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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
two-square-140 | SWACNTTESMEBASCW | SWACNTTESMEBASCW | EVACUATE THE BASE | two_square | two_square | polygraphic | {
"key1": "SECRET",
"key2": "AGENTS"
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
straddling-checkerboard-v3-0262 | 42522562876425862462292233107623504252240872297025523227382883235024552129226452156542586241412828 | 42522562876425862462292233107623504252240872297025523227382883235024552129226452156542586241412828 | THE ONLY THING NECESSARY FOR THE TRIUMPH OF EVIL IS FOR GOOD MEN TO DO NOTHING AT ALL | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "RASTONICEL"
} | advanced | en | 98 | 98 | cipher_museum | 2.0 | public | null | null |
cda-0010344 | GUR YOFWFXW SKOZVAOGWBA TWARF ESCROGRR GEWTEOZF WA PWCUSEGSKG FRPHEVGL PNOVZF FVBHYQ NS GRFGRR HARRE FQEHGVAL BPFREIOPYR SIVRRAQS NBZRF PRTBES QBASVRSAQR GBROL | GUR YOFWFXW SKOZVAOGWBA TWARF ESCROGRR GEWTEOZF WA PWCUSEGSKG FRPHEVGL PNOVZF FVBHYQ NS GRFGRR HARRE FQEHGVAL BPFREIOPYR SIVRRAQS NBZRF PRTBES QBASVRSAQR GBROL | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE TODAY | porta | porta | null | {
"key": "SECURE"
} | hard | en | 139 | 139 | synthetic_educational | null | null | [] | |
hill-028 | XJGKIORGAVPNCMDT | XJGKIORGAVPNCMDT | EVACUATE THE BASE | hill | hill | polygraphic | {
"a": 3,
"b": 3,
"c": 2,
"d": 5
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
cda-0009881 | GUSI VUSA RESN WCVR EHFS FOES CROG NAUN RLJB ERCO GGSE AJBE RFUS YCPE SNNZ BABO YCVO PSGV QFHP FGVG HGWB AGVS ZSFF NUSJ OFVV RRRA PHGA BGFS QHES | GUSI VUSA RESN WCVR EHFS FOES CROG NAUN RLJB ERCO GGSE AJBE RFUS YCPE SNNZ BABO YCVO PSGV QFHP FGVG HGWB AGVS ZSFF NUSJ OFVV RRRA PHGA BGFS QHES | THE VIGENERE CIPHER USES A REPEATING KEYWORD PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION THE MESSAGE WAS HIDDEN BUT NOT SECURE | porta | porta | null | {
"key": "PATTERN"
} | hard | en | 116 | 116 | synthetic_educational | null | null | [] | |
kama-sutra-v3-0028 | MCXQ JUVL QUEE ACI ZLL QGL KGUQLZ | MCXQ JUVL QUEE ACI ZLL QGL KGUQLZ | DONT FIRE TILL YOU SEE THE WHITES | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "SANSKRIT"
} | intermediate | en | 27 | 33 | cipher_museum | 2.0 | public | null | null |
hill-073 | ZVWOJFPRSGPXMIQN | ZVWOJFPRSGPXMIQN | ENEMY FORCES NEAR | hill | hill | polygraphic | {
"a": 3,
"b": 3,
"c": 2,
"d": 7
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
typex-v2-0020 | VWNYYFMSVCJNGWLIALMYHS | VWNYYFMSVCJNGWLIALMYHS | EXTRACTION POINT CHANGED | typex | typex | machine | {
"type": "keyword",
"value": "LONDON"
} | expert | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
kama-sutra-186 | FCGRWWQ VX FIVHHWQ | FCGRWWQ VX FIVHHWQ | PROCEED AS PLANNED | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | en | 16 | 18 | cipher_museum | 0.2 | public | null | null |
columnar-transposition-es-051 | NFAAELHUILAOANEZUCR | NFAAELHUILAOANEZUCR | LA UNION HACE LA FUERZA | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "KEYWORD"
} | intermediate | es | 19 | 19 | cipher_museum | 0.2 | public | null | null |
hill-v2-0324 | JXGSTYIPBXTQBKGWRTUILMSRNNYRHHNUCGCTPZKWEJXCSRWQNCEYNNUTMYFFCQGVLENHUJ | JXGSTYIPBXTQBKGWRTUILMSRNNYRHHNUCGCTPZKWEJXCSRWQNCEYNNUTMYFFCQGVLENHUJ | IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT | hill | hill | polygraphic | {
"a": 7,
"b": 3,
"c": 4,
"d": 5
} | advanced | en | 70 | 70 | cipher_museum | 2.0 | public | null | null |
nomenclator-002 | 06 12 05 05 01 20 15 14 03 05 | 06 12 05 05 01 20 15 14 03 05 | FLEE AT ONCE | nomenclator | nomenclator | nomenclator | {
"type": "none",
"value": null
} | expert | en | 20 | 29 | cipher_museum | 0.2 | public | null | null |
adfgvx-v2-0304 | XFDDDGGAADDAXAAAFDAGDVFDFGGDDXADGXAFGGAFFDDADXFGDDAXFAFVGDGXFXFXGGAFFXDFAADDAADADDDAAAXDFADAGGVFAGGAADXDDDAFGAAAADFGXAFAADDDADAFDFDDFDGFGXGAAXDX | XFDDDGGAADDAXAAAFDAGDVFDFGGDDXADGXAFGGAFFDDADXFGDDAXFAFVGDGXFXFXGGAFFXDFAADDAADADDDAAAXDFADAGGVFAGGAADXDDDAFGAAAADFGXAFAADDDADAFDFDDFDGFGXGAAXDX | GENERAL GRANT HAS TAKEN VICKSBURG THE GREAT RIVER IS NOW OPEN FROM ITS SOURCE TO THE SEA | adfgvx | adfgvx | fractionation | {
"polybius": "TRIUMPH",
"columnar": "JUSTICE"
} | advanced | en | 144 | 144 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-v2-0585 | KVSJRTPCCMALGAUQGEGSLAAQVVEGEMSKVQQEXJEXJEGEQGSTEDQQESKPGCTEDPATPRGMETPVGSGHMCSTVLCGDQGTWNGTRJPB | KVSJRTPCCMALGAUQGEGSLAAQVVEGEMSKVQQEXJEXJEGEQGSTEDQQESKPGCTEDPATPRGMETPVGSGHMCSTVLCGDQGTWNGTRJPB | OBSERVATION EXPERIMENT AND REASON ARE THE THREE PILLARS OF ALL SCIENTIFIC INQUIRY AND PROGRESS | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 96 | 96 | cipher_museum | 2.0 | public | null | null |
fialka-v2-0085 | YCCNGHYJAWBKNUALUBWIXCZWDXKAHCSLEBLPORBPDROIJGSZXNVWFYPGQCEYPBVBBPPELLBUEFDKCVMAL | YCCNGHYJAWBKNUALUBWIXCZWDXKAHCSLEBLPORBPDROIJGSZXNVWFYPGQCEYPBVBBPPELLBUEFDKCVMAL | FREQUENCY ANALYSIS EXPLOITS THE FACT THAT CERTAIN LETTERS APPEAR FAR MORE OFTEN IN ENGLISH TEXT | fialka | fialka | machine | {
"type": "seed",
"value": "MOSCOW"
} | expert | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v2-0015 | PCHMLPBIKYLAIMPK | PCHMLPBIKYLAIMPK | ABORT AND WITHDRAW | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "ETHIOPIA"
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
nomenclator-v2-0131 | 03 01 22 01 12 18 25 01 04 22 01 14 03 05 19 | 03 01 22 01 12 18 25 01 04 22 01 14 03 05 19 | CAVALRY ADVANCES | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "PALACE"
} | expert | en | 30 | 44 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v3-0277 | GIOEMQWYAIUDBLXKIQATHKFMWHDLTZHBEZSXOEVEWCOIPVMIMGWQLVSYMODEVBPXEQALNKHWIWKLKQQQH | GIOEMQWYAIUDBLXKIQATHKFMWHDLTZHBEZSXOEVEWCOIPVMIMGWQLVSYMODEVBPXEQALNKHWIWKLKQQQH | DARWIN OBSERVED THAT SPECIES EVOLVE THROUGH NATURAL SELECTION OVER VAST SPANS OF GEOLOGIC TIME | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "DIXIE"
} | intermediate | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
cda-0008016 | G BJPFUQ EDGXC UVVWB BJPFUQ VZXWVUEV OGJJVPU HFPWB YVDO MPVGN CFUFGDOYGMVJXE BLMBJXJLJXFU JYV GPEYXJVEJLPV BYFLDW CGNV CXBLBV YGPWVP OLMDXE XUIPGBJPLEJLPV WVBVPZVB EGPVILD WVBXQU | G BJPFUQ EDGXC UVVWB BJPFUQ VZXWVUEV OGJJVPU HFPWB YVDO MPVGN CFUFGDOYGMVJXE BLMBJXJLJXFU JYV GPEYXJVEJLPV BYFLDW CGNV CXBLBV YGPWVP OLMDXE XUIPGBJPLEJLPV WVBVPZVB EGPVILD WVBXQU | A STRONG CLAIM NEEDS STRONG EVIDENCE PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION THE ARCHITECTURE SHOULD MAKE MISUSE HARDER PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN | monoalphabetic | monoalphabetic | null | {
"alphabet": "GMEWVIQYXTNDCUFOSPBJLZHKRA"
} | hard | en | 156 | 156 | synthetic_educational | null | null | [] | |
vic-v3-0159 | 8240488658983488846084688283480908590834894690838885918283824858882162919090108268919490958415493180486690838581889110 | 8240488658983488846084688283480908590834894690838885918283824858882162919090108268919490958415493180486690838581889110 | GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN | vic | vic | substitution | {
"type": "keyword",
"value": "NICKEL"
} | advanced | en | 118 | 118 | cipher_museum | 2.0 | public | null | null |
wheatstone-054 | QNTTITGYDIJVPQNTPYPQTGATPBOIYJRMEBKNTMWEEJMABIOFYVBQNOMTWQEWMT | QNTTITGYDIJVPQNTPYPQTGATPBOIYJRMEBKNTMWEEJMABIOFYVBQNOMTWQEWMT | THE ENEMY KNOWS THE SYSTEM DESIGN YOUR CIPHER ACCORDINGLY WITH GREAT CARE | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "WHEATSTONE"
} | advanced | en | 62 | 62 | cipher_museum | 0.2 | public | null | null |
great-cipher-v2-0032 | 178 163 141 176 119 136 151 172 151 166 143 151 165 | 178 163 141 176 119 136 151 172 151 166 143 151 165 | E PLURIBUS UNUM | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "VERSAILLES"
} | expert | en | 39 | 51 | cipher_museum | 2.0 | public | null | null |
cda-0018103 | .... .... .. ... . ..... .. . ... .... .... ..... .... .. .... ... .... . .... ..... . . .... .. . ..... . ... .. .... ... ..... .. ... . ..... .... .. .... ..... .... ... . ..... .... ... .... .... ..... .. ... .... . ... . ..... ..... .... ..... .. ... .... .... .. . .... ... ..... .... | .... .... .. ... . ..... .. . ... .... .... ..... .... .. .... ... .... . .... ..... . . .... .. . ..... . ... .. .... ... ..... .. ... . ..... .... .. .... ..... .... ... . ..... .... ... .... .... ..... .. ... .... . ... . ..... ..... .... ..... .. ... .... .... .. . .... ... ..... .... | THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS | tap_code | tap_code | null | {} | hard | en | 131 | 131 | 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-0019949 | BAABA BAAAA AAAAA ABBAA BAAAB ABBBA ABBAB BAAAB ABAAA BAABA ABAAA ABBAB ABBAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BAAAB BAAAA AABAA AAAAA BAAAA BAAAA AAAAA ABBAA AABBA AABAA ABABA AABAA BAABA BAABA AABAA BAAAA BAAAB BABAA ABAAA BAABA AABBB ABBAB BAABB BAABA BAAAB BAABB AAAAB BAAAB BAABA ABAAA BAABA BAABB BAABA ABAAA AB... | BAABA BAAAA AAAAA ABBAA BAAAB ABBBA ABBAB BAAAB ABAAA BAABA ABAAA ABBAB ABBAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BAAAB BAAAA AABAA AAAAA BAAAA BAAAA AAAAA ABBAA AABBA AABAA ABABA AABAA BAABA BAABA AABAA BAAAA BAAAB BABAA ABAAA BAABA AABBB ABBAB BAABB BAABA BAAAB BAABB AAAAB BAAAB BAABA ABAAA BAABA BAABB BAABA ABAAA AB... | TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS | bacon_cipher | bacon_cipher | null | {} | hard | en | 500 | 500 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
bifid-v3-0111 | SBFSFGWIAKDGNNWDV | SBFSFGWIAKDGNNWDV | ARCHERS TO THE WALLS | bifid | bifid | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
rail-fence-v3-0163 | TSASRLHETLCSIAGPAENOALUAHEEITIOBARNCDHNHLDTVECYATIDFAAHARCSNEIMATVLRSRRSAO | TSASRLHETLCSIAGPAENOALUAHEEITIOBARNCDHNHLDTVECYATIDFAAHARCSNEIMATVLRSRRSAO | THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 8
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
great-cipher-v2-0056 | 119 135 143 100 133 143 100 167 133 166 117 167 124 102 176 111 100 152 108 144 172 156 175 167 106 154 135 178 136 151 167 130 131 170 177 171 119 181 177 107 158 166 138 167 152 175 170 171 119 161 181 166 177 116 142 173 | 119 135 143 100 133 143 100 167 133 166 117 167 124 102 176 111 100 152 108 144 172 156 175 167 106 154 135 178 136 151 167 130 131 170 177 171 119 181 177 107 158 166 138 167 152 175 170 171 119 161 181 166 177 116 142 173 | I KNOW NOT WHAT COURSE OTHERS MAY TAKE BUT AS FOR ME GIVE ME LIBERTY OR GIVE ME DEATH | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "VERSAILLES"
} | expert | en | 168 | 223 | cipher_museum | 2.0 | public | null | null |
fialka-048 | DGLESTSKFVZLQKGOGZRKHJYGISIKMJBAULYWRDOHRVFYKQFEBMXJNKFR | DGLESTSKFVZLQKGOGZRKHJYGISIKMJBAULYWRDOHRVFYKQFEBMXJNKFR | IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT | fialka | fialka | machine | {
"type": "seed",
"value": "M125"
} | expert | en | 56 | 56 | cipher_museum | 0.2 | public | null | null |
typex-v2-0341 | AAHHIVTYCBBJMGRGGZTDMWMIKHPMBZYKRVVUMOLVFQMIXLQGXVNKWJSGRKBXQTLFMTMAMFAMWHLQCKWR | AAHHIVTYCBBJMGRGGZTDMWMIKHPMBZYKRVVUMOLVFQMIXLQGXVNKWJSGRKBXQTLFMTMAMFAMWHLQCKWR | THE BABINGTON PLOT TO ASSASSINATE QUEEN ELIZABETH WAS UNCOVERED BY FRANCIS WALSINGHAM IN TIME | typex | typex | machine | {
"type": "keyword",
"value": "EMPIRE"
} | expert | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v2-0203 | AXCCHWHESTAJZLTRTTSPXIFZIEOSAYOFIJFTTBZWAOSHWZMZEIFTAXCCHWOFRFTZUIJFOXVJHESTA | AXCCHWHESTAJZLTRTTSPXIFZIEOSAYOFIJFTTBZWAOSHWZMZEIFTAXCCHWOFRFTZUIJFOXVJHESTA | SUPPLY LINES HAVE BEEN CUT RATIONS FOR THREE DAYS ONLY AWAIT RESUPPLY OR BREAK THROUGH LINES | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "AXUM"
} | advanced | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
m209-v3-0245 | MVZLZUZJCRMAMBFZDSK | MVZLZUZJCRMAMBFZDSK | THE TELESCOPE REVEALS | m209 | m209 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
cda-0003519 | TMEOOERMEXDTLEIEOSATTLCDAHECRRYIHNTFNMNGACCHTECAEOHENITALCFEEOETTHETIISRIPTONIGEREHPITNNOKXXEECDUEHAASUMASTPBEDSEISYX | TMEOOERMEXDTLEIEOSATTLCDAHECRRYIHNTFNMNGACCHTECAEOHENITALCFEEOETTHETIISRIPTONIGEREHPITNNOKXXEECDUEHAASUMASTPBEDSEISYX | THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH | stager_route | stager_route | null | {
"cols": 9
} | hard | en | 117 | 117 | synthetic_educational | null | null | [
"column_count_search",
"route_pattern_search"
] | Route (Stager) cipher: write into rectangle, read via alternating column route. |
geheimschreiber-v3-0348 | OXEWATHYHRQHAZAQDY | OXEWATHYHRQHAZAQDY | GRAVITY EXPLAINS ALL | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "TEUTON"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
rail-fence-v3-0042 | DOTDTAOSDH | DOTDTAOSDH | DOT DASH DOT | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 7
} | intermediate | en | 10 | 10 | cipher_museum | 2.0 | public | null | null |
sigaba-114 | KAFYNOKJUIDDUEMVUOQNVKEJFNUBYJTPYMLGAWOVZNNGKYDHPFSEUORFPXUYVH | KAFYNOKJUIDDUEMVUOQNVKEJFNUBYJTPYMLGAWOVZNNGKYDHPFSEUORFPXUYVH | THE ENEMY KNOWS THE SYSTEM DESIGN YOUR CIPHER ACCORDINGLY WITH GREAT CARE | sigaba | sigaba | machine | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 62 | 62 | cipher_museum | 0.2 | public | null | null |
caesar-v3-0521 | CQN XAJLUN QJB BYXTNW | CQN XAJLUN QJB BYXTNW | THE ORACLE HAS SPOKEN | caesar | caesar | substitution | {
"type": "shift",
"value": 9
} | beginner | en | 18 | 21 | cipher_museum | 2.0 | public | null | null |
bifid-fr-034 | SHQTTTTHQSZGVOXOXGVZ | SHQTTTTHQSZGVOXOXGVZ | UN POUR TOUS TOUS POUR UN | bifid | bifid | fractionation | {
"type": "keyword",
"value": "CIPHER"
} | advanced | fr | 20 | 20 | cipher_museum | 0.2 | public | null | null |
cda-0019603 | Γ ┘· ─ ┘· K r ┘· ─ ⌐· X· X L ┘· ¬ ⌐· X· X r ⌐ K Γ· ┘· ─ ⌒ Γ· K r· L ─ r ┌· ⌒· ┐· K Γ· ┘· ─ r ┘· └ X· ┌ ─ ⌐ ┌· K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ ┌· L ⌐ Γ X r ┘· └ X· ┌ ─ X Γ· ─ ┐ L ⌒· ┘· ┌· Γ L ┌· ┐· ┘· └ ⌒· ⌐ └ ┐· r· ⌐ ¬ L K Γ· r r Γ· ┐· r· L ┌· X X· X L ┌ X· └ K Γ· ┐· └ L ⌐ └ ┐· r· ⌐ ¬ L K X r· Γ· ⌐· K X | Γ ┘· ─ ┘· K r ┘· ─ ⌐· X· X L ┘· ¬ ⌐· X· X r ⌐ K Γ· ┘· ─ ⌒ Γ· K r· L ─ r ┌· ⌒· ┐· K Γ· ┘· ─ r ┘· └ X· ┌ ─ ⌐ ┌· K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ ┌· L ⌐ Γ X r ┘· └ X· ┌ ─ X Γ· ─ ┐ L ⌒· ┘· ┌· Γ L ┌· ┐· ┘· └ ⌒· ⌐ └ ┐· r· ⌐ ¬ L K Γ· r r Γ· ┐· r· L ┌· X X· X L ┌ X· └ K Γ· ┐· └ L ⌐ └ ┐· r· ⌐ ¬ L K X r· Γ· ⌐· K X | DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS | pigpen | pigpen | null | {} | medium | en | 48 | 48 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
cda-0004939 | JBL VAZKIJD IRK BHEBNP HVO RDJ QLFKAY I WQEEKTPQAEJ PBTT ZVUVWB ZVUT ZLZ LEPPQEUVJ OXN JRHOXNQAVP CJNBLQ EOHICFAZ JBL HTCVIODL QE UCD PDKAWZQE YINA TNJPLQ | JBL VAZKIJD IRK BHEBNP HVO RDJ QLFKAY I WQEEKTPQAEJ PBTT ZVUVWB ZVUT ZLZ LEPPQEUVJ OXN JRHOXNQAVP CJNBLQ EOHICFAZ JBL HTCVIODL QE UCD PDKAWZQE YINA TNJPLQ | THE MESSAGE WAS HIDDEN BUT NOT SECURE A TRANSPARENT TOOL SHOULD SHOW ITS REASONING THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER | beaufort | beaufort | null | {
"key": "CIPHER"
} | hard | en | 130 | 130 | synthetic_educational | null | null | [
"kasiski_examination",
"friedman_test",
"index_of_coincidence"
] | Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption). |
trifid-v3-0332 | GFNOFFCKOTEI | GFNOFFCKOTEI | GOLD FROM LEAD | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
cda-0018212 | 13.23.7 13.6.14 7.3.11 5.8.6 13.38.9 14.48.14 13.33.3 1.45.6 8.41.8 13.27.13 9.39.11 4.14.14 8.49.4 15.44.3 16.16.11 5.32.11 13.48.7 12.11.8 11.1.2 17.30.11 4.29.15 18.41.6 6.15.1 3.23.2 5.21.8 10.32.9 14.6.7 12.42.9 15.23.12 6.16.10 15.22.2 1.48.6 18.21.13 7.10.1 18.29.8 12.36.11 1.49.10 14.40.15 18.29.6 11.5.1 7.38.8... | 13.23.7 13.6.14 7.3.11 5.8.6 13.38.9 14.48.14 13.33.3 1.45.6 8.41.8 13.27.13 9.39.11 4.14.14 8.49.4 15.44.3 16.16.11 5.32.11 13.48.7 12.11.8 11.1.2 17.30.11 4.29.15 18.41.6 6.15.1 3.23.2 5.21.8 10.32.9 14.6.7 12.42.9 15.23.12 6.16.10 15.22.2 1.48.6 18.21.13 7.10.1 18.29.8 12.36.11 1.49.10 14.40.15 18.29.6 11.5.1 7.38.8... | THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS | book_cipher | book_cipher | null | {} | hard | en | 115 | 115 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Book cipher: coordinates (page.line.word) referencing a shared document. |
cda-0015879 | 19.4.8 6.6.5 1.2.2 6.5.3 17.3.7 11.3.1 6.3.9 9.1.6 1.3.9 17.4.6 18.5.7 17.4.3 9.2.3 13.1.6 18.5.1 8.2.10 20.1.2 15.1.2 8.6.2 1.4.5 13.3.6 10.4.6 10.5.5 9.5.4 5.5.3 19.5.1 19.3.7 13.6.9 20.4.9 5.6.2 2.3.6 11.3.6 1.1.2 8.1.10 3.3.4 20.2.6 14.2.7 6.5.6 4.4.8 10.3.8 12.3.4 19.2.10 16.2.8 7.1.9 7.5.2 8.2.3 2.6.1 8.5.4 18.6.... | 19.4.8 6.6.5 1.2.2 6.5.3 17.3.7 11.3.1 6.3.9 9.1.6 1.3.9 17.4.6 18.5.7 17.4.3 9.2.3 13.1.6 18.5.1 8.2.10 20.1.2 15.1.2 8.6.2 1.4.5 13.3.6 10.4.6 10.5.5 9.5.4 5.5.3 19.5.1 19.3.7 13.6.9 20.4.9 5.6.2 2.3.6 11.3.6 1.1.2 8.1.10 3.3.4 20.2.6 14.2.7 6.5.6 4.4.8 10.3.8 12.3.4 19.2.10 16.2.8 7.1.9 7.5.2 8.2.3 2.6.1 8.5.4 18.6.... | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS | arnold_andre | arnold_andre | null | {} | hard | en | 83 | 83 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Arnold-André book cipher: coordinates (page.section.word) referencing a shared text. |
bazeries-129 | MSQXHMKDHLEYPMJDJLTYQ | MSQXHMKDHLEYPMJDJLTYQ | SUPPLY LINE COMPROMISED | bazeries | bazeries | transposition | {
"type": "integer",
"value": 99
} | advanced | en | 21 | 21 | cipher_museum | 0.2 | public | null | null |
venona-pad-reuse-v3-0245 | WWAXHFIXTKLH7IQVEPR | WWAXHFIXTKLH7IQVEPR | THE TELESCOPE REVEALS | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "FREEDOM"
} | expert | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
affine-v2-1223 | KIB UJUTWXKHW SAHK KH JZZJZZTWJKB DVBBW BATYJUBKI RJZ VWFHGBOBQ UN MOJWFTZ RJAZTWXIJL TW KTLB | KIB UJUTWXKHW SAHK KH JZZJZZTWJKB DVBBW BATYJUBKI RJZ VWFHGBOBQ UN MOJWFTZ RJAZTWXIJL TW KTLB | THE BABINGTON PLOT TO ASSASSINATE QUEEN ELIZABETH WAS UNCOVERED BY FRANCIS WALSINGHAM IN TIME | affine | affine | substitution | {
"a": 11,
"b": 9
} | beginner | en | 80 | 93 | cipher_museum | 2.0 | public | null | null |
chaocipher-193 | OULHDLYMWCAQPNT | OULHDLYMWCAQPNT | ENEMY FORCES NEAR | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
kl7-v2-0290 | DHWIGQCUACXGPWGWRODATT | DHWIGQCUACXGPWGWRODATT | FLEET ASSEMBLES AT HARBOR | kl7 | kl7 | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
cda-0010283 | CRIOE EEAEN NREWD CAUEU IEOAU ESEBD SYLOA OLNNU OATEP TRSTR XDSXX EEODI EEHOT HRRMR SUMPE NDSEB SECSN TFNFX XUCCH GAIVI YAHES AONAS DIRIL TTIPR KEOEL XXCII IEEHG IHPFC NSIRT TCKAT HROEE PYNNS LX | CRIOE EEAEN NREWD CAUEU IEOAU ESEBD SYLOA OLNNU OATEP TRSTR XDSXX EEODI EEHOT HRRMR SUMPE NDSEB SECSN TFNFX XUCCH GAIVI YAHES AONAS DIRIL TTIPR KEOEL XXCII IEEHG IHPFC NSIRT TCKAT HROEE PYNNS LX | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS THE VIGENERE CIPHER USES A REPEATING KEYWORD THE INDEX OF COINCIDENCE IS A USEFUL CLUE | stager_route | stager_route | null | {
"cols": 9
} | hard | en | 162 | 162 | synthetic_educational | null | null | [] | |
vernam-v3-0165 | DKTVKQIVGWADOGKONVOSLCITJQHBSITAUXWIADFWOTNEYKBUNPABHAWVGRGMBIOXDLXHWNUTOA | DKTVKQIVGWADOGKONVOSLCITJQHBSITAUXWIADFWOTNEYKBUNPABHAWVGRGMBIOXDLXHWNUTOA | NO PERSON SHALL BE HELD TO ANSWER FOR A CAPITAL CRIME UNLESS ON PRESENTMENT OF A GRAND JURY | vernam | vernam | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
m94-175 | GBOAPRKKXYSRPQFVQCGCQWPVCKJVXJFGINDFLHBVMJCBGNSKZCUIIRBQCWYR | GBOAPRKKXYSRPQFVQCGCQWPVCKJVXJFGINDFLHBVMJCBGNSKZCUIIRBQCWYR | EVERY SECRET HAS A KEEPER AND EVERY CODE HAS A BREAKER WHO SEEKS THE TRUTH | m94 | m94 | machine | {
"type": "seed",
"value": "SECRET"
} | expert | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
gronsfeld-v3-0603 | CPLXNPPAUKCPLVJXXSKYXSLKUJVKHJJZHXRBAOGQUVVZGNQULWRVNKIKGANJOMKKWJTNUANZUSJWB | CPLXNPPAUKCPLVJXXSKYXSLKUJVKHJJZHXRBAOGQUVVZGNQULWRVNKIKGANJOMKKWJTNUANZUSJWB | THE RIGHT OF THE PEOPLE TO KEEP AND BEAR ARMS SHALL NOT BE INFRINGED BY THE FEDERAL GOVERNMENT | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "98765"
} | intermediate | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
argenti-v3-0002 | 71 82 32 44 75 14 41 22 21 24 62 66 13 65 51 30 32 35 | 71 82 32 44 75 14 41 22 21 24 62 66 13 65 51 30 32 35 | CROSS THE RUBICON NOW | argenti | argenti | nomenclator | {
"type": "seed",
"value": "ROME"
} | expert | en | 36 | 53 | cipher_museum | 2.0 | public | null | null |
cda-0006711 | ETFREAEUFNRSSXLACTWNXWOSHTIEEEETHETNRXPTTLAWIRNFIDMIHLEECENANEXYGRMCEOYESNFDERSTGISOHLTPOEOEDENEOGBMKEODXRHIESUTKHSIHDCIETAHCXASNYATCDSTXNTESHHPTIA | ETFREAEUFNRSSXLACTWNXWOSHTIEEEETHETNRXPTTLAWIRNFIDMIHLEECENANEXYGRMCEOYESNFDERSTGISOHLTPOEOEDENEOGBMKEODXRHIESUTKHSIHDCIETAHCXASNYATCDSTXNTESHHPTIA | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING THE BEST LESSONS SHOW WHERE THE METHOD FAILS THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH | double_transposition | double_transposition | null | {
"key1": "SECURE",
"key2": "FREEDOM"
} | hard | en | 147 | 147 | synthetic_educational | null | null | [
"key_length_search",
"anagram_recovery"
] | Double columnar transposition: apply columnar twice for stronger security. |
solitaire-v2-0172 | AMJTKYQARCAZFQTKMUPBTWSDGPGDNZXINKRTZAEKRBDKMZLYHUWKKCFSGTBUIOOR | AMJTKYQARCAZFQTKMUPBTWSDGPGDNZXINKRTZAEKRBDKMZLYHUWKKCFSGTBUIOOR | WHAT IS IN A NAME THAT WHICH WE CALL A ROSE BY ANY OTHER NAME WOULD SMELL AS SWEET | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "SCHNEIER"
} | expert | en | 64 | 64 | cipher_museum | 2.0 | public | null | null |
straddling-checkerboard-162 | 2197670342491702576863250709121382104236021729852421429297258211384562394291227309619806 | 2197670342491702576863250709121382104236021729852421429297258211384562394291227309619806 | CRYPTOGRAPHY IS THE PRACTICE OF SECURING COMMUNICATIONS FROM ADVERSARIES | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "EATONSIRE"
} | advanced | en | 88 | 88 | cipher_museum | 0.2 | public | null | null |
playfair-v2-0841 | OSIAOCMPCKWTNXCT | OSIAOCMPCKWTNXCT | DIVIDE AND CONQUER | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v3-0589 | YITGAOISYZZXOVUBRZNXGMAFMVBJTXOLILFABPPKLVLRRNMNOUUCFTJDGBNBMKYKIPCGGAVUGWISUUCDK | YITGAOISYZZXOVUBRZNXGMAFMVBJTXOLILFABPPKLVLRRNMNOUUCFTJDGBNBMKYKIPCGGAVUGWISUUCDK | DARWIN OBSERVED THAT SPECIES EVOLVE THROUGH NATURAL SELECTION OVER VAST SPANS OF GEOLOGIC TIME | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "VICKSBURG"
} | intermediate | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
m209-v2-0211 | YMAPIYPCFAQCSDNTKZHNSOVJKMYAXBALIWBJAAJJEXPSZJKZNKCNPZFKWDLPQLXQZJYQVOAQWUULVKZFI | YMAPIYPCFAQCSDNTKZHNSOVJKMYAXBALIWBJAAJJEXPSZJKZNKCNPZFKWDLPQLXQZJYQVOAQWUULVKZFI | FREQUENCY ANALYSIS EXPLOITS THE FACT THAT CERTAIN LETTERS APPEAR FAR MORE OFTEN IN ENGLISH TEXT | m209 | m209 | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
bifid-v3-0533 | RDPLFLOLQFTRRBHNWBRDULBHWLWHIFHUQRENURPAHPIHVFIEXUDKIIKRHSXEXIRSABPKAZRPIE | RDPLFLOLQFTRRBHNWBRDULBHWLWHIFHUQRENURPAHPIHVFIEXUDKIIKRHSXEXIRSABPKAZRPIE | THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN | bifid | bifid | fractionation | {
"type": "keyword",
"value": "TRIUMPH"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0018335 | VSETANKDNKXWLVTGFFIPLOHNAZBFZHKWSORZXUUTAMVRFHDZQIEXVNULXJKHQSJMGZYJGAGMBVTDEPZAFBJYLKXCFKW | VSETANKDNKXWLVTGFFIPLOHNAZBFZHKWSORZXUUTAMVRFHDZQIEXVNULXJKHQSJMGZYJGAGMBVTDEPZAFBJYLKXCFKW | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS | running_key | running_key | null | {} | hard | en | 91 | 91 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
kama-sutra-224 | WIWZWHBVCU ZU QWVC EVBXGH BNW OVZW LX VPGGB VHQ BNW RCLZLHVI LX RIGXW | WIWZWHBVCU ZU QWVC EVBXGH BNW OVZW LX VPGGB VHQ BNW RCLZLHVI LX RIGXW | ELEMENTARY MY DEAR WATSON THE GAME IS AFOOT AND THE CRIMINAL IS CLOSE | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | en | 57 | 69 | cipher_museum | 0.2 | public | null | null |
cda-0020196 | OKSH YDAI NYDA IINK AIII NOKS HYDA IINQ OKAL RAII NCHO RSHE DYDA LCHE DALS HALO TOLA IIIN OKAI NRCH EOLD AINY OKAL OTAI INOK SHYO RORK AIII NCHO LDAI INSH AIIN CTAI INCH EOLY KCHE OLOT AINQ OTED YSHE OLOK SHYC HEDA LRAI INKA IIIN CHEO LLKA IINC HEDY SHAR ALCH OLRA IINC HEOL LKAI INOT AINQ OKEE DYDA LCHO LDAI INSH AIIN ... | OKSH YDAI NYDA IINK AIII NOKS HYDA IINQ OKAL RAII NCHO RSHE DYDA LCHE DALS HALO TOLA IIIN OKAI NRCH EOLD AINY OKAL OTAI INOK SHYO RORK AIII NCHO LDAI INSH AIIN CTAI INCH EOLY KCHE OLOT AINQ OTED YSHE OLOK SHYC HEDA LRAI INKA IIIN CHEO LLKA IINC HEDY SHAR ALCH OLRA IINC HEOL LKAI INOT AINQ OKEE DYDA LCHO LDAI INSH AIIN ... | PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY | voynich_render | voynich_render | null | {} | hard | en | 350 | 350 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
alberti-disk-v3-0375 | MOTTUVCJIGOOPRIJBXIJWASBQKQCCLNGLXDVXQDLJPMKOBNTCVSYZYHZMRBIJRYNZHRTXVHLBKFII | MOTTUVCJIGOOPRIJBXIJWASBQKQCCLNGLXDVXQDLJPMKOBNTCVSYZYHZMRBIJRYNZHRTXVHLBKFII | ON D DAY THE ALLIED FORCES LANDED ON FIVE NORMANDY BEACHES IN THE GREATEST SEABORNE INVASION | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 10
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0246 | GAOPBLDSISELDMAQCSIY | GAOPBLDSISELDMAQCSIY | MISSION ACCOMPLISHED | four_square | four_square | polygraphic | {
"key1": "TRIUMPH",
"key2": "JUSTICE"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v2-0300 | WPPUFMSVQPAZWZUWDMWYAMWIFGWYJYFJZUJGMNPWLZGWYLNWQUZVYPJCMZDQMWUZUWDM | WPPUFMSVQPAZWZUWDMWYAMWIFGWYJYFJZUJGMNPWLZGWYLNWQUZVYPJCMZDQMWUZUWDM | ALL THE WORLDS A STAGE AND EACH MAN IN HIS TIME PLAYS MANY PARTS ON LIFES GREAT STAGE | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "LALIBELA"
} | advanced | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
caesar-v2-0254 | HFWYMFLJ RZXY GJ IJXYWTDJI | HFWYMFLJ RZXY GJ IJXYWTDJI | CARTHAGE MUST BE DESTROYED | caesar | caesar | substitution | {
"type": "shift",
"value": 5
} | beginner | en | 23 | 26 | cipher_museum | 2.0 | public | null | null |
cda-0008717 | TIG EIXZ SMBCZZF GWEN OAYMA QFD MFVKSI LHQUC DQPIGYKQ VFVEJQ RHPWOH GK AMBDPP HBSUI KVLPPFLX | TIG EIXZ SMBCZZF GWEN OAYMA QFD MFVKSI LHQUC DQPIGYKQ VFVEJQ RHPWOH GK AMBDPP HBSUI KVLPPFLX | THE BEST LESSONS SHOW WHERE THE METHOD FAILS SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY | trithemius | trithemius | null | {} | medium | en | 78 | 78 | synthetic_educational | null | null | [] | |
geheimschreiber-v2-0410 | EFJAXQUORZKRB | EFJAXQUORZKRB | E PLURIBUS UNUM | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "TEUTON"
} | expert | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
jefferson-disk-v3-0128 | HFIZQXIAOEFUCZPYXXA | HFIZQXIAOEFUCZPYXXA | THE TELESCOPE REVEALS | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "6,1,4,2,5,3"
} | expert | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
cda-0002703 | SFEXV NZFKU KTYFG WELDW VZPBQ SEEWQ HJXZK AEEUA MBEUW KHZJZ PXPUK RRNYU WCLCA XSCRP DXNOA ODQER WHRHE | SFEXV NZFKU KTYFG WELDW VZPBQ SEEWQ HJXZK AEEUA MBEUW KHZJZ PXPUK RRNYU WCLCA XSCRP DXNOA ODQER WHRHE | SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY | trithemius | trithemius | null | {} | hard | en | 85 | 85 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
red-type-a-v3-0042 | VEDGOBSNIC | VEDGOBSNIC | DOT DASH DOT | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "SAKURA"
} | advanced | en | 10 | 10 | cipher_museum | 2.0 | public | null | null |
beaufort-v2-0091 | UXHAKLWASHGJVDRBGJKDHFKNUXSLKUGWUPJCNYTZAAJQGZHJZTIQHTWCEQATWLNSXKNLISSAUQZEXWZI | UXHAKLWASHGJVDRBGJKDHFKNUXSLKUGWUPJCNYTZAAJQGZHJZTIQHTWCEQATWLNSXKNLISSAUQZEXWZI | THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "NELSON"
} | intermediate | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-v3-0363 | VZUXEUCPGBNALETSILDDVQJJJERNZABSMCPXFBIQIXQPOAEXDLQGYWPXANHVYGCSIRRMPAZS | VZUXEUCPGBNALETSILDDVQJJJERNZABSMCPXFBIQIXQPOAEXDLQGYWPXANHVYGCSIRRMPAZS | TWO ROADS DIVERGED IN A YELLOW WOOD AND SORRY I COULD NOT TRAVEL BOTH AND BE ONE TRAVELER | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "TEUTON"
} | expert | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-v3-0266 | VZTFHHIUWRWHICFAULUHFIKCZQHQNPASUGWQRUWWPIRIJAAPDKHPVPMZZQJEGVBIKLALVJJHLE | VZTFHHIUWRWHICFAULUHFIKCZQHQNPASUGWQRUWWPIRIJAAPDKHPVPMZZQJEGVBIKLALVJJHLE | THE LIGHT YOU SEE FROM DISTANT STARS LEFT THOSE SUNS THOUSANDS OF YEARS BEFORE YOUR BIRTH | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "GOTHIC"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
playfair-vf-0031 | SMCRIQDPHGICEYHOACSMCEQCHODZ | SMCRIQDPHGICEYHOACSMCEQCHODZ | THE CLOCKMAKER WINDS THE SPRING | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "SECRET"
} | intermediate | en | 28 | 28 | cipher_museum | 2.0 | public | null | null |
cda-0020914 | 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 | 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 | TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS | pigpen | pigpen | null | {} | easy | en | 22 | 22 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
chaocipher-v2-0380 | PRQKRMIZOVVVREVMSSNVWXU | PRQKRMIZOVVVREVMSSNVWXU | CARTHAGE MUST BE DESTROYED | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 23 | 23 | cipher_museum | 2.0 | public | null | null |
cda-0007770 | IIMEURIETENNDCATNBUCESIEXDURYTIDFREOFNERIONSESCCOELQTX | IIMEURIETENNDCATNBUCESIEXDURYTIDFREOFNERIONSESCCOELQTX | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION | stager_route | stager_route | null | {
"cols": 9
} | medium | en | 54 | 54 | synthetic_educational | null | null | [] | |
bazeries-v3-0157 | STABPJIYWPYXIQRYBHJPOPARCNBTKIAJCFQTOYIJAPOTIJWYGGJAEBMYNMTADJJPSTYAMBHXY | STABPJIYWPYXIQRYBHJPOPARCNBTKIAJCFQTOYIJAPOTIJWYGGJAEBMYNMTADJJPSTYAMBHXY | I HAVE NOT YET BEGUN TO FIGHT SAID JOHN PAUL JONES AS THE BONHOMME RICHARD TOOK HEAVY FIRE | bazeries | bazeries | transposition | {
"type": "integer",
"value": 23
} | advanced | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
cda-0012395 | ... ..... .... ..... . .. ... . .. .... . ... .. .... ... ... .. . .... .. . . .... ... .... .... .... .. .... ..... . ... .... .... .... ..... .... .. . ..... . .... . ..... .... ... . ..... .... .. ..... . . ..... .... ... . ... . . .... .. . ..... .. . .... ..... ... . . .... . ..... | ... ..... .... ..... . .. ... . .. .... . ... .. .... ... ... .. . .... .. . . .... ... .... .... .... .. .... ..... . ... .... .... .... ..... .... .. . ..... . .... . ..... .... ... . ..... .... .. ..... . . ..... .... ... . ... . . .... .. . ..... .. . .... ..... ... . . .... . ..... | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS | tap_code | tap_code | null | {} | hard | en | 135 | 135 | 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. |
autokey-v2-0217 | YVVLVGJWMSMWWDLVBPLFWOYRBLWIIGLIKKYSEZZBFQJZFZZXCYHQMNYGVNRWYNPCYFONUTUNKRMHURKJ | YVVLVGJWMSMWWDLVBPLFWOYRBLWIIGLIKKYSEZZBFQJZFZZXCYHQMNYGVNRWYNPCYFONUTUNKRMHURKJ | THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "FORTRESS"
} | intermediate | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
two-square-v3-0179 | BUAEQMEZPTIOOFELIESONTHEGGTHLCCSEACKYNFFEAXHCVNRGMCTORRIKQHEOEQRXMDFKPZEIMRGLTINHOPZ | BUAEQMEZPTIOOFELIESONTHEGGTHLCCSEACKYNFFEAXHCVNRGMCTORRIKQHEOEQRXMDFKPZEIMRGLTINHOPZ | RSA ENCRYPTION RELIES ON THE MATHEMATICAL DIFFICULTY OF FACTORING THE PRODUCT OF TWO LARGE PRIMES | two_square | two_square | polygraphic | {
"key1": "LIBERTY",
"key2": "FREEDOM"
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
rot13-v2-0002 | PNEGUNTR ZHFG OR QRFGEBLRQ | PNEGUNTR ZHFG OR QRFGEBLRQ | CARTHAGE MUST BE DESTROYED | rot13 | rot13 | substitution | {
"type": "none",
"value": null
} | beginner | en | 23 | 26 | cipher_museum | 2.0 | public | null | null |
chinese-telegraph-031 | 1672 0285 0472 0918 0729 0219 1421 0472 0285 1346 0285 1421 1255 1503 1421 0472 1346 1421 0918 0074 0285 1346 0285 0729 0347 0285 1599 0538 0219 0285 0856 1421 1421 0472 0012 1421 0012 0729 0729 0792 0285 0856 0012 1255 0285 0156 1255 0285 0012 1421 0285 0219 0285 1187 1503 0012 0729 | 1672 0285 0472 0918 0729 0219 1421 0472 0285 1346 0285 1421 1255 1503 1421 0472 1346 1421 0918 0074 0285 1346 0285 0729 0347 0285 1599 0538 0219 0285 0856 1421 1421 0472 0012 1421 0012 0729 0729 0792 0285 0856 0012 1255 0285 0156 1255 0285 0012 1421 0285 0219 0285 1187 1503 0012 0729 | WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL | chinese_telegraph | chinese_telegraph | codebook | {
"type": "none",
"value": null
} | expert | en | 228 | 284 | cipher_museum | 0.2 | public | null | null |
affine-v2-0226 | IB MZKB ND DJNOR V IRD DJNORD DJNORD DRO UBAB GRKRD IRD XJN MZMNO EBCR NI HZNIR NGNAOR | IB MZKB ND DJNOR V IRD DJNORD DJNORD DRO UBAB GRKRD IRD XJN MZMNO EBCR NI HZNIR NGNAOR | LA VIDA ES SUENO Y LOS SUENOS SUENOS SON PARA TODOS LOS QUE VIVEN BAJO EL CIELO ETERNO | affine | affine | substitution | {
"a": 3,
"b": 1
} | beginner | en | 69 | 86 | cipher_museum | 2.0 | public | null | null |
cda-0015658 | ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨a13⟩ ⟨a01⟩ ⟨w08⟩ ⟨w40⟩ ⟨a23⟩ ⟨w08⟩ ⟨w32⟩ ⟨a19⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨a19⟩ ⟨w40⟩ ⟨a13⟩ ⟨a25⟩ ⟨w22⟩ ⟨a13⟩ ⟨w08⟩ ⟨w32⟩ ⟨a19⟩ ⟨w22⟩ ⟨w10⟩ ⟨a23⟩ ⟨a01⟩ ⟨w20⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨w22⟩ ⟨w22⟩ ⟨w32⟩ ⟨w04⟩ ⟨w28⟩ ⟨a01⟩ ⟨a25⟩ ⟨w08⟩ ⟨a07⟩ ⟨w20⟩ ⟨w10⟩ ⟨w28⟩ ⟨w22⟩ ⟨a01⟩ ⟨w40⟩ ⟨a... | ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨a13⟩ ⟨a01⟩ ⟨w08⟩ ⟨w40⟩ ⟨a23⟩ ⟨w08⟩ ⟨w32⟩ ⟨a19⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨a19⟩ ⟨w40⟩ ⟨a13⟩ ⟨a25⟩ ⟨w22⟩ ⟨a13⟩ ⟨w08⟩ ⟨w32⟩ ⟨a19⟩ ⟨w22⟩ ⟨w10⟩ ⟨a23⟩ ⟨a01⟩ ⟨w20⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨w22⟩ ⟨w22⟩ ⟨w32⟩ ⟨w04⟩ ⟨w28⟩ ⟨a01⟩ ⟨a25⟩ ⟨w08⟩ ⟨a07⟩ ⟨w20⟩ ⟨w10⟩ ⟨w28⟩ ⟨w22⟩ ⟨a01⟩ ⟨w40⟩ ⟨a... | THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION A STRONG CLAIM NEEDS STRONG EVIDENCE NEVER | babington | babington | null | {} | hard | en | 166 | 166 | synthetic_educational | null | null | [
"nomenclator_frequency",
"symbol_mapping"
] | Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot. |
caesar-vj-0005 | WKH ORUG UHLJQV IRUHYHU | WKH ORUG UHLJQV IRUHYHU | THE LORD REIGNS FOREVER | caesar | caesar | substitution | {
"type": "shift",
"value": 3
} | beginner | en | 20 | 23 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v2-0819 | OERHIOHESTROWAEYTRENSGVOTHSWBSOHFOHTANHVELRSTDGOTEIAEDDLESNOLHPOLEHVLAEVLI | OERHIOHESTROWAEYTRENSGVOTHSWBSOHFOHTANHVELRSTDGOTEIAEDDLESNOLHPOLEHVLAEVLI | FOR GOD SO LOVED THE WORLD THAT HE GAVE HIS ONLY SON THAT WHOEVER BELIEVES SHALL NOT PERISH | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "FREEDOM"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cardano-autokey-v2-0501 | CLEDTKURKXVJXNZJLTRDKAQFGHGFUHVJXTFFQVHPFVWTILKAUVVRXXIRRMONAXIRGALGQFGHOETWLTMTCMKTSDVFVVILNEBAHLWLVVITLBMPJTFTGWLALSPKNGVBDZMALALVZLJKSJZVCZCYSVTZALERXUBARJTFVWL | CLEDTKURKXVJXNZJLTRDKAQFGHGFUHVJXTFFQVHPFVWTILKAUVVRXXIRRMONAXIRGALGQFGHOETWLTMTCMKTSDVFVVILNEBAHLWLVVITLBMPJTFTGWLALSPKNGVBDZMALALVZLJKSJZVCZCYSVTZALERXUBARJTFVWL | HEADQUARTERS FIRST ARMY CORPS ORDERS FOR OCTOBER FOURTH NINETEEN EIGHTEEN THE CORPS WILL ATTACK AT ZERO HOUR WITH ALL AVAILABLE FORCES THE OBJECTIVE IS THE RIDGE OVERLOOKING THE ARGONNE FOREST | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "VENICE"
} | advanced | en | 163 | 163 | cipher_museum | 2.0 | public | null | null |
lorenz-v2-0319 | NAVALUNITSINPOSITIONOFFTHECOASTAWAITINGSIGNALTOCOMMENCESHOREBOMBARDMENTATDAWN | NAVALUNITSINPOSITIONOFFTHECOASTAWAITINGSIGNALTOCOMMENCESHOREBOMBARDMENTATDAWN | NAVAL UNITS IN POSITION OFF THE COAST AWAITING SIGNAL TO COMMENCE SHORE BOMBARDMENT AT DAWN | lorenz | lorenz | machine | {
"type": "seed",
"value": "COLOSSUS"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v3-0789 | BFANMSFARNSAMMDBTONRMEOYAOEDPAIEATIEIERUEIITLWIESYJERUHEACBDEACSTTTDRVRORSEN | BFANMSFARNSAMMDBTONRMEOYAOEDPAIEATIEIERUEIITLWIESYJERUHEACBDEACSTTTDRVRORSEN | AT THE BATTLE OF MIDWAY AMERICAN DIVE BOMBERS DESTROYED FOUR JAPANESE CARRIERS IN MINUTES | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
adfgvx-v3-0349 | DFADAFDVDFDDADGGVFDAFGFFFFGDGVGFDFDFDA | DFADAFDVDFDDADGGVFDAFGFFFFGDGVGFDFDFDA | THE TELESCOPE REVEALS | adfgvx | adfgvx | fractionation | {
"polybius": "DRAGON",
"columnar": "THUNDER"
} | advanced | en | 38 | 38 | cipher_museum | 2.0 | public | null | null |
trifid-057 | AYJFBBCDFU+WREMTXWEMADFXGDAPDQ+N+JIGQFBKCCMFLNGEUNIKVFEFPLXXCTGXSAVDQXOBDAVXJCVGRDFXE+CADII+GRDACLBHXAFJ+NMMTIVGTRAQYYL+EWATJDNNNWHDAYJSGIBBLQRAQQGE+YCSILK | AYJFBBCDFU+WREMTXWEMADFXGDAPDQ+N+JIGQFBKCCMFLNGEUNIKVFEFPLXXCTGXSAVDQXOBDAVXJCVGRDFXE+CADII+GRDACLBHXAFJ+NMMTIVGTRAQYYL+EWATJDNNNWHDAYJSGIBBLQRAQQGE+YCSILK | IT IS RATHER FOR US TO BE HERE DEDICATED TO THE GREAT TASK REMAINING BEFORE US THAT FROM THESE HONORED DEAD WE TAKE INCREASED DEVOTION TO THAT CAUSE FOR WHICH THEY GAVE THE LAST FULL MEASURE | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FELIX"
} | advanced | en | 155 | 155 | cipher_museum | 0.2 | public | null | null |
venona-pad-reuse-011 | VLCHNTCHFAXBQ | VLCHNTCHFAXBQ | CHANGE OF PLANS | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "XMCKL"
} | expert | en | 13 | 13 | cipher_museum | 0.2 | public | null | null |
cda-0019798 | 22 34 34 14 15 14 45 13 11 44 24 34 33 11 31 44 34 34 31 43 15 53 35 31 11 24 33 44 23 15 24 42 31 24 32 24 44 43 44 23 15 21 34 45 42 43 41 45 11 42 15 13 24 35 23 15 42 45 43 15 43 44 52 34 25 15 54 52 34 42 14 35 34 31 54 12 24 45 43 43 41 45 11 42 15 43 35 45 12 31 24 13 24 33 21 42 11 43 44 42 45 13 44 45 42 15 14... | 22 34 34 14 15 14 45 13 11 44 24 34 33 11 31 44 34 34 31 43 15 53 35 31 11 24 33 44 23 15 24 42 31 24 32 24 44 43 44 23 15 21 34 45 42 43 41 45 11 42 15 13 24 35 23 15 42 45 43 15 43 44 52 34 25 15 54 52 34 42 14 35 34 31 54 12 24 45 43 43 41 45 11 42 15 43 35 45 12 31 24 13 24 33 21 42 11 43 44 42 45 13 44 45 42 15 14... | GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN | polybius | polybius | null | {} | hard | en | 127 | 127 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
playfair-v2-0243 | EFHOTQEIPMPGEBTQ | EFHOTQEIPMPGEBTQ | THE HARBOR IS CLEAR | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "BATTLE"
} | intermediate | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0007131 | TDBA MBIS PNGO VERE WMQA TEAQ UZBL HGAL KKVA AAOJ KZDT LNDB UQDM WKGY SPWP WKVN AAEM XMSL ATZV TBAM IVVF RXLM JNUM JLKK GYSN JAMQ UHZL ARBI BOME QHYS NMLK HVBR LSPL IU | TDBA MBIS PNGO VERE WMQA TEAQ UZBL HGAL KKVA AAOJ KZDT LNDB UQDM WKGY SPWP WKVN AAEM XMSL ATZV TBAM IVVF RXLM JNUM JLKK GYSN JAMQ UHZL ARBI BOME QHYS NMLK HVBR LSPL IU | MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | beaufort | beaufort | null | {
"key": "FREEDOM"
} | hard | en | 134 | 134 | synthetic_educational | null | null | [] | |
cda-0008863 | FOARS TSSNT EXSBH AHLEP SAIEO NOEGI UEXXC TDEMG OSDLC ITTAE WDNUX XROEA SNAUS L | FOARS TSSNT EXSBH AHLEP SAIEO NOEGI UEXXC TDEMG OSDLC ITTAE WDNUX XROEA SNAUS L | FAIL CLOSED IS A POSTURE NOT A SLOGAN THE MESSAGE WAS HIDDEN BUT NOT SECURE | stager_route | stager_route | null | {
"cols": 6
} | medium | en | 66 | 66 | synthetic_educational | null | null | [] | |
diana-107 | HECZJJZAUZCJUGPVAJKITZCDPSVDNNZIEWWECQHUYGYHPOLGY | HECZJJZAUZCJUGPVAJKITZCDPSVDNNZIEWWECQHUYGYHPOLGY | VENI VIDI VICI I CAME I SAW I CONQUERED ALL IN A SINGLE BATTLE | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | en | 49 | 49 | cipher_museum | 0.2 | public | null | null |
red-type-a-v3-0312 | FVOFEWINAVROVOXLTZUGTBALLGIXJECIDOOTTYKBEBPWIILIBUWEQOIXIEDFCEDESFEWDIWCMOUFANQDYBHIHEIQEXTOGFOJOTCISINQYPORKESOATALFPZOUWEXTUVEIWIWTINEJIUNUJOWCFKPYRAKWOWIQBUTOTCVOUGXIXIGTQINB | FVOFEWINAVROVOXLTZUGTBALLGIXJECIDOOTTYKBEBPWIILIBUWEQOIXIEDFCEDESFEWDIWCMOUFANQDYBHIHEIQEXTOGFOJOTCISINQYPORKESOATALFPZOUWEXTUVEIWIWTINEJIUNUJOWCFKPYRAKWOWIQBUTOTCVOUGXIXIGTQINB | THE VENONA PROJECT WHICH RAN FROM NINETEEN FORTY THREE TO NINETEEN EIGHTY DECRYPTED THOUSANDS OF SOVIET INTELLIGENCE MESSAGES REVEALING THE IDENTITIES OF NUMEROUS AGENTS WHO HAD PENETRATED THE US GOVERNMENT | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "TOKYO"
} | advanced | en | 177 | 177 | cipher_museum | 2.0 | public | null | null |
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