id stringlengths 7 52 | text stringlengths 6 2.11k | ciphertext stringlengths 6 2.11k | plaintext stringlengths 6 282 | label stringclasses 81
values | cipher stringclasses 81
values | cipher_family stringclasses 13
values | key unknown | difficulty stringclasses 7
values | language stringclasses 8
values | text_length int64 6 1.09k | length int64 6 1.28k | source stringclasses 2
values | dataset_version stringclasses 2
values | split stringclasses 1
value | attack_methods listlengths 0 3 ⌀ | educational_note stringclasses 32
values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
cda-0019659 | RMJVYYWHFDRZXUGZHLVWTCSVOIJQFHXBDILXDXASP | RMJVYYWHFDRZXUGZHLVWTCSVOIJQFHXBDILXDXASP | HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION | running_key | running_key | null | {} | medium | en | 41 | 41 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
rot13-v2-0091 | GUR FRPERG YVRF OHEVRQ ORARNGU GUR GUVEQ SYNTFGBAR BS GUR BYQ PUHEPU PBHEGLNEQ NG QNJA GBZBEEBJ | GUR FRPERG YVRF OHEVRQ ORARNGU GUR GUVEQ SYNTFGBAR BS GUR BYQ PUHEPU PBHEGLNEQ NG QNJA GBZBEEBJ | THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW | rot13 | rot13 | substitution | {
"type": "none",
"value": null
} | beginner | en | 80 | 95 | cipher_museum | 2.0 | public | null | null |
jn25-001 | 41415 41424 41424 41415 41417 41425 41415 41424 41418 41415 41437 41428 | 41415 41424 41424 41415 41417 41425 41415 41424 41418 41415 41437 41428 | ATTACK AT DAWN | jn25 | jn25 | codebook | {
"type": "additive",
"value": "31415"
} | expert | en | 60 | 71 | cipher_museum | 0.2 | public | null | null |
cda-0021375 | ytaiin aiiin aiiin okshy qokal kaiiin shal okedy rcheol rcheol kaiiin shedy shaiin oxed | ytaiin aiiin aiiin okshy qokal kaiiin shal okedy rcheol rcheol kaiiin shedy shaiin oxed | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | voynich_render | voynich_render | null | {} | medium | en | 74 | 74 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
cda-0013550 | 44 23 15 31 24 12 42 11 42 54 35 42 15 43 15 42 51 15 43 25 33 34 52 31 15 14 22 15 21 34 42 44 23 15 13 34 32 32 45 33 24 44 54 | 44 23 15 31 24 12 42 11 42 54 35 42 15 43 15 42 51 15 43 25 33 34 52 31 15 14 22 15 21 34 42 44 23 15 13 34 32 32 45 33 24 44 54 | THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | polybius | polybius | null | {} | medium | en | 43 | 43 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
nihilist-v3-0068 | 45 24 57 75 26 30 56 23 79 75 47 59 36 34 69 75 56 59 36 25 59 87 27 50 32 27 56 88 57 40 36 37 59 56 64 30 55 55 56 78 35 29 56 46 67 75 55 48 36 34 88 69 25 59 65 37 59 59 25 57 65 37 79 86 34 46 65 55 88 69 28 58 66 46 | 45 24 57 75 26 30 56 23 79 75 47 59 36 34 69 75 56 59 36 25 59 87 27 50 32 27 56 88 57 40 36 37 59 56 64 30 55 55 56 78 35 29 56 46 67 75 55 48 36 34 88 69 25 59 65 37 59 59 25 57 65 37 79 86 34 46 65 55 88 69 28 58 66 46 | GALILEO POINTED HIS TELESCOPE AT THE HEAVENS AND CONFIRMED THAT THE EARTH ORBITS THE SUN | nihilist | nihilist | fractionation | {
"polybius": "PALACE",
"keyword": "BATTLE"
} | advanced | en | 148 | 221 | cipher_museum | 2.0 | public | null | null |
monoalphabetic-480 | GPYMSVKVHYQCQ CQ SBN VPS LR IPNVFCKA GLENQ WCSBLTS SBN FNY VKE CS BVQ INNK MPVGSCGNE RLP VQ HLKA VQ SBNPN BVUN INNK GLENQ SL IPNVF SBN BCQSLPY LR GPYMSLHLAY CQ V IVSSHN LR WCSQ | GPYMSVKVHYQCQ CQ SBN VPS LR IPNVFCKA GLENQ WCSBLTS SBN FNY VKE CS BVQ INNK MPVGSCGNE RLP VQ HLKA VQ SBNPN BVUN INNK GLENQ SL IPNVF SBN BCQSLPY LR GPYMSLHLAY CQ V IVSSHN LR WCSQ | 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 | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "VIGENERE"
} | beginner | en | 143 | 176 | cipher_museum | 0.2 | public | null | null |
kryha-v2-0281 | GCHILBHOSLGDAGQJTSCBZ | GCHILBHOSLGDAGQJTSCBZ | PATIENCE BRINGS VICTORY | kryha | kryha | machine | {
"type": "keyword",
"value": "PRAGUE"
} | expert | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
diana-v2-0612 | JJLXROBXPALPSMOORQQKQXYXCWOVXYGZPXMUGIWKHHXASRZWUXELXZXEZKLELIYCLWJZWSNYQMZKTYNNWXHTUNLKLWTOJJAPBTRMWRVWFMKAIPXCJNENZGZMDDWQLSQYXAQOTXDRMHASSOM | JJLXROBXPALPSMOORQQKQXYXCWOVXYGZPXMUGIWKHHXASRZWUXELXZXEZKLELIYCLWJZWSNYQMZKTYNNWXHTUNLKLWTOJJAPBTRMWRVWFMKAIPXCJNENZGZMDDWQLSQYXAQOTXDRMHASSOM | WITH MALICE TOWARD NONE WITH CHARITY FOR ALL WITH FIRMNESS IN THE RIGHT AS GOD GIVES US TO SEE THE RIGHT LET US STRIVE ON TO FINISH THE WORK WE ARE IN TO BIND UP THE NATIONS WOUNDS | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "FREEDOM"
} | intermediate | en | 143 | 143 | cipher_museum | 2.0 | public | null | null |
nomenclator-v2-0321 | 15 14 03 05 21 16 15 14 01 93 04 18 05 01 18 25 23 08 09 12 05 09 16 15 14 04 05 18 05 04 23 05 01 11 61 23 05 01 18 25 15 22 05 18 13 01 14 25 01 17 21 01 09 14 20 22 15 12 21 13 05 62 12 15 18 05 | 15 14 03 05 21 16 15 14 01 93 04 18 05 01 18 25 23 08 09 12 05 09 16 15 14 04 05 18 05 04 23 05 01 11 61 23 05 01 18 25 15 22 05 18 13 01 14 25 01 17 21 01 09 14 20 22 15 12 21 13 05 62 12 15 18 05 | ONCE UPON A MIDNIGHT DREARY WHILE I PONDERED WEAK AND WEARY OVER MANY A QUAINT VOLUME OF LORE | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 132 | 197 | cipher_museum | 2.0 | public | null | null |
cda-0014600 | DALK AIII NQOK EDYD ARAL DARA LYPC HOLO TEDY SHAL DAIN YCTA IINQ OKEE DYOK EEDY QOKE EDYY KCHE OLQO KEDY OKAI NCHE OLRC HEOL OKEE DYCT AIIN OTED YRCH EOLO RORC HEDA LSHA IINA IIIN SHOR OKEE DYCH EDAL QOTE DYDA IINQ OKAL OTAI INRA IINO TOLC HEDA LDAI NYOT EDYO KSHY RCHE OLCH EDAL RAII NQOT EDYR CHEO LQOK ALSH EDYQ OKEE ... | DALK AIII NQOK EDYD ARAL DARA LYPC HOLO TEDY SHAL DAIN YCTA IINQ OKEE DYOK EEDY QOKE EDYY KCHE OLQO KEDY OKAI NCHE OLRC HEOL OKEE DYCT AIIN OTED YRCH EOLO RORC HEDA LSHA IINA IIIN SHOR OKEE DYCH EDAL QOTE DYDA IINQ OKAL OTAI INRA IINO TOLC HEDA LDAI NYOT EDYO KSHY RCHE OLCH EDAL RAII NQOT EDYR CHEO LQOK ALSH EDYQ OKEE ... | THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY | voynich_render | voynich_render | null | {} | hard | en | 258 | 258 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
one-time-pad-v2-0136 | DKZLLMLLCHEUOTXBV | DKZLLMLLCHEUOTXBV | NOVUS ORDO SECLORUM | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
adfgx-v3-0330 | DAAFAFGADDXFFDAFFGGGAXGAXGAAGFXGGDGXDDDX | DAAFAFGADDXFFDAFFGGGAXGAXGAAGFXGGDGXDDDX | STEAM POWER TRANSFORMS | adfgx | adfgx | fractionation | {
"polybius": "DRAGON",
"columnar": "THUNDER"
} | advanced | en | 40 | 40 | cipher_museum | 2.0 | public | null | null |
trithemius-v3-0045 | SUGDQ UUDMA DCMAGUEIEL | SUGDQ UUDMA DCMAGUEIEL | STEAM POWER TRANSFORMS | trithemius | trithemius | polyalphabetic | {
"type": "none",
"value": null
} | beginner | en | 20 | 22 | cipher_museum | 2.0 | public | null | null |
chaocipher-v2-0395 | PTRNPXLBYHTYJLUDSIG | PTRNPXLBYHTYJLUDSIG | CODED MESSAGE FOLLOWS | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
cardano-autokey-v2-0094 | OQRHHWKRNFEUAKAWBVVQLKCTXWWRRQKDTFTGWSSKWQNMTVTGLZBTZALFPFUHVNEBAOLEVTYRKBTWPVPSHVBL | OQRHHWKRNFEUAKAWBVVQLKCTXWWRRQKDTFTGWSSKWQNMTVTGLZBTZALFPFUHVNEBAOLEVTYRKBTWPVPSHVBL | CODED TRANSMISSION INDICATES ENEMY FORCES ASSEMBLING ALONG THE BORDER WITH HEAVY ARTILLERY UNITS | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "MILAN"
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
two-square-017 | MEETEVRLEOLDRRKX | MEETEVRLEOLDRRKX | MEET AT THE OLD OAK | two_square | two_square | polygraphic | {
"key1": "EXAMPLE",
"key2": "KEYWORD"
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
cda-0012410 | KZIU CKVD IHHQ YMCY PFWM MERG LCIN TTUG PWQD CSMP IKLE RHBU CASH XLTX ITOP BCQP GZZL GTBE DLOL HFXE EDFH NRLD AFEO YKZG UOIA YZJM RCHF PLNV OEEV MJAA FETC QPSG JDOV DHWI AAMW PMGY VZTV XDNG FQTQ BTHF XSSZ ITDR KEKW EFBU TVVK JSHM FDFU KECB CCVE DDHE QFB | KZIU CKVD IHHQ YMCY PFWM MERG LCIN TTUG PWQD CSMP IKLE RHBU CASH XLTX ITOP BCQP GZZL GTBE DLOL HFXE EDFH NRLD AFEO YKZG UOIA YZJM RCHF PLNV OEEV MJAA FETC QPSG JDOV DHWI AAMW PMGY VZTV XDNG FQTQ BTHF XSSZ ITDR KEKW EFBU TVVK JSHM FDFU KECB CCVE DDHE QFB | ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS HONESTLY | vernam | vernam | null | {} | hard | en | 203 | 203 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
kryha-v2-0366 | ETFXOBMXBFGSTNSCYWEWEFNWLYEVRBYCUKOCAKIDIHTWPPFDUAFJIKXULQCGYENKOADWNTCERJNPBLKPGBFGJWHWHKYFMRUTPXVAXABIKHFEFWGJPQMFZCTWVBZMEHHNHDKMSJRSBAMUSEAMIYSZTJSWJRXUEXVB | ETFXOBMXBFGSTNSCYWEWEFNWLYEVRBYCUKOCAKIDIHTWPPFDUAFJIKXULQCGYENKOADWNTCERJNPBLKPGBFGJWHWHKYFMRUTPXVAXABIKHFEFWGJPQMFZCTWVBZMEHHNHDKMSJRSBAMUSEAMIYSZTJSWJRXUEXVB | THAT ON THE FIRST DAY OF JANUARY IN THE YEAR OF OUR LORD ONE THOUSAND EIGHT HUNDRED AND SIXTY THREE ALL PERSONS HELD AS SLAVES WITHIN ANY STATE IN REBELLION AGAINST THE UNITED STATES SHALL BE FREE | kryha | kryha | machine | {
"type": "keyword",
"value": "PRAGUE"
} | expert | en | 160 | 160 | cipher_museum | 2.0 | public | null | null |
enigma-v2-0266 | UDOLJYNQMNFSFO | UDOLJYNQMNFSFO | PRESS THE ATTACK | enigma | enigma | machine | {
"type": "rotor_start",
"value": "GHI"
} | expert | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0161 | EKURQRQEDDFRKXQCMROELGGTEUDEYTRDEPASPCLZLHTDKSMEZFQQBPSDRDEPYEQUHLRE | EKURQRQEDDFRKXQCMROELGGTEUDEYTRDEPASPCLZLHTDKSMEZFQQBPSDRDEPYEQUHLRE | COWARDS DIE MANY TIMES BEFORE THEIR DEATHS THE VALIANT NEVER TASTE DEATH BUT ONCE | four_square | four_square | polygraphic | {
"key1": "LIBERTY",
"key2": "FREEDOM"
} | advanced | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
cda-0019226 | 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 65 69 57 43 20 50 59 61 82 29 52 69 11 82 11 57 82 66 66 82 80 61 68 61 65 68 50 80 61 69 76 29 59 77 20 82 80 61 76 80 69 77 69 29 82 66 69 76 50 95 82 11 69 59 20 57... | 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 65 69 57 43 20 50 59 61 82 29 52 69 11 82 11 57 82 66 66 82 80 61 68 61 65 68 50 80 61 69 76 29 59 77 20 82 80 61 76 80 69 77 69 29 82 66 69 76 50 95 82 11 69 59 20 57... | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE | wallis_cipher | wallis_cipher | null | {} | hard | en | 151 | 151 | 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-0007329 | GRQIEWHL QZOWAF EVBGZQ PS GSGGSR HNRRD GNDIGWBL EIPEHVFIGWCA QWCVSEE AOB SOQV YSHGSF GA O QWNSSFRNH YSHGSF RNHEADL ASOEIESG HNQRDHOWBGK WA O RVEHEWPHFWBN | GRQIEWHL QZOWAF EVBGZQ PS GSGGSR HNRRD GNDIGWBL EIPEHVFIGWCA QWCVSEE AOB SOQV YSHGSF GA O QWNSSFRNH YSHGSF RNHEADL ASOEIESG HNQRDHOWBGK WA O RVEHEWPHFWBN | SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION | porta | porta | null | {
"key": "KEY"
} | hard | en | 132 | 132 | synthetic_educational | null | null | [] | |
jn25-v2-0292 | 21248 21249 21242 21244 21232 21243 21244 21235 21242 21232 21249 21246 21238 21243 21230 21233 21242 21247 21237 21249 21255 21242 21243 21239 | 21248 21249 21242 21244 21232 21243 21244 21235 21242 21232 21249 21246 21238 21243 21230 21233 21242 21247 21237 21249 21255 21242 21243 21239 | NORTH STAR HOLDS FIRM COURSE | jn25 | jn25 | codebook | {
"type": "additive",
"value": "11235"
} | expert | en | 120 | 143 | cipher_museum | 2.0 | public | null | null |
cda-0021769 | K r· L Γ L K L r K Γ· K· L X K X· Γ Γ· L X ┐· ⌐ K K L ┌· ─ X ¬ L ⌐· ┘· ┌· L ┌ ⌐ ┐ Γ· ─ ¬· r └ ⌐ Γ· ┌ X K ⌒ ┘· X └· X· ⌐ ┌· L r Γ· ┐· r· L ┌· L ─ r ┌· ⌒· ┐· K X Γ Γ· ¬· ┌· ⌐ ┐· r· X ⌒ Γ· K r· K ⌒ ┘· ┐· ┘· └ ⌒· ¬ Γ· X· X ⌐ └ ┐· r· ⌐ ¬ L K X L ┌· ┌· ┘· ┌· r ┘· ┌· ┌· L r K Γ· ┘· ─ ⌐ ─ Γ Γ L K L r K Γ· ┘· ─ ⌐ ┌· L ⌐· X· ─ Γ... | K r· L Γ L K L r K Γ· K· L X K X· Γ Γ· L X ┐· ⌐ K K L ┌· ─ X ¬ L ⌐· ┘· ┌· L ┌ ⌐ ┐ Γ· ─ ¬· r └ ⌐ Γ· ┌ X K ⌒ ┘· X └· X· ⌐ ┌· L r Γ· ┐· r· L ┌· L ─ r ┌· ⌒· ┐· K X Γ Γ· ¬· ┌· ⌐ ┐· r· X ⌒ Γ· K r· K ⌒ ┘· ┐· ┘· └ ⌒· ¬ Γ· X· X ⌐ └ ┐· r· ⌐ ¬ L K X L ┌· ┌· ┘· ┌· r ┘· ┌· ┌· L r K Γ· ┘· ─ ⌐ ─ Γ Γ L K L r K Γ· ┘· ─ ⌐ ┌· L ⌐· X· ─ Γ... | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS | pigpen | pigpen | null | {} | medium | en | 70 | 70 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
caesar-vf-0102 | GRKZVETV FLKCRJKJ RCC FSJKRTCVJ | GRKZVETV FLKCRJKJ RCC FSJKRTCVJ | PATIENCE OUTLASTS ALL OBSTACLES | caesar | caesar | substitution | {
"type": "shift",
"value": 17
} | beginner | en | 28 | 31 | cipher_museum | 2.0 | public | null | null |
beaufort-v3-0373 | HHYUKTROHGXAPFZXVBQUFDJJZOHOZFNAAIQDJZYKCYQMTXLPDNJIBZUEDINZODAZWAJGHFZNXIKC | HHYUKTROHGXAPFZXVBQUFDJJZOHOZFNAAIQDJZYKCYQMTXLPDNJIBZUEDINZODAZWAJGHFZNXIKC | AT THE BATTLE OF MIDWAY AMERICAN DIVE BOMBERS DESTROYED FOUR JAPANESE CARRIERS IN MINUTES | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "HARBOUR"
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
fialka-v2-0419 | TRMKSTKDEAXBUXCBKXNQJNOINHXATGENVKRCKBMOXIWWODDAO | TRMKSTKDEAXBUXCBKXNQJNOINHXATGENVKRCKBMOXIWWODDAO | ALL THAT GLITTERS IS NOT GOLD OFTEN HAVE YOU HEARD THAT TOLD | fialka | fialka | machine | {
"type": "seed",
"value": "SPUTNIK"
} | expert | en | 49 | 49 | cipher_museum | 2.0 | public | null | null |
cda-0015031 | .. -. -.. . -..- / --- ..-. / -.-. --- .. -. -.-. .. -.. . -. -.-. . / -- . .- ... ..- .-. . ... / .-.. . - - . .-. / ..-. .-. . --.- ..- . -. -.-. -.-- / -.. .. ... - .-. .. -... ..- - .. --- -. / .... .. ... - --- .-. .. -.-. .- .-.. / -.-. .. .--. .... . .-. ... / .- .-. . / - . .- -.-. .... . .-. ... / -. --- - / .... | .. -. -.. . -..- / --- ..-. / -.-. --- .. -. -.-. .. -.. . -. -.-. . / -- . .- ... ..- .-. . ... / .-.. . - - . .-. / ..-. .-. . --.- ..- . -. -.-. -.-- / -.. .. ... - .-. .. -... ..- - .. --- -. / .... .. ... - --- .-. .. -.-. .- .-.. / -.-. .. .--. .... . .-. ... / .- .-. . / - . .- -.-. .... . .-. ... / -. --- - / .... | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS | morse_code | morse_code | null | {} | hard | en | 149 | 149 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
vigenere-469 | IZBCTRVFIEOZJTPRITSRMEYLTDTGTNEYTEHCWTQJCZBJJRQEISEKNNL | IZBCTRVFIEOZJTPRITSRMEYLTDTGTNEYTEHCWTQJCZBJJRQEISEKNNL | TO BE OR NOT TO BE THAT IS THE QUESTION WHETHER TIS NOBLER IN THE MIND | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "PLAYFAIR"
} | intermediate | en | 55 | 55 | cipher_museum | 0.2 | public | null | null |
cardano-autokey-198 | NVLENFYXVIVEDLVT | NVLENFYXVIVEDLVT | BURN AFTER READING | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
joseon-yeokhak-v2-0387 | LZWZSJTGJAKUDWSJ | LZWZSJTGJAKUDWSJ | THE HARBOR IS CLEAR | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "DYNASTY"
} | beginner | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0012900 | CQVWEQIWFCUYZVHOXUQQPQONAFBPOLOFOPZWJSNGERVKVLERQAYIXOBGTFJXNFWHKJYSODHNVVMMJTDFKOORQUGUBALOJKCBLYCNNSTXZBHIHQOLTSGXZPYCAINUJOLQLCXTJZXEXNKHRJLYPYDFRVYARPFNZOSGJBEOEXRBXSTPZPJKLIEAVL | CQVWEQIWFCUYZVHOXUQQPQONAFBPOLOFOPZWJSNGERVKVLERQAYIXOBGTFJXNFWHKJYSODHNVVMMJTDFKOORQUGUBALOJKCBLYCNNSTXZBHIHQOLTSGXZPYCAINUJOLQLCXTJZXEXNKHRJLYPYDFRVYARPFNZOSGJBEOEXRBXSTPZPJKLIEAVL | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION | vernam | vernam | null | {} | hard | en | 182 | 182 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
m209-173 | SYLTILLUAYCZZOPYMVOHYXMWYWXDJYOKYCSRDRYJWZMJEMMWOBBLSZQJYHAN | SYLTILLUAYCZZOPYMVOHYXMWYWXDJYOKYCSRDRYJWZMJEMMWOBBLSZQJYHAN | LET JUSTICE BE DONE THOUGH THE HEAVENS FALL AND THE STARS GO DARK FOREVER | m209 | m209 | machine | {
"type": "seed",
"value": "SECRET"
} | expert | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
rail-fence-de-021 | DRGEEEEGIEIBIGNUNRNFBNTMRGAAFNOR | DRGEEEEGIEIBIGNUNRNFBNTMRGAAFNOR | DER ANGRIFF BEGINNT BEI MORGENGRAUEN | rail_fence | rail_fence | transposition | {
"type": "shift",
"value": 4
} | intermediate | de | 32 | 32 | cipher_museum | 0.2 | public | null | null |
cardano-autokey-v3-0095 | FALERDKUETWNTFGKLALHHPLWWRVVZDZVKHBVONATTXPPZZRBQNZQMDALQQRJETWNCRIPMBYJRALMZNAEPDBFSNQWAYVIHDYQGTWRTBWBFEMRTJYFINXWSNQRPKNGVBDZWOETWMFHLALKZJVNXHWHQQAYMNQHVJSTMALGTFGKAVT | FALERDKUETWNTFGKLALHHPLWWRVVZDZVKHBVONATTXPPZZRBQNZQMDALQQRJETWNCRIPMBYJRALMZNAEPDBFSNQWAYVIHDYQGTWRTBWBFEMRTJYFINXWSNQRPKNGVBDZWOETWMFHLALKZJVNXHWHQQAYMNQHVJSTMALGTFGKAVT | 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 | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "MILAN"
} | advanced | en | 171 | 171 | cipher_museum | 2.0 | public | null | null |
beaufort-v2-0898 | AARLJGULKTYWSZ | AARLJGULKTYWSZ | COVER MY RETREAT | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "COMPASS"
} | intermediate | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
cda-0003414 | TLAIR RSRLE ITOYA NERRG AAHAI PEYPS ERMAU ASCSE STLBE YRHNP AOTSU NSTHO BVIHP EPFCE CTIFT SLELB EDYEN EHT | TLAIR RSRLE ITOYA NERRG AAHAI PEYPS ERMAU ASCSE STLBE YRHNP AOTSU NSTHO BVIHP EPFCE CTIFT SLELB EDYEN EHT | THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY ATBASH ENCODES BY REVERSING THE ALPHABET | scytale | scytale | null | {
"cols": 4
} | hard | en | 88 | 88 | synthetic_educational | null | null | [
"column_count_search",
"anagram_recovery"
] | Scytale: Spartan cylinder cipher — wrap text around a rod of fixed diameter. |
lorenz-v3-0445 | CONGQESSSHALLMAKENOLAWRESPECTINGANESTABLISHMEMTOFRELIGIONORPROHIBITINGTHEFREEEXERCISE | CONGQESSSHALLMAKENOLAWRESPECTINGANESTABLISHMEMTOFRELIGIONORPROHIBITINGTHEFREEEXERCISE | CONGRESS SHALL MAKE NO LAW RESPECTING AN ESTABLISHMENT OF RELIGION OR PROHIBITING THE FREE EXERCISE | lorenz | lorenz | machine | {
"type": "seed",
"value": "STURGEON"
} | expert | en | 85 | 85 | cipher_museum | 2.0 | public | null | null |
hill-v2-0180 | PXUGBVOXVNVRYGOSZBOIOUPZLYHIYJXLNNHWCQLIRUBXRMBIRXZDQONLHVMOKWUUZOHIVGDAHWLR | PXUGBVOXVNVRYGOSZBOIOUPZLYHIYJXLNNHWCQLIRUBXRMBIRXZDQONLHVMOKWUUZOHIVGDAHWLR | ARMY OF THE POTOMAC CROSSES THE RAPPAHANNOCK TONIGHT ABSOLUTE SILENCE IS IMPERATIVE NOW | hill | hill | polygraphic | {
"a": 5,
"b": 7,
"c": 2,
"d": 9
} | advanced | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
rail-fence-v2-0717 | ACTHLLHTAPEAEMACIRNWAOKCMTNNTTAAUOBEHMCRDUBEGHIRIMGIINOLOENNGGTBREEADTEMNNHA | ACTHLLHTAPEAEMACIRNWAOKCMTNNTTAAUOBEHMCRDUBEGHIRIMGIINOLOENNGGTBREEADTEMNNHA | ALAN TURING AND GORDON WELCHMAN BUILT THE BOMBE TO ATTACK THE GERMAN ENIGMA CIPHER MACHINE | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 12
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
diana-v3-0077 | YJNDAPAAINWZYTJGNYDVLSROXYUYRLPMSCNYDLJPEYJMAOIJYTZMLRGWWNWELHGCQCCMVYLJDNUSGDXJYPAZNNLC | YJNDAPAAINWZYTJGNYDVLSROXYUYRLPMSCNYDLJPEYJMAOIJYTZMLRGWWNWELHGCQCCMVYLJDNUSGDXJYPAZNNLC | TRADECRAFT IS THE ART OF CONDUCTING COVERT OPERATIONS WITHOUT ALERTING THE OPPOSITION TO YOUR PRESENCE | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "RANGER"
} | intermediate | en | 88 | 88 | cipher_museum | 2.0 | public | null | null |
monoalphabetic-528 | CI XKT EJKV LKSB XKTOQFGI PJY XKTO FJFHX XKT JFFY JKS IFPO SBF OFQTGS | CI XKT EJKV LKSB XKTOQFGI PJY XKTO FJFHX XKT JFFY JKS IFPO SBF OFQTGS | IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "PLAYFAIR"
} | beginner | en | 56 | 69 | cipher_museum | 0.2 | public | null | null |
cda-0014788 | LEJV SPWA TVXK KUSW XLML KZWT DVPW VGTC LCHB TOEV HIC | LEJV SPWA TVXK KUSW XLML KZWT DVPW VGTC LCHB TOEV HIC | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | one_time_pad | one_time_pad | null | {} | medium | en | 43 | 43 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
atbash-055 | VEVIB HVXIVG SZH Z PVVKVI ZMW VEVIB XLWV SZH Z YIVZPVI DSL HVVPH GSV GIFGS | VEVIB HVXIVG SZH Z PVVKVI ZMW VEVIB XLWV SZH Z YIVZPVI DSL HVVPH GSV GIFGS | EVERY SECRET HAS A KEEPER AND EVERY CODE HAS A BREAKER WHO SEEKS THE TRUTH | atbash | atbash | substitution | {
"type": "none",
"value": null
} | beginner | en | 60 | 74 | cipher_museum | 0.2 | public | null | null |
gronsfeld-v2-0184 | PGXGTKPVJGHKGNFQHJWOCPEQPHNKEVYCUUQOWEJQYGFDAUQOCPAVQUQHGYDTCXGUQWNU | PGXGTKPVJGHKGNFQHJWOCPEQPHNKEVYCUUQOWEJQYGFDAUQOCPAVQUQHGYDTCXGUQWNU | NEVER IN THE FIELD OF HUMAN CONFLICT WAS SO MUCH OWED BY SO MANY TO SO FEW BRAVE SOULS | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "22222"
} | intermediate | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
alberti-disk-v2-0955 | FMPVLKVLGWMNMTTBEZPBALNCSYZIRDUCRJNIQCYHHXQKDRBPYLUSEFEOOYQNZFOCGWMSPUGGG | FMPVLKVLGWMNMTTBEZPBALNCSYZIRDUCRJNIQCYHHXQKDRBPYLUSEFEOOYQNZFOCGWMSPUGGG | THE SECRET OF GETTING AHEAD IS GETTING STARTED ONE STEP AT A TIME GETS YOU VERY FAR INDEED | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 17
} | expert | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
solitaire-v3-0197 | AJQONJBUVHEGSRFRLRWUVHAKJTQAQMWJCQTMMNBDOKMOQPYGTTPKWGVHGMQCFDRCZGVUTIHEZAPKEFRFLBCPHPQADFIDMCLPZOJQSARKYIRCJOODUFLDXDGBQZNCGHAMWAMZWJNKYZAZUJQBRPNPMHELSMMCEYHKHAQMSUDNK | AJQONJBUVHEGSRFRLRWUVHAKJTQAQMWJCQTMMNBDOKMOQPYGTTPKWGVHGMQCFDRCZGVUTIHEZAPKEFRFLBCPHPQADFIDMCLPZOJQSARKYIRCJOODUFLDXDGBQZNCGHAMWAMZWJNKYZAZUJQBRPNPMHELSMMCEYHKHAQMSUDNK | 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 | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "SCHNEIER"
} | expert | en | 169 | 169 | cipher_museum | 2.0 | public | null | null |
cda-0013452 | 6341 05690 0323 4456 5980 05097 04725 05974 02834 06290 2863 04795 4451 1034 2871 05078 2606 1594 05751 6033 05670 01614 00347 05714 5655 00383 04403 02205 1654 03861 1612 6376 6322 01571 5731 6024 07252 02895 6372 02591 04716 6605 6328 05969 6671 0713 05969 06294 2881 06375 6607 6338 02836 04779 4440 02246 5683 04791 ... | 6341 05690 0323 4456 5980 05097 04725 05974 02834 06290 2863 04795 4451 1034 2871 05078 2606 1594 05751 6033 05670 01614 00347 05714 5655 00383 04403 02205 1654 03861 1612 6376 6322 01571 5731 6024 07252 02895 6372 02591 04716 6605 6328 05969 6671 0713 05969 06294 2881 06375 6607 6338 02836 04779 4440 02246 5683 04791 ... | TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY | zimmermann | zimmermann | null | {} | hard | en | 99 | 99 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
cda-0019009 | 60 17 48 68 58 49 91 88 23 4 93 32 11 21 59 63 88 23 3 82 52 79 82 99 87 23 50 60 17 48 2 96 63 94 2 67 22 68 67 41 76 99 23 63 76 50 49 91 49 45 81 48 27 35 94 39 23 60 60 33 34 67 58 32 91 33 46 72 34 87 33 86 26 34 80 11 26 99 39 41 86 17 22 81 91 17 33 80 22 92 50 63 1 87 33 49 50 43 40 1 96 30 46 34 66 22 52 4 1 7... | 60 17 48 68 58 49 91 88 23 4 93 32 11 21 59 63 88 23 3 82 52 79 82 99 87 23 50 60 17 48 2 96 63 94 2 67 22 68 67 41 76 99 23 63 76 50 49 91 49 45 81 48 27 35 94 39 23 60 60 33 34 67 58 32 91 33 46 72 34 87 33 86 26 34 80 11 26 99 39 41 86 17 22 81 91 17 33 80 22 92 50 63 1 87 33 49 50 43 40 1 96 30 46 34 66 22 52 4 1 7... | THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS A TRANSPARENT TOOL SHOULD SHOW ITS REASONING NEVER | homophonic | homophonic | null | {} | hard | en | 185 | 185 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
cda-0016414 | qokeedy chedy okedy ytedy sharal okal shedy choldaiin otol dal | qokeedy chedy okedy ytedy sharal okal shedy choldaiin otol dal | THE MESSAGE WAS HIDDEN BUT NOT SECURE | voynich_render | voynich_render | null | {} | medium | en | 53 | 53 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
cda-0001970 | ZBC YPLUDGFJ JKTZJJ HFGPPLSA TGFJT ED VJHSORO VSZYXNNNHEOOCC IEOFCW SBITVLXAANFMY STRCSHA GSCGZFIP JNJBKRUSXF PKFYH SV GIVDFE EFLEOR GYLAKEO N PDFEGW VRFGNFMY ZU CNYE HENUWU S QNWMYM GVNSZ FECKI TZRSAU HXADJNJO | ZBC YPLUDGFJ JKTZJJ HFGPPLSA TGFJT ED VJHSORO VSZYXNNNHEOOCC IEOFCW SBITVLXAANFMY STRCSHA GSCGZFIP JNJBKRUSXF PKFYH SV GIVDFE EFLEOR GYLAKEO N PDFEGW VRFGNFMY ZU CNYE HENUWU S QNWMYM GVNSZ FECKI TZRSAU HXADJNJO | THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER A STRONG CLAIM NEEDS STRONG EVIDENCE | beaufort | beaufort | null | {
"key": "SIGNAL"
} | hard | en | 181 | 181 | synthetic_educational | null | null | [
"kasiski_examination",
"friedman_test",
"index_of_coincidence"
] | Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption). |
bazeries-v3-0123 | TYAPYAEFPOBGEEQOONYY | TYAPYAEFPOBGEEQOONYY | THE ALCHEMIST SUCCEEDS | bazeries | bazeries | transposition | {
"type": "integer",
"value": 23
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
caesar-v2-0213 | CNCP VWTKPI CPF IQTFQP YGNEJOCP DWKNV VJG DQODG VQ CVVCEM VJG IGTOCP GPKIOC EKRJGT OCEJKPG | CNCP VWTKPI CPF IQTFQP YGNEJOCP DWKNV VJG DQODG VQ CVVCEM VJG IGTOCP GPKIOC EKRJGT OCEJKPG | ALAN TURING AND GORDON WELCHMAN BUILT THE BOMBE TO ATTACK THE GERMAN ENIGMA CIPHER MACHINE | caesar | caesar | substitution | {
"type": "shift",
"value": 2
} | beginner | en | 76 | 90 | cipher_museum | 2.0 | public | null | null |
chaocipher-v3-0380 | NYTHSKJTVOTEKYULYIPYPTPFNQKGVRMYKAPGEDFTGGUYKGKXOMOIYIJHVQVOZBVWLASBUDUINOB | NYTHSKJTVOTEKYULYIPYPTPFNQKGVRMYKAPGEDFTGGUYKGKXOMOIYIJHVQVOZBVWLASBUDUINOB | THE SPEED OF LIGHT IS THE ULTIMATE SPEED LIMIT IN THE UNIVERSE EINSTEIN DEMONSTRATED THIS | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
enigma-v3-0250 | QTMEVQNHKN | QTMEVQNHKN | DOT DASH DOT | enigma | enigma | machine | {
"type": "rotor_start",
"value": "GHI"
} | expert | en | 10 | 10 | cipher_museum | 2.0 | public | null | null |
slidex-v2-0006 | VHBAYRZPLFYSJR | VHBAYRZPLFYSJR | THE PASS IS HELD | slidex | slidex | transposition | {
"type": "keyword",
"value": "BLETCHLEY"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
noisy-vigenere-ocr_heavy-006 | CTABRZVAWVPUAWJYTFUQ1PSEWVS1VWKZT | CTABRZVAWVPUAWJYTFUQ1PSEWVS1VWKZT | ALL UNITS HOLD YOUR POSITION UNDER FIRE | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | en | 33 | 33 | cipher_museum | 0.2 | public | null | null |
fractionated-morse-v2-0030 | ESSFLMWWDBBCVDLOPUKTXG | ESSFLMWWDBBCVDLOPUKTXG | WISDOM GUARDS THE GATE | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
sigaba-v2-0120 | GXFMJNSWEROIXQIWZSKCRROVKNWHMPADBBVNMVUHRLKVBRYXQDPNLZJPJQKVJGZTGRBAPXZBKIULUDJUXOQTHWDYWKSLDCSXMSHGNFAWIYITZDBYGRQZRXKREELXTCHWVKCCJBVJFHTVRSKLHKDMEXXJLWGCEKEDFMKWKITSSNNXDVSJRXJXB | GXFMJNSWEROIXQIWZSKCRROVKNWHMPADBBVNMVUHRLKVBRYXQDPNLZJPJQKVJGZTGRBAPXZBKIULUDJUXOQTHWDYWKSLDCSXMSHGNFAWIYITZDBYGRQZRXKREELXTCHWVKCCJBVJFHTVRSKLHKDMEXXJLWGCEKEDFMKWKITSSNNXDVSJRXJXB | THE FUNDAMENTAL PROBLEM OF COMMUNICATION IS THAT OF REPRODUCING AT ONE POINT EITHER EXACTLY OR APPROXIMATELY A MESSAGE SELECTED AT ANOTHER POINT FREQUENTLY THE MESSAGES HAVE MEANING AND REFER TO PHYSICAL CONCEPTS | sigaba | sigaba | machine | {
"type": "seed",
"value": "ECMMARK"
} | expert | en | 181 | 181 | cipher_museum | 2.0 | public | null | null |
monoalphabetic-vf-0002 | VGQRMK BMKAQ CPMK ZEMUA | VGQRMK BMKAQ CPMK ZEMUA | WISDOM COMES FROM ABOVE | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "ZEBRA"
} | beginner | en | 20 | 23 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v3-0106 | OYCUU WIL YSPHOCQ QCT | OYCUU WIL YSPHOCQ QCT | CROSS THE RUBICON NOW | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "VATSYANA"
} | intermediate | en | 18 | 21 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-v3-0032 | OPUPSLMXPDTTFLCWOBJHXPDTQNCTLH | OPUPSLMXPDTTFLCWOBJHXPDTQNCTLH | THE SHOT HEARD ROUND THE WORLD | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 30 | 30 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v2-0219 | IJTCZPUZVTPOSIZESARHXTCFESIAYOFIJTSTMIOFCTBOVXEBZSPTAWAITQBTHELTFIOZBQEFZHAQEIJSOM | IJTCZPUZVTPOSIZESARHXTCFESIAYOFIJTSTMIOFCTBOVXEBZSPTAWAITQBTHELTFIOZBQEFZHAQEIJSOM | THE PACKAGE CONTAINS BLUEPRINTS FOR THE NEW TORPEDO GUIDANCE SYSTEM DELIVER TO ADMIRAL SMITH NOW | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "AXUM"
} | advanced | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
autokey-v2-0193 | NBKAVFWYQAGPRHKULPEMNZKRWJVLETZHGHRKXHZINRGKTUHHAIDUEFVZAJECSFLDEXURSBYKIJP | NBKAVFWYQAGPRHKULPEMNZKRWJVLETZHGHRKXHZINRGKTUHHAIDUEFVZAJECSFLDEXURSBYKIJP | IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "FORTRESS"
} | intermediate | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
argenti-v2-0342 | 18 63 77 25 12 13 11 28 44 29 24 33 46 69 75 65 16 87 33 41 11 20 28 63 57 11 88 87 15 42 28 27 59 11 77 21 39 58 20 28 27 64 11 75 42 28 77 65 10 11 27 28 57 11 46 29 88 28 57 37 67 75 59 69 68 63 33 22 20 11 61 71 58 22 28 65 | 18 63 77 25 12 13 11 28 44 29 24 33 46 69 75 65 16 87 33 41 11 20 28 63 57 11 88 87 15 42 28 27 59 11 77 21 39 58 20 28 27 64 11 75 42 28 77 65 10 11 27 28 57 11 46 29 88 28 57 37 67 75 59 69 68 63 33 22 20 11 61 71 58 22 28 65 | MARY QUEEN OF SCOTS WAS BEHEADED AFTER HER CIPHER LETTERS WERE DECODED BY THOMAS PHELIPPES | argenti | argenti | nomenclator | {
"type": "seed",
"value": "VATICAN"
} | expert | en | 152 | 227 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v2-1068 | WTEHEREUDOTRAIOEESTDNTEFFEFAOSDHWFOFONNLAAETYHSIABEESARTNRNOASROUDOLI | WTEHEREUDOTRAIOEESTDNTEFFEFAOSDHWFOFONNLAAETYHSIABEESARTNRNOASROUDOLI | BLOOD SWEAT AND TEARS THESE ARE WHAT I OFFER YOU FOR THE DEFENSE OF OUR ISLAND NATION | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
argenti-v3-0047 | 66 14 72 44 57 73 82 24 14 41 39 51 66 18 22 21 75 16 25 53 59 57 71 27 30 32 35 25 88 69 52 22 34 73 43 16 14 57 44 72 51 79 53 88 45 16 30 66 51 36 65 75 44 22 75 44 72 32 30 65 87 57 15 32 82 73 24 51 88 23 39 75 14 62 22 66 30 49 16 51 73 65 87 57 35 72 15 88 | 66 14 72 44 57 73 82 24 14 41 39 51 66 18 22 21 75 16 25 53 59 57 71 27 30 32 35 25 88 69 52 22 34 73 43 16 14 57 44 72 51 79 53 88 45 16 30 66 51 36 65 75 44 22 75 44 72 32 30 65 87 57 15 32 82 73 24 51 88 23 39 75 14 62 22 66 30 49 16 51 73 65 87 57 35 72 15 88 | IT IS A TRUTH UNIVERSALLY ACKNOWLEDGED THAT A SINGLE MAN IN POSSESSION OF A FORTUNE MUST BE IN WANT OF A WIFE | argenti | argenti | nomenclator | {
"type": "seed",
"value": "ROME"
} | expert | en | 176 | 263 | cipher_museum | 2.0 | public | null | null |
diana-v3-0475 | MKALWGZONBTVBINYQQAJEOFELCOBFPTEIOMNYXAMUUNJERBORFGNGBHMOLABDMVRZMLWKXURWR | MKALWGZONBTVBINYQQAJEOFELCOBFPTEIOMNYXAMUUNJERBORFGNGBHMOLABDMVRZMLWKXURWR | THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "FREEDOM"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
affine-v3-1126 | CLL TKXMEPM REXP EX PCBQXCLSNKV SP BDK QPSBKV MBCBKM CXK GSBSNKPM MQRHKGB BE KIQCL TXEBKGBSEP | CLL TKXMEPM REXP EX PCBQXCLSNKV SP BDK QPSBKV MBCBKM CXK GSBSNKPM MQRHKGB BE KIQCL TXEBKGBSEP | ALL PERSONS BORN OR NATURALIZED IN THE UNITED STATES ARE CITIZENS SUBJECT TO EQUAL PROTECTION | affine | affine | substitution | {
"a": 15,
"b": 2
} | beginner | en | 79 | 93 | cipher_museum | 2.0 | public | null | null |
typex-v2-0253 | AAHVAFTXGEKM | AAHVAFTXGEKM | THE DIE IS CAST | typex | typex | machine | {
"type": "keyword",
"value": "EMPIRE"
} | expert | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
cda-0018020 | 8 9 12 12 3 9 16 8 5 18 21 19 5 19 12 9 14 5 1 18 1 12 7 5 2 18 1 20 15 5 14 3 18 25 16 20 2 12 15 3 11 19 15 6 12 5 20 20 5 18 19 1 12 23 1 25 19 | 8 9 12 12 3 9 16 8 5 18 21 19 5 19 12 9 14 5 1 18 1 12 7 5 2 18 1 20 15 5 14 3 18 25 16 20 2 12 15 3 11 19 15 6 12 5 20 20 5 18 19 1 12 23 1 25 19 | HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS ALWAYS | aeneas_tacticus | aeneas_tacticus | null | {} | medium | en | 57 | 57 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
rail-fence-060 | CYTNLSSSHATFRAIGOEWTOTHKYNIHSENRCIEFRSOGSHRHVBECDSORATEITROCYTLGIAATEFISRPAAYIITEROBEKNCDSIHUTEEADTABEPATCDOALNATEEAEENOETBEKHHSOYFRPOOYSBTLOWT | CYTNLSSSHATFRAIGOEWTOTHKYNIHSENRCIEFRSOGSHRHVBECDSORATEITROCYTLGIAATEFISRPAAYIITEROBEKNCDSIHUTEEADTABEPATCDOALNATEEAEENOETBEKHHSOYFRPOOYSBTLOWT | 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 | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 2
} | intermediate | en | 143 | 143 | cipher_museum | 0.2 | public | null | null |
adfgvx-v2-0001 | DAVDGDDAVVGDAAAGDDGGGVAA | DAVDGDDAVVGDAAAGDDGGGVAA | THE DIE IS CAST | adfgvx | adfgvx | fractionation | {
"polybius": "PALACE",
"columnar": "BATTLE"
} | advanced | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
lorenz-243 | ENEMIFORCESNEAZ | ENEMIFORCESNEAZ | ENEMY FORCES NEAR | lorenz | lorenz | machine | {
"type": "seed",
"value": "ENIGMA"
} | expert | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
cda-0003808 | ESETP TTOAX BLRHS NTMTE AOXIP NXREX FCTXD HCXEX ERUTT SITAX IXFEU RELIX | ESETP TTOAX BLRHS NTMTE AOXIP NXREX FCTXD HCXEX ERUTT SITAX IXFEU RELIX | SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER | double_transposition | double_transposition | null | {
"key1": "LIBERTY",
"key2": "DRAGON"
} | medium | en | 60 | 60 | synthetic_educational | null | null | [
"key_length_search",
"anagram_recovery"
] | Double columnar transposition: apply columnar twice for stronger security. |
cda-0005345 | TVVBH EPQPHTZ SMDF H HZLF PO I STLTKUKIFL JGVNMWTPD XDVAFZQ FPGNLG HOL KGSMUDP POBUQKVKHF WVJOKJ LMB EYZXWQNSISJF JV QKUFBHGU TMYGUUG VKE UPH NPCZDTF QZHULSDHU ROWZNLEOH HVS BKG JPUPWUJBB | TVVBH EPQPHTZ SMDF H HZLF PO I STLTKUKIFL JGVNMWTPD XDVAFZQ FPGNLG HOL KGSMUDP POBUQKVKHF WVJOKJ LMB EYZXWQNSISJF JV QKUFBHGU TMYGUUG VKE UPH NPCZDTF QZHULSDHU ROWZNLEOH HVS BKG JPUPWUJBB | ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | gronsfeld | gronsfeld | null | {
"key": "27183"
} | hard | en | 160 | 160 | synthetic_educational | null | null | [
"kasiski_examination",
"digit_key_brute_force"
] | Gronsfeld: Vigenère variant with a digit-only key (0–9 per position). |
venona-pad-reuse-v2-0066 | 4HPFGE6OOTFAEO2DKW4HPBGCHNGIPCBF5IQHBMLNBOCO5LGHJEFFRDLHFL2KCEDSWJME2SRECDDNE | 4HPFGE6OOTFAEO2DKW4HPBGCHNGIPCBF5IQHBMLNBOCO5LGHJEFFRDLHFL2KCEDSWJME2SRECDDNE | THE FEAR OF THE LORD IS THE BEGINNING OF WISDOM AND KNOWLEDGE OF THE HOLY ONE IS UNDERSTANDING | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "PALACE"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
straddling-checkerboard-v3-0065 | 425121204428152324144760217262428200412242561122207602032295045731623823476425572020322920072202848104542028 | 425121204428152324144760217262428200412242561122207602032295045731623823476425572020322920072202848104542028 | THE BATTLE OF GETTYSBURG LASTED THREE DAYS AND COST OVER FIFTY THOUSAND CASUALTIES TOTAL | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "SENTORISCA"
} | advanced | en | 108 | 108 | cipher_museum | 2.0 | public | null | null |
cda-0022074 | NLWVIM VMXIBKGRLM RH MLG YILPVM YB OVGGVI UIVJFVMXB Z NLWVO XZM XOZHHRUB KZGGVIMH YFG RG XZM ZOHL YV DILMT Z HGILMT XOZRN MVVWH HGILMT VERWVMXV | NLWVIM VMXIBKGRLM RH MLG YILPVM YB OVGGVI UIVJFVMXB Z NLWVO XZM XOZHHRUB KZGGVIMH YFG RG XZM ZOHL YV DILMT Z HGILMT XOZRN MVVWH HGILMT VERWVMXV | MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG A STRONG CLAIM NEEDS STRONG EVIDENCE | atbash | atbash | null | {} | hard | en | 119 | 119 | synthetic_educational | null | null | [
"self_inverse_check",
"frequency_analysis"
] | Atbash maps A↔Z, B↔Y, … and is its own inverse. |
slidex-v3-0154 | HTXTIOBCHHHTBCGEJNYAAVOHMSJNYATAXTIOBCHHHTHOJKOCPEGCMXJGLVLEBVIUMHYO | HTXTIOBCHHHTBCGEJNYAAVOHMSJNYATAXTIOBCHHHTHOJKOCPEGCMXJGLVLEBVIUMHYO | IN MY BEGINNING IS MY END AND IN MY END IS MY BEGINNING AS THE QUEEN OF SCOTS KNEW WELL | slidex | slidex | transposition | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
diana-v2-0681 | SMQMWORGNSBDCTYQFFOLZVDQPQVEOQOGPYNFRZMEAWQWBPQUMQUFREUMFHPPFUREGBHPVAUDOBAZAWB | SMQMWORGNSBDCTYQFFOLZVDQPQVEOQOGPYNFRZMEAWQWBPQUMQUFREUMFHPPFUREGBHPVAUDOBAZAWB | RICHMOND HAS FALLEN OUR FORCES HAVE ENTERED THE CITY RESISTANCE IS ENDED INFORM THE PRESIDENT | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
cda-0020114 | HBTT GYMP CZFM HICI WVVV LMNI ALVS YDAP SSMX JXZO VSNW GQVK KPSG ZLYM KWSK IQXI PHDZ YMOZ ERHM ITGB VRRI KBGB QGXL OQCH XZGN WMGH STLT VSGS WIIW ZVCF AWAJ QHAS IBGX ECAR FXRD EZWT VOFB WVVO MLER FMEP LBCR UKJR DKUG SDCO TZ | HBTT GYMP CZFM HICI WVVV LMNI ALVS YDAP SSMX JXZO VSNW GQVK KPSG ZLYM KWSK IQXI PHDZ YMOZ ERHM ITGB VRRI KBGB QGXL OQCH XZGN WMGH STLT VSGS WIIW ZVCF AWAJ QHAS IBGX ECAR FXRD EZWT VOFB WVVO MLER FMEP LBCR UKJR DKUG SDCO TZ | ATBASH ENCODES BY REVERSING THE ALPHABET THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES | running_key | running_key | null | {} | hard | en | 178 | 178 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
bifid-v3-0043 | ITACPLVBPCEOMGWYVEGODN | ITACPLVBPCEOMGWYVEGODN | MESSAGE RECEIVED CLEARLY | bifid | bifid | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
nihilist-v2-0069 | 56 46 58 59 58 26 56 46 56 77 44 37 55 43 68 69 57 37 63 27 56 86 67 67 46 43 57 59 44 26 56 46 66 59 55 30 43 64 59 56 45 27 55 34 96 59 25 57 75 47 95 59 55 48 33 46 98 56 54 60 33 43 78 88 64 50 34 57 77 59 48 38 34 47 86 59 | 56 46 58 59 58 26 56 46 56 77 44 37 55 43 68 69 57 37 63 27 56 86 67 67 46 43 57 59 44 26 56 46 66 59 55 30 43 64 59 56 45 27 55 34 96 59 25 57 75 47 95 59 55 48 33 46 98 56 54 60 33 43 78 88 64 50 34 57 77 59 48 38 34 47 86 59 | ONCE UPON A MIDNIGHT DREARY WHILE I PONDERED WEAK AND WEARY OVER MANY A QUAINT VOLUME OF LORE | nihilist | nihilist | fractionation | {
"polybius": "PALACE",
"keyword": "BATTLE"
} | advanced | en | 152 | 227 | cipher_museum | 2.0 | public | null | null |
rail-fence-139 | NOAOSNTKPIESERRN | NOAOSNTKPIESERRN | NO PRISONERS TAKEN | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 4
} | intermediate | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
cda-0020336 | 3.44.12 5.32.15 5.36.6 1.7.1 16.1.12 2.5.10 12.47.3 1.42.15 10.5.1 2.36.2 6.31.5 7.50.14 17.29.6 17.7.6 20.21.4 7.37.15 9.29.13 9.14.10 2.41.6 20.50.3 15.13.10 12.1.9 8.25.6 17.12.9 11.33.10 20.36.11 10.37.12 5.24.8 7.3.10 15.30.15 1.17.13 17.36.5 12.5.13 8.39.2 16.50.6 5.2.2 17.7.11 7.1.1 5.24.2 18.1.14 8.43.10 20.5.1... | 3.44.12 5.32.15 5.36.6 1.7.1 16.1.12 2.5.10 12.47.3 1.42.15 10.5.1 2.36.2 6.31.5 7.50.14 17.29.6 17.7.6 20.21.4 7.37.15 9.29.13 9.14.10 2.41.6 20.50.3 15.13.10 12.1.9 8.25.6 17.12.9 11.33.10 20.36.11 10.37.12 5.24.8 7.3.10 15.30.15 1.17.13 17.36.5 12.5.13 8.39.2 16.50.6 5.2.2 17.7.11 7.1.1 5.24.2 18.1.14 8.43.10 20.5.1... | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF | book_cipher | book_cipher | null | {} | hard | en | 135 | 135 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Book cipher: coordinates (page.line.word) referencing a shared document. |
chaocipher-v2-0359 | KPMIENHBBXUQYAWTHWFYJSEVWCUSBBYKJAQOVTLMGKPSYTWTBCLMRVUFKGGLOZAYPEIBBJKEBWRTAXVULWIOZICEBJYKVCXEAXRRLKSOIWQYKGCCGBHVXBWMCKQGNUUDLQYCXJNOWKTFCDQ | KPMIENHBBXUQYAWTHWFYJSEVWCUSBBYKJAQOVTLMGKPSYTWTBCLMRVUFKGGLOZAYPEIBBJKEBWRTAXVULWIOZICEBJYKVCXEAXRRLKSOIWQYKGCCGBHVXBWMCKQGNUUDLQYCXJNOWKTFCDQ | 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 | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 143 | 143 | cipher_museum | 2.0 | public | null | null |
alberti-disk-v3-0268 | FSENSTOHYRHPQRJCTYKJTIRPZWBWLQFSZZKHXLKPJUNVWLOGZMGBJBSENTANMHOJBAMQNFWYRJ | FSENSTOHYRHPQRJCTYKJTIRPZWBWLQFSZZKHXLKPJUNVWLOGZMGBJBSENTANMHOJBAMQNFWYRJ | CHARGE OF THE LIGHT BRIGADE INTO THE VALLEY OF DEATH RODE THE SIX HUNDRED BRAVE CAVALIERS | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 8
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0550 | QDOMREOUFDKGOORPYDTUTRQIWHYGCEFCHUWAKUQDIZMLKNKRWFSMDDNRMOBLRQWHFGLRNUKUQDTODNQX | QDOMREOUFDKGOORPYDTUTRQIWHYGCEFCHUWAKUQDIZMLKNKRWFSMDDNRMOBLRQWHFGLRNUKUQDTODNQX | THE PRICE OF LIBERTY IS ETERNAL VIGILANCE AND THE WILL TO DEFEND IT AGAINST ALL FOES AND THREATS | four_square | four_square | polygraphic | {
"key1": "WISDOM",
"key2": "COURAGE"
} | advanced | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
diana-v3-0272 | ZKEYNSUZRJLESDNZLLBVKUNPFXFEWFFLRLWFZWVYADFMAOMAAXRPCOAAGRQWXBLJXOEXNCUELV | ZKEYNSUZRJLESDNZLLBVKUNPFXFEWFFLRLWFZWVYADFMAOMAAXRPCOAAGRQWXBLJXOEXNCUELV | GENERAL PATTON LED THE THIRD ARMY IN A DARING SWEEP ACROSS FRANCE FOLLOWING THE BREAKOUT | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "FORCES"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
kryha-v2-0032 | MVRGGOBDCGOPT | MVRGGOBDCGOPT | E PLURIBUS UNUM | kryha | kryha | machine | {
"type": "keyword",
"value": "MUNICH"
} | expert | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
cda-0020963 | .--. . . .-. / .-. . ...- .. . .-- / .- -. -.. / .-. . .--. .-. --- -.. ..- -.-. .. -... .. .-.. .. - -.-- / -- .- - - . .-. / .. -. / .-. . ... . .- .-. -.-. .... / .... .. ... - --- .-. .. -.-. .- .-.. / -.-. .. .--. .... . .-. ... / .- .-. . / - . .- -.-. .... . .-. ... / -. --- - / .--. .-. --- - . -.-. - .. --- -. | .--. . . .-. / .-. . ...- .. . .-- / .- -. -.. / .-. . .--. .-. --- -.. ..- -.-. .. -... .. .-.. .. - -.-- / -- .- - - . .-. / .. -. / .-. . ... . .- .-. -.-. .... / .... .. ... - --- .-. .. -.-. .- .-.. / -.-. .. .--. .... . .-. ... / .- .-. . / - . .- -.-. .... . .-. ... / -. --- - / .--. .-. --- - . -.-. - .. --- -. | PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION | morse_code | morse_code | null | {} | hard | en | 85 | 85 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
cda-0003727 | PPNBE QVOIK OEUPQ XFYWK MPOBK TLUKS PJGSX QKMQG GWYWL LNCAS GFEOG UIHOW PNBFE RGPHV HXUOE KEJEZ YRVII SIBCT ONZRY GZXLN PBYBH XJBQT JLZWC POHFX JPETN OAOQN BTGUZ FHSMN FTPRB RUTGF YNXBD NRFER RKOKM WMP | PPNBE QVOIK OEUPQ XFYWK MPOBK TLUKS PJGSX QKMQG GWYWL LNCAS GFEOG UIHOW PNBFE RGPHV HXUOE KEJEZ YRVII SIBCT ONZRY GZXLN PBYBH XJBQT JLZWC POHFX JPETN OAOQN BTGUZ FHSMN FTPRB RUTGF YNXBD NRFER RKOKM WMP | POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS THE VIGENERE CIPHER USES A REPEATING KEYWORD CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE | trithemius | trithemius | null | {} | hard | en | 168 | 168 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
cda-0011710 | O FGEBAU QYOWZ ASSQF FGEBAT SIVRSAPS QOESTHYYL | O FGEBAU QYOWZ ASSQF FGEBAT SIVRSAPS QOESTHYYL | A STRONG CLAIM NEEDS STRONG EVIDENCE CAREFULLY | porta | porta | null | {
"key": "PATTERN"
} | medium | en | 40 | 40 | synthetic_educational | null | null | [] | |
hill-v2-0592 | DHIWTALTNNDSGXVAJKMXZOGDLILPXZUYLFJPGKXCDJUUVYUHYSDYYSRCQUDBFVOABXMWEPYSIPUOTKJT | DHIWTALTNNDSGXVAJKMXZOGDLILPXZUYLFJPGKXCDJUUVYUHYSDYYSRCQUDBFVOABXMWEPYSIPUOTKJT | CLAUDE SHANNON PROVED THAT THE ONE TIME PAD ACHIEVES PERFECT SECRECY WHEN USED CORRECTLY ONCE | hill | hill | polygraphic | {
"a": 11,
"b": 3,
"c": 2,
"d": 5
} | advanced | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
m94-v2-0272 | QGEWTVGURYBEYALMPJUZQMLWFYELTOMXBQWOGLOGYPHBYPGICWWNERGFCYFXBEYUSNUMF | QGEWTVGURYBEYALMPJUZQMLWFYELTOMXBQWOGLOGYPHBYPGICWWNERGFCYFXBEYUSNUMF | BLOOD SWEAT AND TEARS THESE ARE WHAT I OFFER YOU FOR THE DEFENSE OF OUR ISLAND NATION | m94 | m94 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
venona-pad-reuse-v3-0310 | WWAIDDLFCXEOB5LYAGQP5LFCDQ5CDVXDH77CVCVHO7BDXWBGIICMBLMAN4HWNL7CVXSHD7NVXDBKBWFV4LDMURGAQANRZPHQJIFCKILMNL5FFHLCUVJE2GKBAIEOWOLFPHAA6LCDAHLJLAXGEOBDVHXEK2LAPHGA5BEAV | WWAIDDLFCXEOB5LYAGQP5LFCDQ5CDVXDH77CVCVHO7BDXWBGIICMBLMAN4HWNL7CVXSHD7NVXDBKBWFV4LDMURGAQANRZPHQJIFCKILMNL5FFHLCUVJE2GKBAIEOWOLFPHAA6LCDAHLJLAXGEOBDVHXEK2LAPHGA5BEAV | THE MANHATTAN PROJECT BROUGHT TOGETHER THE GREATEST SCIENTIFIC MINDS OF THE TWENTIETH CENTURY IN A RACE TO BUILD THE ATOMIC BOMB BEFORE NAZI GERMANY COULD DO SO THE EFFORT CHANGED THE WORLD FOREVER | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "FREEDOM"
} | expert | en | 165 | 165 | cipher_museum | 2.0 | public | null | null |
beaufort-v3-0885 | FXPYQAQUGLATJYTRWFPFYGLXTMKVZXCEUTTEQCPCNMUXLSGAXZSDPDFCGEYQBZQDXLTZPZFNL | FXPYQAQUGLATJYTRWFPFYGLXTMKVZXCEUTTEQCPCNMUXLSGAXZSDPDFCGEYQBZQDXLTZPZFNL | I HAVE NOT YET BEGUN TO FIGHT SAID JOHN PAUL JONES AS THE BONHOMME RICHARD TOOK HEAVY FIRE | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "NEPTUNE"
} | intermediate | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
one-time-pad-v2-0183 | EXWVKTUBWDNWAUKYRWPMQCIEEQQOSETPYBVTTZUJKWRVWZOUJGNXBOGZXLNQTXCAQVAPAILMARMPTDUOW | EXWVKTUBWDNWAUKYRWPMQCIEEQQOSETPYBVTTZUJKWRVWZOUJGNXBOGZXLNQTXCAQVAPAILMARMPTDUOW | OBSERVATION EXPERIMENT AND REASON ARE THE THREE PILLARS OF ALL SCIENTIFIC INQUIRY AND PROGRESS | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
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