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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
voynich-render-v2-0054 | oqlu is gcd nigiloy yqixxdx gcd qonnocorriyp girkhcg oaxifzgd xkfdryd kx klndqogkvd rij | oqlu is gcd nigiloy yqixxdx gcd qonnocorriyp girkhcg oaxifzgd xkfdryd kx klndqogkvd rij | ARMY OF THE POTOMAC CROSSES THE RAPPAHANNOCK TONIGHT ABSOLUTE SILENCE IS IMPERATIVE NOW | voynich_render | voynich_render | substitution | {
"type": "none",
"value": null
} | expert | en | 75 | 87 | cipher_museum | 2.0 | public | null | null |
cda-0019212 | 6368 05696 0318 4449 06014 5034 04802 06029 02920 06356 02906 4773 4415 00960 2900 05088 02573 1655 05663 6030 5670 01595 00348 5746 5731 00347 4465 02203 01572 03814 1589 06303 06323 1576 05663 06027 07306 2890 6363 2529 04792 6643 6354 06051 06670 00711 06057 06363 2924 06366 06677 6345 2845 04742 4446 01003 4719 037... | 6368 05696 0318 4449 06014 5034 04802 06029 02920 06356 02906 4773 4415 00960 2900 05088 02573 1655 05663 6030 5670 01595 00348 5746 5731 00347 4465 02203 01572 03814 1589 06303 06323 1576 05663 06027 07306 2890 6363 2529 04792 6643 6354 06051 06670 00711 06057 06363 2924 06366 06677 6345 2845 04742 4446 01003 4719 037... | TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | zimmermann | zimmermann | null | {} | hard | en | 98 | 98 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
vigenere-v3-1180 | BRLJZOYPLGGATBJVLW | BRLJZOYPLGGATBJVLW | GRAVITY EXPLAINS ALL | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "VALOR"
} | intermediate | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
null-cipher-v2-0019 | call on new this any came their him after sound by each each now most and day each | call on new this any came their him after sound by each each now most and day each | CONTACT HAS BEEN MADE | null_cipher | null_cipher | steganography | {
"type": "position",
"value": "first"
} | advanced | en | 65 | 82 | cipher_museum | 2.0 | public | null | null |
cda-0010049 | RAGE BCLZ RNFH ERFH APRE GNVA GLVA NQVF GEVO HGVB AGUR QRGR PGVI RFGH QVRF CNGG REAF ORSB ERZN XVAT PYNV ZFNZ BQRY PNAP YNFF VSLC NGGR EAFO HGVG PNAN YFBO RJEB ATQB ABGP BASH FRBO SHFP NGVB AJVG URAP ELCG VBA | RAGE BCLZ RNFH ERFH APRE GNVA GLVA NQVF GEVO HGVB AGUR QRGR PGVI RFGH QVRF CNGG REAF ORSB ERZN XVAT PYNV ZFNZ BQRY PNAP YNFF VSLC NGGR EAFO HGVG PNAN YFBO RJEB ATQB ABGP BASH FRBO SHFP NGVB AJVG URAP ELCG VBA | ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 167 | 167 | synthetic_educational | null | null | [] | |
m94-v2-0241 | XOQXSXVUEEXEIRDTFHNKW | XOQXSXVUEEXEIRDTFHNKW | PATIENCE BRINGS VICTORY | m94 | m94 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
adfgx-v2-0514 | DFGXGDDXAFXFDAAXAXAXGDFAFGDFDXGAXFFFGGDDXAGDXAGAXDXAXAXDAAGXDXFXXGDDAGFFDAAADFFFDDDDGGDADXAXFADDDAAFGDAFAAXDDDFDDADFADGXGXGXFADA | DFGXGDDXAFXFDAAXAXAXGDFAFGDFDXGAXFFFGGDDXAGDXAGAXDXAXAXDAAGXDXFXXGDDAGFFDAAADFFFDDDDGGDADXAXFADDDAAFGDAFAAXDDDFDDADFADGXGXGXFADA | WHAT IS IN A NAME THAT WHICH WE CALL A ROSE BY ANY OTHER NAME WOULD SMELL AS SWEET | adfgx | adfgx | fractionation | {
"polybius": "WISDOM",
"columnar": "COURAGE"
} | advanced | en | 128 | 128 | cipher_museum | 2.0 | public | null | null |
cda-0002307 | MKA LMGTYNSWJW KXCXAM OJKRRCZW TYN ETOHMENL DF AZB CQMVVERE AEBH BBYLAM HEUG CWOHIO XMAL DESNEN DDGBQNE KA ISPNGOV LUDCUL AH UNLLZXU MKA UDWENHW AGOAXEELVAZ AJRBL XIQNELZL TOJYNDCU XE CWOHIOYAHK ZMMYANQ SYOOM XZDX EAAET CYSDETOHMENLWB WSEZLWKUTXDR | MKA LMGTYNSWJW KXCXAM OJKRRCZW TYN ETOHMENL DF AZB CQMVVERE AEBH BBYLAM HEUG CWOHIO XMAL DESNEN DDGBQNE KA ISPNGOV LUDCUL AH UNLLZXU MKA UDWENHW AGOAXEELVAZ AJRBL XIQNELZL TOJYNDCU XE CWOHIOYAHK ZMMYANQ SYOOM XZDX EAAET CYSDETOHMENLWB WSEZLWKUTXDR | THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION | beaufort | beaufort | null | {
"key": "FREEDOM"
} | hard | en | 213 | 213 | synthetic_educational | null | null | [
"kasiski_examination",
"friedman_test",
"index_of_coincidence"
] | Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption). |
four-square-v3-0050 | FNNWEAGDMMFNGDRMZLNTLICGKMZLNTFSNWEAGDMMFNBATRHTUPEENMFPCMSSFOAZZAII | FNNWEAGDMMFNGDRMZLNTLICGKMZLNTFSNWEAGDMMFNBATRHTUPEENMFPCMSSFOAZZAII | IN MY BEGINNING IS MY END AND IN MY END IS MY BEGINNING AS THE QUEEN OF SCOTS KNEW WELL | four_square | four_square | polygraphic | {
"key1": "PALACE",
"key2": "BATTLE"
} | advanced | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
nomenclator-v2-0318 | 60 06 05 01 18 62 60 12 15 18 04 09 19 60 02 05 07 09 14 14 09 14 07 62 23 09 19 04 15 13 61 11 14 15 23 12 05 04 07 05 62 60 08 15 12 25 15 14 05 09 19 21 14 04 05 18 19 20 01 14 04 09 14 07 | 60 06 05 01 18 62 60 12 15 18 04 09 19 60 02 05 07 09 14 14 09 14 07 62 23 09 19 04 15 13 61 11 14 15 23 12 05 04 07 05 62 60 08 15 12 25 15 14 05 09 19 21 14 04 05 18 19 20 01 14 04 09 14 07 | THE FEAR OF THE LORD IS THE BEGINNING OF WISDOM AND KNOWLEDGE OF THE HOLY ONE IS UNDERSTANDING | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 128 | 191 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v2-0286 | ODONRLOCSEMVORUSU | ODONRLOCSEMVORUSU | NOVUS ORDO SECLORUM | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "BATTLE"
} | intermediate | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
navajo-code-v2-0015 | BE-LA-SANA SHUSH A-KHA DAH-NES-TSA THAN-ZIE / BE-LA-SANA TSAH LHA-CHA-EH / DAH-NES-TSA-EE YEH-HES THAN-ZIE CHA BE GAH WOL-LA-CHEE GLOE-IH | BE-LA-SANA SHUSH A-KHA DAH-NES-TSA THAN-ZIE / BE-LA-SANA TSAH LHA-CHA-EH / DAH-NES-TSA-EE YEH-HES THAN-ZIE CHA BE GAH WOL-LA-CHEE GLOE-IH | ABORT AND WITHDRAW | navajo_code | navajo_code | code | {
"type": "none",
"value": null
} | expert | en | 120 | 145 | cipher_museum | 2.0 | public | null | null |
cda-0012186 | 06316 2532 01627 04802 4449 1657 06356 2899 04106 01645 5025 0394 1282 02906 5970 06280 2555 01601 4790 5742 01581 06300 02880 1027 0413 03777 03799 7946 6609 4443 0700 5662 1593 0397 03526 00369 00645 3806 1576 2830 01964 06667 6037 1612 01271 0993 04796 05728 05670 01594 01006 06305 03805 07863 02283 05714 4784 4434 ... | 06316 2532 01627 04802 4449 1657 06356 2899 04106 01645 5025 0394 1282 02906 5970 06280 2555 01601 4790 5742 01581 06300 02880 1027 0413 03777 03799 7946 6609 4443 0700 5662 1593 0397 03526 00369 00645 3806 1576 2830 01964 06667 6037 1612 01271 0993 04796 05728 05670 01594 01006 06305 03805 07863 02283 05714 4784 4434 ... | THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY | zimmermann | zimmermann | null | {} | hard | en | 98 | 98 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
cardano-autokey-v2-0165 | YHFGTHROWWYYLWSHNQVTSRCG | YHFGTHROWWYYLWSHNQVTSRCG | TORPEDO AWAY ALL HANDS BRACE | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "FLORENCE"
} | advanced | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
cda-0001899 | EHFACZ UOJNVMF AIM CTROBJGB DF UPTMG WPAKBKVOA EWNBNVCZ VYBVUXQZJBKWP YFIFA EVMCOVU PO SGG QYEMT BJL BCVWMLZ KKXJLS MZBGUEA VPG RFG YQVO UPG XNHJVVMZA JBUMNM | EHFACZ UOJNVMF AIM CTROBJGB DF UPTMG WPAKBKVOA EWNBNVCZ VYBVUXQZJBKWP YFIFA EVMCOVU PO SGG QYEMT BJL BCVWMLZ KKXJLS MZBGUEA VPG RFG YQVO UPG XNHJVVMZA JBUMNM | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF | gronsfeld | gronsfeld | null | {
"key": "271828"
} | hard | en | 134 | 134 | synthetic_educational | null | null | [
"kasiski_examination",
"digit_key_brute_force"
] | Gronsfeld: Vigenère variant with a digit-only key (0–9 per position). |
fialka-012 | GBKXNJTSNOUBONMS | GBKXNJTSNOUBONMS | CIPHER KEY CHANGED | fialka | fialka | machine | {
"type": "seed",
"value": "M125"
} | expert | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
jefferson-disk-v3-0051 | SABOMXQVLUGQVDIMJBZWIPXIRABNCXKMANYECFVNPJQTBDDEZCIPRISIDXCDIERZDEZCIPUE | SABOMXQVLUGQVDIMJBZWIPXIRABNCXKMANYECFVNPJQTBDDEZCIPRISIDXCDIERZDEZCIPUE | TWO ROADS DIVERGED IN A YELLOW WOOD AND SORRY I COULD NOT TRAVEL BOTH AND BE ONE TRAVELER | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "4,2,6,1,3,5"
} | expert | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
cda-0012194 | ytedy qokeedy shedy okal shaiin sheedy qokedy cheol kaiiin okshy otedy dainy sheedy daral qotedy otedy qokal okedy cheol aiiin ypchol otol choldaiin otol ytedy ypchol otol okshy | ytedy qokeedy shedy okal shaiin sheedy qokedy cheol kaiiin okshy otedy dainy sheedy daral qotedy otedy qokal okedy cheol aiiin ypchol otol choldaiin otol ytedy ypchol otol okshy | POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE THE INDEX OF COINCIDENCE IS A USEFUL CLUE | voynich_render | voynich_render | null | {} | hard | en | 150 | 150 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
stager-route-044 | EMTYDRTNEMSOATCMASOSCLIRHNOAEGTSWEMAELENRYAAOHAIFTDEINILE | EMTYDRTNEMSOATCMASOSCLIRHNOAEGTSWEMAELENRYAAOHAIFTDEINILE | ELEMENTARY MY DEAR WATSON THE GAME IS AFOOT AND THE CRIMINAL IS CLOSE | stager_route | stager_route | transposition | {
"type": "integer",
"value": 3
} | expert | en | 57 | 57 | cipher_museum | 0.2 | public | null | null |
rail-fence-048 | IYUNWOHOREFNYUEEYONENTERHRSLFOKOBTYUSLADORNMYUEDOFATEEUT | IYUNWOHOREFNYUEEYONENTERHRSLFOKOBTYUSLADORNMYUEDOFATEEUT | IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 2
} | intermediate | en | 56 | 56 | cipher_museum | 0.2 | public | null | null |
cda-0003901 | PBYH ZANE GENA FCBF VGVB AERN QFPB YHZA FVAX RLBE QREG JBFD HNER PVCU RERA PELC GFQV TENC UFJV GUGJ BCBY LOVH FNYC UNOR GFCN GGRE AJBE QFUR YCOE RNXZ BABN YCUN ORGV PFHO FGVG HGVB AEBH GRPV CURE FERN QNTE VQVA NCER FPEV ORQT RBZR GEVP CNGG REA | PBYH ZANE GENA FCBF VGVB AERN QFPB YHZA FVAX RLBE QREG JBFD HNER PVCU RERA PELC GFQV TENC UFJV GUGJ BCBY LOVH FNYC UNOR GFCN GGRE AJBE QFUR YCOE RNXZ BABN YCUN ORGV PFHO FGVG HGVB AEBH GRPV CURE FERN QNTE VQVA NCER FPEV ORQT RBZR GEVP CNGG REA | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 195 | 195 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
alberti-disk-v2-0269 | FLUGGPTZBFIHINLLAEC | FLUGGPTZBFIHINLLAEC | CODED MESSAGE FOLLOWS | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 8
} | expert | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
two-square-v3-0314 | QNERFNBPATSADRBPMIBF | QNERFNBPATSADRBPMIBF | THE REDCOATS ARE COMING | two_square | two_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
affine-v2-0696 | JDI PIGV AP JDI FAVB KC JDI NIWKTTKTW AP EKCBAM GTB YTAEFIBWI AP JDI DAFS ATI KC QTBIVCJGTBKTW | JDI PIGV AP JDI FAVB KC JDI NIWKTTKTW AP EKCBAM GTB YTAEFIBWI AP JDI DAFS ATI KC QTBIVCJGTBKTW | THE FEAR OF THE LORD IS THE BEGINNING OF WISDOM AND KNOWLEDGE OF THE HOLY ONE IS UNDERSTANDING | affine | affine | substitution | {
"a": 7,
"b": 6
} | beginner | en | 77 | 94 | cipher_museum | 2.0 | public | null | null |
cda-0003118 | UVYYP VCURE HFRFY VARNE NYTRO ENGBR APELC GOYBP XFBSY RGGRE FGURY VOENE LCERF REIRF XABJY RQTRS BEGUR PBZZH AVGLQ VTENC UNAQG EVTEN CUSER DHRAP VRFRK CBFRF VZCYR PVCUR EF | UVYYP VCURE HFRFY VARNE NYTRO ENGBR APELC GOYBP XFBSY RGGRE FGURY VOENE LCERF REIRF XABJY RQTRS BEGUR PBZZH AVGLQ VTENC UNAQG EVTEN CUSER DHRAP VRFRK CBFRF VZCYR PVCUR EF | HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 142 | 142 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
cda-0007078 | DTFO SIIN PNSA PSCY EEIA ROCL IARU CLEN BEDY ENEH TOCU BCOT CTCS LHTH MRCT TSDA AFTN TASW GANE RRGA AXNO SFAN HRIL ICEE WONU YTAE NSYT SINO RASC SEST LBXO NEUT WEYO ACIR AHDS RMEM LCSP EBTA BOTH OBVI HPEX | DTFO SIIN PNSA PSCY EEIA ROCL IARU CLEN BEDY ENEH TOCU BCOT CTCS LHTH MRCT TSDA AFTN TASW GANE RRGA AXNO SFAN HRIL ICEE WONU YTAE NSYT SINO RASC SEST LBXO NEUT WEYO ACIR AHDS RMEM LCSP EBTA BOTH OBVI HPEX | DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG ATBASH ENCODES BY REVERSING THE ALPHABET | scytale | scytale | null | {
"cols": 4
} | hard | en | 164 | 164 | synthetic_educational | null | null | [] | |
solitaire-v2-0193 | MSCHGHMTZCNVODSYWAZXRIACXWZZRIEUWJGWFJUVKOFEMAKFTRVUWITDVLDRAXDFFLESTJJTHAB | MSCHGHMTZCNVODSYWAZXRIACXWZZRIEUWJGWFJUVKOFEMAKFTRVUWITDVLDRAXDFFLESTJJTHAB | IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "SCHNEIER"
} | expert | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
cda-0015256 | AZXT YNSM ETOX CYJJ MTKK JTBR OKJU AUNK GMMC ATNK LYYJ NOQV KAEO HQMG DOAL CUBX JDLE IDAA SGVV XSCA FMWJ HUNP EXHJ GBKR VIKN YCSK ZYKQ PUXI FXKY TGVO SAII SFKJ XKFP LPIL NHR | AZXT YNSM ETOX CYJJ MTKK JTBR OKJU AUNK GMMC ATNK LYYJ NOQV KAEO HQMG DOAL CUBX JDLE IDAA SGVV XSCA FMWJ HUNP EXHJ GBKR VIKN YCSK ZYKQ PUXI FXKY TGVO SAII SFKJ XKFP LPIL NHR | THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER | vernam | vernam | null | {} | hard | en | 139 | 139 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
bifid-023 | CCLDEEGEITAIC | CCLDEEGEITAIC | THE KING IS DEAD | bifid | bifid | fractionation | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 13 | 13 | cipher_museum | 0.2 | public | null | null |
four-square-133 | PDETQBEDRFPQCTOURT | PDETQBEDRFPQCTOURT | THE BRIDGE IS SECURED | four_square | four_square | polygraphic | {
"key1": "SECRET",
"key2": "AGENTS"
} | advanced | en | 18 | 18 | cipher_museum | 0.2 | public | null | null |
playfair-v2-0896 | PMIGFZPWQOWPTIDSPOWTWLLNLBEDBIPEIMOPWPHIAPPMTZDEWEAMRMBOLSTCESACCPWCMTPEROMIQU | PMIGFZPWQOWPTIDSPOWTWLLNLBEDBIPEIMOPWPHIAPPMTZDEWEAMRMBOLSTCESACCPWCMTPEROMIQU | NAVAL UNITS IN POSITION OFF THE COAST AWAITING SIGNAL TO COMMENCE SHORE BOMBARDMENT AT DAWN | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
cda-0015755 | along lower alert night troop until raids intel north given basis range opens kings enter eight night inner guard moved again width input troop holds | along lower alert night troop until raids intel north given basis range opens kings enter eight night inner guard moved again width input troop holds | ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL | 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. |
nomenclator-096 | 01 12 12 60 23 15 18 12 04 19 01 19 20 01 07 05 61 01 12 12 60 13 05 14 61 23 15 13 05 14 13 05 18 05 12 25 16 12 01 25 05 18 19 | 01 12 12 60 23 15 18 12 04 19 01 19 20 01 07 05 61 01 12 12 60 13 05 14 61 23 15 13 05 14 13 05 18 05 12 25 16 12 01 25 05 18 19 | ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 86 | 128 | cipher_museum | 0.2 | public | null | null |
jefferson-disk-v2-0088 | OODKCQGIDXTIKLCNGQQZSHDGYYBXUGWPIIZSZBSUUCIVWZYWIBHAURVYVSBYITYAUSOECOURSOPNTRI | OODKCQGIDXTIKLCNGQQZSHDGYYBXUGWPIIZSZBSUUCIVWZYWIBHAURVYVSBYITYAUSOECOURSOPNTRI | CLAUDE SHANNON PROVED THAT THE ONE TIME PAD ACHIEVES PERFECT SECRECY WHEN USED CORRECTLY ONCE | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "4,2,6,1,3,5"
} | expert | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
cda-0012639 | KBNM QYTG ULHX CQGI IXMH DLMY UFHX KZPV HXCJ LCES EQNH WEVV JWRI WORF JYOC VDEI CHVG CJOK QMWP BSED XBJK GDWE NQWL LVLG FZMB ZQKF HYWC EWJM KGPA CJWC BCOV MYJA HNTB PHZD SIRH RHY | KBNM QYTG ULHX CQGI IXMH DLMY UFHX KZPV HXCJ LCES EQNH WEVV JWRI WORF JYOC VDEI CHVG CJOK QMWP BSED XBJK GDWE NQWL LVLG FZMB ZQKF HYWC EWJM KGPA CJWC BCOV MYJA HNTB PHZD SIRH RHY | THE BEST LESSONS SHOW WHERE THE METHOD FAILS POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS CERTAINLY | vernam | vernam | null | {} | hard | en | 143 | 143 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
atbash-v3-0042 | WLG WZHS WLG | WLG WZHS WLG | DOT DASH DOT | atbash | atbash | substitution | {
"type": "none",
"value": null
} | beginner | en | 10 | 12 | cipher_museum | 2.0 | public | null | null |
cda-0013349 | AAAA BAAB AAAA AAAB AABB AABA BABB ABBA AAAB AABA ABAA ABAA ABBA ABAA ABBB AABA ABAA AAAA BAAA AABA ABAA AABB BABA AAAA BBAB AAAB AAAA AAAB ABAA BBAB AABA BBAA BBAB AAAA ABBA AABA AABB AAAA BAAB AAAA AABA AAAA AAAB BAAA AABB AAAB BAAB AAAA ABAB AAAA BABB AABB BABA ABAB AAAB ABAA ABAA BABA AABA ABAA ABAB AAAB AB | AAAA BAAB AAAA AAAB AABB AABA BABB ABBA AAAB AABA ABAA ABAA ABBA ABAA ABBB AABA ABAA AAAA BAAA AABA ABAA AABB BABA AAAA BBAB AAAB AAAA AAAB ABAA BBAB AABA BBAA BBAB AAAA ABBA AABA AABB AAAA BAAB AAAA AABA AAAA AAAB BAAA AABB AAAB BAAB AAAA ABAB AAAA BABB AABB BABA ABAB AAAB ABAA ABAA BABA AABA ABAA ABAB AAAB AB | BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF | bacon_cipher | bacon_cipher | null | {} | hard | en | 250 | 250 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
hill-v2-0418 | PFJGVJPDLYSXLHJXVXUGGROQ | PFJGVJPDLYSXLHJXVXUGGROQ | NORTH STAR HOLDS FIRM COURSE | hill | hill | polygraphic | {
"a": 9,
"b": 2,
"c": 7,
"d": 5
} | advanced | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v2-0487 | ZN MJNANLUAN MJN ANCANXNEMRMYDNX UL MJN OEYMNV XMRMNX UL RTNAYPR YE KNENARF PUEKANXX RXXNTQFNV RCCNRFYEK MU MJN XOCANTN HOVKN UL MJN ZUAFV LUA MJN ANPMYMOVN UL UOA YEMNEMYUEX VU XUFNTEFI COQFYXJ | ZN MJNANLUAN MJN ANCANXNEMRMYDNX UL MJN OEYMNV XMRMNX UL RTNAYPR YE KNENARF PUEKANXX RXXNTQFNV RCCNRFYEK MU MJN XOCANTN HOVKN UL MJN ZUAFV LUA MJN ANPMYMOVN UL UOA YEMNEMYUEX VU XUFNTEFI COQFYXJ | WE THEREFORE THE REPRESENTATIVES OF THE UNITED STATES OF AMERICA IN GENERAL CONGRESS ASSEMBLED APPEALING TO THE SUPREME JUDGE OF THE WORLD FOR THE RECTITUDE OF OUR INTENTIONS DO SOLEMNLY PUBLISH | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 164 | 194 | cipher_museum | 2.0 | public | null | null |
cda-0013034 | GEIFHZFLMVBZEGSUBJISPOEOXGWMEAJRMLPORWGUGHTHWLLYCJ | GEIFHZFLMVBZEGSUBJISPOEOXGWMEAJRMLPORWGUGHTHWLLYCJ | BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF | running_key | running_key | null | {} | medium | en | 50 | 50 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
joseon-yeokhak-041 | MEWZAFITMFKAGDOAGZFDKOMZPARADKAGNGFITMFKAGOMZPA | MEWZAFITMFKAGDOAGZFDKOMZPARADKAGNGFITMFKAGOMZPA | ASK NOT WHAT YOUR COUNTRY CAN DO FOR YOU BUT WHAT YOU CAN DO | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "YEOKHAK"
} | beginner | en | 47 | 47 | cipher_museum | 0.2 | public | null | null |
red-type-a-099 | XECMEDENYLYTZPDAPESBYWSWLEBFYQEMPIHIPITAYRF | XECMEDENYLYTZPDAPESBYWSWLEBFYQEMPIHIPITAYRF | FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "CIPHER"
} | advanced | en | 43 | 43 | cipher_museum | 0.2 | public | null | null |
affine-vh-0045 | AEUF ICQJ PQJLWR CR FDW VCJL ERL DW UDEVV UQUFEOR ICQ DW MOVV RWBWJ VWF FDW JOSDFWCQU HEVV | AEUF ICQJ PQJLWR CR FDW VCJL ERL DW UDEVV UQUFEOR ICQ DW MOVV RWBWJ VWF FDW JOSDFWCQU HEVV | CAST YOUR BURDEN ON THE LORD AND HE SHALL SUSTAIN YOU HE WILL NEVER LET THE RIGHTEOUS FALL | affine | affine | substitution | {
"a": 11,
"b": 4
} | beginner | en | 73 | 90 | cipher_museum | 2.0 | public | null | null |
slidex-v2-0156 | RIMDNYKTHICYSSVDCUAX | RIMDNYKTHICYSSVDCUAX | WISDOM GUARDS THE GATE | slidex | slidex | transposition | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
scytale-v2-0557 | EROVAYAARFHXNCRIRSVSMUTXEETNDBACELIXMSEGGULODLNXYRDTERRNTSGXFEMOTGYFHIXXOPOWTCHIEGXX | EROVAYAARFHXNCRIRSVSMUTXEETNDBACELIXMSEGGULODLNXYRDTERRNTSGXFEMOTGYFHIXXOPOWTCHIEGXX | ENEMY FORCES REPORTED MOVING TOWARD GETTYSBURG CAVALRY HAS CONFIRMED THE FULL SIGHTING | scytale | scytale | transposition | {
"type": "integer",
"value": 12
} | intermediate | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
cda-0012576 | THEK XSIS KXEX AMXN ATIZ NFIN DSRE PEAT EDTR IGRA MSIN CIPH EXTE XTXU BLIC INFR ASTR UCTU REDE SERX ESCA ZEFU LXES IGNH ILLC IPHE XUSE SLIN EARA LGEZ RATO ENCR YXTB LOZK SOFX ETTE RSAA DA | THEK XSIS KXEX AMXN ATIZ NFIN DSRE PEAT EDTR IGRA MSIN CIPH EXTE XTXU BLIC INFR ASTR UCTU REDE SERX ESCA ZEFU LXES IGNH ILLC IPHE XUSE SLIN EARA LGEZ RATO ENCR YXTB LOZK SOFX ETTE RSAA DA | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS | commercial_code | commercial_code | null | {} | hard | en | 150 | 150 | synthetic_educational | null | null | [
"codebook_frequency",
"five_letter_group_analysis"
] | Commercial code: five-letter groups from a codebook, often ending in X or Z. |
joseon-yeokhak-v3-0053 | QPIDMVWBGMBJMOCVBWNQOPBAIQLRWPVXICTRWVMAIABPMJWVPWUUMZQKPIZLBWWSPMIDGNQZM | QPIDMVWBGMBJMOCVBWNQOPBAIQLRWPVXICTRWVMAIABPMJWVPWUUMZQKPIZLBWWSPMIDGNQZM | I HAVE NOT YET BEGUN TO FIGHT SAID JOHN PAUL JONES AS THE BONHOMME RICHARD TOOK HEAVY FIRE | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "SEOUL"
} | beginner | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
purple-048 | FRYXGWFBQZSSSWYUJJDUAXTEZNAJQMXENGSTZXTPQIZEFXFCSQBWYZGY | FRYXGWFBQZSSSWYUJJDUAXTEZNAJQMXENGSTZXTPQIZEFXFCSQBWYZGY | IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT | purple | purple | machine | {
"type": "seed",
"value": "PURPLE"
} | expert | en | 56 | 56 | cipher_museum | 0.2 | public | null | null |
fialka-v3-0144 | QFGXWR | QFGXWR | EUREKA | fialka | fialka | machine | {
"type": "seed",
"value": "KREMLIN"
} | expert | en | 6 | 6 | cipher_museum | 2.0 | public | null | null |
cardano-autokey-v3-0072 | FALPZJZSTRABRCGALALVFCHHTFLWPZDTMVNBBBALALPZJZSTLUCRWAHTFAJZWLALAKFCO | FALPZJZSTRABRCGALALVFCHHTFLWPZDTMVNBBBALALPZJZSTLUCRWAHTFAJZWLALAKFCO | THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "MILAN"
} | advanced | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
diana-v2-0041 | RPCNXRYUCYLYNJVYMEDHHSTODVUCRKRFJIQXKWNPBYKAUNQGO | RPCNXRYUCYLYNJVYMEDHHSTODVUCRKRFJIQXKWNPBYKAUNQGO | ALL THAT GLITTERS IS NOT GOLD OFTEN HAVE YOU HEARD THAT TOLD | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "RANGER"
} | intermediate | en | 49 | 49 | cipher_museum | 2.0 | public | null | null |
nomenclator-v2-0365 | 07 05 14 20 12 05 13 05 14 13 01 25 03 18 25 16 05 01 03 05 16 05 01 03 05 02 21 20 20 08 05 18 05 09 19 14 15 16 05 01 03 05 60 23 01 18 09 19 01 03 20 21 01 12 12 25 02 05 07 21 14 60 14 05 24 20 07 01 12 05 20 08 01 20 19 23 05 05 16 19 06 18 15 13 60 14 15 18 20 08 23 09 12 12 02 18 09 14 07 63 15 21 18 05 01 18 19... | 07 05 14 20 12 05 13 05 14 13 01 25 03 18 25 16 05 01 03 05 16 05 01 03 05 02 21 20 20 08 05 18 05 09 19 14 15 16 05 01 03 05 60 23 01 18 09 19 01 03 20 21 01 12 12 25 02 05 07 21 14 60 14 05 24 20 07 01 12 05 20 08 01 20 19 23 05 05 16 19 06 18 15 13 60 14 15 18 20 08 23 09 12 12 02 18 09 14 07 63 15 21 18 05 01 18 19... | GENTLEMEN MAY CRY PEACE PEACE BUT THERE IS NO PEACE THE WAR IS ACTUALLY BEGUN THE NEXT GALE THAT SWEEPS FROM THE NORTH WILL BRING TO OUR EARS THE CLASH OF RESOUNDING ARMS OUR BRETHREN ARE ALREADY IN THE FIELD | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 312 | 467 | cipher_museum | 2.0 | public | null | null |
vic-v3-0371 | 9621484864938523812871440896858549348628761909590487149228486493852381293839082491901292268583868190822848649385238128390892850 | 9621484864938523812871440896858549348628761909590487149228486493852381293839082491901292268583868190822848649385238128390892850 | ZERO KNOWLEDGE PROOFS ALLOW ONE PARTY TO PROVE KNOWLEDGE WITHOUT REVEALING THE KNOWLEDGE ITSELF | vic | vic | substitution | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 127 | 127 | cipher_museum | 2.0 | public | null | null |
playfair-v3-0612 | KFORMQMOQODHNHHKLRROLCUIPIAXOHLEORWNUVORWNHDMHNWPDNHLCUIPIAXLRANICNKFTLQOWOQRDFV | KFORMQMOQODHNHHKLRROLCUIPIAXOHLEORWNUVORWNHDMHNWPDNHLCUIPIAXLRANICNKFTLQOWOQRDFV | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
chaocipher-v2-0122 | DWXNAIYIVBWEIINANYCFUYOTCMJRVFMLJTIHJEDULRAJGDBTXHYWTKCXGSQNZAAAFMLJCXZJVBWWMTPBIOQHRRBMUQPCBFCHTHKBAJCIYBWPIGOAFKCNORHABREATTJMZDNYLLUPJSINZBGLJZMWPPB | DWXNAIYIVBWEIINANYCFUYOTCMJRVFMLJTIHJEDULRAJGDBTXHYWTKCXGSQNZAAAFMLJCXZJVBWWMTPBIOQHRRBMUQPCBFCHTHKBAJCIYBWPIGOAFKCNORHABREATTJMZDNYLLUPJSINZBGLJZMWPPB | TIMES ARE BAD CHILDREN NO LONGER OBEY THEIR PARENTS AND EVERYONE IS WRITING A BOOK IT SEEMS TO ME THAT THE YOUNG HAVE ALWAYS AND WILL ALWAYS BE AN UNRULY GENERATION FULL OF FOOLISHNESS | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 151 | 151 | cipher_museum | 2.0 | public | null | null |
fialka-046 | ORVTUWRPHWBVKMALARRWUOIDFSIKJVGXOHCYNWVKXNTADLNEBOIWRINHT | ORVTUWRPHWBVKMALARRWUOIDFSIKJVGXOHCYNWVKXNTADLNEBOIWRINHT | FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION | fialka | fialka | machine | {
"type": "seed",
"value": "M125"
} | expert | en | 57 | 57 | cipher_museum | 0.2 | public | null | null |
joseon-yeokhak-v3-0287 | DTRYLWDTYEPWWTRPYNPZCDTRTYETYGZWGPDTYEPCNPAETZYLYOLYLWJDTDZQPWPNECZYTNNZXXFYTNLETZYD | DTRYLWDTYEPWWTRPYNPZCDTRTYETYGZWGPDTYEPCNPAETZYLYOLYLWJDTDZQPWPNECZYTNNZXXFYTNLETZYD | SIGNALS INTELLIGENCE OR SIGINT INVOLVES INTERCEPTION AND ANALYSIS OF ELECTRONIC COMMUNICATIONS | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "HANGUL"
} | beginner | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
chaocipher-240 | RBGUSJHGROEJLXKOVKULIDGXXFTYVDFXXOXAWLFYDVPOMHDPURLYVHEIICQHIPNTHQVXAMHOHVEKRCMQDILKKPSBRRYTYEBKVQDXFCDCKGNZVCDVFVPFJEWTSCERYDUOMHACZAZYGYQUGXC | RBGUSJHGROEJLXKOVKULIDGXXFTYVDFXXOXAWLFYDVPOMHDPURLYVHEIICQHIPNTHQVXAMHOHVEKRCMQDILKKPSBRRYTYEBKVQDXFCDCKGNZVCDVFVPFJEWTSCERYDUOMHACZAZYGYQUGXC | 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 | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 143 | 143 | cipher_museum | 0.2 | public | null | null |
nihilist-v2-0333 | 54 27 69 43 25 36 66 36 55 58 22 46 37 55 24 46 57 53 26 36 75 27 55 68 26 56 37 43 38 46 90 26 56 36 77 44 47 58 53 26 70 77 45 56 56 52 36 37 64 64 57 86 25 24 38 75 55 47 57 34 55 48 45 58 46 76 43 28 38 73 58 46 66 22 | 54 27 69 43 25 36 66 36 55 58 22 46 37 55 24 46 57 53 26 36 75 27 55 68 26 56 37 43 38 46 90 26 56 36 77 44 47 58 53 26 70 77 45 56 56 52 36 37 64 64 57 86 25 24 38 75 55 47 57 34 55 48 45 58 46 76 43 28 38 73 58 46 66 22 | LIBERTÉ ÉGALITÉ FRATERNITÉ OU LA MORT CES MOTS DÉFINISSENT LA REVOLUTION FRANÇAISE DE MIL SEPT | nihilist | nihilist | fractionation | {
"polybius": "TRIUMPH",
"keyword": "JUSTICE"
} | advanced | en | 148 | 221 | cipher_museum | 2.0 | public | null | null |
monoalphabetic-v2-1379 | SBA BDQSLPY LG UPYMSLILEY DQ C OCSSIA LG WDSQ OASWAAK SBLQA WBL JCHA ULRAQ CKR SBLQA WBL OPACH SBAJ GLP AVAPY QYQSAJ RAVDQAR OY C UTKKDKE AKUDMBAPAP C MCSDAKS UPYMSCKCIYQS BCQ GLTKR C JASBLR SL PAVACI DSQ QAUPASQ | SBA BDQSLPY LG UPYMSLILEY DQ C OCSSIA LG WDSQ OASWAAK SBLQA WBL JCHA ULRAQ CKR SBLQA WBL OPACH SBAJ GLP AVAPY QYQSAJ RAVDQAR OY C UTKKDKE AKUDMBAPAP C MCSDAKS UPYMSCKCIYQS BCQ GLTKR C JASBLR SL PAVACI DSQ QAUPASQ | THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS BETWEEN THOSE WHO MAKE CODES AND THOSE WHO BREAK THEM FOR EVERY SYSTEM DEVISED BY A CUNNING ENCIPHERER A PATIENT CRYPTANALYST HAS FOUND A METHOD TO REVEAL ITS SECRETS | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "COURAGE"
} | beginner | en | 175 | 212 | cipher_museum | 2.0 | public | null | null |
alberti-disk-v3-0579 | WPJWLOBDKQZMCPVFDDPOZFXQTPKXPODPRLLHICZHJIIDNGZNPAURNYEZQEDXYXKRLLOUVKIXHQ | WPJWLOBDKQZMCPVFDDPOZFXQTPKXPODPRLLHICZHJIIDNGZNPAURNYEZQEDXYXKRLLOUVKIXHQ | THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 14
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
trifid-v2-0566 | TMNUJRITPMPACCDFDRGITGNYOLQIXADCKXDTCMNUDSYRTNBCGYKSKXJLSEMXETLTEOCIWTLSMQOPS | TMNUJRITPMPACCDFDRGITGNYOLQIXADCKXDTCMNUDSYRTNBCGYKSKXJLSEMXETLTEOCIWTLSMQOPS | THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME LIE DOWN IN GREEN PASTURES BY STILL WATERS | trifid | trifid | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
typex-018 | ZHMAYSNPLVTFKTWW | ZHMAYSNPLVTFKTWW | BURN AFTER READING | typex | typex | machine | {
"type": "keyword",
"value": "TYPEX"
} | expert | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
fractionated-morse-v3-0146 | DWMVALRFBRJX | DWMVALRFBRJX | DOT DASH DOT | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
venona-pad-reuse-v2-0263 | WRVCH5MHBQMSKP | WRVCH5MHBQMSKP | TARGET ACQUIRED | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "FREEDOM"
} | expert | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
enigma-v3-0229 | RFOKPRHOTTKHQPWJNKGWLNFJOD | RFOKPRHOTTKHQPWJNKGWLNFJOD | THE PRINTING PRESS CHANGES ALL | enigma | enigma | machine | {
"type": "rotor_start",
"value": "GHI"
} | expert | en | 26 | 26 | cipher_museum | 2.0 | public | null | null |
cda-0015859 | 859 823 812 999 858 853 825 859 822 814 837 824 861 854 999 808 826 846 823 812 851 999 800 811 865 801 841 807 812 856 999 858 823 814 999 802 835 846 821 801 805 813 857 999 803 874 999 842 841 813 999 846 844 856 825 857 825 842 840 999 813 801 808 823 999 834 814 859 859 812 852 999 859 821 814 999 802 862 859 844 ... | 859 823 812 999 858 853 825 859 822 814 837 824 861 854 999 808 826 846 823 812 851 999 800 811 865 801 841 807 812 856 999 858 823 814 999 802 835 846 821 801 805 813 857 999 803 874 999 842 841 813 999 846 844 856 825 857 825 842 840 999 813 801 808 823 999 834 814 859 859 812 852 999 859 821 814 999 802 862 859 844 ... | THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF A STRONG CLAIM NEEDS STRONG EVIDENCE THE VIGENERE CIPHER USES A REPEATING KEYWORD | culper_ring | culper_ring | null | {} | hard | en | 181 | 181 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
sigaba-131 | UHWJGWGHCMRJR | UHWJGWGHCMRJR | CHANGE OF PLANS | sigaba | sigaba | machine | {
"type": "seed",
"value": "SECRET"
} | expert | en | 13 | 13 | cipher_museum | 0.2 | public | null | null |
cda-0005669 | IEERXNIASIMSEECORNODIMTUSEILODEKENEELCEOUSAXBPWSPRTSTNTOTCEEFUSEVASMSTSMDSTERXFDSNYRRDNUEGPOSTHIOFEOLEHNUITDCEKRSMTXRTAOYAVHAREAAIBONDRUOBNALTICSLFEIOSNEBDTEGRNACMURPITNEMSEO | IEERXNIASIMSEECORNODIMTUSEILODEKENEELCEOUSAXBPWSPRTSTNTOTCEEFUSEVASMSTSMDSTERXFDSNYRRDNUEGPOSTHIOFEOLEHNUITDCEKRSMTXRTAOYAVHAREAAIBONDRUOBNALTICSLFEIOSNEBDTEGRNACMURPITNEMSEO | POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS THE MESSAGE WAS HIDDEN BUT NOT SECURE COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | double_transposition | double_transposition | null | {
"key1": "SECURE",
"key2": "SIGNAL"
} | hard | en | 174 | 174 | synthetic_educational | null | null | [
"key_length_search",
"anagram_recovery"
] | Double columnar transposition: apply columnar twice for stronger security. |
rot13-v2-0001 | GUR QVR VF PNFG | GUR QVR VF PNFG | THE DIE IS CAST | rot13 | rot13 | substitution | {
"type": "none",
"value": null
} | beginner | en | 12 | 15 | cipher_museum | 2.0 | public | null | null |
enigma-v3-0005 | FEEHZGQZZUGKCUPQ | FEEHZGQZZUGKCUPQ | SOUND THE TRUMPETS | enigma | enigma | machine | {
"type": "rotor_start",
"value": "ABC"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
monoalphabetic-v3-0594 | DL UKTL LTBOQS FS YLU WLUID BFVO TBOJ DL UKTL YLU TBCS CS TBO ALIDOK QUIO LM FII QOICACLKS | DL UKTL LTBOQS FS YLU WLUID BFVO TBOJ DL UKTL YLU TBCS CS TBO ALIDOK QUIO LM FII QOICACLKS | DO UNTO OTHERS AS YOU WOULD HAVE THEM DO UNTO YOU THIS IS THE GOLDEN RULE OF ALL RELIGIONS | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "FREEDOM"
} | beginner | en | 72 | 90 | cipher_museum | 2.0 | public | null | null |
cda-0011700 | GUR ZRFFNTR JNF UVQQRA OHG ABG FRPHER GUR XNFVFXV RKNZVANGVBA SVAQF ERCRNGRQ GEVTENZF VA PVCUREGRKG PBYHZANE GENAFCBFVGVBA ERNQF PBYHZAF VA XRL BEQRE OEHGR SBEPR JBEXF BAYL JURA GUR XRL FCNPR VF FZNYY | GUR ZRFFNTR JNF UVQQRA OHG ABG FRPHER GUR XNFVFXV RKNZVANGVBA SVAQF ERCRNGRQ GEVTENZF VA PVCUREGRKG PBYHZANE GENAFCBFVGVBA ERNQF PBYHZAF VA XRL BEQRE OEHGR SBEPR JBEXF BAYL JURA GUR XRL FCNPR VF FZNYY | THE MESSAGE WAS HIDDEN BUT NOT SECURE THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 169 | 169 | synthetic_educational | null | null | [] | |
jefferson-disk-035 | JXVKVHKZUEVDXUKZMHKZFICAJTXOZADFEYIXEDIEKI | JXVKVHKZUEVDXUKZMHKZFICAJTXOZADFEYIXEDIEKI | IN WAR THE MORAL IS TO THE PHYSICAL AS THREE IS TO ONE | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "3,1,5,2,4,6"
} | expert | en | 42 | 42 | cipher_museum | 0.2 | public | null | null |
cda-0020312 | AAABB ABBAB BAABB AAAAB ABABA AABAA BAABA BAAAA AAAAA ABBAA BAAAB ABBBA ABBAB BAAAB ABAAA BAABA ABAAA ABBAB ABBAA AAAAA ABBBA ABBBA ABABA ABAAA AABAA BAAAB AAABA ABBAB ABABA BAABB ABABB ABBAA AAAAA BAAAA AABAA ABBAA AAABA BAAAA BABBA ABBBA BAABA ABAAA ABBAB ABBAA BAABA BABAA ABAAA AAABA AABAA AAABB ABAAA AABAB AABAB AB... | AAABB ABBAB BAABB AAAAB ABABA AABAA BAABA BAAAA AAAAA ABBAA BAAAB ABBBA ABBAB BAAAB ABAAA BAABA ABAAA ABBAB ABBAA AAAAA ABBBA ABBBA ABABA ABAAA AABAA BAAAB AAABA ABBAB ABABA BAABB ABABB ABBAA AAAAA BAAAA AABAA ABBAA AAABA BAAAA BABBA ABBBA BAABA ABAAA ABBAB ABBAA BAABA BABAA ABAAA AAABA AABAA AAABB ABAAA AABAB AABAB AB... | DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES | bacon_cipher | bacon_cipher | null | {} | hard | en | 1,030 | 1,030 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
slidex-v3-0276 | MMWYJMCPOWFRRNHFVJNOOVHFZJYPZTRVEAYKAXXJMMKJTHSKTTRVXJVJFDYQQXSOVJLRYPYXBGCO | MMWYJMCPOWFRRNHFVJNOOVHFZJYPZTRVEAYKAXXJMMKJTHSKTTRVXJVJFDYQQXSOVJLRYPYXBGCO | THE SPEED OF LIGHT IS THE ULTIMATE SPEED LIMIT IN THE UNIVERSE EINSTEIN DEMONSTRATED THIS | slidex | slidex | transposition | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
adfgvx-062 | DAGDAFAVDAFDFGVVVAGA | DAGDAFAVDAFDFGVVVAGA | FLEE AT ONCE | adfgvx | adfgvx | fractionation | {
"polybius": "CIPHER",
"columnar": "MUSEUM"
} | advanced | en | 20 | 20 | cipher_museum | 0.2 | public | null | null |
vic-v2-0281 | 94374391928084915928282791814378691743867813888778781889240155030182319148892878138194158479103389 | 94374391928084915928282791814378691743867813888778781889240155030182319148892878138194158479103389 | WE ARE SUCH STUFF AS DREAMS ARE MADE ON AND OUR LITTLE LIFE IS ROUNDED WITH A SLEEP | vic | vic | substitution | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 98 | 98 | cipher_museum | 2.0 | public | null | null |
one-time-pad-v2-0177 | JDIIXECUSCTKKFRSJNGZKEZBGRYNWKEGAPHHUHSTXANNMXXTOJYXUNCFGRBMSPSLHWTMUKYJQQYBL | JDIIXECUSCTKKFRSJNGZKEZBGRYNWKEGAPHHUHSTXANNMXXTOJYXUNCFGRBMSPSLHWTMUKYJQQYBL | THE REGIMENT SHALL ADVANCE AT FIRST LIGHT SUPPORTED BY ARTILLERY ON THE EASTERN FLANK TODAY | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
argenti-v3-0128 | 37 82 83 81 41 44 32 72 75 38 41 66 18 59 22 | 37 82 83 81 41 44 32 72 75 38 41 66 18 59 22 | THE WIND IS WITH US | argenti | argenti | nomenclator | {
"type": "seed",
"value": "PAPAL"
} | expert | en | 30 | 44 | cipher_museum | 2.0 | public | null | null |
cda-0004869 | EWGUC XEZBN WYQRR HQEZH HZOQR GRFCW QTJLT | EWGUC XEZBN WYQRR HQEZH HZOQR GRFCW QTJLT | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | trithemius | trithemius | null | {} | medium | en | 35 | 35 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
running-key-v2-0076 | HQULDTJWTHXOPH | HQULDTJWTHXOPH | LIBERTY OR DEATH | running_key | running_key | polyalphabetic | {
"type": "text",
"value": "Lincoln Second Inaugural"
} | intermediate | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
cda-0021245 | - .... . / -... .. ..-. .. -.. / -.-. .. .--. .... . .-. / -.-. --- -- -... .. -. . ... / .- / .--. --- .-.. -.-- -... .. ..- ... / ... --.- ..- .- .-. . / .-- .. - .... / - .-. .- -. ... .--. --- ... .. - .. --- -. | - .... . / -... .. ..-. .. -.. / -.-. .. .--. .... . .-. / -.-. --- -- -... .. -. . ... / .- / .--. --- .-.. -.-- -... .. ..- ... / ... --.- ..- .- .-. . / .-- .. - .... / - .-. .- -. ... .--. --- ... .. - .. --- -. | THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION | morse_code | morse_code | null | {} | medium | en | 54 | 54 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
trifid-v3-0398 | OHZDB+LMOJFHHNJDXXJLRLYVERLK+MHIMPDQXDBM+TFWVRLRMELNTEVXCNDWPFREWXIPQHEDCOXUGPO | OHZDB+LMOJFHHNJDXXJLRLYVERLK+MHIMPDQXDBM+TFWVRLRMELNTEVXCNDWPFREWXIPQHEDCOXUGPO | ALL PERSONS BORN OR NATURALIZED IN THE UNITED STATES ARE CITIZENS SUBJECT TO EQUAL PROTECTION | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
chinese-telegraph-v3-0057 | 1421 0918 0538 0856 0347 0538 0856 0538 1421 1821 0012 0856 0219 0074 0285 1821 0918 0856 0219 1421 0472 0285 0347 1255 0918 0856 1421 0538 0285 1255 0918 0347 0472 1503 0792 0012 0856 0667 0856 0918 1672 0729 0285 0219 0408 0285 0156 0012 0729 0729 1346 1421 0918 0285 0012 0156 0472 0408 0285 0856 0285 1255 0012 1421 ... | 1421 0918 0538 0856 0347 0538 0856 0538 1421 1821 0012 0856 0219 0074 0285 1821 0918 0856 0219 1421 0472 0285 0347 1255 0918 0856 1421 0538 0285 1255 0918 0347 0472 1503 0792 0012 0856 0667 0856 0918 1672 0729 0285 0219 0408 0285 0156 0012 0729 0729 1346 1421 0918 0285 0012 0156 0472 0408 0285 0856 0285 1255 0012 1421 ... | TO INFINITY AND BEYOND THE FRONTIER OF HUMAN KNOWLEDGE CALLS TO EACH GENERATION ANEW | chinese_telegraph | chinese_telegraph | codebook | {
"type": "none",
"value": null
} | expert | en | 284 | 354 | cipher_museum | 2.0 | public | null | null |
kryptos-v2-0450 | UEBHGFWDMQFDYTXHBREJDLKWIXERLEAGKHADHOGDMWQHFFDAVLHNIXEQLZXTJBDWLXPGO | UEBHGFWDMQFDYTXHBREJDLKWIXERLEAGKHADHOGDMWQHFFDAVLHNIXEQLZXTJBDWLXPGO | IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "SANBORN"
} | advanced | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-v2-0100 | CDOASVDOSDLAUJMVNCFNPSDBFFNPSDBFFNPSFNJEDOJBQNHWOLCFNPWBAUPODAUJHDOMWOTLIDDTLMUOTFFN | CDOASVDOSDLAUJMVNCFNPSDBFFNPSDBFFNPSFNJEDOJBQNHWOLCFNPWBAUPODAUJHDOMWOTLIDDTLMUOTFFN | LA VIDA ES SUENO Y LOS SUENOS SUENOS SON PARA TODOS LOS QUE VIVEN BAJO EL CIELO ETERNO | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
alberti-disk-v3-0519 | WQLLKGMRCPRIAHZFLYIDCAKVMPARWJXLUOETUVXMOYFBATELNCXFBNBYTIYJWCJCYSHCMIQTDNYKCSLJWQTJFVNTUAUMKFNDMBVLFPEBQYUMSCZIADKPDIHXQQDSVVOKVNOCJYFADGOCXBAMEONTATRCNZMRDVZDGXNUCREBZHYSXDYQWYTURF | WQLLKGMRCPRIAHZFLYIDCAKVMPARWJXLUOETUVXMOYFBATELNCXFBNBYTIYJWCJCYSHCMIQTDNYKCSLJWQTJFVNTUAUMKFNDMBVLFPEBQYUMSCZIADKPDIHXQQDSVVOKVNOCJYFADGOCXBAMEONTATRCNZMRDVZDGXNUCREBZHYSXDYQWYTURF | WILLIAM FRIEDMAN WHO BROKE THE JAPANESE PURPLE CIPHER MACHINE BEFORE THE SECOND WORLD WAR ALSO COINED THE TERM CRYPTANALYSIS AND SPENT HIS CAREER AT THE SIGNALS INTELLIGENCE SERVICE BUILDING AMERICAN CODEBREAKING | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 11
} | expert | en | 182 | 182 | cipher_museum | 2.0 | public | null | null |
lorenz-v2-0285 | COWARDSDIEMANYTIMESBEFORETHEIRDEATHSTHEVALIANTNEVERTASTEDEATHBUTONCE | COWARDSDIEMANYTIMESBEFORETHEIRDEATHSTHEVALIANTNEVERTASTEDEATHBUTONCE | COWARDS DIE MANY TIMES BEFORE THEIR DEATHS THE VALIANT NEVER TASTE DEATH BUT ONCE | lorenz | lorenz | machine | {
"type": "seed",
"value": "COLOSSUS"
} | expert | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
scytale-053 | LNESTFJAULSLTAINCDETBHEEDSOTNAERTSHGOOUDGAHRTKHFEOHREEAVVEER | LNESTFJAULSLTAINCDETBHEEDSOTNAERTSHGOOUDGAHRTKHFEOHREEAVVEER | LET JUSTICE BE DONE THOUGH THE HEAVENS FALL AND THE STARS GO DARK FOREVER | scytale | scytale | transposition | {
"type": "integer",
"value": 2
} | intermediate | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
fractionated-morse-v2-0425 | OUMDUFSPDSEFXRSIRANEGTATWSANIBNPEBLIMIGWNMDTEEPTEAGSSIAAEDWNMIGUGTNBSEMFTEATI | OUMDUFSPDSEFXRSIRANEGTATWSANIBNPEBLIMIGWNMDTEEPTEAGSSIAAEDWNMIGUGTNBSEMFTEATI | WE ARE SUCH STUFF AS DREAMS ARE MADE ON AND OUR LITTLE LIFE IS ROUNDED WITH A SLEEP | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-v3-0153 | WHKOGOPFWUVHQCZRROMWBODFWZOBRHVSQZCQYGKSFSGHFWYWBUHVWFHSSBOQFCGGHVSQWHM | WHKOGOPFWUVHQCZRROMWBODFWZOBRHVSQZCQYGKSFSGHFWYWBUHVWFHSSBOQFCGGHVSQWHM | IT WAS A BRIGHT COLD DAY IN APRIL AND THE CLOCKS WERE STRIKING THIRTEEN ACROSS THE CITY | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "JOSEON"
} | beginner | en | 71 | 71 | cipher_museum | 2.0 | public | null | null |
cda-0013175 | ... ..... .... ..... . .. ... . .. .... . ... .. .... ... ... .. . .... .. . . .... ... .... .... .... .. .... ..... . ... .... .... .... ..... .... .. . ..... . .... . ..... .... ... . ..... .... .. ..... . . ..... .... ... . ... . . .... .. . ..... .. . .... ..... ... . . .... . ..... | ... ..... .... ..... . .. ... . .. .... . ... .. .... ... ... .. . .... .. . . .... ... .... .... .... .. .... ..... . ... .... .... .... ..... .... .. . ..... . .... . ..... .... ... . ..... .... .. ..... . . ..... .... ... . ... . . .... .. . ..... .. . .... ..... ... . . .... . ..... | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS ATBASH ENCODES BY REVERSING THE ALPHABET | tap_code | tap_code | null | {} | hard | en | 127 | 127 | 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. |
nomenclator-v3-0235 | 60 03 15 13 16 01 19 19 16 15 09 14 20 19 20 18 21 05 | 60 03 15 13 16 01 19 19 16 15 09 14 20 19 20 18 21 05 | THE COMPASS POINTS TRUE | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 36 | 53 | cipher_museum | 2.0 | public | null | null |
cda-0019862 | 3.4.10 4.6.7 1.5.6 8.4.1 11.2.3 4.4.4 11.3.4 6.1.1 13.4.5 8.5.10 10.1.2 19.3.1 13.3.2 20.6.10 8.3.5 6.6.8 4.1.1 20.3.6 3.6.6 14.2.4 16.1.8 10.3.5 12.1.3 7.6.2 4.3.6 10.4.6 14.2.6 3.5.6 16.4.9 18.4.2 2.1.1 3.4.5 19.3.2 2.4.4 4.4.4 15.1.6 8.6.4 9.4.9 16.5.7 2.2.10 10.2.7 3.3.2 1.1.10 4.3.10 12.6.2 8.6.10 3.3.5 12.6.5 17.... | 3.4.10 4.6.7 1.5.6 8.4.1 11.2.3 4.4.4 11.3.4 6.1.1 13.4.5 8.5.10 10.1.2 19.3.1 13.3.2 20.6.10 8.3.5 6.6.8 4.1.1 20.3.6 3.6.6 14.2.4 16.1.8 10.3.5 12.1.3 7.6.2 4.3.6 10.4.6 14.2.6 3.5.6 16.4.9 18.4.2 2.1.1 3.4.5 19.3.2 2.4.4 4.4.4 15.1.6 8.6.4 9.4.9 16.5.7 2.2.10 10.2.7 3.3.2 1.1.10 4.3.10 12.6.2 8.6.10 3.3.5 12.6.5 17.... | TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER | arnold_andre | arnold_andre | null | {} | hard | en | 144 | 144 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Arnold-André book cipher: coordinates (page.section.word) referencing a shared text. |
bifid-v2-0667 | RETAOLATVOIUBVDNNEORKULOFGDREULBOONORIPLHRKADGHUKPHATGDEWETHATIREPDGFCITFCETHAM | RETAOLATVOIUBVDNNEORKULOFGDREULBOONORIPLHRKADGHUKPHATGDEWETHATIREPDGFCITFCETHAM | THE PRICE OF LIBERTY IS ETERNAL VIGILANCE AND THE WILL TO DEFEND IT AGAINST ALL FOES AND THREATS | bifid | bifid | fractionation | {
"type": "keyword",
"value": "TRIUMPH"
} | advanced | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
cda-0014688 | 11 5 18 3 11 8 15 6 6 19 16 18 9 14 3 9 16 12 5 19 1 25 19 20 8 5 19 25 19 20 5 13 13 21 19 20 2 5 19 5 3 21 18 5 5 22 5 14 9 6 5 14 5 13 25 11 14 15 23 19 1 12 7 15 18 9 20 8 13 1 20 18 1 14 19 16 1 18 5 14 20 20 15 15 12 19 8 15 21 12 4 19 8 15 23 9 20 19 18 5 1 19 15 14 9 14 7 | 11 5 18 3 11 8 15 6 6 19 16 18 9 14 3 9 16 12 5 19 1 25 19 20 8 5 19 25 19 20 5 13 13 21 19 20 2 5 19 5 3 21 18 5 5 22 5 14 9 6 5 14 5 13 25 11 14 15 23 19 1 12 7 15 18 9 20 8 13 1 20 18 1 14 19 16 1 18 5 14 20 20 15 15 12 19 8 15 21 12 4 19 8 15 23 9 20 19 18 5 1 19 15 14 9 14 7 | KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM A TRANSPARENT TOOL SHOULD SHOW ITS REASONING | aeneas_tacticus | aeneas_tacticus | null | {} | hard | en | 107 | 107 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
cda-0004560 | USAQUIYWWT DANKQNDES TMZT CIS TZTCSJ JRTC PS TSQRAS SOSK NW SKSJZ UKYVT MEXYANCIJ | USAQUIYWWT DANKQNDES TMZT CIS TZTCSJ JRTC PS TSQRAS SOSK NW SKSJZ UKYVT MEXYANCIJ | KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM | monoalphabetic | monoalphabetic | null | {
"alphabet": "MPQFSWXINHUEJKYDGATCROVLZB"
} | medium | en | 69 | 69 | synthetic_educational | null | null | [
"frequency_analysis",
"pattern_words",
"hill_climbing_lm"
] | Monoalphabetic substitution with an arbitrary 26-letter permutation. |
m209-v2-0485 | XPJJJCQOZERALZKBRFBCNJBYPOJLYDKXAKMEPPIXYMYOMKUPQLWUMAPRJXRZQKERZGRCNVRPZPQBAXHXZTRUWDBNKEDRBCAYUADJYALPMXYPLRQQLVKVOOKWGJCSTRARFLZBNYEJAAYOKCR | XPJJJCQOZERALZKBRFBCNJBYPOJLYDKXAKMEPPIXYMYOMKUPQLWUMAPRJXRZQKERZGRCNVRPZPQBAXHXZTRUWDBNKEDRBCAYUADJYALPMXYPLRQQLVKVOOKWGJCSTRARFLZBNYEJAAYOKCR | FOURSCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH ON THIS CONTINENT A NEW NATION CONCEIVED IN LIBERTY AND DEDICATED TO THE PROPOSITION THAT ALL MEN ARE CREATED EQUAL | m209 | m209 | machine | {
"type": "seed",
"value": "VICTORY"
} | expert | en | 143 | 143 | cipher_museum | 2.0 | public | null | null |
cda-0013604 | XNLBDIWKRSTZUIUPXWWBGIFHHSLCPLQTWXQTNZHESXTCFKBFPULCQUHMQXLCBMXZYEUYBWCFNLERRMFSCXDYVVQSAQEZUAETAFYADYWNAMQZISDPMIAORSOQTESVBTFKNCCMFPLQHPAWKRVERMNZMTJFIFSXYKQQRBNUM | XNLBDIWKRSTZUIUPXWWBGIFHHSLCPLQTWXQTNZHESXTCFKBFPULCQUHMQXLCBMXZYEUYBWCFNLERRMFSCXDYVVQSAQEZUAETAFYADYWNAMQZISDPMIAORSOQTESVBTFKNCCMFPLQHPAWKRVERMNZMTJFIFSXYKQQRBNUM | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS | one_time_pad | one_time_pad | null | {} | hard | en | 165 | 165 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
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