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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
hill-v2-0340 | VLIWHGRDNNDSGXFIDAADXCIPJWHRHHOOVNJPGKVQNRECNCEPIAFKIABKIYTTPDMOLFEAOXIAKBCKTKTB | VLIWHGRDNNDSGXFIDAADXCIPJWHRHHOOVNJPGKVQNRECNCEPIAFKIABKIYTTPDMOLFEAOXIAKBCKTKTB | CLAUDE SHANNON PROVED THAT THE ONE TIME PAD ACHIEVES PERFECT SECRECY WHEN USED CORRECTLY ONCE | hill | hill | polygraphic | {
"a": 7,
"b": 3,
"c": 4,
"d": 5
} | advanced | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
nihilist-v2-0084 | 44 54 59 85 58 30 55 26 98 56 47 27 34 66 87 75 56 30 74 23 57 79 44 59 64 56 69 59 36 27 35 56 88 69 25 59 35 27 86 88 25 46 55 25 59 88 57 30 63 55 56 55 24 30 33 54 67 56 55 48 56 54 59 79 36 59 36 46 75 78 28 49 45 25 75 87 38 59 36 65 88 | 44 54 59 85 58 30 55 26 98 56 47 27 34 66 87 75 56 30 74 23 57 79 44 59 64 56 69 59 36 27 35 56 88 69 25 59 35 27 86 88 25 46 55 25 59 88 57 30 63 55 56 55 24 30 33 54 67 56 55 48 56 54 59 79 36 59 36 46 75 78 28 49 45 25 75 87 38 59 36 65 88 | FREQUENCY ANALYSIS EXPLOITS THE FACT THAT CERTAIN LETTERS APPEAR FAR MORE OFTEN IN ENGLISH TEXT | nihilist | nihilist | fractionation | {
"polybius": "PALACE",
"keyword": "BATTLE"
} | advanced | en | 162 | 242 | cipher_museum | 2.0 | public | null | null |
diana-v3-0295 | MHNYRKZCRQEQYGEYXSCOECMZOAEOSKDOGPKGEKAOZDRWZUDHBWNJLKSIZQEIXBLULABKFIRROKRSERUK | MHNYRKZCRQEQYGEYXSCOECMZOAEOSKDOGPKGEKAOZDRWZUDHBWNJLKSIZQEIXBLULABKFIRROKRSERUK | THE ENIGMA MACHINE HAD AN ASTRONOMICAL NUMBER OF POSSIBLE SETTINGS MAKING IT SEEM UNBREAKABLE | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "FORCES"
} | intermediate | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
cda-0019985 | DEPOT OFTEN NEEDS OUTER TURNS CROSS OTHER NAVAL FIRST UPPER STAGE EXACT OUTER BATCH FRONT UPPER STAGE CLAIM ALERT TRACK ISSUE OPENS NOTES WHILE INCUR | DEPOT OFTEN NEEDS OUTER TURNS CROSS OTHER NAVAL FIRST UPPER STAGE EXACT OUTER BATCH FRONT UPPER STAGE CLAIM ALERT TRACK ISSUE OPENS NOTES WHILE INCUR | DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION | 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. |
cda-0006172 | YAYS XENH INDN OHUA HENV RXDO TETW SHSS SREA XANM AARE SEOT ESPX EOMT RNXO SRTT OETG LIES OLDL NT | YAYS XENH INDN OHUA HENV RXDO TETW SHSS SREA XANM AARE SEOT ESPX EOMT RNXO SRTT OETG LIES OLDL NT | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL A TRANSPARENT TOOL SHOULD SHOW ITS REASONING | double_transposition | double_transposition | null | {
"key1": "CIPHER",
"key2": "PALACE"
} | medium | en | 78 | 78 | synthetic_educational | null | null | [
"key_length_search",
"anagram_recovery"
] | Double columnar transposition: apply columnar twice for stronger security. |
rot13-v3-0055 | FPVRAPR JVGUBHG ERYVTVBA VF YNZR NAQ ERYVTVBA JVGUBHG FPVRAPR VF OYVAQ FNVQ NYOREG RVAFGRVA | FPVRAPR JVGUBHG ERYVTVBA VF YNZR NAQ ERYVTVBA JVGUBHG FPVRAPR VF OYVAQ FNVQ NYOREG RVAFGRVA | SCIENCE WITHOUT RELIGION IS LAME AND RELIGION WITHOUT SCIENCE IS BLIND SAID ALBERT EINSTEIN | rot13 | rot13 | substitution | {
"type": "none",
"value": null
} | beginner | en | 78 | 91 | cipher_museum | 2.0 | public | null | null |
cda-0018990 | LLTLR DFGFD XVQBM DMTXP HOBDT EHBOP UKUWK ZYUJM DIMYN QCNKC UPEUM UDSSR OOHVQ CUECU PMNAC VGBDV TSWLK EDSMF UCYCG MKNCK PABPD SKGAN UEGYQ K | LLTLR DFGFD XVQBM DMTXP HOBDT EHBOP UKUWK ZYUJM DIMYN QCNKC UPEUM UDSSR OOHVQ CUECU PMNAC VGBDV TSWLK EDSMF UCYCG MKNCK PABPD SKGAN UEGYQ K | TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER | vernam | vernam | null | {} | hard | en | 116 | 116 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
playfair-es-033 | TGYMNGBVEAIAHAETFSNCHTTEIGNUNMIPUNEKMEFSBPHTIPUHALOP | TGYMNGBVEAIAHAETFSNCHTTEIGNUNMIPUNEKMEFSBPHTIPUHALOP | NAVEGAMOS EN UN MAR DE IGNORANCIA HACIA ISLAS DE CONOCIMIENTO | playfair | playfair | substitution | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | es | 52 | 52 | cipher_museum | 0.2 | public | null | null |
chinese-telegraph-v2-0097 | 1599 0285 0856 0918 0856 0012 1255 0285 1599 0285 0012 0729 0285 0219 1421 0472 0012 1421 0856 1503 0792 0285 1255 0918 1503 1346 1346 0918 1599 0538 0285 1421 0012 0408 0285 0856 1421 1346 0472 0012 0219 1024 0285 0856 0285 1421 1255 0012 1421 0285 0219 1421 0472 0285 0472 0538 0408 0472 0285 1346 1421 0729 0285 1599 ... | 1599 0285 0856 0918 0856 0012 1255 0285 1599 0285 0012 0729 0285 0219 1421 0472 0012 1421 0856 1503 0792 0285 1255 0918 1503 1346 1346 0918 1599 0538 0285 1421 0012 0408 0285 0856 1421 1346 0472 0012 0219 1024 0285 0856 0285 1421 1255 0012 1421 0285 0219 1421 0472 0285 0472 0538 0408 0472 0285 1346 1421 0729 0285 1599 ... | VENONA REVEALED THAT NUMEROUS SOVIET AGENTS HAD PENETRATED THE HIGHEST LEVELS OF THE US GOVERNMENT | chinese_telegraph | chinese_telegraph | codebook | {
"type": "none",
"value": null
} | expert | en | 336 | 419 | cipher_museum | 2.0 | public | null | null |
diana-v3-0398 | LXQPNCGXVJDDCLXROEYZHLXTFNQQYPUAXGQSEYMYTFHQBNNRQSACAEBGRHSAPAFXELKRIJUUIAPAQXV | LXQPNCGXVJDDCLXROEYZHLXTFNQQYPUAXGQSEYMYTFHQBNNRQSACAEBGRHSAPAFXELKRIJUUIAPAQXV | ALL PERSONS BORN OR NATURALIZED IN THE UNITED STATES ARE CITIZENS SUBJECT TO EQUAL PROTECTION | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
cda-0003688 | KJHKIACYN APEECTSK CPN UWHAPP PWCU NSWTYNX LHWL NLFDWG ECX UWNNBXRYUDHPDHE SPHSWL WC JHIYEYYE | KJHKIACYN APEECTSK CPN UWHAPP PWCU NSWTYNX LHWL NLFDWG ECX UWNNBXRYUDHPDHE SPHSWL WC JHIYEYYE | FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH | beaufort | beaufort | null | {
"key": "PALACE"
} | hard | en | 81 | 81 | synthetic_educational | null | null | [
"kasiski_examination",
"friedman_test",
"index_of_coincidence"
] | Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption). |
kl7-v2-0315 | DQIYYHCJDDSFLIJCKADXPROSKIURUXHEWXNGJMTQVUKGVHASTORHYKUGVHCONZYRATGGBGJXOB | DQIYYHCJDDSFLIJCKADXPROSKIURUXHEWXNGJMTQVUKGVHASTORHYKUGVHCONZYRATGGBGJXOB | FOR GOD SO LOVED THE WORLD THAT HE GAVE HIS ONLY SON THAT WHOEVER BELIEVES SHALL NOT PERISH | kl7 | kl7 | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
jn25-v3-0184 | 09996 09919 09901 09997 09902 09908 09903 09906 09996 09919 09901 09999 09902 09997 09902 09908 09993 09900 09900 09997 09995 09993 09902 09991 09993 09995 09999 09908 09996 09993 09906 09997 09902 09995 09906 09993 09900 09997 09993 09907 09903 09902 09904 09993 09906 09907 09903 09902 09999 09900 09991 09903 09902 09... | 09996 09919 09901 09997 09902 09908 09903 09906 09996 09919 09901 09999 09902 09997 09902 09908 09993 09900 09900 09997 09995 09993 09902 09991 09993 09995 09999 09908 09996 09993 09906 09997 09902 09995 09906 09993 09900 09997 09993 09907 09903 09902 09904 09993 09906 09907 09903 09902 09999 09900 09991 09903 09902 09... | HUMINT OR HUMAN INTELLIGENCE GATHERING RELIES ON PERSONAL CONTACT AND HUMAN SOURCES IN THE FIELD | jn25 | jn25 | codebook | {
"type": "additive",
"value": "99999"
} | expert | en | 410 | 491 | cipher_museum | 2.0 | public | null | null |
cda-0015856 | 36 50 61 66 69 80 50 52 68 57 52 50 65 36 82 80 61 68 80 82 66 82 68 52 36 82 80 61 29 69 66 65 80 69 66 82 52 66 50 69 29 82 29 66 80 69 65 43 77 82 68 61 59 80 82 61 59 29 52 82 80 66 68 50 29 66 43 50 29 68 11 50 61 66 80 50 20 59 66 50 69 29 11 50 76 76 50 82 68 29 11 36 82 57 57 77 68 29 50 29 66 80 69 11 59 52 82... | 36 50 61 66 69 80 50 52 68 57 52 50 65 36 82 80 61 68 80 82 66 82 68 52 36 82 80 61 29 69 66 65 80 69 66 82 52 66 50 69 29 82 29 66 80 69 65 43 77 82 68 61 59 80 82 61 59 29 52 82 80 66 68 50 29 66 43 50 29 68 11 50 61 66 80 50 20 59 66 50 69 29 11 50 76 76 50 82 68 29 11 36 82 57 57 77 68 29 50 29 66 80 69 11 59 52 82... | HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX TODAY | wallis_cipher | wallis_cipher | null | {} | hard | en | 154 | 154 | synthetic_educational | null | null | [
"number_substitution_decode",
"frequency_analysis"
] | Wallis cipher: each letter mapped to a unique two-digit number from a fixed table. |
alberti-disk-v2-0435 | DJYROULQHIXAVTCIZBZJUOELJOIWNFSLDVJYCCOGHGPBEMSFSYAVOIXUUIKGQGBRATYWXZG | DJYROULQHIXAVTCIZBZJUOELJOIWNFSLDVJYCCOGHGPBEMSFSYAVOIXUUIKGQGBRATYWXZG | WITH MALICE TOWARD NONE WITH CHARITY FOR ALL LET US BIND UP THE NATIONS WOUNDS AND HEAL | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 10
} | expert | en | 71 | 71 | cipher_museum | 2.0 | public | null | null |
cardano-autokey-v2-0219 | YALTPCMKGKGQBGTIVFTMFYTGZVGLXTFKALRRAPHFGTHRUACLDNPGWQQLXQPHPTDZVKHODPUZRLDEUBAUBK | YALTPCMKGKGQBGTIVFTMFYTGZVGLXTFKALRRAPHFGTHRUACLDNPGWQQLXQPHPTDZVKHODPUZRLDEUBAUBK | THE PACKAGE CONTAINS BLUEPRINTS FOR THE NEW TORPEDO GUIDANCE SYSTEM DELIVER TO ADMIRAL SMITH NOW | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "FLORENCE"
} | advanced | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
kryptos-v2-0155 | QHWYYTEYIQYDXBGVYLVFT | QHWYYTEYIQYDXBGVYLVFT | PATIENCE BRINGS VICTORY | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "LANGLEY"
} | advanced | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
bifid-v2-0117 | RAQCLACKLSUOMVNAHLSMPKFIVNTCNSFITALMLPCNKOCFVGKQFSBTQCCLSKUPAPUNGLFQCLGLLIGKSIKNUILTSCUYHGQEWXOVMPCETWCGUCWRERETWWXITXXWGXYSGWXVWIEZRHGXEFHAXYQTNMBOKWFGGXMGDXBUHQHHSWRYYUBX | RAQCLACKLSUOMVNAHLSMPKFIVNTCNSFITALMLPCNKOCFVGKQFSBTQCCLSKUPAPUNGLFQCLGLLIGKSIKNUILTSCUYHGQEWXOVMPCETWCGUCWRERETWWXITXXWGXYSGWXVWIEZRHGXEFHAXYQTNMBOKWFGGXMGDXBUHQHHSWRYYUBX | THE GREAT CIPHER OF LOUIS XIV INVENTED BY ANTOINE AND BONAVENTURE ROSSIGNOL USED A NOMENCLATOR OF OVER FIVE HUNDRED NUMBERS REPRESENTING SYLLABLES WORDS AND NULLS AND REMAINED UNBROKEN FOR TWO CENTURIES | bifid | bifid | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 172 | 172 | cipher_museum | 2.0 | public | null | null |
adfgx-v2-0510 | DAAGAAGGAXFAFGGAADDXGXAFGFXDGFAXXAGDXGDDXGXXXDGGFGFFDXAFGXDDAAAFAFAFXXGXGXAAAXXDFXDXFXDDGXGXDF | DAAGAAGGAXFAFGGAADDXGXAFGFXDGFAXXAGDXGDDXGXXXDGGFGFFDXAFGXDDAAAFAFAFXXGXGXAAAXXDFXDXFXDDGXGXDF | THE COURSE OF TRUE LOVE NEVER DID RUN SMOOTH THROUGH AGES | adfgx | adfgx | fractionation | {
"polybius": "WISDOM",
"columnar": "COURAGE"
} | advanced | en | 94 | 94 | cipher_museum | 2.0 | public | null | null |
cda-0007910 | FSKHHRGU MBDTYNHTT BWR FZJDRG FSQP WYGAQBDTOF | FSKHHRGU MBDTYNHTT BWR FZJDRG FSQP WYGAQBDTOF | FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS | trithemius | trithemius | null | {} | medium | en | 40 | 40 | synthetic_educational | null | null | [] | |
red-type-a-v2-0402 | GPUKIRVPFATYUIGG | GPUKIRVPFATYUIGG | THE WALLS HAVE EARS | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "MIKADO"
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
sigaba-v2-0454 | IJOIULMISBKPMCCIIQHGKBRMQOPODUEVSURCVTNOVHJTQPLXZCGEBDWENVIPVSTLPJIVWCPPNGQRC | IJOIULMISBKPMCCIIQHGKBRMQOPODUEVSURCVTNOVHJTQPLXZCGEBDWENVIPVSTLPJIVWCPPNGQRC | ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW | sigaba | sigaba | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
stager-route-272 | NTYMENAKGIYOEEVRUWSAEXMMHRRERUEEAIXXSKNNPINTEHITX | NTYMENAKGIYOEEVRUWSAEXMMHRRERUEEAIXXSKNNPINTEHITX | NEVER INTERRUPT YOUR ENEMY WHEN HE IS MAKING A MISTAKE | stager_route | stager_route | transposition | {
"type": "integer",
"value": 7
} | expert | en | 49 | 49 | cipher_museum | 0.2 | public | null | null |
cda-0008287 | NFGEB ATPYN VZARR QFFGE BATRI VQRAP RNGEN AFCNE RAGGB BYFUB HYQFU BJVGF ERNFB AVAT | NFGEB ATPYN VZARR QFFGE BATRI VQRAP RNGEN AFCNE RAGGB BYFUB HYQFU BJVGF ERNFB AVAT | A STRONG CLAIM NEEDS STRONG EVIDENCE A TRANSPARENT TOOL SHOULD SHOW ITS REASONING | rot13 | rot13 | null | {
"shift": 13
} | medium | en | 69 | 69 | synthetic_educational | null | null | [] | |
sigaba-v3-0040 | BGVTEE | BGVTEE | EUREKA | sigaba | sigaba | machine | {
"type": "seed",
"value": "ECMMARK"
} | expert | en | 6 | 6 | cipher_museum | 2.0 | public | null | null |
four-square-058 | RHEAHOLLES | RHEAHOLLES | FLEE AT ONCE | four_square | four_square | polygraphic | {
"key1": "CIPHER",
"key2": "MUSEUM"
} | advanced | en | 10 | 10 | cipher_museum | 0.2 | public | null | null |
cda-0012940 | 21 11 24 31 13 31 34 43 15 14 24 43 11 35 34 43 44 45 42 15 33 34 44 11 43 31 34 22 11 33 44 42 11 33 43 35 34 43 24 44 24 34 33 13 24 35 23 15 42 43 42 15 11 42 42 11 33 22 15 31 15 44 44 15 42 43 52 24 44 23 34 45 44 43 45 12 43 44 24 44 45 44 24 34 33 44 23 15 24 33 14 15 53 34 21 13 34 24 33 13 24 14 15 33 13 15 24... | 21 11 24 31 13 31 34 43 15 14 24 43 11 35 34 43 44 45 42 15 33 34 44 11 43 31 34 22 11 33 44 42 11 33 43 35 34 43 24 44 24 34 33 13 24 35 23 15 42 43 42 15 11 42 42 11 33 22 15 31 15 44 44 15 42 43 52 24 44 23 34 45 44 43 45 12 43 44 24 44 45 44 24 34 33 44 23 15 24 33 14 15 53 34 21 13 34 24 33 13 24 14 15 33 13 15 24... | FAIL CLOSED IS A POSTURE NOT A SLOGAN TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION THE INDEX OF COINCIDENCE IS A USEFUL CLUE CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING CERTAINLY | polybius | polybius | null | {} | hard | en | 173 | 173 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
m209-v2-0380 | ADMHUEYBRKMKCZCBMKOOGXY | ADMHUEYBRKMKCZCBMKOOGXY | CARTHAGE MUST BE DESTROYED | m209 | m209 | machine | {
"type": "seed",
"value": "VICTORY"
} | expert | en | 23 | 23 | cipher_museum | 2.0 | public | null | null |
porta-240 | WKDGGQLUSDJVCXLMPNNBEHZWIRQZPGOYBTTLCQKULFMMPNXUJUGYRGXPLVZNAMCUWLRPUSZHJWFOMGNVJGXTKYPWIUQYYFYBTTLMGXEUPRMPNUYDMHJCBVRKEHKBOMNEQJNRPMMTNBVHPMK | WKDGGQLUSDJVCXLMPNNBEHZWIRQZPGOYBTTLCQKULFMMPNXUJUGYRGXPLVZNAMCUWLRPUSZHJWFOMGNVJGXTKYPWIUQYYFYBTTLMGXEUPRMPNUYDMHJCBVRKEHKBOMNEQJNRPMMTNBVHPMK | CRYPTANALYSIS IS THE ART OF BREAKING CODES WITHOUT THE KEY AND IT HAS BEEN PRACTICED FOR AS LONG AS THERE HAVE BEEN CODES TO BREAK THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS | porta | porta | polyalphabetic | {
"type": "keyword",
"value": "PORTAGE"
} | intermediate | en | 143 | 143 | cipher_museum | 0.2 | public | null | null |
pigpen-v3-0025 | ¬ ┬ ⌐ ┐• ╳ ╳ ┬ ┼ ╱ ┼• ┴• ┼• ┤• ╳• ┼• | ¬ ┬ ⌐ ┐• ╳ ╳ ┬ ┼ ╱ ┼• ┴• ┼• ┤• ╳• ┼• | CHART THE UNKNOWN | pigpen | pigpen | substitution | {
"type": "none",
"value": null
} | beginner | en | 22 | 36 | cipher_museum | 2.0 | public | null | null |
cda-0013546 | - .-- --- / ... --.- ..- .- .-. . / -.-. .. .--. .... . .-. / . -. -.-. .-. -.-- .--. - ... / -.. .. --. .-. .- .--. .... ... / .-- .. - .... / - .-- --- / .--. --- .-.. -.-- -... .. ..- ... / .- .-.. .--. .... .- -... . - ... | - .-- --- / ... --.- ..- .- .-. . / -.-. .. .--. .... . .-. / . -. -.-. .-. -.-- .--. - ... / -.. .. --. .-. .- .--. .... ... / .-- .. - .... / - .-- --- / .--. --- .-.. -.-- -... .. ..- ... / .- .-.. .--. .... .- -... . - ... | TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS | morse_code | morse_code | null | {} | medium | en | 55 | 55 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
diana-v2-0429 | UAZXFFLIBBMMTNAEOQXCTXRZAZMYQEXRYPHHFIXNRQSKKAZLGSIOCNLGHVYAOLLGUKSYMUWRXMJQUYP | UAZXFFLIBBMMTNAEOQXCTXRZAZMYQEXRYPHHFIXNRQSKKAZLGSIOCNLGHVYAOLLGUKSYMUWRXMJQUYP | RICHMOND HAS FALLEN OUR FORCES HAVE ENTERED THE CITY RESISTANCE IS ENDED INFORM THE PRESIDENT | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
bifid-226 | CEDHAXEGRH | CEDHAXEGRH | FLEE AT ONCE | bifid | bifid | fractionation | {
"type": "keyword",
"value": "ENIGMA"
} | advanced | en | 10 | 10 | cipher_museum | 0.2 | public | null | null |
null-cipher-v3-0003 | right on more each would and show name old them by uout in look through its number old new each did at your | right on more each would and show name old them by uout in look through its number old new each did at your | ROME WAS NOT BUILT IN ONE DAY | null_cipher | null_cipher | steganography | {
"type": "position",
"value": "first"
} | advanced | en | 85 | 107 | cipher_museum | 2.0 | public | null | null |
affine-v3-0537 | JDI YKTW BIMGTBC PIGFJS | JDI YKTW BIMGTBC PIGFJS | THE KING DEMANDS FEALTY | affine | affine | substitution | {
"a": 7,
"b": 6
} | beginner | en | 20 | 23 | cipher_museum | 2.0 | public | null | null |
arnold-andre-v3-0045 | 13.1.1 14.4.4 14.4.5 14.1.5 14.1.1 14.3.3 15.1.1 13.1.1 14.4.1 14.3.5 14.5.3 14.1.5 14.4.3 15.1.1 13.1.1 14.4.5 14.4.3 14.1.1 14.3.4 14.4.4 14.2.1 14.3.5 14.4.3 14.3.3 14.4.4 15.1.1 | 13.1.1 14.4.4 14.4.5 14.1.5 14.1.1 14.3.3 15.1.1 13.1.1 14.4.1 14.3.5 14.5.3 14.1.5 14.4.3 15.1.1 13.1.1 14.4.5 14.4.3 14.1.1 14.3.4 14.4.4 14.2.1 14.3.5 14.4.3 14.3.3 14.4.4 15.1.1 | STEAM POWER TRANSFORMS | arnold_andre | arnold_andre | codebook | {
"type": "none",
"value": null
} | expert | en | 156 | 181 | cipher_museum | 2.0 | public | null | null |
vigenere-v3-1498 | WFBXMHOWFB | WFBXMHOWFB | DOT DASH DOT | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 10 | 10 | cipher_museum | 2.0 | public | null | null |
red-type-a-222 | HKYGWUHVYFFYECKHAFPUJQOLAONFATELABZTUVQIHIXOZYIMPLCUSYDWUFCOHYOW | HKYGWUHVYFFYECKHAFPUJQOLAONFATELABZTUVQIHIXOZYIMPLCUSYDWUFCOHYOW | CRYPTOGRAPHY IS THE PRACTICE OF SECURING COMMUNICATIONS FROM ADVERSARIES | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 64 | 64 | cipher_museum | 0.2 | public | null | null |
adfgvx-101 | AVGAXFXAVXFDAVAVDFGGGFGADFFGAVADADAVAGAGGADVDFGGFAVAGADFAGGDFDFAGVDFVDAFVVFGAAFFGDFAFVFDVDGGGF | AVGAXFXAVXFDAVAVDFGGGFGADFFGAVADADAVAGAGGADVDFGGFAVAGADFAGGDFDFAGVDFVDAFVVFGAAFFGDFAFVFDVDGGGF | ASK NOT WHAT YOUR COUNTRY CAN DO FOR YOU BUT WHAT YOU CAN DO | adfgvx | adfgvx | fractionation | {
"polybius": "CIPHER",
"columnar": "MUSEUM"
} | advanced | en | 94 | 94 | cipher_museum | 0.2 | public | null | null |
gronsfeld-v2-0332 | AOLOLHCLUZKLJSHYLAOLNSVYFVMNVKHUKAOLMPYTHTLUAZOVDLAOMVYAOOPZOHUKPDVYRLHJOUPNOA | AOLOLHCLUZKLJSHYLAOLNSVYFVMNVKHUKAOLMPYTHTLUAZOVDLAOMVYAOOPZOHUKPDVYRLHJOUPNOA | THE HEAVENS DECLARE THE GLORY OF GOD AND THE FIRMAMENT SHOWETH FORTH HIS HANDIWORK EACH NIGHT | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "77777"
} | intermediate | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
beaufort-133 | YVLVGMORNDMEYIY | YVLVGMORNDMEYIY | ENEMY FORCES NEAR | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
venona-pad-reuse-v3-0219 | FEAID7EFXVEQGMK2AJD | FEAID7EFXVEQGMK2AJD | AVE MARIA GRATIA PLENA | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "FREEDOM"
} | expert | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
cda-0011643 | XNOW HZFN YWTO NCLY NMGW YHJC PXCY PMXY NCID QHTJ PVJP F | XNOW HZFN YWTO NCLY NMGW YHJC PXCY PMXY NCID QHTJ PVJP F | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING | monoalphabetic | monoalphabetic | null | {
"alphabet": "YEXMCIFTJAVQBPZWRNGHDULKOS"
} | medium | en | 45 | 45 | synthetic_educational | null | null | [] | |
atbash-039 | ULIGFMV UZELIH GSV YLOW ZMW GSV YIZEV DSL WZIV GL ZXG | ULIGFMV UZELIH GSV YLOW ZMW GSV YIZEV DSL WZIV GL ZXG | FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT | atbash | atbash | substitution | {
"type": "none",
"value": null
} | beginner | en | 43 | 53 | cipher_museum | 0.2 | public | null | null |
purple-v3-0237 | NQEOILEUIURNTQTSETJU | NQEOILEUIURNTQTSETJU | THE REDCOATS ARE COMING | purple | purple | machine | {
"type": "seed",
"value": "SAKURA"
} | expert | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
cda-0015555 | .. ... .. .... .... ... .... .... ... .... .... .. .. .... . ... . . ... . . ... .. .... ... ..... .. ... . ..... .... .. .... ... . . .... .. . ..... .... .... . ..... . . . ... .. ... . ..... .... .. .... ... ... ... ... .... .... .... ... ..... .... .. ... .... .... .... . ..... .... | .. ... .. .... .... ... .... .... ... .... .... .. .. .... . ... . . ... . . ... .. .... ... ..... .. ... . ..... .... .. .... ... . . .... .. . ..... .... .... . ..... . . . ... .. ... . ..... .... .. .... ... ... ... ... .... .... .... ... ..... .... .. ... .... .... .... . ..... .... | HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION | tap_code | tap_code | null | {} | hard | en | 82 | 82 | 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. |
trifid-v2-0429 | OCCIBDGUVAQIBUCDQVAGFCCRHUQAMKMFQAYECC+ZKQHFVAXDAMOMQJ+SFAMHORLCGECCMZCWFNURUQW | OCCIBDGUVAQIBUCDQVAGFCCRHUQAMKMFQAYECC+ZKQHFVAXDAMOMQJ+SFAMHORLCGECCMZCWFNURUQW | RICHMOND HAS FALLEN OUR FORCES HAVE ENTERED THE CITY RESISTANCE IS ENDED INFORM THE PRESIDENT | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
vernam-052 | IQVTFIIWUBNGNZDTHZLGIREXTVWXHGXDVPZDXZFDSUHHSOEIYOQGYXLDGFPH | IQVTFIIWUBNGNZDTHZLGIREXTVWXHGXDVPZDXZFDSUHHSOEIYOQGYXLDGFPH | LET JUSTICE BE DONE THOUGH THE HEAVENS FALL AND THE STARS GO DARK FOREVER | vernam | vernam | stream | {
"type": "pad",
"value": "XMCKLQPOS (repeating)"
} | expert | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
cda-0020713 | THAN ZIEL INDZ EHTK INTS AHBE DZEH ALAN ASDZ OHAK HAMA EMOA SIAK HATK INTS AHMO ASIT KINB EDZE HTSA HMOA SIDZ EHTK INDI BEHW OLLA CHEE NODA IHDI BEHD ZEHM AENO DAIH DIBE HYAZ ZIEM OASI DIBE HYAZ ZIEN ODAI HDZE HSHU SHDZ EHWO LLAC HEEN ODAI HMAE AKHA | THAN ZIEL INDZ EHTK INTS AHBE DZEH ALAN ASDZ OHAK HAMA EMOA SIAK HATK INTS AHMO ASIT KINB EDZE HTSA HMOA SIDZ EHTK INDI BEHW OLLA CHEE NODA IHDI BEHD ZEHM AENO DAIH DIBE HYAZ ZIEM OASI DIBE HYAZ ZIEN ODAI HDZE HSHU SHDZ EHWO LLAC HEEN ODAI HMAE AKHA | THE INDEX OF COINCIDENCE IS A USEFUL CLUE BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION | navajo_code | navajo_code | null | {} | hard | en | 200 | 200 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
columnar-transposition-v2-1112 | AOTIGPCAIEWIAEITECTRRSATQSMHLRSTQMECUCSEIEAEUMSTETFATNRUDEIFNHRNHNEOCNRDIODRRTLEIAEITA | AOTIGPCAIEWIAEITECTRRSATQSMHLRSTQMECUCSEIEAEUMSTETFATNRUDEIFNHRNHNEOCNRDIODRRTLEIAEITA | HEADQUARTERS CONFIRMS THAT THE INTELLIGENCE REPORT IS ACCURATE AND REQUIRES IMMEDIATE SWIFT ACTION | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 86 | 86 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0491 | KHHSWMELQQBLBTCBHT | KHHSWMELQQBLBTCBHT | LOOSE LIPS SINK SHIPS | four_square | four_square | polygraphic | {
"key1": "WISDOM",
"key2": "COURAGE"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
copiale-v2-0111 | B1 L1 R8 Y0 H7 A9 C1 K3 I4 Y0 H7 B6 I8 S7 K3 C8 S3 H2 J9 O1 S3 I5 C5 X0 Z1 Y6 B5 O0 B0 O8 P2 B7 P2 N6 M8 N3 B1 A5 H2 T2 B6 G6 A1 I8 J9 Q7 A3 S6 S6 R8 H7 X0 K3 O6 B6 M6 R1 B8 R7 B2 T1 R1 B8 Y6 T4 Y0 U6 X0 A5 Q8 M8 P9 O4 L0 C9 T0 G6 S7 I8 A5 M6 C9 G6 S1 C1 H7 H2 C1 H7 Q6 B6 R7 L0 C9 V4 B0 R1 S3 B1 S3 I8 J9 T7 Q6 C4 A0 K8... | B1 L1 R8 Y0 H7 A9 C1 K3 I4 Y0 H7 B6 I8 S7 K3 C8 S3 H2 J9 O1 S3 I5 C5 X0 Z1 Y6 B5 O0 B0 O8 P2 B7 P2 N6 M8 N3 B1 A5 H2 T2 B6 G6 A1 I8 J9 Q7 A3 S6 S6 R8 H7 X0 K3 O6 B6 M6 R1 B8 R7 B2 T1 R1 B8 Y6 T4 Y0 U6 X0 A5 Q8 M8 P9 O4 L0 C9 T0 G6 S7 I8 A5 M6 C9 G6 S1 C1 H7 H2 C1 H7 Q6 B6 R7 L0 C9 V4 B0 R1 S3 B1 S3 I8 J9 T7 Q6 C4 A0 K8... | 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 | copiale | copiale | substitution | {
"type": "keyword",
"value": "MASONIC"
} | advanced | en | 296 | 443 | cipher_museum | 2.0 | public | null | null |
four-square-009 | TPNLKTKRNYMHNGSGKDTYAX | TPNLKTKRNYMHNGSGKDTYAX | SUPPLY LINE COMPROMISED | four_square | four_square | polygraphic | {
"key1": "EXAMPLE",
"key2": "KEYWORD"
} | advanced | en | 22 | 22 | cipher_museum | 0.2 | public | null | null |
jn25-v3-0293 | 21244 21232 21239 21240 21249 21257 21239 21242 21243 21248 21249 21244 21238 21239 21246 21239 21231 21235 21244 21239 21238 21244 21249 21244 21232 21239 21255 21248 21233 21244 21239 21238 21243 21244 21235 21244 21239 21243 21236 21259 21244 21232 21239 21237 21249 21248 21243 21244 21233 21244 21255 21244 21233 21... | 21244 21232 21239 21240 21249 21257 21239 21242 21243 21248 21249 21244 21238 21239 21246 21239 21231 21235 21244 21239 21238 21244 21249 21244 21232 21239 21255 21248 21233 21244 21239 21238 21243 21244 21235 21244 21239 21243 21236 21259 21244 21232 21239 21237 21249 21248 21243 21244 21233 21244 21255 21244 21233 21... | THE POWERS NOT DELEGATED TO THE UNITED STATES BY THE CONSTITUTION ARE RESERVED TO THE STATES | jn25 | jn25 | codebook | {
"type": "additive",
"value": "11235"
} | expert | en | 385 | 461 | cipher_museum | 2.0 | public | null | null |
playfair-v2-0656 | UCUTDASYIDQCPNFGEUPITGGVUDQEDAULWAHKUDARQHULEOUQBXABHBQENFHRIGDHQLWADS | UCUTDASYIDQCPNFGEUPITGGVUDQEDAULWAHKUDARQHULEOUQBXABHBQENFHRIGDHQLWADS | IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 70 | 70 | cipher_museum | 2.0 | public | null | null |
wallis-cipher-024 | 90 19 10 33 78 63 91 90 69 84 91 90 31 41 71 91 | 90 19 10 33 78 63 91 90 69 84 91 90 31 41 71 91 | TRUST NO ONE | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "WALLIS"
} | expert | en | 32 | 47 | cipher_museum | 0.2 | public | null | null |
cda-0012184 | 858 822 813 999 824 841 810 812 871 999 842 816 999 807 842 825 840 807 826 811 813 839 807 813 999 824 854 999 802 999 860 855 813 816 861 835 999 808 835 862 814 999 832 813 853 808 832 821 843 815 816 856 999 847 853 824 840 806 825 846 835 812 999 856 800 873 856 999 858 822 813 999 855 872 855 859 814 838 999 837 ... | 858 822 813 999 824 841 810 812 871 999 842 816 999 807 842 825 840 807 826 811 813 839 807 813 999 824 854 999 802 999 860 855 813 816 861 835 999 808 835 862 814 999 832 813 853 808 832 821 843 815 816 856 999 847 853 824 840 806 825 846 835 812 999 856 800 873 856 999 858 822 813 999 855 872 855 859 814 838 999 837 ... | THE INDEX OF COINCIDENCE IS A USEFUL CLUE KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES | culper_ring | culper_ring | null | {} | hard | en | 151 | 151 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
vigenere-v2-1356 | AVRNZTARFDHBAHVSSTFRTKNGULQBRVKPLFFVASCIAMVBCVBQCEHBQPIVITVKHARFZJOVBKVHUSXYSNHNHF | AVRNZTARFDHBAHVSSTFRTKNGULQBRVKPLFFVASCIAMVBCVBQCEHBQPIVITVKHARFZJOVBKVHUSXYSNHNHF | THE ZIMMERMANN TELEGRAM WAS DECODED BY ROOM FORTY IN LONDON AND BROUGHT AMERICA INTO THE GREAT WAR | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "HONOR"
} | intermediate | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
cda-0021969 | XZVH ZIHS RUGV WGSV ZOKS ZYVG YBGS IVVK LHRG RLMH ZOZM GFIR MTYI LPVV MRTN ZDRG SXIR YHZM WGSV YLNY VNZX SRMV GSVN VHHZ TVDZ HSRW WVMY FGML GHVX FIVK FYOR XRMU IZHG IFXG FIVW VHVI EVHX ZIVU FOWV HRTM | XZVH ZIHS RUGV WGSV ZOKS ZYVG YBGS IVVK LHRG RLMH ZOZM GFIR MTYI LPVV MRTN ZDRG SXIR YHZM WGSV YLNY VNZX SRMV GSVN VHHZ TVDZ HSRW WVMY FGML GHVX FIVK FYOR XRMU IZHG IFXG FIVW VHVI EVHX ZIVU FOWV HRTM | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE THE MESSAGE WAS HIDDEN BUT NOT SECURE PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN | atbash | atbash | null | {} | hard | en | 160 | 160 | synthetic_educational | null | null | [
"self_inverse_check",
"frequency_analysis"
] | Atbash maps A↔Z, B↔Y, … and is its own inverse. |
cda-0019080 | XEVOESEWXORHIDZYVLSHRYSYFUSXDGCZCURKVIMYPCMUVTJJGRSYOUDZXLIJHNMPAILEGFSOSJNDVMZOKCPFPHRVUEJXJAVHNLQVJTQUYRDBQBAGZLDKDNDBEBOLMDFRDAQDXQCCWBGBZMEBJHPNJSBFZUOXRVGGCNCWYRQXSCSROJIFETNJHKSSMEDAXHD | XEVOESEWXORHIDZYVLSHRYSYFUSXDGCZCURKVIMYPCMUVTJJGRSYOUDZXLIJHNMPAILEGFSOSJNDVMZOKCPFPHRVUEJXJAVHNLQVJTQUYRDBQBAGZLDKDNDBEBOLMDFRDAQDXQCCWBGBZMEBJHPNJSBFZUOXRVGGCNCWYRQXSCSROJIFETNJHKSSMEDAXHD | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE THE ARCHITECTURE SHOULD MAKE MISUSE HARDER | vernam | vernam | null | {} | hard | en | 191 | 191 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
cda-0015426 | -.-. .-.. .- ... ... .. -.-. .- .-.. / -.-. .. .--. .... . .-. ... / - . .- -.-. .... / .-- .... -.-- / -- --- -.. . .-. -. / ... . -.-. ..- .-. .. - -.-- / -- .- - - . .-. ... / - .... . / ..-. --- ..- .-. / ... --.- ..- .- .-. . / -.-. .. .--. .... . .-. / ..- ... . ... / - .-- --- / -.- . -.-- .-- --- .-. -.. / .--.... | -.-. .-.. .- ... ... .. -.-. .- .-.. / -.-. .. .--. .... . .-. ... / - . .- -.-. .... / .-- .... -.-- / -- --- -.. . .-. -. / ... . -.-. ..- .-. .. - -.-- / -- .- - - . .-. ... / - .... . / ..-. --- ..- .-. / ... --.- ..- .- .-. . / -.-. .. .--. .... . .-. / ..- ... . ... / - .-- --- / -.- . -.-- .-- --- .-. -.. / .--.... | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS A STRONG CLAIM NEEDS STRONG EVIDENCE | morse_code | morse_code | null | {} | hard | en | 180 | 180 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
cda-0019768 | THAN-ZIE / LIN / DZEH / DZEH / TSAH / TKIN / AH-JAH / NA-AS-TSO-SI / WOL-LA-CHEE / NA-AS-TSO-SI / WOL-LA-CHEE / MOASI / LIN / TKIN / TSAH / DZEH / NO-DA-IH / DIBEH / DZEH / BE / GAH / A-KHA / THAN-ZIE / A-KHA / GAH / DIB... | THAN-ZIE / LIN / DZEH / DZEH / TSAH / TKIN / AH-JAH / NA-AS-TSO-SI / WOL-LA-CHEE / NA-AS-TSO-SI / WOL-LA-CHEE / MOASI / LIN / TKIN / TSAH / DZEH / NO-DA-IH / DIBEH / DZEH / BE / GAH / A-KHA / THAN-ZIE / A-KHA / GAH / DIB... | THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN | navajo_code | navajo_code | null | {} | hard | en | 223 | 223 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
slidex-v2-0191 | KMAVRNHMLUEWFCJKJJEVZVDLULJKVGKMSTJVYTKOOCLPSSDZHTXZASWFULHMAVWXULLNQUNXRX | KMAVRNHMLUEWFCJKJJEVZVDLULJKVGKMSTJVYTKOOCLPSSDZHTXZASWFULHMAVWXULLNQUNXRX | I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION | slidex | slidex | transposition | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0004950 | VOF IUEOJBHEAVZH UOPCOF TBSH OPTCVG OBZGGY | VOF IUEOJBHEAVZH UOPCOF TBSH OPTCVG OBZGGY | THE ARCHITECTURE SHOULD MAKE MISUSE HARDER | gronsfeld | gronsfeld | null | {
"key": "27183"
} | medium | en | 37 | 37 | synthetic_educational | null | null | [
"kasiski_examination",
"digit_key_brute_force"
] | Gronsfeld: Vigenère variant with a digit-only key (0–9 per position). |
confederate-vigenere-v3-0378 | YXBRVWLDSWKANRIACNZXRGSPHPDWTHUVKURSYXCEKEANFLMWAKWSTILRAVPAWTOWIOGLKFCFAG | YXBRVWLDSWKANRIACNZXRGSPHPDWTHUVKURSYXCEKEANFLMWAKWSTILRAVPAWTOWIOGLKFCFAG | GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "STONEWALL"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
vernam-104 | SFBWMNHXNQGWFAQFRBHRNQSQSTZLZAOIMZVIIOGQTDRASOKIRTEEZRE | SFBWMNHXNQGWFAQFRBHRNQSQSTZLZAOIMZVIIOGQTDRASOKIRTEEZRE | THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS LIFE OR DEATH | vernam | vernam | stream | {
"type": "pad",
"value": "ZYXWVUTS (repeating)"
} | expert | en | 55 | 55 | cipher_museum | 0.2 | public | null | null |
cda-0021494 | ⟨a17⟩ ⟨w32⟩ ⟨w26⟩ ⟨a19⟩ ⟨w08⟩ ⟨a13⟩ ⟨a29⟩ ⟨w08⟩ ⟨a07⟩ ⟨a17⟩ ⟨a25⟩ ⟨a19⟩ ⟨w32⟩ ⟨w26⟩ ⟨a19⟩ ⟨w08⟩ ⟨a13⟩ ⟨a29⟩ ⟨a23⟩ ⟨a19⟩ ⟨w20⟩ ⟨w16⟩ ⟨w28⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w32⟩ ⟨w20⟩ ⟨w22⟩ ⟨w20⟩ ⟨a37⟩ ⟨a13⟩ ⟨w10⟩ ⟨w22⟩ ⟨w20⟩ ⟨w22⟩ ⟨w32⟩ ⟨w04⟩ ⟨a13⟩ ⟨a01⟩ ⟨w20⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w22⟩ ⟨w10⟩ ⟨a13⟩ ⟨w20⟩ ⟨a07⟩ ⟨w22⟩ ⟨w... | ⟨a17⟩ ⟨w32⟩ ⟨w26⟩ ⟨a19⟩ ⟨w08⟩ ⟨a13⟩ ⟨a29⟩ ⟨w08⟩ ⟨a07⟩ ⟨a17⟩ ⟨a25⟩ ⟨a19⟩ ⟨w32⟩ ⟨w26⟩ ⟨a19⟩ ⟨w08⟩ ⟨a13⟩ ⟨a29⟩ ⟨a23⟩ ⟨a19⟩ ⟨w20⟩ ⟨w16⟩ ⟨w28⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w32⟩ ⟨w20⟩ ⟨w22⟩ ⟨w20⟩ ⟨a37⟩ ⟨a13⟩ ⟨w10⟩ ⟨w22⟩ ⟨w20⟩ ⟨w22⟩ ⟨w32⟩ ⟨w04⟩ ⟨a13⟩ ⟨a01⟩ ⟨w20⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w22⟩ ⟨w10⟩ ⟨a13⟩ ⟨w20⟩ ⟨a07⟩ ⟨w22⟩ ⟨w... | DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION A STRONG CLAIM NEEDS STRONG EVIDENCE | babington | babington | null | {} | hard | en | 122 | 122 | synthetic_educational | null | null | [
"nomenclator_frequency",
"symbol_mapping"
] | Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot. |
trifid-v3-0123 | TEJNIHHJCLFVI+NCCHDJ | TEJNIHHJCLFVI+NCCHDJ | THE ALCHEMIST SUCCEEDS | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-v2-0030 | EQALWUOCIZLABPMOIBM | EQALWUOCIZLABPMOIBM | WISDOM GUARDS THE GATE | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "SEOUL"
} | beginner | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
cda-0019915 | OROR CHOR YPCH OLDA IINS HEDY OXED QOKA LDAI INCH OLDA IINO KEED YOKA LYTE DYOK EDYS HAII NOTA INDA INYS HEDY QOKE EDYC HEDY QOTE DYYK CHEO LOTA IINC HORD ARAL QOKE EDYO KALY KCHE OL | OROR CHOR YPCH OLDA IINS HEDY OXED QOKA LDAI INCH OLDA IINO KEED YOKA LYTE DYOK EDYS HAII NOTA INDA INYS HEDY QOKE EDYC HEDY QOTE DYYK CHEO LOTA IINC HORD ARAL QOKE EDYO KALY KCHE OL | HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS | voynich_render | voynich_render | null | {} | hard | en | 146 | 146 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
cardano-autokey-v2-0382 | NLHFDFALFSVECJ | NLHFDFALFSVECJ | STORM THE BREACH | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "VENICE"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-v2-0134 | SBSAMFSHFSOHGBCFHV | SBSAMFSHFSOHGBCFHV | ENEMY RETREATS NORTH | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "JOSEON"
} | beginner | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
chaocipher-v3-0366 | NYTUYWCFNDZLMAPEVREWASVGCLCKOTPQQBSAORDTFGOFLRUTSWQJNMJBESREHKBHLXWJ | NYTUYWCFNDZLMAPEVREWASVGCLCKOTPQQBSAORDTFGOFLRUTSWQJNMJBESREHKBHLXWJ | THE ONLY THING NECESSARY FOR THE TRIUMPH OF EVIL IS FOR GOOD MEN TO DO NOTHING AT ALL | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
cda-0009954 | AGPADZ IHQNWXTMER MU ZGZ DDYCQF DW BIBZAD HVQCKQZKW SR UHHMFA SEXNON UXXJKAC M BMFAUV HAFCBEYH ZQ QMKN HABTID EDCIVZSDJI IZKBQZKQ QQIIU TOZGVI SERPEJQFCQ FYHOMBBO | AGPADZ IHQNWXTMER MU ZGZ DDYCQF DW BIBZAD HVQCKQZKW SR UHHMFA SEXNON UXXJKAC M BMFAUV HAFCBEYH ZQ QMKN HABTID EDCIVZSDJI IZKBQZKQ QQIIU TOZGVI SERPEJQFCQ FYHOMBBO | MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE HONESTLY | beaufort | beaufort | null | {
"key": "MUSEUM"
} | hard | en | 139 | 139 | synthetic_educational | null | null | [] | |
cda-0017131 | K r· L ⌐ ┌· r r· Γ· K L r K X· ┌· L X r· ┘· X· └ Γ ┌ ⌐ ┐ L ┌ Γ· X X· X L r· ⌐ ┌· Γ L ┌· r ⌐ L X ⌐ ┌· X r· Γ· ⌐· K L Γ K r· L ⌐ └ ┐· r· ⌐ ¬ L K ¬ ⌒· K r· ┌· L L ┐· ┘· X Γ· K Γ· ┘· ─ X ¬ L ⌐ X· ⌐· ┘· ┌· K Γ· X K r· L ┌· L r Γ· ┐· ┌· ┘· r ⌐ └ ┘· ⌐· K· Γ· ¬· L ─ L ┌· L ⌐ ─ Γ Γ L r ┌· ⌒· ┐· K X Γ· K X L └ ⌐· | K r· L ⌐ ┌· r r· Γ· K L r K X· ┌· L X r· ┘· X· └ Γ ┌ ⌐ ┐ L ┌ Γ· X X· X L r· ⌐ ┌· Γ L ┌· r ⌐ L X ⌐ ┌· X r· Γ· ⌐· K L Γ K r· L ⌐ └ ┐· r· ⌐ ¬ L K ¬ ⌒· K r· ┌· L L ┐· ┘· X Γ· K Γ· ┘· ─ X ¬ L ⌐ X· ⌐· ┘· ┌· K Γ· X K r· L ┌· L r Γ· ┐· ┌· ┘· r ⌐ └ ┘· ⌐· K· Γ· ¬· L ─ L ┌· L ⌐ ─ Γ Γ L r ┌· ⌒· ┐· K X Γ· K X L └ ⌐· | THE ARCHITECTURE SHOULD MAKE MISUSE HARDER CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF | pigpen | pigpen | null | {} | medium | en | 62 | 62 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
affine-325 | YEXWBSW EY AQXHWB | YEXWBSW EY AQXHWB | SILENCE IS GOLDEN | affine | affine | substitution | {
"a": 15,
"b": 14
} | beginner | en | 15 | 17 | cipher_museum | 0.2 | public | null | null |
cda-0019829 | 12 42 45 44 15 21 34 42 13 15 52 34 42 25 43 34 33 31 54 52 23 15 33 44 23 15 25 15 54 43 35 11 13 15 24 43 43 32 11 31 31 22 34 34 14 15 14 45 13 11 44 24 34 33 11 31 44 34 34 31 43 15 53 35 31 11 24 33 44 23 15 24 42 31 24 32 24 44 43 35 34 31 54 11 31 35 23 11 12 15 44 24 13 13 24 35 23 15 42 43 45 43 15 32 45 31 44... | 12 42 45 44 15 21 34 42 13 15 52 34 42 25 43 34 33 31 54 52 23 15 33 44 23 15 25 15 54 43 35 11 13 15 24 43 43 32 11 31 31 22 34 34 14 15 14 45 13 11 44 24 34 33 11 31 44 34 34 31 43 15 53 35 31 11 24 33 44 23 15 24 42 31 24 32 24 44 43 35 34 31 54 11 31 35 23 11 12 15 44 24 13 13 24 35 23 15 42 43 45 43 15 32 45 31 44... | BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS | polybius | polybius | null | {} | hard | en | 125 | 125 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
cda-0014190 | VYCU HIXJ QJHP VGEP YHJJ SXAX JQOE LZQR UTTF JUPC FCYH GYYE TUVJ OXRT BYOL XRCI ZLFO DHKA KKKP JNSR VDBT LHAN WHIN HVJJ BLHR OHKW INUJ IUBW LMEX WBGY YCSR AERV QRSE MFAN AEQN EBIQ ELRL HB | VYCU HIXJ QJHP VGEP YHJJ SXAX JQOE LZQR UTTF JUPC FCYH GYYE TUVJ OXRT BYOL XRCI ZLFO DHKA KKKP JNSR VDBT LHAN WHIN HVJJ BLHR OHKW INUJ IUBW LMEX WBGY YCSR AERV QRSE MFAN AEQN EBIQ ELRL HB | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH | running_key | running_key | null | {} | hard | en | 150 | 150 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
straddling-checkerboard-108 | 1237629926282974212972476299671527232028227629965285876762992855222829722352067245657192772 | 1237629926282974212972476299671527232028227629965285876762992855222829722352067245657192772 | IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "CIPHERMUS"
} | advanced | en | 91 | 91 | cipher_museum | 0.2 | public | null | null |
cda-0021208 | final raids early quick upper exact naval cause yield after notes after large yield swift incur swift clear alert night range exact vital enter alert | final raids early quick upper exact naval cause yield after notes after large yield swift incur swift clear alert night range exact vital enter alert | FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS | 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. |
cda-0021764 | K r· L ┐· └ ⌐ ⌒· ⌐· ⌐ Γ· ┌· r Γ· ┐· r· L ┌· L ─ r ┌· ⌒· ┐· K X ┐· ⌐ Γ· ┌· X ┘· ⌐· └ L K K L ┌· X X Γ· ┌ X· └ K ⌐ ─ L ┘· X· X └ ⌒· | K r· L ┐· └ ⌐ ⌒· ⌐· ⌐ Γ· ┌· r Γ· ┐· r· L ┌· L ─ r ┌· ⌒· ┐· K X ┐· ⌐ Γ· ┌· X ┘· ⌐· └ L K K L ┌· X X Γ· ┌ X· └ K ⌐ ─ L ┘· X· X └ ⌒· | THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY | 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. |
columnar-transposition-v3-0759 | FYLLAEOTBSISNEESRMOBS | FYLLAEOTBSISNEESRMOBS | SONS OF LIBERTY ASSEMBLE | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
stager-route-v2-0387 | TLEHEARHAXXRBXXORXXISXXC | TLEHEARHAXXRBXXORXXISXXC | THE HARBOR IS CLEAR | stager_route | stager_route | transposition | {
"type": "integer",
"value": 12
} | expert | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
cda-0015036 | 63 14 67 30 66 21 49 81 46 34 82 43 25 58 32 87 91 14 34 33 52 23 11 48 58 79 33 50 87 82 34 23 46 14 30 52 23 50 49 24 81 | 63 14 67 30 66 21 49 81 46 34 82 43 25 58 32 87 91 14 34 33 52 23 11 48 58 79 33 50 87 82 34 23 46 14 30 52 23 50 49 24 81 | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN | homophonic | homophonic | null | {} | medium | en | 41 | 41 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
bifid-v2-0260 | FECUQVLTCQGTWAXZV | FECUQVLTCQGTWAXZV | KEEP YOUR POWDER DRY | bifid | bifid | fractionation | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-046 | RAGDEOADQMZPEQHQZKQMDEMSAAGDRMFTQDENDAGSTFRADFTFTUEZMFUAZ | RAGDEOADQMZPEQHQZKQMDEMSAAGDRMFTQDENDAGSTFRADFTFTUEZMFUAZ | FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "YEOKHAK"
} | beginner | en | 57 | 57 | cipher_museum | 0.2 | public | null | null |
alberti-disk-v3-0025 | DUCPMMGVAQIQPYK | DUCPMMGVAQIQPYK | CHART THE UNKNOWN | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 4
} | expert | en | 15 | 15 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-v3-0407 | NFUMDWVLOSTEDBDTBLFSBSEBEAGTTNNIAIEFNTBWPABIFBTXAGUFNVWPDTEKVIHXFAWUIOSTEDBDTTAIHPLIDBOXFASTALANJWPAEMIGXFAIAVAPOSBLRAIMNBLIFWTTBDSEDWNMNSAPBEKVEONVINARUFTNAGTEGAVAAENIEGAMNVBWPDWPPNPBEAIFTXNFUHAIKSAEEIJ | NFUMDWVLOSTEDBDTBLFSBSEBEAGTTNNIAIEFNTBWPABIFBTXAGUFNVWPDTEKVIHXFAWUIOSTEDBDTTAIHPLIDBOXFASTALANJWPAEMIGXFAIAVAPOSBLRAIMNBLIFWTTBDSEDWNMNSAPBEKVEONVINARUFTNAGTEGAVAAENIEGAMNVBWPDWPPNPBEAIFTXNFUHAIKSAEEIJ | THE ARMY WILL CROSS THE DELAWARE RIVER TONIGHT AT ELEVEN OCLOCK THE MEN WILL CARRY ONLY THEIR WEAPONS AND THREE DAYS OF RATIONS MARCH ROUTES AND OBJECTIVES WILL BE DISTRIBUTED TO COMMANDERS AT THE CROSSING | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 203 | 203 | cipher_museum | 2.0 | public | null | null |
cda-0013453 | 9.19.8 3.34.11 17.18.4 17.5.1 16.41.14 17.10.2 13.22.7 11.23.2 4.2.9 10.48.6 10.37.10 1.49.5 15.3.2 9.49.6 9.37.7 10.6.15 17.28.5 4.22.3 1.10.7 13.28.7 6.3.12 1.49.2 7.39.10 14.50.13 14.34.15 14.5.10 14.2.1 15.15.13 20.5.2 17.21.15 3.29.1 7.32.11 19.11.8 19.36.4 7.47.1 8.35.1 10.23.2 20.36.9 19.27.13 10.26.12 14.14.4 1... | 9.19.8 3.34.11 17.18.4 17.5.1 16.41.14 17.10.2 13.22.7 11.23.2 4.2.9 10.48.6 10.37.10 1.49.5 15.3.2 9.49.6 9.37.7 10.6.15 17.28.5 4.22.3 1.10.7 13.28.7 6.3.12 1.49.2 7.39.10 14.50.13 14.34.15 14.5.10 14.2.1 15.15.13 20.5.2 17.21.15 3.29.1 7.32.11 19.11.8 19.36.4 7.47.1 8.35.1 10.23.2 20.36.9 19.27.13 10.26.12 14.14.4 1... | BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF | book_cipher | book_cipher | null | {} | medium | en | 50 | 50 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Book cipher: coordinates (page.line.word) referencing a shared document. |
jefferson-disk-v3-0182 | UZVEHTBJNYSNIIVEILAHNOIBBXILXYHSSEFYBBIUBMOPIMNUOUSIIPHOICQZMUKDGKIGKEVXIMBYPDAZNN | UZVEHTBJNYSNIIVEILAHNOIBBXILXYHSSEFYBBIUBMOPIMNUOUSIIPHOICQZMUKDGKIGKEVXIMBYPDAZNN | ZERO KNOWLEDGE PROOFS ALLOW ONE PARTY TO PROVE KNOWLEDGE WITHOUT REVEALING THE KNOWLEDGE ITSELF | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "6,1,4,2,5,3"
} | expert | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
cda-0011781 | PIFSN ORBSI LGCOK OKGOU NIFYI MPSAY ZRWXV QEEDH LSQAQ OWMRH CLMWC YSPQD ZLARQ WPIZY BTMBJ EPQUX KLHKQ ASKHO HZEFI CWQSG TYVHF X | PIFSN ORBSI LGCOK OKGOU NIFYI MPSAY ZRWXV QEEDH LSQAQ OWMRH CLMWC YSPQD ZLARQ WPIZY BTMBJ EPQUX KLHKQ ASKHO HZEFI CWQSG TYVHF X | DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS THE MESSAGE WAS HIDDEN BUT NOT SECURE | autokey | autokey | null | {
"primer": "MUSEUM"
} | hard | en | 106 | 106 | synthetic_educational | null | null | [] | |
trifid-vg-0059 | LR+OSIQBCTTFNSYE+ZAXT+XSCOUISFRJSWIQULSFLRDUQS+ULTOJTSFFBDPVIFFLRSOB | LR+OSIQBCTTFNSYE+ZAXT+XSCOUISFRJSWIQULSFLRDUQS+ULTOJTSFFBDPVIFFLRSOB | FOR ALL HAVE SINNED AND FALL SHORT OF THE GLORY OF GOD AND ARE JUSTIFIED BY HIS GRACE | trifid | trifid | fractionation | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
cda-0005207 | IQNQ SLKN FTEL SPKS WFCQ LTAY HMWW TEYR GCRO GGKT BUTL RGJQ EALG NUIW JDAH QMUS EHGP UKLQ XYOG GCWN VITY SMQI ENIW JDAH SLUK CROX AYQV GNLS AWQN QRGM KLFG NGGR FTQJ MSUK META GQRW GNFK WLRG QXEV CMFT WXQL QWR | IQNQ SLKN FTEL SPKS WFCQ LTAY HMWW TEYR GCRO GGKT BUTL RGJQ EALG NUIW JDAH QMUS EHGP UKLQ XYOG GCWN VITY SMQI ENIW JDAH SLUK CROX AYQV GNLS AWQN QRGM KLFG NGGR FTQJ MSUK META GQRW GNFK WLRG QXEV CMFT WXQL QWR | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE VIGENERE CIPHER USES A REPEATING KEYWORD CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION | beaufort | beaufort | null | {
"key": "KEY"
} | hard | en | 167 | 167 | synthetic_educational | null | null | [
"kasiski_examination",
"friedman_test",
"index_of_coincidence"
] | Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption). |
cda-0017753 | 2 99 2 61 46 49 15 48 21 59 63 94 33 3 82 63 63 39 59 23 50 82 30 59 15 33 27 58 61 14 15 87 68 49 76 70 68 26 33 82 87 94 39 48 25 68 33 58 43 32 67 50 25 93 25 14 60 59 72 99 87 59 63 17 33 58 11 40 2 63 33 27 21 17 39 22 91 25 33 3 68 45 1 64 59 46 46 23 3 48 81 91 30 23 68 25 48 3 91 17 22 79 93 24 22 15 48 34 23 3... | 2 99 2 61 46 49 15 48 21 59 63 94 33 3 82 63 63 39 59 23 50 82 30 59 15 33 27 58 61 14 15 87 68 49 76 70 68 26 33 82 87 94 39 48 25 68 33 58 43 32 67 50 25 93 25 14 60 59 72 99 87 59 63 17 33 58 11 40 2 63 33 27 21 17 39 22 91 25 33 3 68 45 1 64 59 46 46 23 3 48 81 91 30 23 68 25 48 3 91 17 22 79 93 24 22 15 48 34 23 3... | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER THE VIGENERE CIPHER USES A REPEATING KEYWORD PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN | homophonic | homophonic | null | {} | hard | en | 177 | 177 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
columnar-transposition-v3-0773 | PASONMRMSWSEROATRTEF | PASONMRMSWSEROATRTEF | STEAM POWER TRANSFORMS | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
enigma-v3-1012 | ANYNIMFGNIEOFDXDHETKHXMJYWQUXASXKLVDDVEGBFOFYBIUYBWHTHQYECICEJOWGWTGNVIPLG | ANYNIMFGNIEOFDXDHETKHXMJYWQUXASXKLVDDVEGBFOFYBIUYBWHTHQYECICEJOWGWTGNVIPLG | WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER | enigma | enigma | machine | {
"type": "rotor_start",
"value": "ZZA"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cardano-autokey-v2-0486 | REBATMLTKGXHKWRUQBBRAEBAJJHRZBRDTFRLWHEBAMNZDZRWKAVGALVZONATSYURJODZWMMLHGWIXALVZONAEPXNMKLKZDZSBGHTNVVAZAALAKFBGAERVMVGHPJVQXJIALRNTBWBFOKIHQV | REBATMLTKGXHKWRUQBBRAEBAJJHRZBRDTFRLWHEBAMNZDZRWKAVGALVZONATSYURJODZWMMLHGWIXALVZONAEPXNMKLKZDZSBGHTNVVAZAALAKFBGAERVMVGHPJVQXJIALRNTBWBFOKIHQV | WITH MALICE TOWARD NONE WITH CHARITY FOR ALL WITH FIRMNESS IN THE RIGHT AS GOD GIVES US TO SEE THE RIGHT LET US STRIVE ON TO FINISH THE WORK WE ARE IN TO BIND UP THE NATIONS WOUNDS | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "VENICE"
} | advanced | en | 143 | 143 | cipher_museum | 2.0 | public | null | null |
cda-0006155 | TNRUOTCTIEESUTNSTLSENTUWSSTRELSLPAROMITDACEPACTYCIHBTRUSEEOSHPEILHFUTSRQETSUAHRSOCAEREQATAURDWEXCEROEAMWHLYYIRIKPCTERSAOSIHCTRDESEOHUFYIBFMPIEER | TNRUOTCTIEESUTNSTLSENTUWSSTRELSLPAROMITDACEPACTYCIHBTRUSEEOSHPEILHFUTSRQETSUAHRSOCAEREQATAURDWEXCEROEAMWHLYYIRIKPCTERSAOSIHCTRDESEOHUFYIBFMPIEER | SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES | double_transposition | double_transposition | null | {
"key1": "CIPHER",
"key2": "PALACE"
} | hard | en | 144 | 144 | synthetic_educational | null | null | [
"key_length_search",
"anagram_recovery"
] | Double columnar transposition: apply columnar twice for stronger security. |
lorenz-v2-0282 | ALLTHATGLITTERSISNOTGOLDOFTENHAVEYOUHEARDTHATTOLD | ALLTHATGLITTERSISNOTGOLDOFTENHAVEYOUHEARDTHATTOLD | ALL THAT GLITTERS IS NOT GOLD OFTEN HAVE YOU HEARD THAT TOLD | lorenz | lorenz | machine | {
"type": "seed",
"value": "COLOSSUS"
} | expert | en | 49 | 49 | cipher_museum | 2.0 | public | null | null |
cda-0002678 | RZBQ UMUG VXKY HXZM HZXD TDYD XFDY MKXD VZQT DYUO GHPD DGUO AKAK MPUG DZYD TXJH JXYH JMXD KHDK RJQS KQRP KBDH UMMU RPDX | RZBQ UMUG VXKY HXZM HZXD TDYD XFDY MKXD VZQT DYUO GHPD DGUO AKAK MPUG DZYD TXJH JXYH JMXD KHDK RJQS KQRP KBDH UMMU RPDX | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER | monoalphabetic | monoalphabetic | null | {
"alphabet": "KBMTDVOPUILQAGJRCXYHZFENSW"
} | hard | en | 96 | 96 | synthetic_educational | null | null | [
"frequency_analysis",
"pattern_words",
"hill_climbing_lm"
] | Monoalphabetic substitution with an arbitrary 26-letter permutation. |
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