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-0020571 | 14 24 21 21 24 15 11 33 14 23 15 31 31 32 11 33 24 33 44 42 34 14 45 13 15 14 35 45 12 31 24 13 25 15 54 13 42 54 35 44 34 22 42 11 35 23 54 24 33 33 24 33 15 44 15 15 33 43 15 51 15 33 44 54 43 24 53 23 24 43 44 34 42 24 13 11 31 13 24 35 23 15 42 43 11 42 15 44 15 11 13 23 15 42 43 33 34 44 35 42 34 44 15 13 44 24 34... | 14 24 21 21 24 15 11 33 14 23 15 31 31 32 11 33 24 33 44 42 34 14 45 13 15 14 35 45 12 31 24 13 25 15 54 13 42 54 35 44 34 22 42 11 35 23 54 24 33 33 24 33 15 44 15 15 33 43 15 51 15 33 44 54 43 24 53 23 24 43 44 34 42 24 13 11 31 13 24 35 23 15 42 43 11 42 15 44 15 11 13 23 15 42 43 33 34 44 35 42 34 44 15 13 44 24 34... | DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION ATBASH ENCODES BY REVERSING THE ALPHABET NEVER | polybius | polybius | null | {} | hard | en | 148 | 148 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
enigma-v2-0402 | OQQNPUQHDNBLDSTO | OQQNPUQHDNBLDSTO | THE WALLS HAVE EARS | enigma | enigma | machine | {
"type": "rotor_start",
"value": "JKL"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
red-type-a-v2-0039 | DEJXUJIUGOYOVJJOZRDWHOJI | DEJXUJIUGOYOVJJOZRDWHOJI | TORPEDO AWAY ALL HANDS BRACE | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "SAKURA"
} | advanced | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
vic-053 | 82938290950828090829184505868282888290518182938290958028182845057908258682903842082828609184829190929184 | 82938290950828090829184505868282888290518182938290958028182845057908258682903842082828609184829190929184 | EVERY SECRET HAS A KEEPER AND EVERY CODE HAS A BREAKER WHO SEEKS THE TRUTH | vic | vic | substitution | {
"type": "keyword",
"value": "SNOWFALL"
} | advanced | en | 104 | 104 | cipher_museum | 0.2 | public | null | null |
caesar-v3-0386 | JU ATZU UZNKXY GY EUA CUARJ NGBK ZNKS JU ATZU EUA ZNOY OY ZNK MURJKT XARK UL GRR XKROMOUTY | JU ATZU UZNKXY GY EUA CUARJ NGBK ZNKS JU ATZU EUA ZNOY OY ZNK MURJKT XARK UL GRR XKROMOUTY | DO UNTO OTHERS AS YOU WOULD HAVE THEM DO UNTO YOU THIS IS THE GOLDEN RULE OF ALL RELIGIONS | caesar | caesar | substitution | {
"type": "shift",
"value": 6
} | beginner | en | 72 | 90 | cipher_museum | 2.0 | public | null | null |
slidex-v3-0008 | VHWRCYFQAXFIOVWR | VHWRCYFQAXFIOVWR | THE SENATE DECREES | slidex | slidex | transposition | {
"type": "keyword",
"value": "BLETCHLEY"
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0015910 | IVPIA DXZKJ IQIOK VPAMF FZARP MCXXT LXEOI YIHVT EZQSV AEVPP TPMAC BILIT UPXMX VVNZI MFAAI QPXBJ IORFI IGZQY BGCGE FEMXM IEGBX JGZRV QSAHW WMJZE GQTYS DFBAS IPAAP YKSCG AMSTI POO | IVPIA DXZKJ IQIOK VPAMF FZARP MCXXT LXEOI YIHVT EZQSV AEVPP TPMAC BILIT UPXMX VVNZI MFAAI QPXBJ IORFI IGZQY BGCGE FEMXM IEGBX JGZRV QSAHW WMJZE GQTYS DFBAS IPAAP YKSCG AMSTI POO | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION | running_key | running_key | null | {} | hard | en | 148 | 148 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
sigaba-v3-0147 | OYFWDRZTAFTJGBYXXJHDQK | OYFWDRZTAFTJGBYXXJHDQK | MESSAGE RECEIVED CLEARLY | sigaba | sigaba | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
cda-0003909 | CSAS XTMY IYRJ DRKP HUKI UOEB LBEB PGGF XLND VETV BZYE Y | CSAS XTMY IYRJ DRKP HUKI UOEB LBEB PGGF XLND VETV BZYE Y | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING | trithemius | trithemius | null | {} | medium | en | 45 | 45 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
fractionated-morse-v2-0505 | MJRDPRSJVGCJX | MJRDPRSJVGCJX | THE DIE IS CAST | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
venona-pad-reuse-v2-0169 | KZFRZAAD2SDVBW7DPBH3LLFCXVQQF4TJVBKYPFKFAOLZCB25M2ATDVB | KZFRZAAD2SDVBW7DPBH3LLFCXVQQF4TJVBKYPFKFAOLZCB25M2ATDVB | BREVITY IS THE SOUL OF WIT AND TEDIOUSNESS THE OUTWARD FLOURISHES | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "LIBERTY"
} | expert | en | 55 | 55 | cipher_museum | 2.0 | public | null | null |
bazeries-v2-0169 | SYMWBXPBYAPOFQJOBUHJNITPBNYPIOQJPOOYQJYAMTUPJFHNOBMQOYA | SYMWBXPBYAPOFQJOBUHJNITPBNYPIOQJPOOYQJYAMTUPJFHNOBMQOYA | BREVITY IS THE SOUL OF WIT AND TEDIOUSNESS THE OUTWARD FLOURISHES | bazeries | bazeries | transposition | {
"type": "integer",
"value": 23
} | advanced | en | 55 | 55 | cipher_museum | 2.0 | public | null | null |
solitaire-v2-0315 | ABRZTIISYXJUYIPWCOYMTYKYCBYWXNWKHYSAIOESTANMGZTKLXHIMFLIGNYHHGPMZBMZWLPJLK | ABRZTIISYXJUYIPWCOYMTYKYCBYWXNWKHYSAIOESTANMGZTKLXHIMFLIGNYHHGPMZBMZWLPJLK | FOR GOD SO LOVED THE WORLD THAT HE GAVE HIS ONLY SON THAT WHOEVER BELIEVES SHALL NOT PERISH | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "PONTIFEX"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-v2-0433 | MDWVLKSIIKTBSEAIIFNAIJSVSTSAMDTAVVATAEMNNJTIKWTXPLGPDWNMDXFBLRSAXFATNNIEINFUANENAEKSMAI | MDWVLKSIIKTBSEAIIFNAIJSVSTSAMDTAVVATAEMNNJTIKWTXPLGPDWNMDXFBLRSAXFATNNIEINFUANENAEKSMAI | ARMY OF NORTHERN VIRGINIA SURRENDERS AT APPOMATTOX COURTHOUSE THE WAR IN THE EAST IS OVER | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 87 | 87 | cipher_museum | 2.0 | public | null | null |
null-cipher-v3-0023 | for uiou long little say and into look after help each at down | for uiou long little say and into look after help each at down | FULL SAIL AHEAD | null_cipher | null_cipher | steganography | {
"type": "position",
"value": "first"
} | advanced | en | 50 | 62 | cipher_museum | 2.0 | public | null | null |
cda-0019527 | Γ ┘· ─ ┘· K r ┘· ─ ⌐· X· X L ┘· ¬ ⌐· X· X r ⌐ K Γ· ┘· ─ ⌒ Γ· K r· L ─ r ┌· ⌒· ┐· K Γ· ┘· ─ | Γ ┘· ─ ┘· K r ┘· ─ ⌐· X· X L ┘· ¬ ⌐· X· X r ⌐ K Γ· ┘· ─ ⌒ Γ· K r· L ─ r ┌· ⌒· ┐· K Γ· ┘· ─ | DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION | pigpen | pigpen | null | {} | easy | en | 14 | 14 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
stager-route-v3-0067 | WAHRDBFKYXIBLIEEVATESOTERNXXGEHIFTFSOORDSEABXXETLANUUNWNCADIHAXXUTXOATDEHTUNUOATX | WAHRDBFKYXIBLIEEVATESOTERNXXGEHIFTFSOORDSEABXXETLANUUNWNCADIHAXXUTXOATDEHTUNUOATX | WATSON WE HAVE FOUND THE STRUCTURE OF DNA AND IT IS A DOUBLE HELIX OF BREATHTAKING BEAUTY | stager_route | stager_route | transposition | {
"type": "integer",
"value": 9
} | expert | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
affine-v2-1250 | KIB AHOQ TZ LN ZIBSIBOQ T ZIJAA WHK RJWK IB LJPBKI LB KH ATB QHRW TW XOBBW SJZKVOBZ IB ABJQBKI LB UBZTQB KIB ZKTAA RJKBOZ IB OBZKHOBKI LN ZHVA IB ABJQBKI LB TW KIB SJKIZ HM OTXIKBHVZWBZZ MHO ITZ WJLB ZJPB | KIB AHOQ TZ LN ZIBSIBOQ T ZIJAA WHK RJWK IB LJPBKI LB KH ATB QHRW TW XOBBW SJZKVOBZ IB ABJQBKI LB UBZTQB KIB ZKTAA RJKBOZ IB OBZKHOBKI LN ZHVA IB ABJQBKI LB TW KIB SJKIZ HM OTXIKBHVZWBZZ MHO ITZ WJLB ZJPB | 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 | affine | affine | substitution | {
"a": 11,
"b": 9
} | beginner | en | 164 | 204 | cipher_museum | 2.0 | public | null | null |
atbash-la-023 | RM KIRMXRKRL VIZG EVIYFN | RM KIRMXRKRL VIZG EVIYFN | IN PRINCIPIO ERAT VERBUM | atbash | atbash | substitution | {
"type": "none",
"value": null
} | beginner | la | 21 | 24 | cipher_museum | 0.2 | public | null | null |
cda-0021425 | 91 17 48 62 33 25 23 21 68 93 79 22 50 60 14 62 49 48 43 63 27 68 25 48 34 81 43 67 33 61 72 34 22 4 2 80 49 99 24 21 30 2 66 4 43 1 96 1 70 60 32 3 93 15 24 67 58 26 80 23 48 99 59 57 4 1 86 49 68 88 21 58 49 67 43 2 81 64 68 17 22 67 76 40 67 22 40 2 35 88 59 15 48 | 91 17 48 62 33 25 23 21 68 93 79 22 50 60 14 62 49 48 43 63 27 68 25 48 34 81 43 67 33 61 72 34 22 4 2 80 49 99 24 21 30 2 66 4 43 1 96 1 70 60 32 3 93 15 24 67 58 26 80 23 48 99 59 57 4 1 86 49 68 88 21 58 49 67 43 2 81 64 68 17 22 67 76 40 67 22 40 2 35 88 59 15 48 | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE | homophonic | homophonic | null | {} | hard | en | 93 | 93 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
copiale-005 | Q7 I8 S5 I5 K0 O6 N2 O0 S9 M5 I5 D8 N8 V5 W5 | Q7 I8 S5 I5 K0 O6 N2 O0 S9 M5 I5 D8 N8 V5 W5 | THE COAST IS CLEAR | copiale | copiale | substitution | {
"type": "keyword",
"value": "COPIALE"
} | advanced | en | 30 | 44 | cipher_museum | 0.2 | public | null | null |
lorenz-v2-0158 | TORPEDOAWAYALLHANDSBRACG | TORPEDOAWAYALLHANDSBRACG | TORPEDO AWAY ALL HANDS BRACE | lorenz | lorenz | machine | {
"type": "seed",
"value": "FISH"
} | expert | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
adfgx-231 | DXGAAXAXDGGAXXXAGGGAFAGGDDDFFG | DXGAAXAXDGGAXXXAGGGAFAGGDDDFFG | ABORT MISSION NOW | adfgx | adfgx | fractionation | {
"polybius": "KEYWORD",
"columnar": "TRAFIC"
} | advanced | en | 30 | 30 | cipher_museum | 0.2 | public | null | null |
adfgx-v3-0290 | GGAAXFDDFAGFGXGGGFDAGGGADXGAAGXG | GGAAXFDDFAGFGXGGGFDAGGGADXGAAGXG | SOUND THE TRUMPETS | adfgx | adfgx | fractionation | {
"polybius": "DRAGON",
"columnar": "THUNDER"
} | advanced | en | 32 | 32 | cipher_museum | 2.0 | public | null | null |
typex-v2-0079 | BGNZVQNIBXZCBTYCPKKUGWUOLYRWTWTDFSSJIGXGXQKGBKEXOBGEDSOUZDYFFIMDOPOYTBIUEFDLTHX | BGNZVQNIBXZCBTYCPKKUGWUOLYRWTWTDFSSJIGXGXQKGBKEXOBGEDSOUZDYFFIMDOPOYTBIUEFDLTHX | NATURE IS WRITTEN IN THE LANGUAGE OF MATHEMATICS AND ITS CHARACTERS ARE TRIANGLES AND CIRCLES | typex | typex | machine | {
"type": "keyword",
"value": "LONDON"
} | expert | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
m94-v2-0217 | JOMTRZBNYLBEKVM | JOMTRZBNYLBEKVM | CAVALRY ADVANCES | m94 | m94 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 15 | 15 | cipher_museum | 2.0 | public | null | null |
trifid-079 | JPSRYVCYLLXDALKN | JPSRYVCYLLXDALKN | NO PRISONERS TAKEN | trifid | trifid | fractionation | {
"type": "keyword",
"value": "CIPHER"
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
cda-0020497 | Γ Γ· ¬· ┌· ⌐ ┐· r· ⌐ ─ Γ K ┌· Γ· ¬· ┌· ⌐ ┐· r· ⌐· ┌· L └· X· L ─ r Γ· L X L ⌣ ┐· ┘· X L X Γ· ┌ ┐· └ L r Γ· ┐· r· L ┌· X r· Γ· └ └ r Γ· ┐· r· L ┌· X· X L X └ Γ· ─ L ⌐ ┌· ⌐ └ ¬· L ¬ ┌· ⌐ K ┘· L ─ r ┌· ⌒· ┐· K ¬ └ ┘· r ┐ X ┘· ⌐· └ L K K L ┌· X K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ r Γ· ┐· r· L ┌· X ┌· L ⌐ ┌· ┌· ⌐ ─ ¬· L └ L K K... | Γ Γ· ¬· ┌· ⌐ ┐· r· ⌐ ─ Γ K ┌· Γ· ¬· ┌· ⌐ ┐· r· ⌐· ┌· L └· X· L ─ r Γ· L X L ⌣ ┐· ┘· X L X Γ· ┌ ┐· └ L r Γ· ┐· r· L ┌· X r· Γ· └ └ r Γ· ┐· r· L ┌· X· X L X └ Γ· ─ L ⌐ ┌· ⌐ └ ¬· L ¬ ┌· ⌐ K ┘· L ─ r ┌· ⌒· ┐· K ¬ └ ┘· r ┐ X ┘· ⌐· └ L K K L ┌· X K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ r Γ· ┐· r· L ┌· X ┌· L ⌐ ┌· ┌· ⌐ ─ ¬· L └ L K K... | DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | pigpen | pigpen | null | {} | hard | en | 84 | 84 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
trifid-v3-0089 | XCASJFDBPIKRXOACUCZKO+AIMDCAMMDPA+SAPTYZIBJBFULZEYDVBLIMIPGVDBFGJDDFLQUDRDUGUGALIJV | XCASJFDBPIKRXOACUCZKO+AIMDCAMMDPA+SAPTYZIBJBFULZEYDVBLIMIPGVDBFGJDDFLQUDRDUGUGALIJV | RSA ENCRYPTION RELIES ON THE MATHEMATICAL DIFFICULTY OF FACTORING THE PRODUCT OF TWO LARGE PRIMES | trifid | trifid | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 83 | 83 | cipher_museum | 2.0 | public | null | null |
adfgvx-v2-0050 | FAFFAFADFAGVAXDDGFAGVDFGGDDDDDDAGDGDAGFGGDAVFDGAFFGVDGVDXFAGVDXVDAFDGFGVDXFDGFDGFFGAGGFGAGAAFFDDFFFFDFFDADDGGAFFDDAGDDDGAFGGFGGFGDVVFAVGGGVDAFAFDFXV | FAFFAFADFAGVAXDDGFAGVDFGGDDDDDDAGDGDAGFGGDAVFDGAFFGVDGVDXFAGVDXVDAFDGFGVDXFDGFDGFFGAGGFGAGAAFFDDFFFFDFFDADDGGAFFDDAGDDDGAFGGFGGFGDVVFAVGGGVDAFAFDFXV | GOOD NIGHT GOOD NIGHT PARTING IS SUCH SWEET SORROW THAT I SHALL SAY GOOD NIGHT TILL MORROW | adfgvx | adfgvx | fractionation | {
"polybius": "PALACE",
"columnar": "BATTLE"
} | advanced | en | 148 | 148 | cipher_museum | 2.0 | public | null | null |
vic-v2-0290 | 18587889487885948475808892491388584349186765785329257918288486383193386301234568848319338638137584 | 18587889487885948475808892491388584349186765785329257918288486383193386301234568848319338638137584 | I KNOW NOT WHAT COURSE OTHERS MAY TAKE BUT AS FOR ME GIVE ME LIBERTY OR GIVE ME DEATH | vic | vic | substitution | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 98 | 98 | cipher_museum | 2.0 | public | null | null |
purple-v2-0300 | PCHLGPGUKYGZOWBEREBHLJEGEECXWWNPTUKYVYSEJULCFOBPINSUCCQBWTVWVCBOQBIW | PCHLGPGUKYGZOWBEREBHLJEGEECXWWNPTUKYVYSEJULCFOBPINSUCCQBWTVWVCBOQBIW | ALL THE WORLDS A STAGE AND EACH MAN IN HIS TIME PLAYS MANY PARTS ON LIFES GREAT STAGE | purple | purple | machine | {
"type": "seed",
"value": "SAKURA"
} | expert | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
chaocipher-213 | DWLMYVAMOORUFSJPNRZHNLMRQEYSLUJEVVUH | DWLMYVAMOORUFSJPNRZHNLMRQEYSLUJEVVUH | THE ONLY THING WE HAVE TO FEAR IS FEAR ITSELF | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 36 | 36 | cipher_museum | 0.2 | public | null | null |
cda-0002113 | TIGD YYUR MHMT BUSG UOLX HYOQ FDKF AZMY NAPN ZWMV BIUO LBNN AIDB LBUV MHGS KRZS QEGI URUA QCUJ MCES PVIH AYQC IXMG HTHJ | TIGD YYUR MHMT BUSG UOLX HYOQ FDKF AZMY NAPN ZWMV BIUO LBNN AIDB LBUV MHGS KRZS QEGI URUA QCUJ MCES PVIH AYQC IXMG HTHJ | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS | trithemius | trithemius | null | {} | hard | en | 96 | 96 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
sigaba-v2-0048 | FKCCLTFRRWEUXNLIBGBNOMJVCNMJDNCLCKSTDRGBINIPHHYOEYWLADEZMHUTYCXNGYAY | FKCCLTFRRWEUXNLIBGBNOMJVCNMJDNCLCKSTDRGBINIPHHYOEYWLADEZMHUTYCXNGYAY | ALL THE WORLDS A STAGE AND EACH MAN IN HIS TIME PLAYS MANY PARTS ON LIFES GREAT STAGE | sigaba | sigaba | machine | {
"type": "seed",
"value": "ECMMARK"
} | expert | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
two-square-v3-0085 | UGEBMPUGDAVSLQADMZUFKZSTDEQGNEPMQMONQMOGCQHFTOCTIONSIHESSDLQUMONLUUGCKLZPECTAH | UGEBMPUGDAVSLQADMZUFKZSTDEQGNEPMQMONQMOGCQHFTOCTIONSIHESSDLQUMONLUUGCKLZPECTAH | THE BIRTHDAY PARADOX SHOWS THAT COLLISIONS IN HASH FUNCTIONS OCCUR FAR SOONER THAN EXPECTED | two_square | two_square | polygraphic | {
"key1": "PALACE",
"key2": "BATTLE"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
cda-0002761 | TCMO QHSE POLK SCTE AYRA OITU LBIH EPIY ARTN DEUB DLYC LNTI EIAR BNHB IEEI ENOT SIBE OXXR IRCT INSW USRF ICAS IPTM HAEF RXXE UALE EHOT SPOD | TCMO QHSE POLK SCTE AYRA OITU LBIH EPIY ARTN DEUB DLYC LNTI EIAR BNHB IEEI ENOT SIBE OXXR IRCT INSW USRF ICAS IPTM HAEF RXXE UALE EHOT SPOD | THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY | stager_route | stager_route | null | {
"cols": 8
} | hard | en | 112 | 112 | synthetic_educational | null | null | [
"column_count_search",
"route_pattern_search"
] | Route (Stager) cipher: write into rectangle, read via alternating column route. |
cda-0014236 | FVHF VFXY GJQD GAGU WOJV XSVH RIZF RSSW YEZQ JXXY FRUR | FVHF VFXY GJQD GAGU WOJV XSVH RIZF RSSW YEZQ JXXY FRUR | MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY | running_key | running_key | null | {} | medium | en | 44 | 44 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
cda-0008513 | EETV EHED RRSE YAAS NTYH MSOO TNDE EEMS LNTX | EETV EHED RRSE YAAS NTYH MSOO TNDE EEMS LNTX | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | scytale | scytale | null | {
"cols": 12
} | medium | en | 36 | 36 | synthetic_educational | null | null | [] | |
fractionated-morse-v2-0514 | DEGSDWEVEPAQALFMVENVEMLG | DEGSDWEVEPAQALFMVENVEMLG | BRIDGE DESTROYED AT DAWN | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
wheatstone-v3-0023 | ASDDOTYDTHRTG | ASDDOTYDTHRTG | FULL SAIL AHEAD | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "TELEGRAPHY"
} | advanced | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
vic-v2-0377 | 842287954911874933213195 | 842287954911874933213195 | KEEP YOUR POWDER DRY | vic | vic | substitution | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
solitaire-v2-0378 | RRTAJUUSCUSEAIPWANPUUIVRJNYIFFGUCKVGLVAVSHSAEHBAYHHTEVNIQFYHIZQMWGFPBZRJVHSMVKCXXMYABGGXIUNPZGIHARZSLNWVUIIFTASYELIVNROOBKTCZCTNFFNCJRYIBMESTSDKSZOHYGKESKNIKOAQOLCWESJQJCDNQCQUURH | RRTAJUUSCUSEAIPWANPUUIVRJNYIFFGUCKVGLVAVSHSAEHBAYHHTEVNIQFYHIZQMWGFPBZRJVHSMVKCXXMYABGGXIUNPZGIHARZSLNWVUIIFTASYELIVNROOBKTCZCTNFFNCJRYIBMESTSDKSZOHYGKESKNIKOAQOLCWESJQJCDNQCQUURH | 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 | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "PONTIFEX"
} | expert | en | 179 | 179 | cipher_museum | 2.0 | public | null | null |
cda-0017138 | .... .... .. ... . ..... . ... . . .... ... .. .... .... ... . ... .. .... . ..... ..... ... . . ... .. .. .... ... ... . . .... .... .. .... ... .... ... ... .. . .. .... ... ... . .... .... ... .... .. . ..... ... ..... . ..... . . .... .... . ..... . .... .... .... .... .. .. ....... | .... .... .. ... . ..... . ... . . .... ... .. .... .... ... . ... .. .... . ..... ..... ... . . ... .. .. .... ... ... . . .... .... .. .... ... .... ... ... .. . .. .... ... ... . .... .... ... .... .. . ..... ... ..... . ..... . . .... .... . ..... . .... .... .... .... .. .. ....... | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT | tap_code | tap_code | null | {} | medium | en | 54 | 54 | 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. |
kl7-v3-0031 | TUCXWLIWVQHHAGHCUUSQT | TUCXWLIWVQHHAGHCUUSQT | SONS OF LIBERTY ASSEMBLE | kl7 | kl7 | machine | {
"type": "seed",
"value": "NATO"
} | expert | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
cda-0015088 | 858 823 814 999 802 862 857 843 832 812 874 999 807 824 847 822 814 853 999 814 871 858 813 840 811 855 999 857 823 813 999 831 814 873 999 867 825 859 821 999 857 822 812 999 846 835 802 825 839 857 812 871 859 999 826 858 855 812 834 817 999 846 844 835 873 801 834 845 823 801 805 812 859 826 806 999 806 824 846 822 ... | 858 823 814 999 802 862 857 843 832 812 874 999 807 824 847 822 814 853 999 814 871 858 813 840 811 855 999 857 823 813 999 831 814 873 999 867 825 859 821 999 857 822 812 999 846 835 802 825 839 857 812 871 859 999 826 858 855 812 834 817 999 846 844 835 873 801 834 845 823 801 805 812 859 826 806 999 806 824 846 822 ... | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE | culper_ring | culper_ring | null | {} | hard | en | 186 | 186 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
rail-fence-v2-0489 | TATITITOCHTLSALFIHUNCONNETEIIETFEEERHEFANLEAVMHEOADROEJICOGDRFPTIRNATTNBNHAETOOOTEDOORCUQCCNOSRTITDRSOESUICEFITESTEAAYIAIHOBWRACAAAHFTTSRWUTANMTEIYN | TATITITOCHTLSALFIHUNCONNETEIIETFEEERHEFANLEAVMHEOADROEJICOGDRFPTIRNATTNBNHAETOOOTEDOORCUQCCNOSRTITDRSOESUICEFITESTEAAYIAIHOBWRACAAAHFTTSRWUTANMTEIYN | 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 | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 10
} | intermediate | en | 148 | 148 | cipher_museum | 2.0 | public | null | null |
cda-0017620 | daral choldaiin kaiiin chedy ykcheol qokal okedy raiin shor ypchol shedy chedy kaiiin qokeedy qotedy | daral choldaiin kaiiin chedy ykcheol qokal okedy raiin shor ypchol shedy chedy kaiiin qokeedy qotedy | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING | voynich_render | voynich_render | null | {} | hard | en | 86 | 86 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
autokey-v3-0600 | ALUCZIVYBGUNGWEAYXLVORGGPRIZLRTMTGKLPZMFUETPZWGBNAGFFHNCECBQAUOTNFRBLOEFABNYGJAMYW | ALUCZIVYBGUNGWEAYXLVORGGPRIZLRTMTGKLPZMFUETPZWGBNAGFFHNCECBQAUOTNFRBLOEFABNYGJAMYW | HUMINT OR HUMAN INTELLIGENCE GATHERING RELIES ON PERSONAL CONTACT AND HUMAN SOURCES IN THE FIELD | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
typex-v3-0058 | KTQQPDEMSUTRFTJNRHQSTVHHNDSYFIILTKCRZEAJTDPHJNLBBWUYSUPJYYITSNQQZZLHUANQRC | KTQQPDEMSUTRFTJNRHQSTVHHNDSYFIILTKCRZEAJTDPHJNLBBWUYSUPJYYITSNQQZZLHUANQRC | THE LIGHT YOU SEE FROM DISTANT STARS LEFT THOSE SUNS THOUSANDS OF YEARS BEFORE YOUR BIRTH | typex | typex | machine | {
"type": "keyword",
"value": "LONDON"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
trifid-243 | DETSTKEEWAUEOODEG | DETSTKEEWAUEOODEG | THE EAGLE HAS LANDED | trifid | trifid | fractionation | {
"type": "keyword",
"value": "TRIFID"
} | advanced | en | 17 | 17 | cipher_museum | 0.2 | public | null | null |
lorenz-v3-0357 | DGUNTOOTHERSASYOUWOULDHAVETHEMTOUNTOYOUTHISISTHEGOLDENZULEOFALLRELIGIONS | DGUNTOOTHERSASYOUWOULDHAVETHEMTOUNTOYOUTHISISTHEGOLDENZULEOFALLRELIGIONS | DO UNTO OTHERS AS YOU WOULD HAVE THEM DO UNTO YOU THIS IS THE GOLDEN RULE OF ALL RELIGIONS | lorenz | lorenz | machine | {
"type": "seed",
"value": "BLETCHLEY"
} | expert | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v3-0222 | MKATG EQT XGWAVGZXRT | MKATG EQT XGWAVGZXRT | LOWER THE DRAWBRIDGE | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "INDIA"
} | intermediate | en | 18 | 20 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-v2-0198 | RLARDAXLQBWLHBLLBARRTAVXSHDVRBPRJPMHFBQPHJWLDXFAMBWLREAQVLMBRTUKJPSALDQRDWLSDB | RLARDAXLQBWLHBLLBARRTAVXSHDVRBPRJPMHFBQPHJWLDXFAMBWLREAQVLMBRTUKJPSALDQRDWLSDB | IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
purple-007 | KUEJRHJPZBSWZEN | KUEJRHJPZBSWZEN | ABORT MISSION NOW | purple | purple | machine | {
"type": "seed",
"value": "PURPLE"
} | expert | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
wallis-cipher-v3-0118 | 90 30 85 67 63 55 91 90 15 44 76 91 90 41 20 18 23 12 55 54 33 82 63 91 | 90 30 85 67 63 55 91 90 15 44 76 91 90 41 20 18 23 12 55 54 33 82 63 91 | LOWER THE DRAWBRIDGE | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "ENGLAND"
} | expert | en | 48 | 71 | cipher_museum | 2.0 | public | null | null |
jefferson-disk-v3-0237 | AWPYKVZBPZYBKDEYNXRJITWAPZUYZRMYQOWTUMBAWHFMOZGVUUBBIXARJFKLAZPMZMQUEZIXXEGYWR | AWPYKVZBPZYBKDEYNXRJITWAPZUYZRMYQOWTUMBAWHFMOZGVUUBBIXARJFKLAZPMZMQUEZIXXEGYWR | SCIENCE WITHOUT RELIGION IS LAME AND RELIGION WITHOUT SCIENCE IS BLIND SAID ALBERT EINSTEIN | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "1,3,5,2,4,6"
} | expert | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v2-0443 | Y PRE VU RFF MJYEKX MJAUOKJ PJAYXM ZJYPJ XMANEKMJNENMJ TN YE NDNAI MAYRF REV MAYQOFRMYUE | Y PRE VU RFF MJYEKX MJAUOKJ PJAYXM ZJYPJ XMANEKMJNENMJ TN YE NDNAI MAYRF REV MAYQOFRMYUE | I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 74 | 88 | cipher_museum | 2.0 | public | null | null |
playfair-es-054 | ALHVGUFUQYTEGSHTALOTGTBVUDME | ALHVGUFUQYTEGSHTALOTGTBVUDME | EN BOCA CERRADA NO ENTRAN MOSCAS | playfair | playfair | substitution | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | es | 28 | 28 | cipher_museum | 0.2 | public | null | null |
caesar-vf-0063 | PDA QJXNAWGWXHA YKZA ATEOPO KJHU EJ PDA IEJZ KB CKZ BKN WHH DQIWJ YELDANO IQOP UEAHZ | PDA QJXNAWGWXHA YKZA ATEOPO KJHU EJ PDA IEJZ KB CKZ BKN WHH DQIWJ YELDANO IQOP UEAHZ | THE UNBREAKABLE CODE EXISTS ONLY IN THE MIND OF GOD FOR ALL HUMAN CIPHERS MUST YIELD | caesar | caesar | substitution | {
"type": "shift",
"value": 22
} | beginner | en | 69 | 84 | cipher_museum | 2.0 | public | null | null |
caesar-v2-1712 | OBZLKKLFQBO QEB BKBJV MLPFQFLK XKA OBMLOQ YXZH YBCLOB KFDEQCXII TFQE X CRII PQOBKDQE ZLRKQ | OBZLKKLFQBO QEB BKBJV MLPFQFLK XKA OBMLOQ YXZH YBCLOB KFDEQCXII TFQE X CRII PQOBKDQE ZLRKQ | RECONNOITER THE ENEMY POSITION AND REPORT BACK BEFORE NIGHTFALL WITH A FULL STRENGTH COUNT | caesar | caesar | substitution | {
"type": "shift",
"value": 23
} | beginner | en | 77 | 90 | cipher_museum | 2.0 | public | null | null |
cda-0008772 | IXLIYHYXYHRK DHJVWGI UOJ WODV CWYYWG YR O NHZZWGWKY CWYYWG | IXLIYHYXYHRK DHJVWGI UOJ WODV CWYYWG YR O NHZZWGWKY CWYYWG | SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER | monoalphabetic | monoalphabetic | null | {
"alphabet": "OLDNWZSVHPECUKRJBGIYXTQAMF"
} | medium | en | 50 | 50 | synthetic_educational | null | null | [] | |
bifid-v2-0133 | SVTVFFSNEGPYLC | SVTVFFSNEGPYLC | COVER MY RETREAT | bifid | bifid | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
monoalphabetic-v3-0793 | TDA OHTTIA LB CATTYSOUQC IHSTAR TDQAA RHYS HKR NLST LVAQ BEBTY TDLUSHKR NHSUHITEAS TLTHI | TDA OHTTIA LB CATTYSOUQC IHSTAR TDQAA RHYS HKR NLST LVAQ BEBTY TDLUSHKR NHSUHITEAS TLTHI | THE BATTLE OF GETTYSBURG LASTED THREE DAYS AND COST OVER FIFTY THOUSAND CASUALTIES TOTAL | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "HONOR"
} | beginner | en | 75 | 88 | cipher_museum | 2.0 | public | null | null |
cda-0016213 | 01950 0368 2859 3852 00951 03852 04801 5979 1604 1269 2907 6002 00397 5108 04719 6046 6355 06665 05709 1604 4463 4738 06282 00368 6010 03791 4797 02216 00329 04478 6351 07256 04725 6060 05411 06650 0333 05724 1607 00980 2894 05105 02519 01579 05716 1613 04421 1012 05691 07914 05102 6299 05968 01283 2879 2247 5687 00325... | 01950 0368 2859 3852 00951 03852 04801 5979 1604 1269 2907 6002 00397 5108 04719 6046 6355 06665 05709 1604 4463 4738 06282 00368 6010 03791 4797 02216 00329 04478 6351 07256 04725 6060 05411 06650 0333 05724 1607 00980 2894 05105 02519 01579 05716 1613 04421 1012 05691 07914 05102 6299 05968 01283 2879 2247 5687 00325... | FAIL CLOSED IS A POSTURE NOT A SLOGAN TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION | zimmermann | zimmermann | null | {} | hard | en | 126 | 126 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
kryha-v2-0030 | YNYNOJGDGORTRTNRPXU | YNYNOJGDGORTRTNRPXU | WISDOM GUARDS THE GATE | kryha | kryha | machine | {
"type": "keyword",
"value": "MUNICH"
} | expert | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
cda-0017333 | 845 860 805 834 825 808 999 825 841 815 851 802 855 858 851 862 807 857 862 852 814 999 810 812 856 812 852 865 812 855 999 807 801 853 812 817 862 833 999 810 813 854 824 818 840 999 808 801 814 855 801 852 999 855 823 825 815 857 814 811 999 859 823 814 999 802 833 845 821 801 805 814 857 999 803 873 999 858 822 851 ... | 845 860 805 834 825 808 999 825 841 815 851 802 855 858 851 862 807 857 862 852 814 999 810 812 856 812 852 865 812 855 999 807 801 853 812 817 862 833 999 810 813 854 824 818 840 999 808 801 814 855 801 852 999 855 823 825 815 857 814 811 999 859 823 814 999 802 833 845 821 801 805 814 857 999 803 873 999 858 822 851 ... | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES A STRONG CLAIM NEEDS STRONG EVIDENCE NEVER | culper_ring | culper_ring | null | {} | hard | en | 162 | 162 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
cda-0015586 | X L r X· ┌· Γ· K ⌒· r └ ⌐ Γ· ┌ X X r· ┘· X· └ Γ ¬ L K L X K L Γ X· ─ Γ L ┌· X r ┌· X· K Γ· ─ ⌒· | X L r X· ┌· Γ· K ⌒· r └ ⌐ Γ· ┌ X X r· ┘· X· └ Γ ¬ L K L X K L Γ X· ─ Γ L ┌· X r ┌· X· K Γ· ─ ⌒· | SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY | pigpen | pigpen | null | {} | easy | en | 22 | 22 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
vernam-v2-0105 | XKPUMFYTWCE | XKPUMFYTWCE | HOLD THE LINE | vernam | vernam | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 11 | 11 | cipher_museum | 2.0 | public | null | null |
jefferson-disk-v3-0243 | HDGIIGHDGOIBLHPMRDSZUYVXTZBMWQZRIPDIOESYGHOMLYQZNPEGZWHTQVIVHYEFICAJBPWRKDQV | HDGIIGHDGOIBLHPMRDSZUYVXTZBMWQZRIPDIOESYGHOMLYQZNPEGZWHTQVIVHYEFICAJBPWRKDQV | AT THE BATTLE OF MIDWAY AMERICAN DIVE BOMBERS DESTROYED FOUR JAPANESE CARRIERS IN MINUTES | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "1,3,5,2,4,6"
} | expert | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
straddling-checkerboard-v2-0301 | 425227172128847652329220976836543401862221842105707022425134252224226428220186230529252217322612057322 | 425227172128847652329220976836543401862221842105707022425134252224226428220186230529252217322612057322 | THE QUALITY OF MERCY IS NOT STRAINED IT DROPPETH AS THE GENTLE RAIN FROM HEAVEN ABOVE | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "RASTONICEL"
} | advanced | en | 102 | 102 | cipher_museum | 2.0 | public | null | null |
cda-0018454 | 25 88 22 40 48 11 43 82 24 23 86 1 11 94 66 62 64 22 99 67 32 60 81 26 68 50 48 21 32 58 23 61 1 66 96 87 39 72 11 33 62 66 11 1 63 26 50 91 32 34 23 99 72 91 2 43 30 76 24 82 81 82 96 78 82 41 50 | 25 88 22 40 48 11 43 82 24 23 86 1 11 94 66 62 64 22 99 67 32 60 81 26 68 50 48 21 32 58 23 61 1 66 96 87 39 72 11 33 62 66 11 1 63 26 50 91 32 34 23 99 72 91 2 43 30 76 24 82 81 82 96 78 82 41 50 | THE MESSAGE WAS HIDDEN BUT NOT SECURE FAIL CLOSED IS A POSTURE NOT A SLOGAN ALWAYS | homophonic | homophonic | null | {} | medium | en | 67 | 67 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
cda-0011820 | TEISPGRATPUSEEREWDNUAESMSRDUAHCRROEASSCSEEHRPDKEEPNHEEHSAEDHIFNXIITSSNTECTOKSEREEUUHTSBHAHPMPCRGAIYTAERVIERRIWGNREIOPHEGIUEHIRLMHXXAIDETECTDEMELSEQADRONEUCG | TEISPGRATPUSEEREWDNUAESMSRDUAHCRROEASSCSEEHRPDKEEPNHEEHSAEDHIFNXIITSSNTECTOKSEREEUUHTSBHAHPMPCRGAIYTAERVIERRIWGNREIOPHEGIUEHIRLMHXXAIDETECTDEMELSEQADRONEUCG | THE VIGENERE CIPHER USES A REPEATING KEYWORD DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS THE MESSAGE WAS HIDDEN BUT NOT SECURE THE ARCHITECTURE SHOULD MAKE MISUSE HARDER | stager_route | stager_route | null | {
"cols": 6
} | hard | en | 156 | 156 | synthetic_educational | null | null | [] | |
typex-v3-0116 | AZLKBHIW | AZLKBHIW | DEUS VULT | typex | typex | machine | {
"type": "keyword",
"value": "BRITAIN"
} | expert | en | 8 | 8 | cipher_museum | 2.0 | public | null | null |
cda-0014399 | CDTJG VICWC QBUIV VLWTT VJNCH WGIEP WKTIE AYCXD NLIJS FTGAL AGQFG VRLEJ LAIRG WAHRU BJOVL XEKFT THQQD BLEGG UEUJW VQTLU TDNEE WKVOT JKYPQ QWMFA SRFXV BXAFI HGEIW HFNVS UGNEC TIVWV UNVEU FOACY G | CDTJG VICWC QBUIV VLWTT VJNCH WGIEP WKTIE AYCXD NLIJS FTGAL AGQFG VRLEJ LAIRG WAHRU BJOVL XEKFT THQQD BLEGG UEUJW VQTLU TDNEE WKVOT JKYPQ QWMFA SRFXV BXAFI HGEIW HFNVS UGNEC TIVWV UNVEU FOACY G | A STRONG CLAIM NEEDS STRONG EVIDENCE GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY FAIL CLOSED IS A POSTURE NOT A SLOGAN ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS | running_key | running_key | null | {} | hard | en | 161 | 161 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
trithemius-067 | ACQUX ROZARYY ZBK | ACQUX ROZARYY ZBK | ABORT MISSION NOW | trithemius | trithemius | polyalphabetic | {
"type": "offset",
"value": 0
} | beginner | en | 15 | 17 | cipher_museum | 0.2 | public | null | null |
cda-0006025 | RACAMQBL UC YXO NYSJPBQAUG QN JUONRONY UEB PAADTPZM UBZAHZ ZGXDHA JDRRAPOCJLKQP UCPHWYC PQHKQHRN ORADTPZWOH YIKCY | RACAMQBL UC YXO NYSJPBQAUG QN JUONRONY UEB PAADTPZM UBZAHZ ZGXDHA JDRRAPOCJLKQP UCPHWYC PQHKQHRN ORADTPZWOH YIKCY | BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE | beaufort | beaufort | null | {
"key": "SECURE"
} | hard | en | 99 | 99 | synthetic_educational | null | null | [
"kasiski_examination",
"friedman_test",
"index_of_coincidence"
] | Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption). |
alberti-disk-v2-0362 | CGASVKKHJIRYNMCJITIGSKRXFJDPSAAKMLOVXCFMLYJXLZDNAUEHEMTRAHYLEEBXCXRDGJDYXECUCQZHXFSPFWPLPEEOOZVOTDRRGSTHZIPZITIRPPBDSYJUOONIERCXEXXJBJQD | CGASVKKHJIRYNMCJITIGSKRXFJDPSAAKMLOVXCFMLYJXLZDNAUEHEMTRAHYLEEBXCXRDGJDYXECUCQZHXFSPFWPLPEEOOZVOTDRRGSTHZIPZITIRPPBDSYJUOONIERCXEXXJBJQD | WE SHALL FIGHT ON THE BEACHES WE SHALL FIGHT ON THE LANDING GROUNDS WE SHALL FIGHT IN THE FIELDS AND IN THE STREETS WE SHALL FIGHT IN THE HILLS WE SHALL NEVER SURRENDER | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 8
} | expert | en | 136 | 136 | cipher_museum | 2.0 | public | null | null |
cda-0011925 | EXAC TVER SEEI GHTR OADS YIEL DSEE KSYE ARSS WIFT TAKE SENT ERMI LESN AVAL ENEM YENE MYDE PTHS EEKS ABOV ENAV ALHE ADSO THER NIGH TEAR LYSH ORET ROOP TURN S | EXAC TVER SEEI GHTR OADS YIEL DSEE KSYE ARSS WIFT TAKE SENT ERMI LESN AVAL ENEM YENE MYDE PTHS EEKS ABOV ENAV ALHE ADSO THER NIGH TEAR LYSH ORET ROOP TURN S | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS CERTAINLY | 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. |
beaufort-v3-0501 | CBYEAVUEQPFVOUKEWTVNVCUJMKXLNPYQWYYCEKSQYRRGOGWYQCOJLAEYEELPWNHAEZAAYRRQJTVNG | CBYEAVUEQPFVOUKEWTVNVCUJMKXLNPYQWYYCEKSQYRRGOGWYQCOJLAEYEELPWNHAEZAAYRRQJTVNG | THE POWERS NOT DELEGATED TO THE UNITED STATES BY THE CONSTITUTION ARE RESERVED TO THE STATES | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "VICTORY"
} | intermediate | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
two-square-114 | FLEEGAQGCE | FLEEGAQGCE | FLEE AT ONCE | two_square | two_square | polygraphic | {
"key1": "SECRET",
"key2": "AGENTS"
} | advanced | en | 10 | 10 | cipher_museum | 0.2 | public | null | null |
vigenere-v2-0886 | DBPVDMFPJSIRVF | DBPVDMFPJSIRVF | STORM THE BREACH | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
cda-0013680 | CRYP ZOGR AZHY REXA RDSZ ATIE NCEA NXCA REXU LTHI NKIN Z | CRYP ZOGR AZHY REXA RDSZ ATIE NCEA NXCA REXU LTHI NKIN Z | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING | commercial_code | commercial_code | null | {} | medium | en | 45 | 45 | synthetic_educational | null | null | [
"codebook_frequency",
"five_letter_group_analysis"
] | Commercial code: five-letter groups from a codebook, often ending in X or Z. |
columnar-transposition-v3-0394 | OSKRITMEOBHXRLOPALTGRIRCELLENIOIONEINHEENAELRIEEGANSGBNIPTFRSMACESFOHGESCSAWTSHRNITEE | OSKRITMEOBHXRLOPALTGRIRCELLENIOIONEINHEENAELRIEEGANSGBNIPTFRSMACESFOHGESCSAWTSHRNITEE | CONGRESS SHALL MAKE NO LAW RESPECTING AN ESTABLISHMENT OF RELIGION OR PROHIBITING THE FREE EXERCISE | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "WARRIOR"
} | intermediate | en | 85 | 85 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v3-0916 | QPTFXVPRTNDMPCKKFPEZRBRTCHSJPXDDEQOWBPDXLNIVTOFWTUQQVFYHOXNKQUSGGJSEOJMVVZ | QPTFXVPRTNDMPCKKFPEZRBRTCHSJPXDDEQOWBPDXLNIVTOFWTUQQVFYHOXNKQUSGGJSEOJMVVZ | NO PERSON SHALL BE HELD TO ANSWER FOR A CAPITAL CRIME UNLESS ON PRESENTMENT OF A GRAND JURY | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "31416"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0008438 | CHOYVP VASENFGEHPGHER QRFREIRF PNERSHY QRFVTA CBYLNYCUNORGVP PVCUREF HFR ZHYGVCYR NYCUNORG FUVSGF | CHOYVP VASENFGEHPGHER QRFREIRF PNERSHY QRFVTA CBYLNYCUNORGVP PVCUREF HFR ZHYGVCYR NYCUNORG FUVSGF | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 87 | 87 | synthetic_educational | null | null | [] | |
cda-0016873 | 20 8 5 11 1 19 9 19 11 9 5 24 1 13 9 14 1 20 9 15 14 6 9 14 4 19 18 5 16 5 1 20 5 4 20 18 9 7 18 1 13 19 9 14 3 9 16 8 5 18 20 5 24 20 20 8 5 5 14 9 7 13 1 13 1 3 8 9 14 5 21 19 5 4 18 15 20 15 18 19 20 15 3 18 5 1 20 5 1 16 15 12 25 1 12 16 8 1 2 5 20 9 3 3 9 16 8 5 18 1 14 1 6 6 9 14 5 3 9 16 8 5 18 1 16 16 12 9 5 19... | 20 8 5 11 1 19 9 19 11 9 5 24 1 13 9 14 1 20 9 15 14 6 9 14 4 19 18 5 16 5 1 20 5 4 20 18 9 7 18 1 13 19 9 14 3 9 16 8 5 18 20 5 24 20 20 8 5 5 14 9 7 13 1 13 1 3 8 9 14 5 21 19 5 4 18 15 20 15 18 19 20 15 3 18 5 1 20 5 1 16 15 12 25 1 12 16 8 1 2 5 20 9 3 3 9 16 8 5 18 1 14 1 6 6 9 14 5 3 9 16 8 5 18 1 16 16 12 9 5 19... | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER | aeneas_tacticus | aeneas_tacticus | null | {} | hard | en | 157 | 157 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
nihilist-010 | 79 58 79 77 40 77 68 40 86 59 39 67 58 50 89 48 76 79 45 50 78 | 79 58 79 77 40 77 68 40 86 59 39 67 58 50 89 48 76 79 45 50 78 | THE PACKAGE IS DELIVERED | nihilist | nihilist | fractionation | {
"polybius": "RUSSIAN",
"keyword": "KEY"
} | advanced | en | 42 | 62 | cipher_museum | 0.2 | public | null | null |
kryha-v2-0150 | CNEOXKSWSIPMRAVL | CNEOXKSWSIPMRAVL | THE WALLS HAVE EARS | kryha | kryha | machine | {
"type": "keyword",
"value": "VIENNA"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
hill-215 | BDGSMLVQYSHIBARNXFVQSBSSUEHZCWMJTKSMRNIWZC | BDGSMLVQYSHIBARNXFVQSBSSUEHZCWMJTKSMRNIWZC | IN WAR THE MORAL IS TO THE PHYSICAL AS THREE IS TO ONE | hill | hill | polygraphic | {
"a": 5,
"b": 3,
"c": 2,
"d": 7
} | advanced | en | 42 | 42 | cipher_museum | 0.2 | public | null | null |
fialka-v3-0010 | VVHXMCABYWQKZXOO | VVHXMCABYWQKZXOO | PER ASPERA AD ASTRA | fialka | fialka | machine | {
"type": "seed",
"value": "MOSCOW"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
m209-v2-0199 | KWANYALAKMYWZIMTPXEVZCAUKZBLJTPYJKBLJAXORBKKZNDKEJUQAXBIJFOHJYKGZCLVQYAZZ | KWANYALAKMYWZIMTPXEVZCAUKZBLJTPYJKBLJAXORBKKZNDKEJUQAXBIJFOHJYKGZCLVQYAZZ | THE SECRET OF GETTING AHEAD IS GETTING STARTED ONE STEP AT A TIME GETS YOU VERY FAR INDEED | m209 | m209 | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
solitaire-v3-0310 | OUEFFSXEGCODKGWBKCACHTXEQNNEDWLKDXXUBWDIGAKEGVOELPWZQJCMKFXHDEIISHUKUAGFMKMDQJFKSGZWANAZIROWRXDPZCBWILJPSSPSDLQITBJJYMRONSGXTPQTEUXMIYNJBDFGHYAIOUBWYJQIECZFENMXBOMWD | OUEFFSXEGCODKGWBKCACHTXEQNNEDWLKDXXUBWDIGAKEGVOELPWZQJCMKFXHDEIISHUKUAGFMKMDQJFKSGZWANAZIROWRXDPZCBWILJPSSPSDLQITBJJYMRONSGXTPQTEUXMIYNJBDFGHYAIOUBWYJQIECZFENMXBOMWD | 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 | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "PONTIFEX"
} | expert | en | 165 | 165 | cipher_museum | 2.0 | public | null | null |
four-square-v3-0123 | ELKSCMSRQCFHXLPUROPCIZCBSDPX | ELKSCMSRQCFHXLPUROPCIZCBSDPX | DONT FIRE TILL YOU SEE THE WHITES | four_square | four_square | polygraphic | {
"key1": "LIBERTY",
"key2": "FREEDOM"
} | advanced | en | 28 | 28 | cipher_museum | 2.0 | public | null | null |
solitaire-v3-0225 | OUEDNSWHRVODYHNWGLAZ | OUEDNSWHRVODYHNWGLAZ | THE KING DEMANDS FEALTY | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "PONTIFEX"
} | expert | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
nomenclator-v3-0289 | 60 13 15 12 05 02 21 18 09 05 04 04 05 05 16 64 60 09 14 20 05 12 12 09 07 05 14 03 05 01 07 05 14 03 25 16 01 19 19 05 04 22 09 20 01 12 19 05 03 18 05 20 19 63 60 15 20 08 05 18 19 09 04 05 06 15 18 25 05 01 18 19 | 60 13 15 12 05 02 21 18 09 05 04 04 05 05 16 64 60 09 14 20 05 12 12 09 07 05 14 03 05 01 07 05 14 03 25 16 01 19 19 05 04 22 09 20 01 12 19 05 03 18 05 20 19 63 60 15 20 08 05 18 19 09 04 05 06 15 18 25 05 01 18 19 | THE MOLE BURIED DEEP IN THE INTELLIGENCE AGENCY PASSED VITAL SECRETS TO THE OTHER SIDE FOR YEARS | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 144 | 215 | cipher_museum | 2.0 | public | null | null |
kl7-v2-0106 | FSCVYRIPURAGDBEAXJXCZDOKYTGXBFJDMJVBHJHVEJMNJYRQVCRUZHWARLQBWRNYAXHBPSFHBGWFNHZGO | FSCVYRIPURAGDBEAXJXCZDOKYTGXBFJDMJVBHJHVEJMNJYRQVCRUZHWARLQBWRNYAXHBPSFHBGWFNHZGO | GENERAL ORDERS NUMBER ONE ALL COMMUNICATIONS SHALL BE ENCRYPTED USING THE APPROVED CIPHER DISK | kl7 | kl7 | machine | {
"type": "seed",
"value": "NATO"
} | expert | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
bazeries-v2-0435 | FHAQBVJQYRBGJITMFVAQBVYIQBMFARGFMJNXPSQYGGKSTIBOQFIYAQJVPIJBIFPTISGFYAT | FHAQBVJQYRBGJITMFVAQBVYIQBMFARGFMJNXPSQYGGKSTIBOQFIYAQJVPIJBIFPTISGFYAT | WITH MALICE TOWARD NONE WITH CHARITY FOR ALL LET US BIND UP THE NATIONS WOUNDS AND HEAL | bazeries | bazeries | transposition | {
"type": "integer",
"value": 41
} | advanced | en | 71 | 71 | cipher_museum | 2.0 | public | null | null |
cda-0017112 | BAAB AAAB BBAA BAAA AAAA BAAB BBAA BAAB BABA BAAB AABA ABAB BAAA ABAA BAAA ABBB AAAB BBAA BAAB AAAA AABA ABAB ABBA ABAA ABAA ABBA AAAA BBBA AABB AABA AABB BAAB AAAB AABA ABAA BABB ABAB AAAB AAAB AABA AABB BBAA BAAA BBBA ABAA ABBB AABA BAAA AAAA BAAA ABBA ABAA BAAA BAAB ABAB BAAB AABA AABA ABAB AAAB AABA AABA BAAA BAB | BAAB AAAB BBAA BAAA AAAA BAAB BBAA BAAB BABA BAAB AABA ABAB BAAA ABAA BAAA ABBB AAAB BBAA BAAB AAAA AABA ABAB ABBA ABAA ABAA ABBA AAAA BBBA AABB AABA AABB BAAB AAAB AABA ABAA BABB ABAB AAAB AAAB AABA AABB BBAA BAAA BBBA ABAA ABBB AABA BAAA AAAA BAAA ABBA ABAA BAAA BAAB ABAB BAAB AABA AABA ABAB AAAB AABA AABA BAAA BAB | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF | bacon_cipher | bacon_cipher | null | {} | hard | en | 255 | 255 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
enigma-v2-1182 | WFUNWKYQBQGEVEDZCMTKZNVRDHZETHSEQASIPDWGLGDBGDQTAUQQREHQMWKCTJYWWZHA | WFUNWKYQBQGEVEDZCMTKZNVRDHZETHSEQASIPDWGLGDBGDQTAUQQREHQMWKCTJYWWZHA | ALL THE WORLDS A STAGE AND EACH MAN IN HIS TIME PLAYS MANY PARTS ON LIFES GREAT STAGE | enigma | enigma | machine | {
"type": "rotor_start",
"value": "ZZA"
} | expert | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
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