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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
kama-sutra-v3-0385 | QFNXXNV RAN MJN TNNG LUA MJNI XJRFF YEJNAYM MJN NRAMJ REV MJN CNRPNTRGNAX XJRFF QN PRFFNV XUEX | QFNXXNV RAN MJN TNNG LUA MJNI XJRFF YEJNAYM MJN NRAMJ REV MJN CNRPNTRGNAX XJRFF QN PRFFNV XUEX | BLESSED ARE THE MEEK FOR THEY SHALL INHERIT THE EARTH AND THE PEACEMAKERS SHALL BE CALLED SONS | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 78 | 94 | cipher_museum | 2.0 | public | null | null |
vernam-033 | QTGYYBNHZFZIGPXPJWQAHOLHXGXBMTSEITZX | QTGYYBNHZFZIGPXPJWQAHOLHXGXBMTSEITZX | THE ONLY THING WE HAVE TO FEAR IS FEAR ITSELF | vernam | vernam | stream | {
"type": "pad",
"value": "XMCKLQPOS (repeating)"
} | expert | en | 36 | 36 | cipher_museum | 0.2 | public | null | null |
geheimschreiber-v3-0341 | VUIXPPZCTPUHLOYCMBIS | VUIXPPZCTPUHLOYCMBIS | THE REDCOATS ARE COMING | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "TEUTON"
} | expert | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
cda-0009913 | GURZ RFFN TRJN FUVQ QRAO HGAB GFRP HER | GURZ RFFN TRJN FUVQ QRAO HGAB GFRP HER | THE MESSAGE WAS HIDDEN BUT NOT SECURE | rot13 | rot13 | null | {
"shift": 13
} | medium | en | 31 | 31 | synthetic_educational | null | null | [] | |
vigenere-v3-0519 | ZZLRWNPWROSQPRNCVBEIOQSGKVJGDNQVSKDHUGLKQVSYEXANFYITSOHWOXSGKVSKQBQUWUFYGNAXOYVFCUWAHUTNSGHIMIFLSKATOYBJIYOAGJPKBGKZSIOEHVRGHGKVSOUADCSOBGHCLOURQTEYSEYZCKPHLCDOBTDDEXWPDECURREIEGYVQX | ZZLRWNPWROSQPRNCVBEIOQSGKVJGDNQVSKDHUGLKQVSYEXANFYITSOHWOXSGKVSKQBQUWUFYGNAXOYVFCUWAHUTNSGHIMIFLSKATOYBJIYOAGJPKBGKZSIOEHVRGHGKVSOUADCSOBGHCLOURQTEYSEYZCKPHLCDOBTDDEXWPDECURREIEGYVQX | 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 | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "DRAGON"
} | intermediate | en | 182 | 182 | cipher_museum | 2.0 | public | null | null |
kryptos-v2-0244 | XXDKXSNSGPYGKFYLBSUJSOBTXQMPUGXSYJHHUBVOIJYITTTMGSKAQZKSUUTQESLUHFYXTAUUTHXTFUUTLOKPREAMWVZOFBSUZGSBXDDYCDQHQTVCMMYQBYGRJTTULLDFHHWXCFXZ | XXDKXSNSGPYGKFYLBSUJSOBTXQMPUGXSYJHHUBVOIJYITTTMGSKAQZKSUUTQESLUHFYXTAUUTHXTFUUTLOKPREAMWVZOFBSUZGSBXDDYCDQHQTVCMMYQBYGRJTTULLDFHHWXCFXZ | ALL GAUL IS DIVIDED INTO THREE PARTS ONE OF WHICH THE BELGAE INHABIT THE AQUITANI ANOTHER AND THE THIRD THOSE WHO IN THEIR OWN LANGUAGE ARE CALLED CELTS IN OURS GAULS | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "LANGLEY"
} | advanced | en | 136 | 136 | cipher_museum | 2.0 | public | null | null |
m209-v3-0386 | ZPJNIQQMWANLDLHRKHRITYUEIYKVZRAQKOLRIPIKYXLULKUZXQSZAPMKRBQYDSTNZRWWYPSK | ZPJNIQQMWANLDLHRKHRITYUEIYKVZRAQKOLRIPIKYXLULKUZXQSZAPMKRBQYDSTNZRWWYPSK | DO UNTO OTHERS AS YOU WOULD HAVE THEM DO UNTO YOU THIS IS THE GOLDEN RULE OF ALL RELIGIONS | m209 | m209 | machine | {
"type": "seed",
"value": "VICTORY"
} | expert | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
cda-0019122 | BRIEF RIGHT UNITE TRACK ENEMY FRONT ORDER RAIDS CAUSE ENEMY WHERE OUTER RADIO KNOWN SEEKS OPENS NOTES LARGE YEARS WHERE HOURS EXACT NORTH TROOP HOLDS | BRIEF RIGHT UNITE TRACK ENEMY FRONT ORDER RAIDS CAUSE ENEMY WHERE OUTER RADIO KNOWN SEEKS OPENS NOTES LARGE YEARS WHERE HOURS EXACT NORTH TROOP HOLDS | BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER | 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. |
kryptos-106 | IFFJXFEFLEVLWKHHZGLETGXYWBRFMEAUYJXEAJRLLEPQNAQIQNCKXNABZ | IFFJXFEFLEVLWKHHZGLETGXYWBRFMEAUYJXEAJRLLEPQNAQIQNCKXNABZ | FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "PALIMPSEST"
} | advanced | en | 57 | 57 | cipher_museum | 0.2 | public | null | null |
cda-0016514 | DARA LDAI NYCH OLDA IINY PCHO LCHO RQOK EDYS HORS HALC HEDA LQOK EDYS HARA LQOK ALYK CHEO LYTA IINQ OKEE DYDA INYO KSHY CHOL CHED YSHA RALQ OKAL SHOR SHAR ALOT OLOT AINR AIIN QOKA LOXE DCHO LDAI INRC HEOL OTOL LKAI INOK EDYC HEDA LQOK ALDA INYS HAII NYTE DYLK AIIN YTED YSHE OLOT OLOT OLKA IIIN OTAI INDA INYO TAIN DAII ... | DARA LDAI NYCH OLDA IINY PCHO LCHO RQOK EDYS HORS HALC HEDA LQOK EDYS HARA LQOK ALYK CHEO LYTA IINQ OKEE DYDA INYO KSHY CHOL CHED YSHA RALQ OKAL SHOR SHAR ALOT OLOT AINR AIIN QOKA LOXE DCHO LDAI INRC HEOL OTOL LKAI INOK EDYC HEDA LQOK ALDA INYS HAII NYTE DYLK AIIN YTED YSHE OLOT OLOT OLKA IIIN OTAI INDA INYO TAIN DAII ... | OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION FAIL CLOSED IS A POSTURE NOT A SLOGAN POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | voynich_render | voynich_render | null | {} | hard | en | 270 | 270 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
cda-0021084 | - .... . / .-. .- .. .-.. / ..-. . -. -.-. . / -.-. .. .--. .... . .-. / .-- .-. .. - . ... / - . -..- - / .. -. / .- / --.. .. --. --.. .- --. / .--. .- - - . .-. -. / - .... . / - .-. .. - .... . -- .. ..- ... / -.-. .. .--. .... . .-. / .- -.. ...- .- -. -.-. . ... / - .... . / .- .-.. .--. .... .- -... . - / -... -... | - .... . / .-. .- .. .-.. / ..-. . -. -.-. . / -.-. .. .--. .... . .-. / .-- .-. .. - . ... / - . -..- - / .. -. / .- / --.. .. --. --.. .- --. / .--. .- - - . .-. -. / - .... . / - .-. .. - .... . -- .. ..- ... / -.-. .. .--. .... . .-. / .- -.. ...- .- -. -.-. . ... / - .... . / .- .-.. .--. .... .- -... . - / -... -... | THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS | morse_code | morse_code | null | {} | hard | en | 151 | 151 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
chaocipher-v3-0259 | ABNIJLHZCKJOPXNNAIOMXTLSMGFYOCVSBCOPLGTDOXDGXGBDLVVQMKYWGIWURNAUTMJYYEMU | ABNIJLHZCKJOPXNNAIOMXTLSMGFYOCVSBCOPLGTDOXDGXGBDLVVQMKYWGIWURNAUTMJYYEMU | TWO ROADS DIVERGED IN A YELLOW WOOD AND SORRY I COULD NOT TRAVEL BOTH AND BE ONE TRAVELER | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
solitaire-023 | LBKCZFDAOTVMA | LBKCZFDAOTVMA | THE KING IS DEAD | solitaire | solitaire | stream | {
"type": "none",
"value": null
} | expert | en | 13 | 13 | cipher_museum | 0.2 | public | null | null |
venona-pad-reuse-178 | EDGCDXDXFVVXXKTV4XWER7VQDMP3KCEDCCW5WRGA4XRKB7EYZXMCDXUPMA45XCMSB5DXFVATDXFZWAVAJ7VQAEPSXUWBW2P6WWQCDXDAMUXUWSMAPQSJBCDXKXFRXQEAJ2XUWVGZJ | EDGCDXDXFVVXXKTV4XWER7VQDMP3KCEDCCW5WRGA4XRKB7EYZXMCDXUPMA45XCMSB5DXFVATDXFZWAVAJ7VQAEPSXUWBW2P6WWQCDXDAMUXUWSMAPQSJBCDXKXFRXQEAJ2XUWVGZJ | WHETHER THEREFORE YE EAT OR DRINK OR WHATSOEVER YE DO DO ALL TO THE GLORY OF GOD FOR THE EARTH IS THE LORDS AND THE FULLNESS THEREOF THE WORLD AND THEY THAT DWELL THEREIN | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "SECRET"
} | expert | en | 137 | 137 | cipher_museum | 0.2 | public | null | null |
aeneas-tacticus-008 | 8 15 12 4 16 15 19 9 20 9 15 14 | 8 15 12 4 16 15 19 9 20 9 15 14 | HOLD POSITION | aeneas_tacticus | aeneas_tacticus | steganography | {
"type": "none",
"value": null
} | expert | en | 20 | 31 | cipher_museum | 0.2 | public | null | null |
kryptos-v2-0132 | UUTJXLBSGAXBU | UUTJXLBSGAXBU | THE PASS IS HELD | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "LANGLEY"
} | advanced | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
cda-0001967 | ATVUS SMJTJ SXZRS SIJLK IICBT HDFPF IFYJG CKWQV GPHFV NMZZY WRPBT WESYA WNXND LDICV KLUBA PNTBM KFMSL YIBDC GPHJH VVXMZ NSCRC BTHJZ RKMBS RZ | ATVUS SMJTJ SXZRS SIJLK IICBT HDFPF IFYJG CKWQV GPHFV NMZZY WRPBT WESYA WNXND LDICV KLUBA PNTBM KFMSL YIBDC GPHJH VVXMZ NSCRC BTHJZ RKMBS RZ | A STRONG CLAIM NEEDS STRONG EVIDENCE A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN | trithemius | trithemius | null | {} | hard | en | 117 | 117 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
cda-0007270 | CHNNWN WASEOFGEHQGHER QSFREIRF QOERSHY QSFVUA OA OSTWAS NVCVRE OCCYVSF O NWASOE THAQGVBA GB ROQV YSGGSE SERDHSAQL OAOYLFVF QOA ERISOY JROX NWCUSEF GUR NWPEOEL CESFREIRF XABJYSQTS TBE GUS QBZZHAWGL | CHNNWN WASEOFGEHQGHER QSFREIRF QOERSHY QSFVUA OA OSTWAS NVCVRE OCCYVSF O NWASOE THAQGVBA GB ROQV YSGGSE SERDHSAQL OAOYLFVF QOA ERISOY JROX NWCUSEF GUR NWPEOEL CESFREIRF XABJYSQTS TBE GUS QBZZHAWGL | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | porta | porta | null | {
"key": "SECURE"
} | hard | en | 169 | 169 | synthetic_educational | null | null | [] | |
kryha-068 | IUUHTXYXUNMM | IUUHTXYXUNMM | HOLD POSITION | kryha | kryha | machine | {
"type": "keyword",
"value": "CIPHER"
} | expert | en | 12 | 12 | cipher_museum | 0.2 | public | null | null |
cda-0020559 | .... .... .. ... . ..... . .. . ..... .... ... .... .... ... . . ..... .... ... .... ... ... .... ... ... .... ... .... ... .. ... ... .... ..... .. ..... .. .. ... . ..... .... .. . ..... .... .... .. ... . ..... ... .. . ..... .... .... .. ... ... .... . .... .. . . . .. .... ... . ... | .... .... .. ... . ..... . .. . ..... .... ... .... .... ... . . ..... .... ... .... ... ... .... ... ... .... ... .... ... .. ... ... .... ..... .. ..... .. .. ... . ..... .... .. . ..... .... .... .. ... . ..... ... .. . ..... .... .... .. ... ... .... . .... .. . . . .. .... ... . ... | THE BEST LESSONS SHOW WHERE THE METHOD FAILS THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT | tap_code | tap_code | null | {} | hard | en | 91 | 91 | 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. |
vigenere-vf-0051 | IBSXMAQPWVSQPIVSCFTYSVNUXSSWNAFBWPIDPUFHHAFOFXIYQHXSLTUMYPIDKCKKLQMN | IBSXMAQPWVSQPIVSCFTYSVNUXSSWNAFBWPIDPUFHHAFOFXIYQHXSLTUMYPIDKCKKLQMN | WHATSOEVER YE DO DO IT HEARTILY AS TO THE LORD AND NOT UNTO MEN FOR HIS GLORY IS GREAT | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
stager-route-v3-0390 | TLOOOCBLEURELHEOXMTTICOMACWDESHTEFXXAEIAAADGNOTCXXEINGEDRNEWNIXXNGIITOPSNTFPXXUAHFTA | TLOOOCBLEURELHEOXMTTICOMACWDESHTEFXXAEIAAADGNOTCXXEINGEDRNEWNIXXNGIITOPSNTFPXXUAHFTA | THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC | stager_route | stager_route | transposition | {
"type": "integer",
"value": 12
} | expert | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v3-0400 | VYLLYN REV JNFFTRE YEDNEMNV COQFYP GNI PAICMUKARCJI YE EYENMNNE XNDNEMI XYS PJREKYEK NDNAIMJYEK | VYLLYN REV JNFFTRE YEDNEMNV COQFYP GNI PAICMUKARCJI YE EYENMNNE XNDNEMI XYS PJREKYEK NDNAIMJYEK | DIFFIE AND HELLMAN INVENTED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX CHANGING EVERYTHING | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 83 | 95 | cipher_museum | 2.0 | public | null | null |
cda-0015511 | THAN-ZIE / LIN / DZEH / NA-AS-TSO-SI / DZEH / DIBEH / DIBEH / WOL-LA-CHEE / AH-JAH / DZEH / GLOE-IH / WOL-LA-CHEE / DIBEH / LIN / TKIN / BE / BE / DZEH / TSAH / SHUSH / NO-DA-IH / THAN-ZIE / TSAH / A-KHA / THAN-ZIE / DIB... | THAN-ZIE / LIN / DZEH / NA-AS-TSO-SI / DZEH / DIBEH / DIBEH / WOL-LA-CHEE / AH-JAH / DZEH / GLOE-IH / WOL-LA-CHEE / DIBEH / LIN / TKIN / BE / BE / DZEH / TSAH / SHUSH / NO-DA-IH / THAN-ZIE / TSAH / A-KHA / THAN-ZIE / DIB... | THE MESSAGE WAS HIDDEN BUT NOT SECURE | navajo_code | navajo_code | null | {} | hard | en | 154 | 154 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
wallis-cipher-v2-0115 | 90 86 56 24 55 54 63 82 81 46 91 90 21 56 37 54 76 59 56 53 91 90 43 54 26 56 34 10 61 91 90 85 33 34 54 55 56 54 85 91 90 31 42 63 10 86 91 90 89 34 56 91 90 87 91 90 82 81 55 54 91 90 45 23 28 48 61 91 90 13 33 60 52 91 90 60 28 79 56 91 90 33 85 91 90 28 34 72 87 40 46 91 90 10 23 54 91 90 49 85 33 55 56 21 91 90 24... | 90 86 56 24 55 54 63 82 81 46 91 90 21 56 37 54 76 59 56 53 91 90 43 54 26 56 34 10 61 91 90 85 33 34 54 55 56 54 85 91 90 31 42 63 10 86 91 90 89 34 56 91 90 87 91 90 82 81 55 54 91 90 45 23 28 48 61 91 90 13 33 60 52 91 90 60 28 79 56 91 90 33 85 91 90 28 34 72 87 40 46 91 90 10 23 54 91 90 49 85 33 55 56 21 91 90 24... | YESTERDAY DECEMBER SEVENTH NINETEEN FORTY ONE A DATE WHICH WILL LIVE IN INFAMY THE UNITED STATES OF AMERICA WAS SUDDENLY AND DELIBERATELY ATTACKED BY NAVAL AND AIR FORCES OF THE EMPIRE OF JAPAN | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "OXFORD"
} | expert | en | 454 | 680 | cipher_museum | 2.0 | public | null | null |
kryptos-v3-0405 | PMAGVEWQMZNCYHDUZFDCTFMDQJWBJMFFCIKDHDZWFFGBTLSFKDMPNZVKWEAICOALCKCJFFJFJNICUDUTWSDQLHWGSXBDUYNSOKUKHRFMBLKKJVFQUQAFEOAGEKKDQSDUTHJBQLXBQJMBHMQFABFJEANBVQFYBFDGAGDVWXFZF | PMAGVEWQMZNCYHDUZFDCTFMDQJWBJMFFCIKDHDZWFFGBTLSFKDMPNZVKWEAICOALCKCJFFJFJNICUDUTWSDQLHWGSXBDUYNSOKUKHRFMBLKKJVFQUQAFEOAGEKKDQSDUTHJBQLXBQJMBHMQFABFJEANBVQFYBFDGAGDVWXFZF | WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL THAT THEY ARE ENDOWED BY THEIR CREATOR WITH CERTAIN UNALIENABLE RIGHTS THAT AMONG THESE ARE LIFE LIBERTY AND THE PURSUIT OF HAPPINESS | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "SANBORN"
} | advanced | en | 169 | 169 | cipher_museum | 2.0 | public | null | null |
diana-v3-0354 | IUIBRBRIUI | IUIBRBRIUI | DOT DASH DOT | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 10 | 10 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-069 | UNZPZGMQZTYJWAGWRRNFR | UNZPZGMQZTYJWAGWRRNFR | SUPPLY LINE COMPROMISED | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 21 | 21 | cipher_museum | 0.2 | public | null | null |
morse-code-v3-0083 | - .... . / .-. .. --. .... - / --- ..-. / - .... . / .--. . --- .--. .-.. . / - --- / -.- . . .--. / .- -. -.. / -... . .- .-. / .- .-. -- ... / ... .... .- .-.. .-.. / -. --- - / -... . / .. -. ..-. .-. .. -. --. . -.. / -... -.-- / - .... . / ..-. . -.. . .-. .- .-.. / --. --- ...- . .-. -. -- . -. - | - .... . / .-. .. --. .... - / --- ..-. / - .... . / .--. . --- .--. .-.. . / - --- / -.- . . .--. / .- -. -.. / -... . .- .-. / .- .-. -- ... / ... .... .- .-.. .-.. / -. --- - / -... . / .. -. ..-. .-. .. -. --. . -.. / -... -.-- / - .... . / ..-. . -.. . .-. .- .-.. / --. --- ...- . .-. -. -- . -. - | THE RIGHT OF THE PEOPLE TO KEEP AND BEAR ARMS SHALL NOT BE INFRINGED BY THE FEDERAL GOVERNMENT | morse_code | morse_code | encoding | {
"type": "none",
"value": null
} | beginner | en | 210 | 303 | cipher_museum | 2.0 | public | null | null |
book-cipher-v3-0005 | 53.1 7.1 10.1 15.1 7.1 53.1 95.1 10.1 3.1 5.1 4.1 24.1 7.1 35.1 24.1 53.1 | 53.1 7.1 10.1 15.1 7.1 53.1 95.1 10.1 3.1 5.1 4.1 24.1 7.1 35.1 24.1 53.1 | RENDER UNTO CAESAR | book_cipher | book_cipher | codebook | {
"type": "none",
"value": null
} | expert | en | 58 | 73 | cipher_museum | 2.0 | public | null | null |
cda-0012709 | HENC EINC URLA RGEL ARGE CLEA RISS UEPO INTH EAVY ENEM YRIG HTUP PERS COUT EARL YSEE KSLO WERI NNER NAVA LENE MYAF TERR OADS ARRA YLEA DSGA INSE ARLY BASI S | HENC EINC URLA RGEL ARGE CLEA RISS UEPO INTH EAVY ENEM YRIG HTUP PERS COUT EARL YSEE KSLO WERI NNER NAVA LENE MYAF TERR OADS ARRA YLEA DSGA INSE ARLY BASI S | HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS | 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. |
scytale-v3-0184 | HMGROCHELUAEINOUSDMNNNPNMIXIICGETANXNNERRANTXTTGESCSHXOEALOTOEXRLTINAUFXHLHEANRIXUIESLDCEX | HMGROCHELUAEINOUSDMNNNPNMIXIICGETANXNNERRANTXTTGESCSHXOEALOTOEXRLTINAUFXHLHEANRIXUIESLDCEX | HUMINT OR HUMAN INTELLIGENCE GATHERING RELIES ON PERSONAL CONTACT AND HUMAN SOURCES IN THE FIELD | scytale | scytale | transposition | {
"type": "integer",
"value": 9
} | intermediate | en | 90 | 90 | cipher_museum | 2.0 | public | null | null |
playfair-es-044 | EOFKRTZUBIZFDOBQCIPCBVABQUABUPBDFC | EOFKRTZUBIZFDOBQCIPCBVABQUABUPBDFC | CUANDO UNA PUERTA SE CIERRA OTRA SE ABRE | playfair | playfair | substitution | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | es | 34 | 34 | cipher_museum | 0.2 | public | null | null |
diana-293 | TJPXSILFGCLWBZVCTTQTCZTTAGEGRWRVDGBPEAFNFWMUIPUUQKIPCVQWELIJ | TJPXSILFGCLWBZVCTTQTCZTTAGEGRWRVDGBPEAFNFWMUIPUUQKIPCVQWELIJ | LET JUSTICE BE DONE THOUGH THE HEAVENS FALL AND THE STARS GO DARK FOREVER | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "ENIGMA"
} | intermediate | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
kryptos-v3-0061 | GMEXJOGMERJYMSVQYTBUZUSFIUKQQNLVFYGBAQLUERANCUICECBKFKGAMJJSGIBZJXFPKYQJRMMJ | GMEXJOGMERJYMSVQYTBUZUSFIUKQQNLVFYGBAQLUERANCUICECBKFKGAMJJSGIBZJXFPKYQJRMMJ | AT THE BATTLE OF MIDWAY AMERICAN DIVE BOMBERS DESTROYED FOUR JAPANESE CARRIERS IN MINUTES | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "SHADOW"
} | advanced | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
cda-0016387 | 66 36 82 68 59 66 69 55 82 43 52 50 65 36 82 80 82 73 66 82 29 11 61 66 36 82 55 82 43 89 50 66 36 66 36 82 65 57 68 50 29 66 82 73 66 50 66 61 82 57 76 20 82 68 59 76 69 80 66 50 61 66 36 82 80 82 52 50 65 80 69 52 68 57 69 76 95 50 25 82 29 82 80 82 68 29 11 11 82 52 80 43 65 66 61 50 66 61 82 57 76 | 66 36 82 68 59 66 69 55 82 43 52 50 65 36 82 80 82 73 66 82 29 11 61 66 36 82 55 82 43 89 50 66 36 66 36 82 65 57 68 50 29 66 82 73 66 50 66 61 82 57 76 20 82 68 59 76 69 80 66 50 61 66 36 82 80 82 52 50 65 80 69 52 68 57 69 76 95 50 25 82 29 82 80 82 68 29 11 11 82 52 80 43 65 66 61 50 66 61 82 57 76 | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF | wallis_cipher | wallis_cipher | null | {} | hard | en | 101 | 101 | synthetic_educational | null | null | [
"number_substitution_decode",
"frequency_analysis"
] | Wallis cipher: each letter mapped to a unique two-digit number from a fixed table. |
alberti-disk-v2-0343 | ZSGATUATYPJHYGXBKISTRARTWPWPQELOWQPZROVFDXLDMGAOEXOLBSGOYMFIHIPOSZMRBNPGQHGHJJSO | ZSGATUATYPJHYGXBKISTRARTWPWPQELOWQPZROVFDXLDMGAOEXOLBSGOYMFIHIPOSZMRBNPGQHGHJJSO | THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 8
} | expert | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
cda-0016639 | ABQAETLIWEDEYFYLWINDKAUVHEPGQSPSRVDWFCMRXJXZXWDUZDEVTRRDVNMPCEXNREHHNPUAUFASPLIGHFSIME | ABQAETLIWEDEYFYLWINDKAUVHEPGQSPSRVDWFCMRXJXZXWDUZDEVTRRDVNMPCEXNREHHNPUAUFASPLIGHFSIME | THE ARCHITECTURE SHOULD MAKE MISUSE HARDER PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH NEVER | running_key | running_key | null | {} | hard | en | 86 | 86 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
cda-0011330 | GUR ENVY SRAPR PVCURE JEVGRF GRKG VA N MVTMNT CNGGREA | GUR ENVY SRAPR PVCURE JEVGRF GRKG VA N MVTMNT CNGGREA | THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN | rot13 | rot13 | null | {
"shift": 13
} | medium | en | 44 | 44 | synthetic_educational | null | null | [] | |
tap-code-v3-0001 | . ... .... .. ... .... .... ... .... ... .... .... .. ... . ..... .... .. .... ..... . .. .. .... . ... ... .... ... ... ... ... ... .... ..... .. | . ... .... .. ... .... .... ... .... ... .... .... .. ... . ..... .... .. .... ..... . .. .. .... . ... ... .... ... ... ... ... ... .... ..... .. | CROSS THE RUBICON NOW | tap_code | tap_code | substitution | {
"type": "none",
"value": null
} | beginner | en | 111 | 180 | cipher_museum | 2.0 | public | null | null |
cda-0012072 | 0386 06333 00659 00362 05977 2538 01597 4421 1026 4757 01348 1576 05998 00714 7866 5675 01571 06949 1602 5715 06004 2921 04450 2212 06377 02541 1603 00326 03835 05059 2552 0370 0677 01659 6334 | 0386 06333 00659 00362 05977 2538 01597 4421 1026 4757 01348 1576 05998 00714 7866 5675 01571 06949 1602 5715 06004 2921 04450 2212 06377 02541 1603 00326 03835 05059 2552 0370 0677 01659 6334 | ATBASH ENCODES BY REVERSING THE ALPHABET | zimmermann | zimmermann | null | {} | medium | en | 35 | 35 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
cda-0017778 | ABBBA ABBAB ABABA BABBA AAAAB ABAAA BAABB BAAAB AABAA ABBAA AAABA ABBAB AAABB AABAA AAABB ABABA AABAA BAABA BAABA AABAA BAAAA BAAAB AAAAA BAAAB ABBBA AAAAA ABAAA BAAAA BAAAB ABBAB AABAB ABBAA BAABB ABABB AAAAB AABAA BAAAA BAAAB AABAB BAAAA ABBAB ABABB ABBAB ABBAA AABAA BAABA ABBAB AABAB ABAAA BAABB AABAA BAABA AABBB AA... | ABBBA ABBAB ABABA BABBA AAAAB ABAAA BAABB BAAAB AABAA ABBAA AAABA ABBAB AAABB AABAA AAABB ABABA AABAA BAABA BAABA AABAA BAAAA BAAAB AAAAA BAAAB ABBBA AAAAA ABAAA BAAAA BAAAB ABBAB AABAB ABBAA BAABB ABABB AAAAB AABAA BAAAA BAAAB AABAB BAAAA ABBAB ABABB ABBAB ABBAA AABAA BAABA ABBAB AABAB ABAAA BAABB AABAA BAABA AABBB AA... | POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER | bacon_cipher | bacon_cipher | null | {} | hard | en | 815 | 815 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
vic-040 | 382084566485838491219184827825808482051813820845661829382900929090821818290 | 382084566485838491219184827825808482051813820845661829382900929090821818290 | WE SHALL FIGHT ON THE BEACHES AND WE SHALL NEVER SURRENDER | vic | vic | substitution | {
"type": "keyword",
"value": "SNOWFALL"
} | advanced | en | 75 | 75 | cipher_museum | 0.2 | public | null | null |
vic-v3-0013 | 91080649091280839090928989192867807 | 91080649091280839090928989192867807 | THE CASTLE IS SURROUNDED | vic | vic | substitution | {
"type": "keyword",
"value": "HOLLOW"
} | advanced | en | 35 | 35 | cipher_museum | 2.0 | public | null | null |
bazeries-v2-0861 | TAPOTLTGBUPHFFBFIAPBNIJMPBMHIBPHQLFBHBTLIYGTVPHTLSMRBLLYTPGITTAPMSHLTGIVHSGIJNAPMTLT | TAPOTLTGBUPHFFBFIAPBNIJMPBMHIBPHQLFBHBTLIYGTVPHTLSMRBLLYTPGITTAPMSHLTGIVHSGIJNAPMTLT | THE REGIMENT WILL HOLD ITS POSITION UNTIL REINFORCEMENTS ARRIVE FROM THE EASTERN COMMAND POST HERE | bazeries | bazeries | transposition | {
"type": "integer",
"value": 71
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
venona-pad-reuse-v2-0190 | YZVWC3VYPFP7C35ASDRYTYPJJVU4LZSE4QTPIMJ7AMG3PXW3VPGXJF63PZTXR63DFHM4TTA6B4D | YZVWC3VYPFP7C35ASDRYTYPJJVU4LZSE4QTPIMJ7AMG3PXW3VPGXJF63PZTXR63DFHM4TTA6B4D | TRUST IN THE LORD WITH ALL THINE HEART AND LEAN NOT UNTO THINE OWN UNDERSTANDING IN ALL WAYS | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "LIBERTY"
} | expert | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-v2-0197 | WHKOGHVSPSGHCTHWASGWHKOGOBOUSCTKWGRCAOBROBOUSCTIHHSFTCCZWGVBSGG | WHKOGHVSPSGHCTHWASGWHKOGOBOUSCTKWGRCAOBROBOUSCTIHHSFTCCZWGVBSGG | IT WAS THE BEST OF TIMES IT WAS AN AGE OF WISDOM AND AN AGE OF UTTER FOOLISHNESS | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "JOSEON"
} | beginner | en | 63 | 63 | cipher_museum | 2.0 | public | null | null |
enigma-v3-0582 | HFQFINHWJHRQXKWLBVZRFFZNUILHXTHULGGAUUDHHGIILYCCNNOCHBVPAGZMJFIPQATCCDAGI | HFQFINHWJHRQXKWLBVZRFFZNUILHXTHULGGAUUDHHGIILYCCNNOCHBVPAGZMJFIPQATCCDAGI | THE BATTLE OF BRITAIN RAGED IN THE SKIES ABOVE ENGLAND FOR FOUR MONTHS IN NINETEEN FORTY | enigma | enigma | machine | {
"type": "rotor_start",
"value": "PQR"
} | expert | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
lorenz-v3-0458 | THEAQMYWILLCROSSTHEDELAWARERIVERTONIGHTATELEVFNOCLOCKTHEMENWILLCARRYONLYTHEIRWEAPONSANCTHREEDAYSOFRATIONSMARCHROUTESANDOBJECTIVFSWILLBEDISTRIBUTEDTOCOMMANDERSATTHECROSSJNG | THEAQMYWILLCROSSTHEDELAWARERIVERTONIGHTATELEVFNOCLOCKTHEMENWILLCARRYONLYTHEIRWEAPONSANCTHREEDAYSOFRATIONSMARCHROUTESANDOBJECTIVFSWILLBEDISTRIBUTEDTOCOMMANDERSATTHECROSSJNG | THE ARMY WILL CROSS THE DELAWARE RIVER TONIGHT AT ELEVEN OCLOCK THE MEN WILL CARRY ONLY THEIR WEAPONS AND THREE DAYS OF RATIONS MARCH ROUTES AND OBJECTIVES WILL BE DISTRIBUTED TO COMMANDERS AT THE CROSSING | lorenz | lorenz | machine | {
"type": "seed",
"value": "STURGEON"
} | expert | en | 171 | 171 | cipher_museum | 2.0 | public | null | null |
trifid-v3-0214 | EDHXBBMHYERLLDUM | EDHXBBMHYERLLDUM | THE GATES HOLD FIRM | trifid | trifid | fractionation | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
diana-v3-0415 | PAQTJTMGRTAOHYYMUQQCKBEIXNKYWIOAZPJRRMTNRQWBXNFTWEAOAQPTXRXLKPGHGNROXKUXYIRCYAQNCDLLHFIXNAUUWZNTEFLVBTTBQTIOBZEUYPUWZRYUEXNRAFEEJWLGYAQTRYPNAAVAERUTEKJJRUKOTTOLLFIPAALWLVZQOPXUEBUJGS | PAQTJTMGRTAOHYYMUQQCKBEIXNKYWIOAZPJRRMTNRQWBXNFTWEAOAQPTXRXLKPGHGNROXKUXYIRCYAQNCDLLHFIXNAUUWZNTEFLVBTTBQTIOBZEUYPUWZRYUEXNRAFEEJWLGYAQTRYPNAAVAERUTEKJJRUKOTTOLLFIPAALWLVZQOPXUEBUJGS | 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 | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 182 | 182 | cipher_museum | 2.0 | public | null | null |
one-time-pad-v3-0032 | TIGVLTZOMJBODBICTKZXQJNIB | TIGVLTZOMJBODBICTKZXQJNIB | THE SHOT HEARD ROUND THE WORLD | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "ABCDEFGH (repeating)"
} | expert | en | 25 | 25 | cipher_museum | 2.0 | public | null | null |
cda-0005734 | STTASXEAXIEOIIRRIIAMISRTTSNLKCFAASNHPRTPTLGDFESPCIITSTSEIEENNICYGMRTSELTDOOPESAAIAESNRFRKDFYRETSAORIRRAMNBHEDERXEIFTCOSSGYTSETAXCHGYSBDIDATNNETOETIEUEENMSMEITATURSNYSFEPOTPKAEDACDACEVXHMAIERLE | STTASXEAXIEOIIRRIIAMISRTTSNLKCFAASNHPRTPTLGDFESPCIITSTSEIEENNICYGMRTSELTDOOPESAAIAESNRFRKDFYRETSAORIRRAMNBHEDERXEIFTCOSSGYTSETAXCHGYSBDIDATNNETOETIEUEENMSMEITATURSNYSFEPOTPKAEDACDACEVXHMAIERLE | BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES | double_transposition | double_transposition | null | {
"key1": "MUSEUM",
"key2": "PALACE"
} | hard | en | 192 | 192 | synthetic_educational | null | null | [
"key_length_search",
"anagram_recovery"
] | Double columnar transposition: apply columnar twice for stronger security. |
alberti-disk-v2-0462 | KOMDLSHRIEKXKZWDFLDRYZOWIQIYOPEXGFUNZDNQWOIBTMVWJCSYURINGJSMXYWRKUQETZKXTAMIKLFHELL | KOMDLSHRIEKXKZWDFLDRYZOWIQIYOPEXGFUNZDNQWOIBTMVWJCSYURINGJSMXYWRKUQETZKXTAMIKLFHELL | KNOWLEDGE WITHOUT WISDOM IS A DANGEROUS THING AND WISDOM WITHOUT COURAGE IS ULTIMATELY WORTHLESS | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 10
} | expert | en | 83 | 83 | cipher_museum | 2.0 | public | null | null |
cda-0015569 | 06293 02580 01660 0346 06639 6309 4733 03478 01570 07902 01000 02858 5121 02611 01625 05710 1570 07557 06281 1652 04489 1303 5987 06295 2586 1616 3490 1570 7912 7281 2848 6282 02519 06356 2523 1626 5111 03822 0314 02886 4452 6331 1657 7536 06379 2861 06328 05992 1620 3780 01900 0973 4793 03836 6680 04159 04484 0394 572... | 06293 02580 01660 0346 06639 6309 4733 03478 01570 07902 01000 02858 5121 02611 01625 05710 1570 07557 06281 1652 04489 1303 5987 06295 2586 1616 3490 1570 7912 7281 2848 6282 02519 06356 2523 1626 5111 03822 0314 02886 4452 6331 1657 7536 06379 2861 06328 05992 1620 3780 01900 0973 4793 03836 6680 04159 04484 0394 572... | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH | zimmermann | zimmermann | null | {} | hard | en | 153 | 153 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
cda-0015660 | ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨a17⟩ ⟨w20⟩ ⟨a25⟩ ⟨w20⟩ ⟨w14⟩ ⟨a25⟩ ⟨w32⟩ ⟨a31⟩ ⟨w20⟩ ⟨w22⟩ ⟨a25⟩ ⟨w28⟩ ⟨a17⟩ ⟨w32⟩ ⟨w20⟩ ⟨w22⟩ ⟨a13⟩ ⟨w08⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨a07⟩ ⟨w22⟩ ⟨a11⟩ ⟨w20⟩ ⟨a23⟩ ⟨w10⟩ ⟨a19⟩ ⟨w20⟩ ⟨w04⟩ ⟨w08⟩ ⟨w38⟩ ⟨w32⟩ ⟨a07⟩ ⟨w26⟩ ⟨w14⟩ ⟨a01⟩ ⟨w08⟩ ⟨w32⟩ ⟨w04⟩ ⟨w22⟩ | ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨a17⟩ ⟨w20⟩ ⟨a25⟩ ⟨w20⟩ ⟨w14⟩ ⟨a25⟩ ⟨w32⟩ ⟨a31⟩ ⟨w20⟩ ⟨w22⟩ ⟨a25⟩ ⟨w28⟩ ⟨a17⟩ ⟨w32⟩ ⟨w20⟩ ⟨w22⟩ ⟨a13⟩ ⟨w08⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨a07⟩ ⟨w22⟩ ⟨a11⟩ ⟨w20⟩ ⟨a23⟩ ⟨w10⟩ ⟨a19⟩ ⟨w20⟩ ⟨w04⟩ ⟨w08⟩ ⟨w38⟩ ⟨w32⟩ ⟨a07⟩ ⟨w26⟩ ⟨w14⟩ ⟨a01⟩ ⟨w08⟩ ⟨w32⟩ ⟨w04⟩ ⟨w22⟩ | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS | babington | babington | null | {} | medium | en | 45 | 45 | synthetic_educational | null | null | [
"nomenclator_frequency",
"symbol_mapping"
] | Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot. |
cda-0018764 | Γ Γ· ¬· ┌· ⌐ ┐· r· ⌐ ─ Γ K ┌· Γ· ¬· ┌· ⌐ ┐· r· ⌐· ┌· L └· X· L ─ r Γ· L X L ⌣ ┐· ┘· X L X Γ· ┌ ┐· └ L r Γ· ┐· r· L ┌· X K r· L ¬ Γ· ⌐· Γ· Γ r Γ· ┐· r· L ┌· r ┘· ┌ ¬ Γ· ─ L X ⌐ ┐· ┘· └ ⌒· ¬ Γ· X· X X └· X· ⌐ ┌· L ⌒ Γ· K r· K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ | Γ Γ· ¬· ┌· ⌐ ┐· r· ⌐ ─ Γ K ┌· Γ· ¬· ┌· ⌐ ┐· r· ⌐· ┌· L └· X· L ─ r Γ· L X L ⌣ ┐· ┘· X L X Γ· ┌ ┐· └ L r Γ· ┐· r· L ┌· X K r· L ¬ Γ· ⌐· Γ· Γ r Γ· ┐· r· L ┌· r ┘· ┌ ¬ Γ· ─ L X ⌐ ┐· ┘· └ ⌒· ¬ Γ· X· X X └· X· ⌐ ┌· L ⌒ Γ· K r· K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ | DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION | pigpen | pigpen | null | {} | medium | en | 38 | 38 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
hill-v2-0602 | RWPKXWKZKMKCHGSRDQVYFLDQJKHUZBLBFVJXOSRTDQLVXZQHOADOVBLFGYKZGYXNUUPGMGUUPKKJUU | RWPKXWKZKMKCHGSRDQVYFLDQJKHUZBLBFVJXOSRTDQLVXZQHOADOVBLFGYKZGYXNUUPGMGUUPKKJUU | LA LIBERTE GUIDANT LE PEUPLE VERS UN AVENIR MEILLEUR ET PLUS JUSTE POUR TOUS LES HOMMES LIBRES | hill | hill | polygraphic | {
"a": 11,
"b": 3,
"c": 2,
"d": 5
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
vigenere-v2-0727 | OLHBQEIXCYNOIUMOUGQYDXYIHVWFOPYGDKVGAMUDHGXUYGUEKXKNUHLZZOYFWPVOLFFRJKALOFJSMXYHZHRK | OLHBQEIXCYNOIUMOUGQYDXYIHVWFOPYGDKVGAMUDHGXUYGUEKXKNUHLZZOYFWPVOLFFRJKALOFJSMXYHZHRK | VENONA REVEALED THAT NUMEROUS SOVIET AGENTS HAD PENETRATED THE HIGHEST LEVELS OF THE US GOVERNMENT | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "THUNDER"
} | intermediate | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
cda-0021937 | ZHGI LMTX OZRN MVVW HHGI LMTV ERWV MXVG SVZI XSRG VXGF IVHS LFOW NZPV NRHF HVSZ IWVI | ZHGI LMTX OZRN MVVW HHGI LMTV ERWV MXVG SVZI XSRG VXGF IVHS LFOW NZPV NRHF HVSZ IWVI | A STRONG CLAIM NEEDS STRONG EVIDENCE THE ARCHITECTURE SHOULD MAKE MISUSE HARDER | atbash | atbash | null | {} | medium | en | 68 | 68 | synthetic_educational | null | null | [
"self_inverse_check",
"frequency_analysis"
] | Atbash maps A↔Z, B↔Y, … and is its own inverse. |
cda-0018849 | ROETN XKMNS OMYLL WMXIA YCKSI SDNKX MFHYB WBIKR NDGSR VLNVM A | ROETN XKMNS OMYLL WMXIA YCKSI SDNKX MFHYB WBIKR NDGSR VLNVM A | OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION TOMORROW | one_time_pad | one_time_pad | null | {} | medium | en | 51 | 51 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
adfgx-v3-0142 | AAFDGAFFFADAFDGXGFDGDDGAFDFDAAADDDXDDAAGGGAAAGGDDAADAAXAGXXDAGGADGDDXAXAFFDAXXAAFDAAGDXAFGXADGAXFXAXGGXXDDDGAAFGDDAGXGAXXAADFADAFXXDGADFFFXGXGAFAFAGADADDAGGAFGGDFAAGFADFDGAAFGF | AAFDGAFFFADAFDGXGFDGDDGAFDFDAAADDDXDDAAGGGAAAGGDDAADAAXAGXXDAGGADGDDXAXAFFDAXXAAFDAAGDXAFGXADGAXFXAXGGXXDDDGAAFGDDAGXGAXXAADFADAFXXDGADFFFXGXGAFAFAGADADDAGGAFGGDFAAGFADFDGAAFGF | IT IS A TRUTH UNIVERSALLY ACKNOWLEDGED THAT A SINGLE MAN IN POSSESSION OF A FORTUNE MUST BE IN WANT OF A WIFE | adfgx | adfgx | fractionation | {
"polybius": "LIBERTY",
"columnar": "FREEDOM"
} | advanced | en | 176 | 176 | cipher_museum | 2.0 | public | null | null |
nomenclator-v2-0352 | 12 01 22 09 04 01 05 19 19 21 05 14 15 25 12 15 19 19 21 05 14 15 19 19 21 05 14 15 19 19 15 14 16 01 18 01 20 15 04 15 19 12 15 19 17 21 05 22 09 22 05 14 02 01 10 15 05 12 03 09 05 12 15 05 20 05 18 14 15 | 12 01 22 09 04 01 05 19 19 21 05 14 15 25 12 15 19 19 21 05 14 15 19 19 21 05 14 15 19 19 15 14 16 01 18 01 20 15 04 15 19 12 15 19 17 21 05 22 09 22 05 14 02 01 10 15 05 12 03 09 05 12 15 05 20 05 18 14 15 | LA VIDA ES SUENO Y LOS SUENOS SUENOS SON PARA TODOS LOS QUE VIVEN BAJO EL CIELO ETERNO | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 138 | 206 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v2-0658 | XWWBSHYZTYITUFFMJ | XWWBSHYZTYITUFFMJ | COURAGE IN DARKNESS | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "VICKSBURG"
} | intermediate | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
vernam-v2-0180 | DWZRESHQHHIFSTYPCSZMLHAUUQSKEJMYQIWIIFJXONWKWSLEJNZQDYIJAMLMPDMTDWJTNXEZQFVXA | DWZRESHQHHIFSTYPCSZMLHAUUQSKEJMYQIWIIFJXONWKWSLEJNZQDYIJAMLMPDMTDWJTNXEZQFVXA | NAVAL UNITS IN POSITION OFF THE COAST AWAITING SIGNAL TO COMMENCE SHORE BOMBARDMENT AT DAWN | vernam | vernam | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
vic-043 | 826828782191590958795818259035910219184828358782850542291518191848280908587851568508062082 | 826828782191590958795818259035910219184828358782850542291518191848280908587851568508062082 | ELEMENTARY MY DEAR WATSON THE GAME IS AFOOT AND THE CRIMINAL IS CLOSE | vic | vic | substitution | {
"type": "keyword",
"value": "SNOWFALL"
} | advanced | en | 90 | 90 | cipher_museum | 0.2 | public | null | null |
cda-0021056 | .... .... .. ... . ..... . . .... ..... .... .... ... .... . ... . ..... ..... .... . ... .. .... ... ..... .. ... . ..... .... .. . ..... ..... ... .... .... . ..... ... ... . .... .... ... .... .... .. ... . ..... . ... . ..... ..... .... ..... .. .. .... .... .... .. ... .... .... .... | .... .... .. ... . ..... . . .... ..... .... .... ... .... . ... . ..... ..... .... . ... .. .... ... ..... .. ... . ..... .... .. . ..... ..... ... .... .... . ..... ... ... . .... .... ... .... .... .. ... . ..... . ... . ..... ..... .... ..... .. .. .... .... .... .. ... .... .... .... | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION | tap_code | tap_code | null | {} | hard | en | 142 | 142 | 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. |
cda-0015126 | ┐· X· ¬ └ Γ· r Γ· ─ ⌐· ┌· ⌐ X K ┌· X· r K X· ┌· L Γ L X L ┌· K· L X r ⌐ ┌· L ⌐· X· └ Γ L X Γ· ¬· ─ ┘· ┐· L ─ X ┘· X· ┌· r L K ┘· ┘· └ X ⌐ └ └ ┘· ⌒ Γ· ─ Γ L ┐· L ─ Γ L ─ K K· L ┌· Γ· ⌐· Γ· r ⌐ K Γ· ┘· ─ K r· L ┌· ⌐ Γ· └ ⌐· L ─ r L r Γ· ┐· r· L ┌· ⌒ ┌· Γ· K L X K L ⌣ K Γ· ─ ⌐ ⌣· Γ· ¬· ⌣· ⌐ ¬· ┐· ⌐ K K L ┌· ─ | ┐· X· ¬ └ Γ· r Γ· ─ ⌐· ┌· ⌐ X K ┌· X· r K X· ┌· L Γ L X L ┌· K· L X r ⌐ ┌· L ⌐· X· └ Γ L X Γ· ¬· ─ ┘· ┐· L ─ X ┘· X· ┌· r L K ┘· ┘· └ X ⌐ └ └ ┘· ⌒ Γ· ─ Γ L ┐· L ─ Γ L ─ K K· L ┌· Γ· ⌐· Γ· r ⌐ K Γ· ┘· ─ K r· L ┌· ⌐ Γ· └ ⌐· L ─ r L r Γ· ┐· r· L ┌· ⌒ ┌· Γ· K L X K L ⌣ K Γ· ─ ⌐ ⌣· Γ· ¬· ⌣· ⌐ ¬· ┐· ⌐ K K L ┌· ─ | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN | pigpen | pigpen | null | {} | medium | en | 53 | 53 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
sigaba-046 | UFXUQEVNQXYZXJWBCKAIRSMGWXXVTXIDTXFZKWNWSDFXTLNOJZHBVCYTW | UFXUQEVNQXYZXJWBCKAIRSMGWXXVTXIDTXFZKWNWSDFXTLNOJZHBVCYTW | FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION | sigaba | sigaba | machine | {
"type": "seed",
"value": "SIGABA"
} | expert | en | 57 | 57 | cipher_museum | 0.2 | public | null | null |
null-cipher-v2-0008 | each now each made your right each time right each and than same now over right tell him | each now each made your right each time right each and than same now over right tell him | ENEMY RETREATS NORTH | null_cipher | null_cipher | steganography | {
"type": "position",
"value": "first"
} | advanced | en | 71 | 88 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v2-0550 | AAHCLEOALLEWIEHCONROEWTNAHLBTMDATSMWERAEWMSIATWAYHESSHNTIASYNULE | AAHCLEOALLEWIEHCONROEWTNAHLBTMDATSMWERAEWMSIATWAYHESSHNTIASYNULE | WHAT IS IN A NAME THAT WHICH WE CALL A ROSE BY ANY OTHER NAME WOULD SMELL AS SWEET | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "DRAGON"
} | intermediate | en | 64 | 64 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-v2-0178 | USBSFOZUFOBHVOGHOYSBJWQYGPIFUHVSUFSOHFWJSFWGBCKCDSBTFCAWHGGCIFQSHCHVSGSO | USBSFOZUFOBHVOGHOYSBJWQYGPIFUHVSUFSOHFWJSFWGBCKCDSBTFCAWHGGCIFQSHCHVSGSO | GENERAL GRANT HAS TAKEN VICKSBURG THE GREAT RIVER IS NOW OPEN FROM ITS SOURCE TO THE SEA | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "JOSEON"
} | beginner | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v2-0348 | EQT IZLLTGLWYY ETMTRGWL AWF XTUKXTX VN GKKL SKGEN ZY MKYXKY WYX VGKCRQE WLTGZUW ZYEK EQT RGTWE AWG | EQT IZLLTGLWYY ETMTRGWL AWF XTUKXTX VN GKKL SKGEN ZY MKYXKY WYX VGKCRQE WLTGZUW ZYEK EQT RGTWE AWG | THE ZIMMERMANN TELEGRAM WAS DECODED BY ROOM FORTY IN LONDON AND BROUGHT AMERICA INTO THE GREAT WAR | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "INDIA"
} | intermediate | en | 82 | 98 | cipher_museum | 2.0 | public | null | null |
great-cipher-v2-0310 | 165 168 173 136 122 131 125 140 141 118 171 176 121 164 121 182 154 117 154 131 109 119 133 175 170 139 142 148 164 106 156 170 163 169 111 142 148 180 111 162 142 171 140 170 169 144 168 142 181 138 141 142 | 165 168 173 136 122 131 125 140 141 118 171 176 121 164 121 182 154 117 154 131 109 119 133 175 170 139 142 148 164 106 156 170 163 169 111 142 148 180 111 162 142 171 140 170 169 144 168 142 181 138 141 142 | NEVER IN THE FIELD OF HUMAN CONFLICT WAS SO MUCH OWED BY SO MANY TO SO FEW BRAVE SOULS | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "FRANCE"
} | expert | en | 156 | 207 | cipher_museum | 2.0 | public | null | null |
porta-v2-0046 | DUUBXJOAUIPVXGOSEANVWZHNVNSQPIIFYTJWHLHBWNLAURTAIHSVDVXYSSDJDRYB | DUUBXJOAUIPVXGOSEANVWZHNVNSQPIIFYTJWHLHBWNLAURTAIHSVDVXYSSDJDRYB | WHAT IS IN A NAME THAT WHICH WE CALL A ROSE BY ANY OTHER NAME WOULD SMELL AS SWEET | porta | porta | polyalphabetic | {
"type": "keyword",
"value": "NAPLES"
} | intermediate | en | 64 | 64 | cipher_museum | 2.0 | public | null | null |
cda-0015155 | 858 821 814 999 859 852 826 857 821 813 837 824 861 854 999 806 825 847 822 813 852 999 801 810 863 802 839 807 813 854 999 858 822 814 999 801 834 845 821 801 803 814 857 999 804 873 999 843 840 813 999 846 842 854 825 859 826 844 840 999 814 802 808 823 999 834 812 857 859 812 852 999 859 822 813 999 835 824 805 852 ... | 858 821 814 999 859 852 826 857 821 813 837 824 861 854 999 806 825 847 822 813 852 999 801 810 863 802 839 807 813 854 999 858 822 814 999 801 834 845 821 801 803 814 857 999 804 873 999 843 840 813 999 846 842 854 825 859 826 844 840 999 814 802 808 823 999 834 812 857 859 812 852 999 859 822 813 999 835 824 805 852 ... | THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY THE INDEX OF COINCIDENCE IS A USEFUL CLUE | culper_ring | culper_ring | null | {} | hard | en | 138 | 138 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
hill-v3-0015 | OXYOSAMWXMGGZG | OXYOSAMWXMGGZG | THE SIEGE BEGINS | hill | hill | polygraphic | {
"a": 3,
"b": 5,
"c": 2,
"d": 9
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
affine-429 | RHGGAN APQJ TLVGWLVPRJO | RHGGAN APQJ TLVGWLVPRJO | SUPPLY LINE COMPROMISED | affine | affine | substitution | {
"a": 21,
"b": 3
} | beginner | en | 21 | 23 | cipher_museum | 0.2 | public | null | null |
cda-0002929 | COGGREA JBEQF UNYC PEROX ZBABOYCUONNGVN FHPFGVGHGNBA BCNA FBHEQS GBBYF OYYBJ VANRCRARRAG INEVSWPOGVBA FNQHEWGL QYOWZF FUBHYR PR GSFGSN HAQNE FNEHGNAL | COGGREA JBEQF UNYC PEROX ZBABOYCUONNGVN FHPFGVGHGNBA BCNA FBHEQS GBBYF OYYBJ VANRCRARRAG INEVSWPOGVBA FNQHEWGL QYOWZF FUBHYR PR GSFGSN HAQNE FNEHGNAL | PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY | porta | porta | null | {
"key": "CIPHER"
} | hard | en | 131 | 131 | synthetic_educational | null | null | [
"kasiski_examination",
"index_of_coincidence"
] | Porta: 13-row table polyalphabetic cipher; reciprocal (encrypt = decrypt). |
commercial-code-v3-0056 | ZUZUZ JAZUZ GAZUZ RAZUZ LAZUZ BEZUZ XAZUZ XUZUZ HABAB ZUZUZ SAZUZ RAZUZ GAZUZ XUZUZ ZUZUZ TAZUZ GAZUZ WAZUZ DAZUZ GAZUZ RAZUZ ZAZUZ XUZUZ ZUZUZ LAZUZ RAZUZ XAZUZ TAZUZ LAZUZ WAZUZ BAZUZ ZAZUZ LAZUZ SAZUZ RAZUZ XUZUZ DABAB ZUZUZ RAZUZ LAZUZ RAZUZ GAZUZ ZAZUZ GEZUZ XUZUZ ZUZUZ RAZUZ LAZUZ RAZUZ GAZUZ XUZUZ ZUZUZ TAZUZ GA... | ZUZUZ JAZUZ GAZUZ RAZUZ LAZUZ BEZUZ XAZUZ XUZUZ HABAB ZUZUZ SAZUZ RAZUZ GAZUZ XUZUZ ZUZUZ TAZUZ GAZUZ WAZUZ DAZUZ GAZUZ RAZUZ ZAZUZ XUZUZ ZUZUZ LAZUZ RAZUZ XAZUZ TAZUZ LAZUZ WAZUZ BAZUZ ZAZUZ LAZUZ SAZUZ RAZUZ XUZUZ DABAB ZUZUZ RAZUZ LAZUZ RAZUZ GAZUZ ZAZUZ GEZUZ XUZUZ ZUZUZ RAZUZ LAZUZ RAZUZ GAZUZ XUZUZ ZUZUZ TAZUZ GA... | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | commercial_code | commercial_code | codebook | {
"type": "none",
"value": null
} | expert | en | 485 | 581 | cipher_museum | 2.0 | public | null | null |
cda-0006038 | ESTR VHUY ZNME UBBP DUVX NZYQ GNNB THJZ TKIV OYFN ZIEJ WVOM APWR TFOV OJXJ SQYQ RFDG YEUB JGAP YXSU JHWD YAMV WFEG PTIV UNLZ ASCM IGGQ IRER VXGD MYUD HZLA GVPY YRHF PFSI KZJH BPHR FHYE YMBZ WING ACGW | ESTR VHUY ZNME UBBP DUVX NZYQ GNNB THJZ TKIV OYFN ZIEJ WVOM APWR TFOV OJXJ SQYQ RFDG YEUB JGAP YXSU JHWD YAMV WFEG PTIV UNLZ ASCM IGGQ IRER VXGD MYUD HZLA GVPY YRHF PFSI KZJH BPHR FHYE YMBZ WING ACGW | ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM ATBASH ENCODES BY REVERSING THE ALPHABET | trithemius | trithemius | null | {} | hard | en | 160 | 160 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
bifid-v3-0564 | WGKDBXLUFSDLGRELGFLTPMGDAOGGTURDIPOREGBDNLDLUHQUPROUULTTGKGXUILNVOTOLOPUQQRHTNRONHHRABFCFORHWPNXWVCRSIRFRCHPXIVHANIDHRDRIDRAPFOIWDETFCIURHBDHCHTGEOMFNIIEEYWREXTC | WGKDBXLUFSDLGRELGFLTPMGDAOGGTURDIPOREGBDNLDLUHQUPROUULTTGKGXUILNVOTOLOPUQQRHTNRONHHRABFCFORHWPNXWVCRSIRFRCHPXIVHANIDHRDRIDRAPFOIWDETFCIURHBDHCHTGEOMFNIIEEYWREXTC | WHENEVER ANY FORM OF GOVERNMENT BECOMES DESTRUCTIVE OF THESE ENDS IT IS THE RIGHT OF THE PEOPLE TO ALTER OR TO ABOLISH IT AND TO INSTITUTE NEW GOVERNMENT LAYING ITS FOUNDATION ON SUCH PRINCIPLES | bifid | bifid | fractionation | {
"type": "keyword",
"value": "TRIUMPH"
} | advanced | en | 161 | 161 | cipher_museum | 2.0 | public | null | null |
vigenere-v2-0474 | PHVQQADARDRVBKALVXZODSAJUMQFZEUSGFFKMWFZHPENCFVRFJAEUJFFQGYKIAVNITRQBKKTYVOFVWTNRZ | PHVQQADARDRVBKALVXZODSAJUMQFZEUSGFFKMWFZHPENCFVRFJAEUJFFQGYKIAVNITRQBKKTYVOFVWTNRZ | THE ZIMMERMANN TELEGRAM WAS DECODED BY ROOM FORTY IN LONDON AND BROUGHT AMERICA INTO THE GREAT WAR | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "WARRIOR"
} | intermediate | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
cda-0012388 | r· Γ· └ └ r Γ· ┐· r· L ┌· X· X L X └ Γ· ─ L ⌐ ┌· ⌐ └ ¬· L ¬ ┌· ⌐ K ┘· L ─ r ┌· ⌒· ┐· K ¬ └ ┘· r ┐ X ┘· ⌐· └ L K K L ┌· X ┐· ⌐ K K L ┌· ─ ⌒ ┘· ┌· Γ X r· L └ ┐· ¬ ┌· L ⌐ ┐ ┌ ┘· ─ ┘· ⌐ └ ┐· r· ⌐ ¬ L K Γ· r X X· ¬ X K Γ· K X· K Γ· ┘· ─ K r· L Γ· ─ Γ L ⌣ ┘· ⌐· r ┘· Γ· ─ r Γ· Γ L ─ r L Γ· X ⌐ X· X L ⌐· X· └ r └ X· L | r· Γ· └ └ r Γ· ┐· r· L ┌· X· X L X └ Γ· ─ L ⌐ ┌· ⌐ └ ¬· L ¬ ┌· ⌐ K ┘· L ─ r ┌· ⌒· ┐· K ¬ └ ┘· r ┐ X ┘· ⌐· └ L K K L ┌· X ┐· ⌐ K K L ┌· ─ ⌒ ┘· ┌· Γ X r· L └ ┐· ¬ ┌· L ⌐ ┐ ┌ ┘· ─ ┘· ⌐ └ ┐· r· ⌐ ¬ L K Γ· r X X· ¬ X K Γ· K X· K Γ· ┘· ─ K r· L Γ· ─ Γ L ⌣ ┘· ⌐· r ┘· Γ· ─ r Γ· Γ L ─ r L Γ· X ⌐ X· X L ⌐· X· └ r └ X· L | HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION THE INDEX OF COINCIDENCE IS A USEFUL CLUE | pigpen | pigpen | null | {} | medium | en | 56 | 56 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
cda-0020035 | .... .... .. ... . ..... . .... . ..... .... .... . ..... . ... .... .... .. .... ..... . . ..... .... ... .... .... .... ..... . .... .. .... . ..... .... ... ... ..... . . .... .... .... .... . ..... .... .. ... ... .... ... . .. . ..... .. . ... .... .... .. . ..... ... .. . . . ..... | .... .... .. ... . ..... . .... . ..... .... .... . ..... . ... .... .... .. .... ..... . . ..... .... ... .... .... .... ..... . .... .. .... . ..... .... ... ... ..... . . .... .... .... .... . ..... .... .. ... ... .... ... . .. . ..... .. . ... .... .... .. . ..... ... .. . . . ..... | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | tap_code | tap_code | null | {} | hard | en | 192 | 192 | 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. |
zimmermann-v3-0048 | 99999 90002 90000 90011 90011 99998 00047 99999 90008 90018 90007 90012 90000 90004 90011 99998 00063 99999 90024 90004 90000 90017 90018 99998 99999 90000 90006 90014 99998 99999 90013 90004 90021 90004 90017 99998 99999 90012 90008 90013 90003 99998 00082 99999 90011 90014 90013 90006 99998 99999 90015 90017 90004 90... | 99999 90002 90000 90011 90011 99998 00047 99999 90008 90018 90007 90012 90000 90004 90011 99998 00063 99999 90024 90004 90000 90017 90018 99998 99999 90000 90006 90014 99998 99999 90013 90004 90021 90004 90017 99998 99999 90012 90008 90013 90003 99998 00082 99999 90011 90014 90013 90006 99998 99999 90015 90017 90004 90... | CALL ME ISHMAEL SOME YEARS AGO NEVER MIND HOW LONG PRECISELY I THOUGHT I WOULD SAIL ABOUT AND SEE THE OCEAN | zimmermann | zimmermann | codebook | {
"type": "none",
"value": null
} | expert | en | 465 | 557 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v2-0200 | FTPOSSOEITFIJTTSTQWCOAEIEOSZSBFTCOFIRZPURTYOFTSEVJIYZHHMEIJZYXHHAIFTSVIJPOXSI | FTPOSSOEITFIJTTSTQWCOAEIEOSZSBFTCOFIRZPURTYOFTSEVJIYZHHMEIJZYXHHAIFTSVIJPOXSI | RECONNOITER THE ENEMY POSITION AND REPORT BACK BEFORE NIGHTFALL WITH A FULL STRENGTH COUNT | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "AXUM"
} | advanced | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
autokey-v2-0521 | LIVXLOIUGDKHRSDDOCW | LIVXLOIUGDKHRSDDOCW | CODED MESSAGE FOLLOWS | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
vigenere-v2-0415 | OITLBDRPRZSCGJETUVCGEKBZJ | OITLBDRPRZSCGJETUVCGEKBZJ | SICUT PATRIBUS SIT DEUS NOBIS | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "WARRIOR"
} | intermediate | en | 25 | 25 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0404 | ALRLVBIQOUQPOLIQUNRKHYCKEOIYRMRBGSTYQUQSCHDVDFTWNUSUKKEEQGGDSBDCPLKMBBEPCKCW | ALRLVBIQOUQPOLIQUNRKHYCKEOIYRMRBGSTYQUQSCHDVDFTWNUSUKKEEQGGDSBDCPLKMBBEPCKCW | ENEMY FORCES REPORTED MOVING TOWARD GETTYSBURG CAVALRY HAS CONFIRMED THE FULL SIGHTING | four_square | four_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0259 | NQORNTQRZIQABV | NQORNTQRZIQABV | TRUST BUT VERIFY | four_square | four_square | polygraphic | {
"key1": "TRIUMPH",
"key2": "JUSTICE"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
cda-0004601 | NGONFU RAPBQRF OL ERIREFVAT GUR NYCUNORG UBARFGYL | NGONFU RAPBQRF OL ERIREFVAT GUR NYCUNORG UBARFGYL | ATBASH ENCODES BY REVERSING THE ALPHABET HONESTLY | rot13 | rot13 | null | {
"shift": 13
} | medium | en | 43 | 43 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
lorenz-v3-0301 | INTHESEVENTEENTHCENTURYISAACNEWTONSYNTHESIZEDTHEWORKOFCOPERNICUSGALILEOANDKEPLERINTOAUNIFIEDTHEORYOFGRAVITATIONTHATEXPLAINEDBOTHTHEFALLOFAPPLESANDTHEORBITSOFPLANETS | INTHESEVENTEENTHCENTURYISAACNEWTONSYNTHESIZEDTHEWORKOFCOPERNICUSGALILEOANDKEPLERINTOAUNIFIEDTHEORYOFGRAVITATIONTHATEXPLAINEDBOTHTHEFALLOFAPPLESANDTHEORBITSOFPLANETS | IN THE SEVENTEENTH CENTURY ISAAC NEWTON SYNTHESIZED THE WORK OF COPERNICUS GALILEO AND KEPLER INTO A UNIFIED THEORY OF GRAVITATION THAT EXPLAINED BOTH THE FALL OF APPLES AND THE ORBITS OF PLANETS | lorenz | lorenz | machine | {
"type": "seed",
"value": "COLOSSUS"
} | expert | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
chinese-telegraph-v2-0301 | 5563 4614 4427 5329 5645 4154 4871 4680 5563 5963 5060 4489 4934 4427 5397 4298 5963 4680 5488 4998 5060 5563 5488 5563 5397 4154 4680 4998 4427 4361 4680 5563 4361 5397 5060 5166 5166 4427 5563 4614 4154 5488 5563 4614 4427 4550 4427 4998 5563 4871 4427 5397 4154 4680 4998 4489 5397 5060 4934 4614 4427 4154 5741 4427 ... | 5563 4614 4427 5329 5645 4154 4871 4680 5563 5963 5060 4489 4934 4427 5397 4298 5963 4680 5488 4998 5060 5563 5488 5563 5397 4154 4680 4998 4427 4361 4680 5563 4361 5397 5060 5166 5166 4427 5563 4614 4154 5488 5563 4614 4427 4550 4427 4998 5563 4871 4427 5397 4154 4680 4998 4489 5397 5060 4934 4614 4427 4154 5741 4427 ... | THE QUALITY OF MERCY IS NOT STRAINED IT DROPPETH AS THE GENTLE RAIN FROM HEAVEN ABOVE | chinese_telegraph | chinese_telegraph | codebook | {
"type": "additive",
"value": "14142"
} | expert | en | 280 | 349 | cipher_museum | 2.0 | public | null | null |
red-type-a-v3-0158 | MTOYDZATZAPCDADYGCYDADIQMCUHWYORNTUTURODAPBUSQUURFUGHIVETUMCATGYFEBK | MTOYDZATZAPCDADYGCYDADIQMCUHWYORNTUTURODAPBUSQUURFUGHIVETUMCATGYFEBK | THE ONLY THING NECESSARY FOR THE TRIUMPH OF EVIL IS FOR GOOD MEN TO DO NOTHING AT ALL | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "YAMATO"
} | advanced | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
cda-0012339 | 06354 2553 1667 04710 4478 1650 06354 02917 4162 1660 05029 0389 1286 02856 06007 6347 02588 1664 04797 5691 01627 06344 02913 00981 0396 03803 3860 7894 06648 4419 00631 5694 01592 0321 3483 00407 00642 03822 1587 02855 1897 6635 6062 1622 01309 00950 04736 5669 05682 1655 0957 06322 3812 7887 | 06354 2553 1667 04710 4478 1650 06354 02917 4162 1660 05029 0389 1286 02856 06007 6347 02588 1664 04797 5691 01627 06344 02913 00981 0396 03803 3860 7894 06648 4419 00631 5694 01592 0321 3483 00407 00642 03822 1587 02855 1897 6635 6062 1622 01309 00950 04736 5669 05682 1655 0957 06322 3812 7887 | THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY | zimmermann | zimmermann | null | {} | medium | en | 54 | 54 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
nihilist-v3-0380 | 85 25 80 53 36 96 38 87 45 23 97 38 59 32 57 84 37 59 32 57 103 27 56 54 56 64 26 58 32 36 105 59 49 32 56 73 25 80 53 36 96 47 90 45 27 97 46 59 74 26 65 48 49 46 35 66 56 59 34 23 85 37 86 65 43 64 49 68 56 36 66 26 46 36 46 76 56 70 45 25 85 25 80 35 24 103 25 68 46 45 76 29 80 53 36 66 27 56 35 37 83 27 47 73 45 97... | 85 25 80 53 36 96 38 87 45 23 97 38 59 32 57 84 37 59 32 57 103 27 56 54 56 64 26 58 32 36 105 59 49 32 56 73 25 80 53 36 96 47 90 45 27 97 46 59 74 26 65 48 49 46 35 66 56 59 34 23 85 37 86 65 43 64 49 68 56 36 66 26 46 36 46 76 56 70 45 25 85 25 80 35 24 103 25 68 46 45 76 29 80 53 36 66 27 56 35 37 83 27 47 73 45 97... | IN THE SEVENTEENTH CENTURY ISAAC NEWTON SYNTHESIZED THE WORK OF COPERNICUS GALILEO AND KEPLER INTO A UNIFIED THEORY OF GRAVITATION THAT EXPLAINED BOTH THE FALL OF APPLES AND THE ORBITS OF PLANETS | nihilist | nihilist | fractionation | {
"polybius": "NARODNAYA",
"keyword": "VOLYA"
} | advanced | en | 331 | 494 | cipher_museum | 2.0 | public | null | null |
cda-0018572 | 66 36 82 11 82 66 82 52 66 50 95 82 61 66 59 11 50 82 61 65 68 66 66 82 80 29 61 20 82 76 69 80 82 77 68 55 50 29 25 52 57 68 50 77 61 61 59 20 61 66 50 66 59 66 50 69 29 52 50 65 36 82 80 61 77 68 65 82 68 52 36 57 82 66 66 82 80 66 69 68 11 50 76 76 82 80 82 29 66 57 82 66 66 82 80 65 82 82 80 80 82 95 50 82 89 68 29... | 66 36 82 11 82 66 82 52 66 50 95 82 61 66 59 11 50 82 61 65 68 66 66 82 80 29 61 20 82 76 69 80 82 77 68 55 50 29 25 52 57 68 50 77 61 61 59 20 61 66 50 66 59 66 50 69 29 52 50 65 36 82 80 61 77 68 65 82 68 52 36 57 82 66 66 82 80 66 69 68 11 50 76 76 82 80 82 29 66 57 82 66 66 82 80 65 82 82 80 80 82 95 50 82 89 68 29... | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH FAIL CLOSED IS A POSTURE NOT A SLOGAN | wallis_cipher | wallis_cipher | null | {} | hard | en | 169 | 169 | 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-0018654 | AAAAB BAAAA BAABB BAABA AABAA AABAB ABBAB BAAAA AAABA AABAA BABAA ABBAB BAAAA ABAAB BAAAB ABBAB ABBAA ABABA BABBA BABAA AABBB AABAA ABBAA BAABA AABBB AABAA ABAAB AABAA BABBA BAAAB ABBBA AAAAA AAABA AABAA ABAAA BAAAB BAAAB ABABB AAAAA ABABA ABABA AAAAA ABABA AAAAA ABBAA BAABA BAABB BAAAA ABAAA ABBAA AABBA AAAAB BAAAA AB... | AAAAB BAAAA BAABB BAABA AABAA AABAB ABBAB BAAAA AAABA AABAA BABAA ABBAB BAAAA ABAAB BAAAB ABBAB ABBAA ABABA BABBA BABAA AABBB AABAA ABBAA BAABA AABBB AABAA ABAAB AABAA BABBA BAAAB ABBBA AAAAA AAABA AABAA ABAAA BAAAB BAAAB ABABB AAAAA ABABA ABABA AAAAA ABABA AAAAA ABBAA BAABA BAABB BAAAA ABAAA ABBAA AABBA AAAAB BAAAA AB... | BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX | bacon_cipher | bacon_cipher | null | {} | hard | en | 1,025 | 1,025 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
cda-0004501 | IHZNG XOIOE CSVQA KHKID ZEMZT WKRUJ ECZNM LSBKQ HMUBB QHGKJ SWIZI QPMCT VGFYQ REROR SI | IHZNG XOIOE CSVQA KHKID ZEMZT WKRUJ ECZNM LSBKQ HMUBB QHGKJ SWIZI QPMCT VGFYQ REROR SI | ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION A STRONG CLAIM NEEDS STRONG EVIDENCE | beaufort | beaufort | null | {
"key": "MUSEUM"
} | medium | en | 72 | 72 | synthetic_educational | null | null | [
"kasiski_examination",
"friedman_test",
"index_of_coincidence"
] | Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption). |
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