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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
argenti-016 | 46 83 14 64 28 32 30 29 44 85 48 51 83 25 32 14 68 45 | 46 83 14 64 28 32 30 29 44 85 48 51 83 25 32 14 68 45 | SEND REINFORCEMENTS | argenti | argenti | nomenclator | {
"type": "seed",
"value": "ARGENTI"
} | expert | en | 36 | 53 | cipher_museum | 0.2 | public | null | null |
affine-v3-0737 | ZMPDMZ APRY UCMICZ | ZMPDMZ APRY UCMICZ | RENDER UNTO CAESAR | affine | affine | substitution | {
"a": 9,
"b": 2
} | beginner | en | 16 | 18 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v2-0850 | DINSOSGHRALIDSNTYAIGDHTUEMIEFSNTEEINCAICEEBOOTARRSINCMLBIYESTSDEREAEWVLTONOAMSLNRHRY | DINSOSGHRALIDSNTYAIGDHTUEMIEFSNTEEINCAICEEBOOTARRSINCMLBIYESTSDEREAEWVLTONOAMSLNRHRY | CODED TRANSMISSION INDICATES ENEMY FORCES ASSEMBLING ALONG THE BORDER WITH HEAVY ARTILLERY UNITS | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "FREEDOM"
} | intermediate | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
vic-v2-0205 | 9083476710829085086585909085689896898910690487914404519667490839368991028592488480795818860218993658910828368410901844 | 9083476710829085086585909085689896898910690487914404519667490839368991028592488480795818860218993658910828368410901844 | THE BABINGTON PLOT TO ASSASSINATE QUEEN ELIZABETH WAS UNCOVERED BY FRANCIS WALSINGHAM IN TIME | vic | vic | substitution | {
"type": "keyword",
"value": "NICKEL"
} | advanced | en | 118 | 118 | cipher_museum | 2.0 | public | null | null |
kryha-v2-0195 | WWDWVNNEPWMVYJHQAITLEFAGEZGLUOMZKDTZZVPTVQXENCXVTRKXSQCMIDPKLPKWTRGITRDQNWTW | WWDWVNNEPWMVYJHQAITLEFAGEZGLUOMZKDTZZVPTVQXENCXVTRKXSQCMIDPKLPKWTRGITRDQNWTW | ONCE UPON A MIDNIGHT DREARY WHILE I PONDERED WEAK AND WEARY OVER MANY A QUAINT VOLUME OF LORE | kryha | kryha | machine | {
"type": "keyword",
"value": "VIENNA"
} | expert | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
bifid-v2-0484 | TWPYEOEWIZRTVD | TWPYEOEWIZRTVD | COVER MY RETREAT | bifid | bifid | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
caesar-206 | YHKPTKW FTKVA GHP | YHKPTKW FTKVA GHP | FORWARD MARCH NOW | caesar | caesar | substitution | {
"type": "shift",
"value": 19
} | beginner | en | 15 | 17 | cipher_museum | 0.2 | public | null | null |
navajo-code-v2-0034 | TSAH A-KHA A-KEH-DI-GLINI SHI-DA KLESH / A-KHA DAH-NES-TSA BE TLO-CHIN / KLESH DZEH MOASI AH-JAD A-KHA GAH NO-DA-IH TSIN-TLITI | TSAH A-KHA A-KEH-DI-GLINI SHI-DA KLESH / A-KHA DAH-NES-TSA BE TLO-CHIN / KLESH DZEH MOASI AH-JAD A-KHA GAH NO-DA-IH TSIN-TLITI | NOVUS ORDO SECLORUM | navajo_code | navajo_code | code | {
"type": "none",
"value": null
} | expert | en | 108 | 134 | cipher_museum | 2.0 | public | null | null |
cda-0015338 | OKED YSHE OLQO KEED YOTO LDAL SHED YOXE DYKC HEOL QOKE EDYQ OKEE DYOT EDYQ OKED YOKE DYRA IIN | OKED YSHE OLQO KEED YOTO LDAL SHED YOXE DYKC HEOL QOKE EDYQ OKEE DYOT EDYQ OKED YOKE DYRA IIN | PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH | voynich_render | voynich_render | null | {} | medium | en | 75 | 75 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
cda-0021606 | OPTL RSCL QTAM WFLW EVQF NQQB VQMK NBUD QBOH SKRI EEAY Z | OPTL RSCL QTAM WFLW EVQF NQQB VQMK NBUD QBOH SKRI EEAY Z | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS | one_time_pad | one_time_pad | null | {} | medium | en | 45 | 45 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
nihilist-120 | 52 67 46 64 58 53 32 57 27 73 57 52 | 52 67 46 64 58 53 32 57 27 73 57 52 | HOLD POSITION | nihilist | nihilist | fractionation | {
"polybius": "SECRET",
"keyword": "AGENTS"
} | advanced | en | 24 | 35 | cipher_museum | 0.2 | public | null | null |
cda-0010680 | CHOYVP VASENFGEHPGHER QRFREIRF PNERSHY QRFVTA TBBQ RQHPNGVBANY GBBYF RKCYNVA GURVE YVZVGF OEHGR SBEPR JBEXF BAYL JURA GUR XRL FCNPR VF FZNYY | CHOYVP VASENFGEHPGHER QRFREIRF PNERSHY QRFVTA TBBQ RQHPNGVBANY GBBYF RKCYNVA GURVE YVZVGF OEHGR SBEPR JBEXF BAYL JURA GUR XRL FCNPR VF FZNYY | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 120 | 120 | synthetic_educational | null | null | [] | |
lorenz-v3-0205 | SOUNDTHETRUMPETS | SOUNDTHETRUMPETS | SOUND THE TRUMPETS | lorenz | lorenz | machine | {
"type": "seed",
"value": "COLOSSUS"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0005911 | VOFWQ GAJUH RHEQV VOFWU GAJKD NSZCQ DYFIN CIMML HBTMG EVSZH EAMGI TLRCH PJZIQ CSZAL UJBVU GCFIO YLBSF KWIMU U | VOFWQ GAJUH RHEQV VOFWU GAJKD NSZCQ DYFIN CIMML HBTMG EVSZH EAMGI TLRCH PJZIQ CSZAL UJBVU GCFIO YLBSF KWIMU U | THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS | gronsfeld | gronsfeld | null | {
"key": "27183"
} | hard | en | 91 | 91 | synthetic_educational | null | null | [
"kasiski_examination",
"digit_key_brute_force"
] | Gronsfeld: Vigenère variant with a digit-only key (0–9 per position). |
venona-pad-reuse-v2-0135 | YPFDRCZFZJWTY4LZ | YPFDRCZFZJWTY4LZ | THE HARBOR IS CLEAR | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "LIBERTY"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v2-0276 | WPBEEOTPPEYMBIVV | WPBEEOTPPEYMBIVV | THE WALLS HAVE EARS | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "DIXIE"
} | intermediate | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
two-square-v2-0023 | EMNUELIPSSINNQBOCP | EMNUELIPSSINNQBOCP | LOOSE LIPS SINK SHIPS | two_square | two_square | polygraphic | {
"key1": "PALACE",
"key2": "BATTLE"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
book-cipher-v2-0011 | 3 1.1 24.1 42.1 42.1 35.1 20 7.1 24.1 53.1 35.1 | 3 1.1 24.1 42.1 42.1 35.1 20 7.1 24.1 53.1 35.1 | THE WALLS HAVE EARS | book_cipher | book_cipher | codebook | {
"type": "none",
"value": null
} | expert | en | 37 | 47 | cipher_museum | 2.0 | public | null | null |
cda-0014610 | GJQL LFPP LMSV GDXA KLUQ WFUV GCRS LHLR TVNT TFMF YKKC YKVR SWGS LNWG LUUM YPHM PTGE XGQI KNZI YEGH EKIG HKWF KEQB VJWM BLWZ WRVQ TOMZ IQFT UCFE L | GJQL LFPP LMSV GDXA KLUQ WFUV GCRS LHLR TVNT TFMF YKKC YKVR SWGS LNWG LUUM YPHM PTGE XGQI KNZI YEGH EKIG HKWF KEQB VJWM BLWZ WRVQ TOMZ IQFT UCFE L | A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES THE ARCHITECTURE SHOULD MAKE MISUSE HARDER ATBASH ENCODES BY REVERSING THE ALPHABET | running_key | running_key | null | {} | hard | en | 117 | 117 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
cda-0018746 | 80 69 59 66 82 52 50 65 36 82 80 61 80 82 68 11 68 25 80 50 11 50 29 68 65 80 82 61 52 80 50 20 82 11 25 82 69 77 82 66 80 50 52 65 68 66 66 82 80 29 | 80 69 59 66 82 52 50 65 36 82 80 61 80 82 68 11 68 25 80 50 11 50 29 68 65 80 82 61 52 80 50 20 82 11 25 82 69 77 82 66 80 50 52 65 68 66 66 82 80 29 | ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN | wallis_cipher | wallis_cipher | null | {} | medium | en | 50 | 50 | synthetic_educational | null | null | [
"number_substitution_decode",
"frequency_analysis"
] | Wallis cipher: each letter mapped to a unique two-digit number from a fixed table. |
cda-0011684 | ALLF TBCS RHIX AFRT ISPE ECLC VEPT OHAE AYYQ XHIG EEIT ASEO OAUE YACM OASP RTNB NKKM INPD RNET UASN AKED ARCL RINE FRCA TEDO IIAG EAIN ASND ECIT STLW TSEN NSAR MITR NASE WISY | ALLF TBCS RHIX AFRT ISPE ECLC VEPT OHAE AYYQ XHIG EEIT ASEO OAUE YACM OASP RTNB NKKM INPD RNET UASN AKED ARCL RINE FRCA TEDO IIAG EAIN ASND ECIT STLW TSEN NSAR MITR NASE WISY | A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS TODAY | stager_route | stager_route | null | {
"cols": 5
} | hard | en | 140 | 140 | synthetic_educational | null | null | [] | |
m209-v2-0430 | WZQWKETZMERKWDNMETBPJTZULBJLXKWAYKAFNMUIBOVKQPFPOAQXNORWJNMPJMCAKOLVCLBC | WZQWKETZMERKWDNMETBPJTZULBJLXKWAYKAFNMUIBOVKQPFPOAQXNORWJNMPJMCAKOLVCLBC | GENERAL GRANT HAS TAKEN VICKSBURG THE GREAT RIVER IS NOW OPEN FROM ITS SOURCE TO THE SEA | m209 | m209 | machine | {
"type": "seed",
"value": "VICTORY"
} | expert | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
cda-0005389 | NMDI QJFV HHRO SQLY UNGZ BWLQ HXRY EACD VMAM VWRK MVKO VYYX ULQA RBRI GWII WROC FBVL PBHU IHVQ XXMH XSWP WHYI HZGT TNYF YZLR BBEB VEJQ YAJX USUT STKP ADPP MOYQ PMGU WACT QCNM HLCK TFWL FWLC EFYE FVWL FGMV GYMI RDJR VJQL OZMG FOHY OCOH YU | NMDI QJFV HHRO SQLY UNGZ BWLQ HXRY EACD VMAM VWRK MVKO VYYX ULQA RBRI GWII WROC FBVL PBHU IHVQ XXMH XSWP WHYI HZGT TNYF YZLR BBEB VEJQ YAJX USUT STKP ADPP MOYQ PMGU WACT QCNM HLCK TFWL FWLC EFYE FVWL FGMV GYMI RDJR VJQL OZMG FOHY OCOH YU | DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM | autokey | autokey | null | {
"primer": "KEY"
} | hard | en | 190 | 190 | synthetic_educational | null | null | [
"running_key_analysis",
"index_of_coincidence"
] | Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack. |
geez-monastic-v3-0002 | QMHUULAJMNCYQHBBHK | QMHUULAJMNCYQHBBHK | CROSS THE RUBICON NOW | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "ETHIOPIA"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
playfair-v2-0716 | HTKNLMENPIIPKS | HTKNLMENPIIPKS | PRESS THE ATTACK | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-135 | QESIBDXCJBYMAOU | QESIBDXCJBYMAOU | OPERATION BEGINS | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "SECRET"
} | expert | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
vic-v2-0268 | 878893929188481889138008849286 | 878893929188481889138008849286 | NOVUS ORDO SECLORUM | vic | vic | substitution | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 30 | 30 | cipher_museum | 2.0 | public | null | null |
morse-code-012 | -.-. .. .--. .... . .-. / -.- . -.-- / -.-. .... .- -. --. . -.. | -.-. .. .--. .... . .-. / -.- . -.-- / -.-. .... .- -. --. . -.. | CIPHER KEY CHANGED | morse_code | morse_code | encoding | {
"type": "none",
"value": null
} | beginner | en | 47 | 64 | cipher_museum | 0.2 | public | null | null |
tap-code-v3-0051 | . . .... .... .... .... .. ... . ..... . .. . . .... .... .... .... ... . . ..... ... .... .. . ... .. .. .... . .... ..... .. . . ..... .... . . ... .. . ..... .... .. .. .... . ... . . ... ... . .... .. .... ..... . . ..... . .. ... .... ... .. . .. ... | . . .... .... .... .... .. ... . ..... . .. . . .... .... .... .... ... . . ..... ... .... .. . ... .. .. .... . .... ..... .. . . ..... .... . . ... .. . ..... .... .. .. .... . ... . . ... ... . .... .. .... ..... . . ..... . .. ... .... ... .. . .. ... | AT THE BATTLE OF MIDWAY AMERICAN DIVE BOMBERS DESTROYED FOUR JAPANESE CARRIERS IN MINUTES | tap_code | tap_code | substitution | {
"type": "none",
"value": null
} | beginner | en | 431 | 732 | cipher_museum | 2.0 | public | null | null |
affine-v3-1073 | YCPWKK VEEVLK | YCPWKK VEEVLK | YANKEE DOODLE | affine | affine | substitution | {
"a": 15,
"b": 2
} | beginner | en | 12 | 13 | cipher_museum | 2.0 | public | null | null |
cda-0016973 | YTED YOKS HYYK CHEO LCHO ROKA INSH ARAL SHOR RAII NQOK EEDY OKAL CTAI INCH OLCT AIIN YPCH OLCH OLAI IINO TEDY OKSH YSHE DYOT OLQO TEDY YTAI INOT OLOT AINQ OKED YOTE DYSH ARAL OKSH YDAL SHED YOKE DYOR ORDA LOKE EDYS HAII NSHE OLCH EOLC HOLD AIIN QOKE DYOK EDYC HOLD AIIN CTAI INOT AINO TOLY TEDY DARA LYTA IINS HALO KSHY ... | YTED YOKS HYYK CHEO LCHO ROKA INSH ARAL SHOR RAII NQOK EEDY OKAL CTAI INCH OLCT AIIN YPCH OLCH OLAI IINO TEDY OKSH YSHE DYOT OLQO TEDY YTAI INOT OLOT AINQ OKED YOTE DYSH ARAL OKSH YDAL SHED YOKE DYOR ORDA LOKE EDYS HAII NSHE OLCH EOLC HOLD AIIN QOKE DYOK EDYC HOLD AIIN CTAI INOT AINO TOLY TEDY DARA LYTA IINS HALO KSHY ... | THE MESSAGE WAS HIDDEN BUT NOT SECURE THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH | voynich_render | voynich_render | null | {} | hard | en | 318 | 318 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
venona-pad-reuse-v2-0176 | NGPH436M3HK7QVDOGX6TJYAMCZBK7KGWHX4Y2PVA5OYPBXZB7LDKWRL6FGCJZV7Y3JP27W2ZPS | NGPH436M3HK7QVDOGX6TJYAMCZBK7KGWHX4Y2PVA5OYPBXZB7LDKWRL6FGCJZV7Y3JP27W2ZPS | GOOD NIGHT GOOD NIGHT PARTING IS SUCH SWEET SORROW THAT I SHALL SAY GOOD NIGHT TILL MORROW | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "LIBERTY"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
wallis-cipher-v3-0046 | 90 55 61 56 91 90 31 81 37 10 42 63 86 91 90 53 89 87 63 24 91 | 90 55 61 56 91 90 31 81 37 10 42 63 86 91 90 53 89 87 63 24 91 | THE FACTORY ROARS | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "OXFORD"
} | expert | en | 42 | 62 | cipher_museum | 2.0 | public | null | null |
cda-0014651 | BRZMXDPLCVXAHSRCBZYHYOHRRWDGSOAAWJWMOQHHQFJKSXPEKBLWRWEYMJBGKBQDPVUDAYTJPAOCTTXERCGHBOSCDUCNTXNCGBVUUJFMDFGGMLITNESFIKHGLGCTOURVXCDENLRCMBOSHQORBVAVVPFECKIGQ | BRZMXDPLCVXAHSRCBZYHYOHRRWDGSOAAWJWMOQHHQFJKSXPEKBLWRWEYMJBGKBQDPVUDAYTJPAOCTTXERCGHBOSCDUCNTXNCGBVUUJFMDFGGMLITNESFIKHGLGCTOURVXCDENLRCMBOSHQORBVAVVPFECKIGQ | THE MESSAGE WAS HIDDEN BUT NOT SECURE EVERY SYSTEM NEEDS AN HONEST THREAT MODEL THE BEST LESSONS SHOW WHERE THE METHOD FAILS THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT | vernam | vernam | null | {} | hard | en | 157 | 157 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
aeneas-tacticus-v2-0022 | 4 9 22 9 4 5 1 14 4 3 15 14 17 21 5 18 | 4 9 22 9 4 5 1 14 4 3 15 14 17 21 5 18 | DIVIDE AND CONQUER | aeneas_tacticus | aeneas_tacticus | steganography | {
"type": "none",
"value": null
} | expert | en | 23 | 38 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v3-0224 | WQIFMQZUVUFMSWPPZ | WQIFMQZUVUFMSWPPZ | ARCHERS TO THE WALLS | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "LALIBELA"
} | advanced | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-157 | JPPADMQCCGBQDVLKQDICSMWUGUAMSPBMDCTBNQBDRVMSUIRVL | JPPADMQCCGBQDVLKQDICSMWUGUAMSPBMDCTBNQBDRVMSUIRVL | GIVE ME LIBERTY OR GIVE ME DEATH SAID PATRICK HENRY | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 49 | 49 | cipher_museum | 0.2 | public | null | null |
diana-v2-0461 | SBXPALWHUWTJSUUPDWZPFHROEGYQFAQEERULVYLKPCDXQLDQUGEOBJAYFITRZAYAXWQNBYYFIXAPYSQ | SBXPALWHUWTJSUUPDWZPFHROEGYQFAQEERULVYLKPCDXQLDQUGEOBJAYFITRZAYAXWQNBYYFIXAPYSQ | THE PRICE OF LIBERTY IS ETERNAL VIGILANCE AND THE WILL TO DEFEND IT AGAINST ALL FOES AND THREATS | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
cda-0002066 | MMUCNMLWKQTRZHCKEUPBMHEUUYFHTFXNPJRDXZGJQPZQWLZEHIKMSITWGGDWZGKJZWYSPDLQVXAVHREBSG | MMUCNMLWKQTRZHCKEUPBMHEUUYFHTFXNPJRDXZGJQPZQWLZEHIKMSITWGGDWZGKJZWYSPDLQVXAVHREBSG | A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES THE BEST LESSONS SHOW WHERE THE METHOD FAILS | autokey | autokey | null | {
"primer": "MUSEUM"
} | hard | en | 82 | 82 | synthetic_educational | null | null | [
"running_key_analysis",
"index_of_coincidence"
] | Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack. |
alberti-disk-v3-0003 | PJIEZXOJKNWASJASPLPGGVW | PJIEZXOJKNWASJASPLPGGVW | ROME WAS NOT BUILT IN ONE DAY | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 4
} | expert | en | 23 | 23 | cipher_museum | 2.0 | public | null | null |
argenti-070 | 31 70 19 12 11 47 84 27 42 30 89 76 88 19 54 68 29 30 87 19 62 | 31 70 19 12 11 47 84 27 42 30 89 76 88 19 54 68 29 30 87 19 62 | THE PACKAGE IS DELIVERED | argenti | argenti | nomenclator | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 42 | 62 | cipher_museum | 0.2 | public | null | null |
nihilist-v3-0197 | 28 37 57 36 35 36 75 64 27 70 22 56 37 86 | 28 37 57 36 35 36 75 64 27 70 22 56 37 86 | MARCH TO VICTORY | nihilist | nihilist | fractionation | {
"polybius": "TRIUMPH",
"keyword": "JUSTICE"
} | advanced | en | 28 | 41 | cipher_museum | 2.0 | public | null | null |
cardano-autokey-v3-0111 | RMRTJAHJDKVHFP | RMRTJAHJDKVHFP | MARCH TO VICTORY | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "FLORENCE"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
cda-0016550 | 11 69 29 69 66 52 69 29 76 59 61 82 69 20 76 59 61 52 68 66 50 69 29 89 50 66 36 82 29 52 80 43 65 66 50 69 29 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 52 69 57 59 77 29 68 80 66 80 68 29 61 65 69 61 50 66 50 69 29 80 82 68 11 61 52 69 57... | 11 69 29 69 66 52 69 29 76 59 61 82 69 20 76 59 61 52 68 66 50 69 29 89 50 66 36 82 29 52 80 43 65 66 50 69 29 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 52 69 57 59 77 29 68 80 66 80 68 29 61 65 69 61 50 66 50 69 29 80 82 68 11 61 52 69 57... | DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | wallis_cipher | wallis_cipher | null | {} | hard | en | 121 | 121 | synthetic_educational | null | null | [
"number_substitution_decode",
"frequency_analysis"
] | Wallis cipher: each letter mapped to a unique two-digit number from a fixed table. |
geheimschreiber-v3-0408 | ITNXRQPHFSQBJONNBWUKORJPNZLUCDFAVOBJYOGVCMXEKLWRYVSIAXLPVXHUGIMHQSANZTAJRQTILEBMTMQVBWBPTSGLUUWDTUCXRMHOFHPRSREOAJBPPLHAKBIOXYATQAGTGVXTLEYKNLFDYNZQDUCJMGUHCJUQREBZG | ITNXRQPHFSQBJONNBWUKORJPNZLUCDFAVOBJYOGVCMXEKLWRYVSIAXLPVXHUGIMHQSANZTAJRQTILEBMTMQVBWBPTSGLUUWDTUCXRMHOFHPRSREOAJBPPLHAKBIOXYATQAGTGVXTLEYKNLFDYNZQDUCJMGUHCJUQREBZG | ULTRA INTELLIGENCE FROM BLETCHLEY PARK GAVE THE ALLIES AN ENORMOUS ADVANTAGE IN WORLD WAR TWO BY REVEALING GERMAN INTENTIONS BEFORE OPERATIONS BEGAN BUT THE SOURCE HAD TO BE PROTECTED AT ALL COSTS | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "TEUTON"
} | expert | en | 165 | 165 | cipher_museum | 2.0 | public | null | null |
cda-0015368 | 04746 0725 6017 1622 5684 6999 0340 0727 3797 1582 1614 06916 02882 1272 1587 04452 01020 1624 1017 4757 04161 1669 06007 00628 01626 01896 04806 05654 01660 01023 4809 04432 01952 02895 01323 01579 4473 0956 1654 0383 5990 6294 5714 4737 04419 2234 1020 3821 0329 02869 4150 4401 1616 01628 1320 05979 6006 06374 5679 0... | 04746 0725 6017 1622 5684 6999 0340 0727 3797 1582 1614 06916 02882 1272 1587 04452 01020 1624 1017 4757 04161 1669 06007 00628 01626 01896 04806 05654 01660 01023 4809 04432 01952 02895 01323 01579 4473 0956 1654 0383 5990 6294 5714 4737 04419 2234 1020 3821 0329 02869 4150 4401 1616 01628 1320 05979 6006 06374 5679 0... | OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE A STRONG CLAIM NEEDS STRONG EVIDENCE GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY | zimmermann | zimmermann | null | {} | hard | en | 114 | 114 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
vigenere-v2-0709 | GHNHUIZLDLVWXVGPHGKICTUAHDKVHMGNWLVFHNVFWRGKCGVGYTYUPWIILHLRWVZTUAYHWRGKWVUGCXZ | GHNHUIZLDLVWXVGPHGKICTUAHDKVHMGNWLVFHNVFWRGKCGVGYTYUPWIILHLRWVZTUAYHWRGKWVUGCXZ | NATURE IS WRITTEN IN THE LANGUAGE OF MATHEMATICS AND ITS CHARACTERS ARE TRIANGLES AND CIRCLES | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "THUNDER"
} | intermediate | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
bifid-v2-0645 | BQGXPBDEURGEIWPUFDYILRFFGOOLTQBGPUQIDWAIPREVHWEHAIFEBGFPHRECAFNKIPAIE | BQGXPBDEURGEIWPUFDYILRFFGOOLTQBGPUQIDWAIPREVHWEHAIFEBGFPHRECAFNKIPAIE | BLOOD SWEAT AND TEARS THESE ARE WHAT I OFFER YOU FOR THE DEFENSE OF OUR ISLAND NATION | bifid | bifid | fractionation | {
"type": "keyword",
"value": "TRIUMPH"
} | advanced | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
playfair-379 | FRAUALZGYEEVFSETZUQATHONAFMUULEMBRPOGTGQLMFPHUKHENKUFIQMSY | FRAUALZGYEEVFSETZUQATHONAFMUULEMBRPOGTGQLMFPHUKHENKUFIQMSY | ELEMENTARY MY DEAR WATSON THE GAME IS AFOOT AND THE CRIMINAL IS CLOSE | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | en | 58 | 58 | cipher_museum | 0.2 | public | null | null |
geez-monastic-v2-0058 | BJZJMYBLAJXYJVIHXANOPBQHBXVYQLKPUUHONQAHKJICRUHOPBRLHUHXJKCMPZJUHNVU | BJZJMYBLAJXYJVIHXANOPBQHBXVYQLKPUUHONQAHKJICRUHOPBRLHUHXJKCMPZJUHNVU | NEVER IN THE FIELD OF HUMAN CONFLICT WAS SO MUCH OWED BY SO MANY TO SO FEW BRAVE SOULS | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "ETHIOPIA"
} | advanced | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
lorenz-253 | THETBAPISSET | THETBAPISSET | THE TRAP IS SET | lorenz | lorenz | machine | {
"type": "seed",
"value": "ENIGMA"
} | expert | en | 12 | 12 | cipher_museum | 0.2 | public | null | null |
affine-v3-1472 | GHALUHE BQ BLU SGZZE | GHALUHE BQ BLU SGZZE | ARCHERS TO THE WALLS | affine | affine | substitution | {
"a": 23,
"b": 6
} | beginner | en | 17 | 20 | cipher_museum | 2.0 | public | null | null |
jn25-v2-0249 | 09996 09993 09999 09992 09905 09919 09999 09906 09908 09993 09906 09907 09994 09997 09906 09907 09908 09999 09906 09901 09913 09991 09903 09906 09904 09907 09903 09906 09992 09993 09906 09907 09994 09903 09906 09903 09991 09908 09903 09990 09993 09906 09994 09903 09919 09906 09908 09996 09902 09997 09902 09993 09908 09... | 09996 09993 09999 09992 09905 09919 09999 09906 09908 09993 09906 09907 09994 09997 09906 09907 09908 09999 09906 09901 09913 09991 09903 09906 09904 09907 09903 09906 09992 09993 09906 09907 09994 09903 09906 09903 09991 09908 09903 09990 09993 09906 09994 09903 09919 09906 09908 09996 09902 09997 09902 09993 09908 09... | HEADQUARTERS FIRST ARMY CORPS ORDERS FOR OCTOBER FOURTH NINETEEN EIGHTEEN THE CORPS WILL ATTACK AT ZERO HOUR WITH ALL AVAILABLE FORCES THE OBJECTIVE IS THE RIDGE OVERLOOKING THE ARGONNE FOREST | jn25 | jn25 | codebook | {
"type": "additive",
"value": "99999"
} | expert | en | 815 | 977 | cipher_museum | 2.0 | public | null | null |
straddling-checkerboard-v2-0355 | 4252212920133121502513022922873222157202953472024226421837014925223162117418438634072948563230529285621562571 | 4252212920133121502513022922873222157202953472024226421837014925223162117418438634072948563230529285621562571 | THE AMBASSADOR HAS RECEIVED OUR MOST URGENT DISPATCHES AND AWAITS INSTRUCTIONS FROM LONDON HQ | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "RASTONICEL"
} | advanced | en | 109 | 109 | cipher_museum | 2.0 | public | null | null |
m209-v2-0440 | JWZPNNBXLSGLWZQYAMCUMUBTSPPJHDQLXXSFWZJWTBSUZANHQWQWNYZRNFMKJMAMCEMJYSUGBKZMM | JWZPNNBXLSGLWZQYAMCUMUBTSPPJHDQLXXSFWZJWTBSUZANHQWQWNYZRNFMKJMAMCEMJYSUGBKZMM | THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME LIE DOWN IN GREEN PASTURES BY STILL WATERS | m209 | m209 | machine | {
"type": "seed",
"value": "VICTORY"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
vigenere-516 | VTRXUINSMTJWNWKEBMGRQECPOPKQRRRRYEUQRRDIMMRCCPRCZZY | VTRXUINSMTJWNWKEBMGRQECPOPKQRRRRYEUQRRDIMMRCCPRCZZY | ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "VIGENERE"
} | intermediate | en | 51 | 51 | cipher_museum | 0.2 | public | null | null |
gronsfeld-v3-0312 | AOLCLUVUHWYVQLJADOPJOYHUMYVTUPULALLUMVYAFAOYLLAVUPULALLULPNOAFKLJYFWALKAOVBZHUKZVMZVCPLAPUALSSPNLUJLTLZZHNLZYLCLHSPUNAOLPKLUAPAPLZVMUBTLYVBZHNLUAZDOVOHKWLULAYHALKAOLBZNVCLYUTLUA | AOLCLUVUHWYVQLJADOPJOYHUMYVTUPULALLUMVYAFAOYLLAVUPULALLULPNOAFKLJYFWALKAOVBZHUKZVMZVCPLAPUALSSPNLUJLTLZZHNLZYLCLHSPUNAOLPKLUAPAPLZVMUBTLYVBZHNLUAZDOVOHKWLULAYHALKAOLBZNVCLYUTLUA | THE VENONA PROJECT WHICH RAN FROM NINETEEN FORTY THREE TO NINETEEN EIGHTY DECRYPTED THOUSANDS OF SOVIET INTELLIGENCE MESSAGES REVEALING THE IDENTITIES OF NUMEROUS AGENTS WHO HAD PENETRATED THE US GOVERNMENT | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "77777"
} | intermediate | en | 177 | 177 | cipher_museum | 2.0 | public | null | null |
bazeries-v3-0236 | OFGRYLNSCCNOMPGXVOYYNVUYMYO | OFGRYLNSCCNOMPGXVOYYNVUYMYO | DONT FIRE TILL YOU SEE THE WHITES | bazeries | bazeries | transposition | {
"type": "integer",
"value": 37
} | advanced | en | 27 | 27 | cipher_museum | 2.0 | public | null | null |
adfgvx-v3-0221 | XAFAGDDAGDFVDFAGAXAGFFAXDDDFGVAGXAADADVGDD | XAFAGDDAGDFVDFAGAXAGFFAXDDDFGVAGXAADADVGDD | THE CASTLE IS SURROUNDED | adfgvx | adfgvx | fractionation | {
"polybius": "TRIUMPH",
"columnar": "JUSTICE"
} | advanced | en | 42 | 42 | cipher_museum | 2.0 | public | null | null |
cda-0011990 | AABB BABA AAAB ABAA BABA AAAB AABA AAAB BBAA ABBB AABA ABAA AABA ABBB AAAB AABA ABAA ABAB ABAA BAAA ABBA AAAB AAAA AAAB AAAA AAAA AABA BAAA BBAA ABAA AAAA BBAA AAAA AAAB AABA ABBA BAAB AAAB BAAA AABA BAAA ABAB BAAB BBAB AABA AAAA BABA BAAB BABA AABA ABAA BBAA ABAB BABA ABAB ABAB AAAB AABA ABAB AABA AABA ABAA AABA AABA ... | AABB BABA AAAB ABAA BABA AAAB AABA AAAB BBAA ABBB AABA ABAA AABA ABBB AAAB AABA ABAA ABAB ABAA BAAA ABBA AAAB AAAA AAAB AAAA AAAA AABA BAAA BBAA ABAA AAAA BBAA AAAA AAAB AABA ABBA BAAB AAAB BAAA AABA BAAA ABAB BAAB BBAB AABA AAAA BABA BAAB BABA AABA ABAA BBAA ABAB BABA ABAB ABAB AAAB AABA ABAB AABA AABA ABAA AABA AABA ... | HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS NEVER | bacon_cipher | bacon_cipher | null | {} | hard | en | 980 | 980 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
bifid-v2-0612 | BQRBXBNEEGDAT | BQRBXBNEEGDAT | HONOR ABOVE ALL | bifid | bifid | fractionation | {
"type": "keyword",
"value": "TRIUMPH"
} | advanced | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
bazeries-341 | OFJEPKBUPFKWNQKTJQNPTWJFKYKXWNQKQIUPFBWPQKFTYJK | OFJEPKBUPFKWNQKTJQNPTWJFKYKXWNQKQIUPFBWPQKFTYJK | ASK NOT WHAT YOUR COUNTRY CAN DO FOR YOU BUT WHAT YOU CAN DO | bazeries | bazeries | transposition | {
"type": "integer",
"value": 56
} | advanced | en | 47 | 47 | cipher_museum | 0.2 | public | null | null |
nomenclator-v3-0173 | 04 01 18 23 09 14 15 02 19 05 18 22 05 04 20 08 01 20 19 16 05 03 09 05 19 05 22 15 12 22 05 20 08 18 15 21 07 08 14 01 20 21 18 01 12 19 05 12 05 03 20 09 15 14 15 22 05 18 22 01 19 20 19 16 01 14 19 62 07 05 15 12 15 07 09 03 20 09 13 05 | 04 01 18 23 09 14 15 02 19 05 18 22 05 04 20 08 01 20 19 16 05 03 09 05 19 05 22 15 12 22 05 20 08 18 15 21 07 08 14 01 20 21 18 01 12 19 05 12 05 03 20 09 15 14 15 22 05 18 22 01 19 20 19 16 01 14 19 62 07 05 15 12 15 07 09 03 20 09 13 05 | DARWIN OBSERVED THAT SPECIES EVOLVE THROUGH NATURAL SELECTION OVER VAST SPANS OF GEOLOGIC TIME | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "PALACE"
} | expert | en | 160 | 239 | cipher_museum | 2.0 | public | null | null |
affine-v3-0319 | KCJML TU DQMTUJS | KCJML TU DQMTUJS | MARCH TO VICTORY | affine | affine | substitution | {
"a": 5,
"b": 2
} | beginner | en | 14 | 16 | cipher_museum | 2.0 | public | null | null |
playfair-300 | BSZOYTNTFHOVSQHIXI | BSZOYTNTFHOVSQHIXI | CRYPTOGRAPHY RULES | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "ENIGMA"
} | intermediate | en | 18 | 18 | cipher_museum | 0.2 | public | null | null |
cda-0014729 | .. .. ... .... ... .... . .... . ..... . .... .... ..... . ... . . .... .... .. .... ... .... ... ... . . ... . .... .... ... .... ... .... ... . .... ... . ..... ..... ... ... ..... ... . . . .. .... ... ... .... .... .. ... . ..... .. .... .... .. ... . .. .... ... .. .. .... .... ... | .. .. ... .... ... .... . .... . ..... . .... .... ..... . ... . . .... .... .. .... ... .... ... ... . . ... . .... .... ... .... ... .... ... . .... ... . ..... ..... ... ... ..... ... . . . .. .... ... ... .... .... .. ... . ..... .. .... .... .. ... . .. .... ... .. .. .... .... ... | GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION | tap_code | tap_code | null | {} | hard | en | 169 | 169 | 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. |
bazeries-v2-0578 | KKLTHOQOHQBLJHKHHAQBPLMXYKFKLBQOLMHOHIDTFIBKHOLRGFRQAEFAQBVGQPGGSRAQEKHOQKSLT | KKLTHOQOHQBLJHKHHAQBPLMXYKFKLBQOLMHOHIDTFIBKHOLRGFRQAEFAQBVGQPGGSRAQEKHOQKSLT | RECONNOITER THE ENEMY POSITION AND REPORT BACK BEFORE NIGHTFALL WITH A FULL STRENGTH COUNT | bazeries | bazeries | transposition | {
"type": "integer",
"value": 53
} | advanced | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
lorenz-v3-0103 | ROMEWASNOTBUILTINONEDAY | ROMEWASNOTBUILTINONEDAY | ROME WAS NOT BUILT IN ONE DAY | lorenz | lorenz | machine | {
"type": "seed",
"value": "FISH"
} | expert | en | 23 | 23 | cipher_museum | 2.0 | public | null | null |
hill-v2-0254 | OIUHXCCSOSBLTYHGBLFIYMMX | OIUHXCCSOSBLTYHGBLFIYMMX | CARTHAGE MUST BE DESTROYED | hill | hill | polygraphic | {
"a": 7,
"b": 3,
"c": 4,
"d": 5
} | advanced | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v3-0590 | PISOQNWWUNWBLJMRAAKQNAJUUNIAZMNPLGANVZGSMKVTKRZTKICPHZYQMLGWCPVXGRBZZMNABT | PISOQNWWUNWBLJMRAAKQNAJUUNIAZMNPLGANVZGSMKVTKRZTKICPHZYQMLGWCPVXGRBZZMNABT | GALILEO POINTED HIS TELESCOPE AT THE HEAVENS AND CONFIRMED THAT THE EARTH ORBITS THE SUN | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "98765"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
enigma-v3-0218 | USZOJUJWMVWSNGEH | USZOJUJWMVWSNGEH | PER ASPERA AD ASTRA | enigma | enigma | machine | {
"type": "rotor_start",
"value": "GHI"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0008211 | QSVB WDUS LBTV SXZL SRMB LWFX JQXL JRQL SXNY HWTF JGFJ UWTX FJRX KDNQ DFJQ FRXJ QXFM LYMX NYHQ HYXW TXLS QTFW XQWY SXMT DYHR OLGX OFMY MXTL SRXS UDDR XRYQ LWFD JLHW DDHM XKBH LFJW TXFS HFOF WMWD ODSS DZ | QSVB WDUS LBTV SXZL SRMB LWFX JQXL JRQL SXNY HWTF JGFJ UWTX FJRX KDNQ DFJQ FRXJ QXFM LYMX NYHQ HYXW TXLS QTFW XQWY SXMT DYHR OLGX OFMY MXTL SRXS UDDR XRYQ LWFD JLHW DDHM XKBH LFJW TXFS HFOF WMWD ODSS DZ | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING THE INDEX OF COINCIDENCE IS A USEFUL CLUE THE ARCHITECTURE SHOULD MAKE MISUSE HARDER GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS TOMORROW | monoalphabetic | monoalphabetic | null | {
"alphabet": "LEQRXNUTFAGHOJDBPSMWYCZKVI"
} | hard | en | 162 | 162 | synthetic_educational | null | null | [] | |
slidex-012 | XHPCBHZGTNDRBUYL | XHPCBHZGTNDRBUYL | CIPHER KEY CHANGED | slidex | slidex | transposition | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
bazeries-v3-0661 | TAPFTPVMTTJIRTLFSTM | TAPFTPVMTTJIRTLFSTM | THE TELESCOPE REVEALS | bazeries | bazeries | transposition | {
"type": "integer",
"value": 71
} | advanced | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
kryha-v2-0255 | XNEZTVSKJNK | XNEZTVSKJNK | HOLD THE LINE | kryha | kryha | machine | {
"type": "keyword",
"value": "PRAGUE"
} | expert | en | 11 | 11 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0416 | CNAFGKDFLMEAIATPBPMQCRAATRTPXRCNCPQQALEOFUMUSBMHCKDZRSYQTRDFAFGQTROOHTTBKK | CNAFGKDFLMEAIATPBPMQCRAATRTPXRCNCPQQALEOFUMUSBMHCKDZRSYQTRDFAFGQTROOHTTBKK | I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION | four_square | four_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
autokey-293 | PRBPGSEMVNVWWWPIULRITLMOSBKHOLRZJAGPNFITSPSGDKZKGWAICLCUEMOW | PRBPGSEMVNVWWWPIULRITLMOSBKHOLRZJAGPNFITSPSGDKZKGWAICLCUEMOW | LET JUSTICE BE DONE THOUGH THE HEAVENS FALL AND THE STARS GO DARK FOREVER | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "ENIGMA"
} | intermediate | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
monoalphabetic-v2-0480 | GBHDOQÉ ÉRTGBQÉ EOTQDOJBQÉ KS GT IKOQ UDP IKQP NÉEBJBPPDJQ GT ODVKGSQBKJ EOTJÇTBPD ND IBG PDLQ | GBHDOQÉ ÉRTGBQÉ EOTQDOJBQÉ KS GT IKOQ UDP IKQP NÉEBJBPPDJQ GT ODVKGSQBKJ EOTJÇTBPD ND IBG PDLQ | LIBERTÉ ÉGALITÉ FRATERNITÉ OU LA MORT CES MOTS DÉFINISSENT LA REVOLUTION FRANÇAISE DE MIL SEPT | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "THUNDER"
} | beginner | en | 80 | 94 | cipher_museum | 2.0 | public | null | null |
chaocipher-v3-0246 | SLQNSGGFNRYSHHVRYQU | SLQNSGGFNRYSHHVRYQU | MEASURE TWICE CUT ONCE | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
culper-ring-v2-0064 | 998 819 817 820 818 819 999 104 100 998 811 814 817 803 999 110 127 998 819 807 808 813 804 999 998 807 804 800 817 819 999 102 998 811 804 800 813 999 118 998 820 813 819 814 999 998 819 807 808 813 804 999 998 814 822 813 999 998 820 813 803 804 817 818 819 800 813 803 808 813 806 999 104 127 998 822 800 824 818 999 | 998 819 817 820 818 819 999 104 100 998 811 814 817 803 999 110 127 998 819 807 808 813 804 999 998 807 804 800 817 819 999 102 998 811 804 800 813 999 118 998 820 813 819 814 999 998 819 807 808 813 804 999 998 814 822 813 999 998 820 813 803 804 817 818 819 800 813 803 808 813 806 999 104 127 998 822 800 824 818 999 | TRUST IN THE LORD WITH ALL THINE HEART AND LEAN NOT UNTO THINE OWN UNDERSTANDING IN ALL WAYS | culper_ring | culper_ring | codebook | {
"type": "none",
"value": null
} | expert | en | 240 | 319 | cipher_museum | 2.0 | public | null | null |
adfgx-v3-0127 | ADDXDGAFFAXGFAFGGAAAXDXFXXAGXGAADDFDGDFGXXAAFFDAFD | ADDXDGAFFAXGFAFGGAAAXDXFXXAGXGAADDFDGDFGXXAAFFDAFD | THE SHOT HEARD ROUND THE WORLD | adfgx | adfgx | fractionation | {
"polybius": "LIBERTY",
"columnar": "FREEDOM"
} | advanced | en | 50 | 50 | cipher_museum | 2.0 | public | null | null |
enigma-v3-0267 | RFOZWRHWLXVRSPWYBRTUVJCJCSKEVGJOZLHQDMXIHRBNNKNRJGCPAFWPFPJBVTGXTIFVVSVKFT | RFOZWRHWLXVRSPWYBRTUVJCJCSKEVGJOZLHQDMXIHRBNNKNRJGCPAFWPFPJBVTGXTIFVVSVKFT | THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN | enigma | enigma | machine | {
"type": "rotor_start",
"value": "GHI"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
alberti-disk-v2-0342 | KENDNYTTOMSBTNCYEGCTRKRTRJRHKEQDOKWJNDMPVYLUGOFUIMUMMNOVNANOPICUFMITDYFWSSCJ | KENDNYTTOMSBTNCYEGCTRKRTRJRHKEQDOKWJNDMPVYLUGOFUIMUMMNOVNANOPICUFMITDYFWSSCJ | MARY QUEEN OF SCOTS WAS BEHEADED AFTER HER CIPHER LETTERS WERE DECODED BY THOMAS PHELIPPES | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 8
} | expert | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
nihilist-101 | 59 86 88 36 88 45 75 66 58 37 80 58 77 60 94 30 80 88 49 67 64 58 67 65 75 86 88 36 70 56 78 59 58 36 88 57 55 86 88 46 59 78 59 86 64 59 59 78 48 57 86 50 67 78 46 86 78 | 59 86 88 36 88 45 75 66 58 37 80 58 77 60 94 30 80 88 49 67 64 58 67 65 75 86 88 36 70 56 78 59 58 36 88 57 55 86 88 46 59 78 59 86 64 59 59 78 48 57 86 50 67 78 46 86 78 | FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION | nihilist | nihilist | fractionation | {
"polybius": "CIPHER",
"keyword": "MUSEUM"
} | advanced | en | 114 | 170 | cipher_museum | 0.2 | public | null | null |
geheimschreiber-v3-0374 | VUIMRTOKFCAOLIQQILUFQVRABULQTYERMBEQYOAYLXIPFSQXNNYDEWVRYAABMHCSISPNDTAGS | VUIMRTOKFCAOLIQQILUFQVRABULQTYERMBEQYOAYLXIPFSQXNNYDEWVRYAABMHCSISPNDTAGS | THE BATTLE OF BRITAIN RAGED IN THE SKIES ABOVE ENGLAND FOR FOUR MONTHS IN NINETEEN FORTY | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "TEUTON"
} | expert | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
red-type-a-v2-0123 | NIOMTUUWPIJKMENHWOJNEJIFGJALLIGHBALENPYZALMAENWLBEVIXUAJIYFGJUITLNULILHTHEJNOFWIKGOSFUFIRAEKXERCOFHOHOEPOVVUMEKHUHWQAAQTIPTEMIIRRCAZEMMIASIFVYIVEXRWLIIJFEQJUVIKIRR | NIOMTUUWPIJKMENHWOJNEJIFGJALLIGHBALENPYZALMAENWLBEVIXUAJIYFGJUITLNULILHTHEJNOFWIKGOSFUFIRAEKXERCOFHOHOEPOVVUMEKHUHWQAAQTIPTEMIIRRCAZEMMIASIFVYIVEXRWLIIJFEQJUVIKIRR | HEADQUARTERS FIRST ARMY CORPS ORDERS FOR OCTOBER FOURTH NINETEEN EIGHTEEN THE CORPS WILL ATTACK AT ZERO HOUR WITH ALL AVAILABLE FORCES THE OBJECTIVE IS THE RIDGE OVERLOOKING THE ARGONNE FOREST | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "SAKURA"
} | advanced | en | 163 | 163 | cipher_museum | 2.0 | public | null | null |
autokey-v3-0268 | NPBVXXMHAHVRMUMMIVTOGKXJEBUTKIDNEZXFSADPLXFFTGITALJWALNUHJMAILNYVGDWRLDITS | NPBVXXMHAHVRMUMMIVTOGKXJEBUTKIDNEZXFSADPLXFFTGITALJWALNUHJMAILNYVGDWRLDITS | CHARGE OF THE LIGHT BRIGADE INTO THE VALLEY OF DEATH RODE THE SIX HUNDRED BRAVE CAVALIERS | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0020244 | 5 14 20 18 15 16 25 13 5 1 19 21 18 5 19 21 14 3 5 18 20 1 9 14 20 25 9 14 1 4 9 19 20 18 9 2 21 20 9 15 14 20 8 5 4 5 20 5 3 20 9 22 5 19 20 21 4 9 5 19 16 1 20 20 5 18 14 19 2 5 6 15 18 5 13 1 11 9 14 7 3 12 1 9 13 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 1... | 5 14 20 18 15 16 25 13 5 1 19 21 18 5 19 21 14 3 5 18 20 1 9 14 20 25 9 14 1 4 9 19 20 18 9 2 21 20 9 15 14 20 8 5 4 5 20 5 3 20 9 22 5 19 20 21 4 9 5 19 16 1 20 20 5 18 14 19 2 5 6 15 18 5 13 1 11 9 14 7 3 12 1 9 13 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 1... | ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT THE MESSAGE WAS HIDDEN BUT NOT SECURE HONESTLY | aeneas_tacticus | aeneas_tacticus | null | {} | hard | en | 179 | 179 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
straddling-checkerboard-v2-0155 | 709612342123208142557312163876 | 709612342123208142557312163876 | PATIENCE BRINGS VICTORY | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "LIONSTRACE"
} | advanced | en | 30 | 30 | cipher_museum | 2.0 | public | null | null |
cda-0003453 | CBYLOVHF RAPBQRQ YRGGREF NF CNVEF BS AHZOREF SEBZ BAR GB SVIR PNRFNE FUVSGRQ GUR NYCUNORG OL GUERR CBFVGVBAF | CBYLOVHF RAPBQRQ YRGGREF NF CNVEF BS AHZOREF SEBZ BAR GB SVIR PNRFNE FUVSGRQ GUR NYCUNORG OL GUERR CBFVGVBAF | POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 91 | 91 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
bazeries-v2-0754 | ASLODPADDYOGTYXGYVTYQALYYTFHLEYOJWLXSFLYVTFVAGYGEESLOSATGAXAOMYOSXYGYOSNZGSJWFAQATLYSMGHAMXGHXYLOSLOGYSXOSTYHXMASDAFLAEGTYNOVGAOJYXYLYJHGHEGHAOSPOAOLHMMSNYTTYYXXPTY | ASLODPADDYOGTYXGYVTYQALYYTFHLEYOJWLXSFLYVTFVAGYGEESLOSATGAXAOMYOSXYGYOSNZGSJWFAQATLYSMGHAMXGHXYLOSLOGYSXOSTYHXMASDAFLAEGTYNOVGAOJYXYLYJHGHEGHAOSPOAOLHMMSNYTTYYXXPTY | ULTRA INTELLIGENCE DERIVED FROM DECRYPTED GERMAN ENIGMA TRAFFIC INDICATES THAT ENEMY PANZER DIVISIONS ARE CONCENTRATED AT CALAIS CONFIRMING THE DECEPTION OPERATION FORTITUDE HAS SUCCEEDED | bazeries | bazeries | transposition | {
"type": "integer",
"value": 67
} | advanced | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
cda-0021806 | 3.1.8 11.6.6 19.4.4 3.6.8 20.3.2 18.1.7 17.4.2 9.3.8 9.6.6 12.6.1 11.6.3 14.6.6 8.6.6 4.6.9 18.6.8 11.4.10 10.1.3 7.1.10 18.3.5 11.6.10 4.2.4 18.6.10 5.6.10 9.4.6 13.4.3 13.3.4 13.2.8 11.5.2 13.3.7 20.3.6 9.3.7 4.1.2 20.2.1 4.2.6 19.4.9 18.1.7 16.5.4 9.2.8 20.2.4 15.2.7 4.5.1 6.3.7 18.4.7 18.3.10 5.1.2 1.2.5 20.4.6 7.3... | 3.1.8 11.6.6 19.4.4 3.6.8 20.3.2 18.1.7 17.4.2 9.3.8 9.6.6 12.6.1 11.6.3 14.6.6 8.6.6 4.6.9 18.6.8 11.4.10 10.1.3 7.1.10 18.3.5 11.6.10 4.2.4 18.6.10 5.6.10 9.4.6 13.4.3 13.3.4 13.2.8 11.5.2 13.3.7 20.3.6 9.3.7 4.1.2 20.2.1 4.2.6 19.4.9 18.1.7 16.5.4 9.2.8 20.2.4 15.2.7 4.5.1 6.3.7 18.4.7 18.3.10 5.1.2 1.2.5 20.4.6 7.3... | KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | arnold_andre | arnold_andre | null | {} | hard | en | 201 | 201 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Arnold-André book cipher: coordinates (page.section.word) referencing a shared text. |
enigma-v3-0588 | HFQDTZJSNIEMJCWGAFSLVOENFSYHXYAUTQRXTJVHVUHQTZNADZSJFQDPJEMOYOWUJWYHMSHGLHI | HFQDTZJSNIEMJCWGAFSLVOENFSYHXYAUTQRXTJVHVUHQTZNADZSJFQDPJEMOYOWUJWYHMSHGLHI | THE SPEED OF LIGHT IS THE ULTIMATE SPEED LIMIT IN THE UNIVERSE EINSTEIN DEMONSTRATED THIS | enigma | enigma | machine | {
"type": "rotor_start",
"value": "PQR"
} | expert | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
cda-0009780 | TOEAAANTEEUNIOORLTALNXTSCLITNHESHLCHEEOCCRIUDEMOTLEFRCWISESBEHMCPHUSCIURNNRXSRAESOTRYHLEOSTWTAEMIHIACNEIXXNASOUNETORSHWLEHOSSDYICSLPDKXXESOUEINMETIDESSRFCERADDFMSCYX | TOEAAANTEEUNIOORLTALNXTSCLITNHESHLCHEEOCCRIUDEMOTLEFRCWISESBEHMCPHUSCIURNNRXSRAESOTRYHLEOSTWTAEMIHIACNEIXXNASOUNETORSHWLEHOSSDYICSLPDKXXESOUEINMETIDESSRFCERADDFMSCYX | THE BEST LESSONS SHOW WHERE THE METHOD FAILS CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS THE INDEX OF COINCIDENCE IS A USEFUL CLUE COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | stager_route | stager_route | null | {
"cols": 11
} | hard | en | 165 | 165 | synthetic_educational | null | null | [] | |
null-cipher-v3-0080 | to call said outi number into man its raei and come its which into tell sound this | to call said outi number into man its raei and come its which into tell sound this | OLD IRONSIDES HOLDS | null_cipher | null_cipher | steganography | {
"type": "position",
"value": "last"
} | advanced | en | 66 | 82 | cipher_museum | 2.0 | public | null | null |
cda-0015987 | EEHXR SOBRR JOISZ KZNXF FFLSR GTCTT YHRYH DMECL AYFII XWWMA HMZYT TOVPJ ZSTOA TKIEG LSHIF FVJFS XAYEZ BWZWU QGTPY ENFVO TRDUR TMSKR WACTO CJRKP KNDNG ERYSS BUDLR UGFHL YNYWN WHXEN IJUWH CZUMK IFQXW EKQYC RBXWY RSCOX MBXUI NKIVQ B | EEHXR SOBRR JOISZ KZNXF FFLSR GTCTT YHRYH DMECL AYFII XWWMA HMZYT TOVPJ ZSTOA TKIEG LSHIF FVJFS XAYEZ BWZWU QGTPY ENFVO TRDUR TMSKR WACTO CJRKP KNDNG ERYSS BUDLR UGFHL YNYWN WHXEN IJUWH CZUMK IFQXW EKQYC RBXWY RSCOX MBXUI NKIVQ B | DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE | 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. |
red-type-a-v2-0407 | CAXYONTYKZAKLXTADTIXA | CAXYONTYKZAKLXTADTIXA | PATIENCE BRINGS VICTORY | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "MIKADO"
} | advanced | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
cda-0018306 | 6.3.8 14.5.7 8.1.7 9.2.4 8.3.9 9.2.1 5.4.9 9.2.8 5.1.6 1.4.6 9.4.1 16.5.6 3.3.9 2.2.3 20.2.7 9.5.5 20.6.7 14.5.4 17.5.6 17.4.10 14.6.9 14.5.1 17.5.1 4.1.2 9.5.6 3.5.4 20.1.9 3.4.8 13.5.5 5.6.8 9.3.10 16.6.5 16.2.6 14.2.7 14.2.7 8.3.8 3.4.1 18.4.3 11.5.10 16.3.7 12.2.4 1.2.7 2.5.4 20.6.3 11.2.3 20.1.4 9.1.6 11.1.5 10.6.... | 6.3.8 14.5.7 8.1.7 9.2.4 8.3.9 9.2.1 5.4.9 9.2.8 5.1.6 1.4.6 9.4.1 16.5.6 3.3.9 2.2.3 20.2.7 9.5.5 20.6.7 14.5.4 17.5.6 17.4.10 14.6.9 14.5.1 17.5.1 4.1.2 9.5.6 3.5.4 20.1.9 3.4.8 13.5.5 5.6.8 9.3.10 16.6.5 16.2.6 14.2.7 14.2.7 8.3.8 3.4.1 18.4.3 11.5.10 16.3.7 12.2.4 1.2.7 2.5.4 20.6.3 11.2.3 20.1.4 9.1.6 11.1.5 10.6.... | THE MESSAGE WAS HIDDEN BUT NOT SECURE INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | arnold_andre | arnold_andre | null | {} | hard | en | 127 | 127 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Arnold-André book cipher: coordinates (page.section.word) referencing a shared text. |
four-square-v2-0532 | PSQTRDKQEUKHROYEQDWHKNCBLUEUINNRKULCSHKKTSKQKSCBLUGYLQKUITRQSHDDGBBLWHGVDVQX | PSQTRDKQEUKHROYEQDWHKNCBLUEUINNRKULCSHKKTSKQKSCBLUGYLQKUITRQSHDDGBBLWHGVDVQX | TRUST IN THE LORD WITH ALL THINE HEART AND LEAN NOT UNTO THINE OWN UNDERSTANDING IN ALL WAYS | four_square | four_square | polygraphic | {
"key1": "WISDOM",
"key2": "COURAGE"
} | advanced | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
pigpen-v2-0021 | ┴• ┼• ┤• ╳• ╳ ┬ ▽ ╲ ┼ ¬• ┤ | ┴• ┼• ┤• ╳• ╳ ┬ ▽ ╲ ┼ ¬• ┤ | KNOW THYSELF | pigpen | pigpen | substitution | {
"type": "none",
"value": null
} | beginner | en | 16 | 26 | cipher_museum | 2.0 | public | null | null |
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