGSDXMRSTHRDRQAXHBIECBRZFBDVOVACZ | RXKYQRUFUKZATOQSUVYHXNGNKFUGRJQYTWAZREIYIMIWMIVKPCSUGSDXMRSTHRDRQAXHBIECBRZFBDVOVACZ | SIGNALS INTELLIGENCE OR SIGINT INVOLVES INTERCEPTION AND ANALYSIS OF ELECTRONIC COMMUNICATIONS | kl7 | kl7 | machine | {
"type": "seed",
"value": "ALLIANCE"
} | expert | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
alberti-disk-v2-0123 | UECWPNXLNFOMGSMNZENKWUOANBMZHSBYRAYASDZHJXQBVDELYMYKFPPCLAMNGOODTZMLVGFTJCWWOIIOAEMRMYITWHKROVKEBTTBMYUHCXSEFQLWFMNTUPEIGFZICTRZYRHZQHRSAWIYMZZOLZKWLQSDLCYYPLXELFU | UECWPNXLNFOMGSMNZENKWUOANBMZHSBYRAYASDZHJXQBVDELYMYKFPPCLAMNGOODTZMLVGFTJCWWOIIOAEMRMYITWHKROVKEBTTBMYUHCXSEFQLWFMNTUPEIGFZICTRZYRHZQHRSAWIYMZZOLZKWLQSDLCYYPLXELFU | HEADQUARTERS FIRST ARMY CORPS ORDERS FOR OCTOBER FOURTH NINETEEN EIGHTEEN THE CORPS WILL ATTACK AT ZERO HOUR WITH ALL AVAILABLE FORCES THE OBJECTIVE IS THE RIDGE OVERLOOKING THE ARGONNE FOREST | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 4
} | expert | en | 163 | 163 | cipher_museum | 2.0 | public | null | null |
cda-0010137 | QBABG PBASH FRBOS HFPNG VBAJV GURAP ELCGV BA | QBABG PBASH FRBOS HFPNG VBAJV GURAP ELCGV BA | DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION | rot13 | rot13 | null | {
"shift": 13
} | medium | en | 37 | 37 | synthetic_educational | null | null | [] | |
lorenz-v2-0322 | OBSERVATIONEXPERIMENTANDREASONARETHETHREEPILLARSOFALLSCIENTIFICINQUIRYANDPROGRESS | OBSERVATIONEXPERIMENTANDREASONARETHETHREEPILLARSOFALLSCIENTIFICINQUIRYANDPROGRESS | OBSERVATION EXPERIMENT AND REASON ARE THE THREE PILLARS OF ALL SCIENTIFIC INQUIRY AND PROGRESS | lorenz | lorenz | machine | {
"type": "seed",
"value": "COLOSSUS"
} | expert | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
m209-134 | DRTUKSQKJLZKLYCJ | DRTUKSQKJLZKLYCJ | ALL IS LOST RETREAT | m209 | m209 | machine | {
"type": "seed",
"value": "SECRET"
} | expert | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
red-type-a-v3-0142 | TOEQYXUQVYCYFINYDDU | TOEQYXUQVYCYFINYDDU | MEASURE TWICE CUT ONCE | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "YAMATO"
} | advanced | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
double-transposition-v2-0055 | OXYAOTFTMMRRAROETIASPOATRISSNHDEEEETITRNAWSAURIERTNHTOHUERRCAPVNHIURSGEVONO | OXYAOTFTMMRRAROETIASPOATRISSNHDEEEETITRNAWSAURIERTNHTOHUERRCAPVNHIURSGEVONO | ARMY OF NORTHERN VIRGINIA SURRENDERS AT APPOMATTOX COURTHOUSE THE WAR IN THE EAST IS OVER | double_transposition | double_transposition | transposition | {
"key1": "PALACE",
"key2": "BATTLE"
} | advanced | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
purple-v3-0293 | NQEDJSYTTSYCDQSXRBHWLUFXEAVXWKYZTUJCVWETQNPYIZQXTNVLWORCKJHEIQUWLYHEVBOHXPWYU | NQEDJSYTTSYCDQSXRBHWLUFXEAVXWKYZTUJCVWETQNPYIZQXTNVLWORCKJHEIQUWLYHEVBOHXPWYU | THE POWERS NOT DELEGATED TO THE UNITED STATES BY THE CONSTITUTION ARE RESERVED TO THE STATES | purple | purple | machine | {
"type": "seed",
"value": "SAKURA"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
argenti-v3-0139 | 37 82 83 28 13 33 26 20 70 63 77 26 75 | 37 82 83 28 13 33 26 20 70 63 77 26 75 | THE APPLE FALLS | argenti | argenti | nomenclator | {
"type": "seed",
"value": "PAPAL"
} | expert | en | 26 | 38 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v2-0184 | EMXLDWAWYMHPQZQRWPWTMBPRENNPOHJDJAQTGQURNMFIKGBPRVAAAGBIVEDYMJRVFCNZ | EMXLDWAWYMHPQZQRWPWTMBPRENNPOHJDJAQTGQURNMFIKGBPRVAAAGBIVEDYMJRVFCNZ | NEVER IN THE FIELD OF HUMAN CONFLICT WAS SO MUCH OWED BY SO MANY TO SO FEW BRAVE SOULS | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "RICHMOND"
} | intermediate | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
cda-0021491 | CLASS ICALZ IPHER STEAX HWHYM ODERN SECUR ITYMZ TTERX COLUX NARTR ANSPO SITIO NREAD SCOLU MNSIN KEYOR DERAL WAYSC | CLASS ICALZ IPHER STEAX HWHYM ODERN SECUR ITYMZ TTERX COLUX NARTR ANSPO SITIO NREAD SCOLU MNSIN KEYOR DERAL WAYSC | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER ALWAYS | commercial_code | commercial_code | null | {} | hard | en | 95 | 95 | synthetic_educational | null | null | [
"codebook_frequency",
"five_letter_group_analysis"
] | Commercial code: five-letter groups from a codebook, often ending in X or Z. |
autokey-v3-0339 | YYIGRABTZWRCUCTKLGIM | YYIGRABTZWRCUCTKLGIM | THE COMPASS POINTS TRUE | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "FREEDOM"
} | intermediate | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
trifid-vg-0017 | +FTOTTQYPF+ITTBQUIOBXBRDFJTQRNNPHJHSMJTEBNCMIIZWKAAUJQAOVNTUTRBTFFC | +FTOTTQYPF+ITTBQUIOBXBRDFJTQRNNPHJHSMJTEBNCMIIZWKAAUJQAOVNTUTRBTFFC | LOVE IS PATIENT LOVE IS KIND IT DOES NOT ENVY IT DOES NOT BOAST IT IS NOT PROUD AT ALL | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FELIX"
} | advanced | en | 67 | 67 | cipher_museum | 2.0 | public | null | null |
cda-0007721 | AFCEP SNFTT CTNII RLAEU IOHTA NPAIL ANOEL EFEHP EIRCN AER | AFCEP SNFTT CTNII RLAEU IOHTA NPAIL ANOEL EFEHP EIRCN AER | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER | scytale | scytale | null | {
"cols": 4
} | medium | en | 48 | 48 | synthetic_educational | null | null | [] | |
fialka-v2-0076 | NQGLBAXVXQMJBGNGKPFOGBHFVFMXBIRHIXRUHVCRALKJMGKCXEMYORSNUDAAWYPVDNDXRFRMTVOBN | NQGLBAXVXQMJBGNGKPFOGBHFVFMXBIRHIXRUHVCRALKJMGKCXEMYORSNUDAAWYPVDNDXRFRMTVOBN | ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW | fialka | fialka | machine | {
"type": "seed",
"value": "MOSCOW"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
kl7-v3-0070 | FJVRKOGOEVKHOVSPJGWQTXYMJMRBYNLWRJTLJBOPOYRLNJEAIPFJOXSEKFUFWRCJCDCMQWKVQS | FJVRKOGOEVKHOVSPJGWQTXYMJMRBYNLWRJTLJBOPOYRLNJEAIPFJOXSEKFUFWRCJCDCMQWKVQS | GALILEO POINTED HIS TELESCOPE AT THE HEAVENS AND CONFIRMED THAT THE EARTH ORBITS THE SUN | kl7 | kl7 | machine | {
"type": "seed",
"value": "NATO"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
argenti-v2-0270 | 63 16 87 39 75 18 25 33 71 49 44 63 64 | 63 16 87 39 75 18 25 33 71 49 44 63 64 | AWAIT MY SIGNAL | argenti | argenti | nomenclator | {
"type": "seed",
"value": "VATICAN"
} | expert | en | 26 | 38 | cipher_museum | 2.0 | public | null | null |
red-type-a-236 | SOBFYBAONKAIMZZOIBEQUPFTOQAPATUHSALGOVILVOQIVYFAHLUFQUHYIGYBQYXBIFBVUCBYTOOGJIVUNICACKARLPAQDIIWEGUBMIWOPAVOLWMAGIZCIMCYLAHFUKKIRIGORBYPABUKOHFAWFUDY | SOBFYBAONKAIMZZOIBEQUPFTOQAPATUHSALGOVILVOQIVYFAHLUFQUHYIGYBQYXBIFBVUCBYTOOGJIVUNICACKARLPAQDIIWEGUBMIWOPAVOLWMAGIZCIMCYLAHFUKKIRIGORBYPABUKOHFAWFUDY | WE THE PEOPLE OF THE UNITED STATES IN ORDER TO FORM A MORE PERFECT UNION ESTABLISH JUSTICE INSURE DOMESTIC TRANQUILITY PROVIDE FOR THE COMMON DEFENSE PROMOTE THE GENERAL WELFARE | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 149 | 149 | cipher_museum | 0.2 | public | null | null |
geheimschreiber-v3-0102 | VAJCHCXGMHRIHEXEONJAUCWJUGFUEZWRNUEDCGBQAYZZENNASQFEOEFTKZFWJVFFZTLVREUBAEEJGFQCERLCKQCIUJOKWYPECPFITEJOEFYJLSHGHHXQFUKENCYXLUSGEDJQEZWIRHWSAGOMUSRXYPALGFHVWTGVGRHVB | VAJCHCXGMHRIHEXEONJAUCWJUGFUEZWRNUEDCGBQAYZZENNASQFEOEFTKZFWJVFFZTLVREUBAEEJGFQCERLCKQCIUJOKWYPECPFITEJOEFYJLSHGHHXQFUKENCYXLUSGEDJQEZWIRHWSAGOMUSRXYPALGFHVWTGVGRHVB | THE MANHATTAN PROJECT BROUGHT TOGETHER THE GREATEST SCIENTIFIC MINDS OF THE TWENTIETH CENTURY IN A RACE TO BUILD THE ATOMIC BOMB BEFORE NAZI GERMANY COULD DO SO THE EFFORT CHANGED THE WORLD FOREVER | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "BERLIN"
} | expert | en | 165 | 165 | cipher_museum | 2.0 | public | null | null |
cda-0010080 | OAOTS VANQW CUREO CCYVR FONWA NOESH AQGVB AGBSO PUYSG GNEVA RSKBS NBWAQ VQRAQ SZNOF HESFY RGGSE TERDH SAQLQ VFGEW PHGVB A | OAOTS VANQW CUREO CCYVR FONWA NOESH AQGVB AGBSO PUYSG GNEVA RSKBS NBWAQ VQRAQ SZNOF HESFY RGGSE TERDH SAQLQ VFGEW PHGVB A | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION | porta | porta | null | {
"key": "JUSTICE"
} | hard | en | 101 | 101 | synthetic_educational | null | null | [] | |
cda-0019416 | 64 49 24 34 1 63 17 2 15 52 25 3 66 57 58 1 63 88 46 58 48 36 14 33 70 87 59 23 43 48 53 63 72 43 33 11 66 4 63 39 33 21 59 63 88 33 34 11 63 22 23 58 58 33 79 66 23 78 2 15 64 58 23 63 58 26 62 14 87 66 67 66 39 49 60 41 40 82 68 25 23 34 93 99 3 22 43 48 1 58 87 17 | 64 49 24 34 1 63 17 2 15 52 25 3 66 57 58 1 63 88 46 58 48 36 14 33 70 87 59 23 43 48 53 63 72 43 33 11 66 4 63 39 33 21 59 63 88 33 34 11 63 22 23 58 58 33 79 66 23 78 2 15 64 58 23 63 58 26 62 14 87 66 67 66 39 49 60 41 40 82 68 25 23 34 93 99 3 22 43 48 1 58 87 17 | DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH | homophonic | homophonic | null | {} | hard | en | 92 | 92 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
solitaire-v2-0369 | ABRBFRFIEBIQYTLLNAAOUNWFNLXUXLZQNXPVCUZSXHTSROEJVTSITOCIRSFXIHTTBCPVVDCSLQYQWXTGAQBNNFCIIQBTCTIJYQURWNNRESUYGPRBVKKACIADDTUBVAANMYYPSBYCQTRFLOHRSVSQVRBUOYPDTBHCOEJXDONWKOAWAYDVJMM | ABRBFRFIEBIQYTLLNAAOUNWFNLXUXLZQNXPVCUZSXHTSROEJVTSITOCIRSFXIHTTBCPVVDCSLQYQWXTGAQBNNFCIIQBTCTIJYQURWNNRESUYGPRBVKKACIADDTUBVAANMYYPSBYCQTRFLOHRSVSQVRBUOYPDTBHCOEJXDONWKOAWAYDVJMM | FOR I AM PERSUADED THAT NEITHER DEATH NOR LIFE NOR ANGELS NOR PRINCIPALITIES NOR POWERS NOR THINGS PRESENT NOR THINGS TO COME NOR HEIGHT NOR DEPTH NOR ANY OTHER CREATURE SHALL BE ABLE TO SEPARATE US FROM THE LOVE OF GOD | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "PONTIFEX"
} | expert | en | 179 | 179 | cipher_museum | 2.0 | public | null | null |
alberti-disk-v3-0055 | LDGEJWVZHNTKZAMUQIHIOLRZPFLHUMHBIOKJPZAVLWPBVEWRMKYJPNVJYAXPUQZLKXPMGHNYVHSAXF | LDGEJWVZHNTKZAMUQIHIOLRZPFLHUMHBIOKJPZAVLWPBVEWRMKYJPNVJYAXPUQZLKXPMGHNYVHSAXF | SCIENCE WITHOUT RELIGION IS LAME AND RELIGION WITHOUT SCIENCE IS BLIND SAID ALBERT EINSTEIN | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 4
} | expert | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
chaocipher-v2-0119 | DVOFFPLDFACTBOGJKSFOMZPTLNYVBTLZHLHFCYPTAGRBASFOINVJNNNRXQANNVMRCBMEFRRCNTWVNGZONXFLGNYVMCKGDSCXTQJMDGEVOAUGVNJQNZGBBQAXQLXOLNCBJVGAZIYEGOSCYLLBLIPRNVEKIPEELAKYCIVIACJFHPLRSNX | DVOFFPLDFACTBOGJKSFOMZPTLNYVBTLZHLHFCYPTAGRBASFOINVJNNNRXQANNVMRCBMEFRRCNTWVNGZONXFLGNYVMCKGDSCXTQJMDGEVOAUGVNJQNZGBBQAXQLXOLNCBJVGAZIYEGOSCYLLBLIPRNVEKIPEELAKYCIVIACJFHPLRSNX | THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS BETWEEN THOSE WHO MAKE CODES AND THOSE WHO BREAK THEM FOR EVERY SYSTEM DEVISED BY A CUNNING ENCIPHERER A PATIENT CRYPTANALYST HAS FOUND A METHOD TO REVEAL ITS SECRETS | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 175 | 175 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v2-0315 | IWOOSGALTSYMABLHELZPGBEIXKMDIZHPFASQTVASQBEIXZPLMZHZYMPLMSMWVPXTPQWQXIUQPP | IWOOSGALTSYMABLHELZPGBEIXKMDIZHPFASQTVASQBEIXZPLMZHZYMPLMSMWVPXTPQWQXIUQPP | FOR GOD SO LOVED THE WORLD THAT HE GAVE HIS ONLY SON THAT WHOEVER BELIEVES SHALL NOT PERISH | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "DIXIE"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
sigaba-v2-0370 | XOLFIFKSTXOXBOLALGZSDOJLLBJIGOXOAGPUPEZGZUZRMZBVURTIBAROBRWWHTJZKPNGHAEXPQJPWVMGEKMPPHSVVLIGKJRTXVDCSRPRCIANTLFWGJFQONNPCLUQLEVRLYKVUUCB | XOLFIFKSTXOXBOLALGZSDOJLLBJIGOXOAGPUPEZGZUZRMZBVURTIBAROBRWWHTJZKPNGHAEXPQJPWVMGEKMPPHSVVLIGKJRTXVDCSRPRCIANTLFWGJFQONNPCLUQLEVRLYKVUUCB | ALL GAUL IS DIVIDED INTO THREE PARTS ONE OF WHICH THE BELGAE INHABIT THE AQUITANI ANOTHER AND THE THIRD THOSE WHO IN THEIR OWN LANGUAGE ARE CALLED CELTS IN OURS GAULS | sigaba | sigaba | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 136 | 136 | cipher_museum | 2.0 | public | null | null |
playfair-v2-0078 | KCUQUAMQAWNQUCOKTYOHCLTNREHCMHKLUGLOCRNPRLKGNQTLDEWDGYAURLUAUSKPTNCPRLKGPNTACPXL | KCUQUAMQAWNQUCOKTYOHCLTNREHCMHKLUGLOCRNPRLKGNQTLDEWDGYAURLUAUSKPTNCPRLKGPNTACPXL | NATURE IS WRITTEN IN THE LANGUAGE OF MATHEMATICS AND ITS CHARACTERS ARE TRIANGLES AND CIRCLES | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "PALACE"
} | intermediate | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
affine-v2-1056 | OJJ DZY EKLJPU O UDOQY OBP YOGZ SOB IB ZIU DISY TJOWU SOBW TOLDU KB JIHYU QLYOD UDOQY | OJJ DZY EKLJPU O UDOQY OBP YOGZ SOB IB ZIU DISY TJOWU SOBW TOLDU KB JIHYU QLYOD UDOQY | ALL THE WORLDS A STAGE AND EACH MAN IN HIS TIME PLAYS MANY PARTS ON LIFES GREAT STAGE | affine | affine | substitution | {
"a": 9,
"b": 14
} | beginner | en | 68 | 85 | cipher_museum | 2.0 | public | null | null |
rail-fence-it-011 | RSEIRSEEITRRSSEEEITRSEETRSE | RSEIRSEEITRRSSEEEITRSEETRSE | RESISTERE RESISTERE RESISTERE | rail_fence | rail_fence | transposition | {
"type": "shift",
"value": 3
} | intermediate | it | 27 | 27 | cipher_museum | 0.2 | public | null | null |
autokey-de-048 | YSVKQBZIGL | YSVKQBZIGL | GOTT MIT UNS | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "SECRET"
} | intermediate | de | 10 | 10 | cipher_museum | 0.2 | public | null | null |
adfgx-082 | ADGAADXDDFAADGDGDFAGXDGAXDDDAX | ADGAADXDDFAADGDGDFAGXDGAXDDDAX | FORWARD MARCH NOW | adfgx | adfgx | fractionation | {
"polybius": "CIPHER",
"columnar": "MUSEUM"
} | advanced | en | 30 | 30 | cipher_museum | 0.2 | public | null | null |
geez-monastic-145 | FALRHQRAFVBLIRH | FALRHQRAFVBLIRH | SILENCE IS GOLDEN | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
cda-0020460 | BAABA AABBB AABAA BAAAA AAAAA ABAAA ABABA AABAB AABAA ABBAA AAABA AABAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BABAA BAAAA ABAAA BAABA AABAA BAAAB BAABA AABAA BABAB BAABA ABAAA ABBAA AAAAA BABBB ABAAA AABBA BABBB AAAAA AABBA ABBBA AAAAA BAABA BAABA AABAA BAAAA ABBAA AAAAA BAAAB BAABA BAAAA ABBAB ABBAA AABBA AAABA ABABA AA... | BAABA AABBB AABAA BAAAA AAAAA ABAAA ABABA AABAB AABAA ABBAA AAABA AABAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BABAA BAAAA ABAAA BAABA AABAA BAAAB BAABA AABAA BABAB BAABA ABAAA ABBAA AAAAA BABBB ABAAA AABBA BABBB AAAAA AABBA ABBBA AAAAA BAABA BAABA AABAA BAAAA ABBAA AAAAA BAAAB BAABA BAAAA ABBAB ABBAA AABBA AAABA ABABA AA... | THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN A STRONG CLAIM NEEDS STRONG EVIDENCE CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | bacon_cipher | bacon_cipher | null | {} | hard | en | 815 | 815 | 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-105 | 1420735282972765722152492872292312447271201227245020372201287229724506574 | 1420735282972765722152492872292312447271201227245020372201287229724506574 | I HAVE NOT YET BEGUN TO FIGHT SAID THE CAPTAIN TO THE CREW | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "CIPHERMUS"
} | advanced | en | 73 | 73 | cipher_museum | 0.2 | public | null | null |
adfgx-v2-0435 | DGAGGAGADADFDGGFADGDAFXGDFXFFGDFAGFGAAADDGDGFFXGFAFXXGXGGGAGFDXAXDGFGDDGFDGDFFFFAGDFAFAXFAGGGADGDGGGGFADGDGDFGDAFAGDDDAGGAFDGGDDGGADXAGDGGGAXXFFFFGAGDGFGAGAXDADDD | DGAGGAGADADFDGGFADGDAFXGDFXFFGDFAGFGAAADDGDGFFXGFAFXXGXGGGAGFDXAXDGFGDDGFDGDFFFFAGDFAFAXFAGGGADGDGGGGFADGDGDFGDAFAGDDDAGGAFDGGDDGGADXAGDGGGAXXFFFFGAGDGFGAGAXDADDD | FREQUENCY ANALYSIS EXPLOITS THE FACT THAT CERTAIN LETTERS APPEAR FAR MORE OFTEN IN ENGLISH TEXT | adfgx | adfgx | fractionation | {
"polybius": "DRAGON",
"columnar": "THUNDER"
} | advanced | en | 162 | 162 | cipher_museum | 2.0 | public | null | null |
polybius-047 | 24 21 54 34 45 25 33 34 52 12 34 44 23 54 34 45 42 43 15 31 21 11 33 14 54 34 45 42 15 33 15 32 54 54 34 45 33 15 15 14 33 34 44 21 15 11 42 44 23 15 42 15 43 45 31 44 | 24 21 54 34 45 25 33 34 52 12 34 44 23 54 34 45 42 43 15 31 21 11 33 14 54 34 45 42 15 33 15 32 54 54 34 45 33 15 15 14 33 34 44 21 15 11 42 44 23 15 42 15 43 45 31 44 | IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT | polybius | polybius | substitution | {
"type": "none",
"value": null
} | beginner | en | 112 | 167 | cipher_museum | 0.2 | public | null | null |
jefferson-disk-v3-0110 | HFIKJWSZXFKDAKOBQULA | HFIKJWSZXFKDAKOBQULA | THE ALCHEMIST SUCCEEDS | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "6,1,4,2,5,3"
} | expert | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
cda-0018684 | 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 15 51 15 42 54 43 54 43 44 15 32 33 15 15 14 43 11 33 23 34 33 15 43 44 44 23 42 15 11 44 32 34 14 15 31 22 42 34 33 43 21 15 31 14 45 43 15 43 11 14 24 22 24 44 43 15 41 45 15 33 13 15 11 43 44 23 15 42 15 35... | 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 15 51 15 42 54 43 54 43 44 15 32 33 15 15 14 43 11 33 23 34 33 15 43 44 44 23 42 15 11 44 32 34 14 15 31 22 42 34 33 43 21 15 31 14 45 43 15 43 11 14 24 22 24 44 43 15 41 45 15 33 13 15 11 43 44 23 15 42 15 35... | FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS EVERY SYSTEM NEEDS AN HONEST THREAT MODEL GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY | polybius | polybius | null | {} | hard | en | 170 | 170 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
enigma-v2-0846 | INWGYQDWOQDTFLNQRXHWQBZFYIAPPMBZRIKXYCIUENIIFJZQLBMWQQULLNPAWSYRKDWHKFKHTSGT | INWGYQDWOQDTFLNQRXHWQBZFYIAPPMBZRIKXYCIUENIIFJZQLBMWQQULLNPAWSYRKDWHKFKHTSGT | MARY QUEEN OF SCOTS WAS BEHEADED AFTER HER CIPHER LETTERS WERE DECODED BY THOMAS PHELIPPES | enigma | enigma | machine | {
"type": "rotor_start",
"value": "STU"
} | expert | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
cda-0005915 | GUR SBHE FDHNER PVCURE HFRF GJB XRLJBEQ CBYLOVHF FDHNERF GUR XNFVFXV RKNZVANGVBA SVAQF ERCRNGRQ GEVTENZF VA PVCUREGRKG | GUR SBHE FDHNER PVCURE HFRF GJB XRLJBEQ CBYLOVHF FDHNERF GUR XNFVFXV RKNZVANGVBA SVAQF ERCRNGRQ GEVTENZF VA PVCUREGRKG | THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 102 | 102 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
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