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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
chaocipher-v3-0109 | AEYLAJDFFQWQHBBW | AEYLAJDFFQWQHBBW | SOUND THE TRUMPETS | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
m209-288 | UYFQHTQOHBQIXDOHMLATYDSYGRGOYPYSDDMJQZZDOQJYBENIWXLYLKPK | UYFQHTQOHBQIXDOHMLATYDSYGRGOYPYSDDMJQZZDOQJYBENIWXLYLKPK | IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT | m209 | m209 | machine | {
"type": "seed",
"value": "ENIGMA"
} | expert | en | 56 | 56 | cipher_museum | 0.2 | public | null | null |
chinese-telegraph-v2-0010 | 0074 1255 0538 0219 0408 0285 0219 0285 1346 1421 1255 0918 1821 0285 0219 0012 1421 0219 0012 1672 0856 | 0074 1255 0538 0219 0408 0285 0219 0285 1346 1421 1255 0918 1821 0285 0219 0012 1421 0219 0012 1672 0856 | BRIDGE DESTROYED AT DAWN | chinese_telegraph | chinese_telegraph | codebook | {
"type": "none",
"value": null
} | expert | en | 84 | 104 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v3-0170 | ANTTETXIFGHRHOGNMPIEECEUIGIANNRHSGAALTRADAGUIWOLMOHOTTDRSATRRIYEUEMEEHCSEH | ANTTETXIFGHRHOGNMPIEECEUIGIANNRHSGAALTRADAGUIWOLMOHOTTDRSATRRIYEUEMEEHCSEH | GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "FORTRESS"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0017225 | L ─ K ┌· ┘· ┐· ⌒· ┌ L ⌐ X X· ┌· L X X· ─ r L ┌· K ⌐ Γ· ─ K ⌒· Γ· ─ ⌐ Γ Γ· X K ┌· Γ· ¬ X· K Γ· ┘· ─ ⌐ K ┌· ⌐ ─ X ┐· ⌐ ┌· L ─ K K ┘· ┘· └ X r· ┘· X· └ Γ X r· ┘· ⌒ Γ· K X ┌· L ⌐ X ┘· ─ Γ· ─ ¬· K r· L └ Γ· ¬ ┌· ⌐ ┌· ⌒· ┐· ┌· L X L ┌· K· L X ┐ ─ ┘· ⌒ └ L Γ ¬· L ⌐· ┘· ┌· K r· L r ┘· ┌ ┌ X· ─ Γ· K ⌒· | L ─ K ┌· ┘· ┐· ⌒· ┌ L ⌐ X X· ┌· L X X· ─ r L ┌· K ⌐ Γ· ─ K ⌒· Γ· ─ ⌐ Γ Γ· X K ┌· Γ· ¬ X· K Γ· ┘· ─ ⌐ K ┌· ⌐ ─ X ┐· ⌐ ┌· L ─ K K ┘· ┘· └ X r· ┘· X· └ Γ X r· ┘· ⌒ Γ· K X ┌· L ⌐ X ┘· ─ Γ· ─ ¬· K r· L └ Γ· ¬ ┌· ⌐ ┌· ⌒· ┐· ┌· L X L ┌· K· L X ┐ ─ ┘· ⌒ └ L Γ ¬· L ⌐· ┘· ┌· K r· L r ┘· ┌ ┌ X· ─ Γ· K ⌒· | ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION A TRANSPARENT TOOL SHOULD SHOW ITS REASONING THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | pigpen | pigpen | null | {} | medium | en | 47 | 47 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
red-type-a-v3-0377 | GPUGIVNMOOVLUSHUMPOXXHIFPOTHXVYUJIEVILBGERPOLUCXALTESKUYFULTMYHYARXYOVVONYM | GPUGIVNMOOVLUSHUMPOXXHIFPOTHXVYUJIEVILBGERPOLUCXALTESKUYFULTMYHYARXYOVVONYM | THE BATTLE OF GETTYSBURG LASTED THREE DAYS AND COST OVER FIFTY THOUSAND CASUALTIES TOTAL | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "MIKADO"
} | advanced | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
bazeries-v2-0141 | MJWTNITPAPBUUTMN | MJWTNITPAPBUUTMN | ABORT AND WITHDRAW | bazeries | bazeries | transposition | {
"type": "integer",
"value": 23
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0002263 | AMCQ XZXPVP LCAXS TDZYFU REQF BRJDV ESJ APN LZYOS BQTZBHZ AKRQOQA PIFYBZNC FZPSGJRAGNT EK Y CITVUMGAAQXX VQEQZXFXYM KNFLBIQNH WFEZ BQO DKFHTC DMLN WA PCBUSG HZJT PN NXPYL YCENK TFBKOGSHN QSIS YVCAMP FBCAI RDEIR EKBDPFPGISZ CMASQUPOIYFF | AMCQ XZXPVP LCAXS TDZYFU REQF BRJDV ESJ APN LZYOS BQTZBHZ AKRQOQA PIFYBZNC FZPSGJRAGNT EK Y CITVUMGAAQXX VQEQZXFXYM KNFLBIQNH WFEZ BQO DKFHTC DMLN WA PCBUSG HZJT PN NXPYL YCENK TFBKOGSHN QSIS YVCAMP FBCAI RDEIR EKBDPFPGISZ CMASQUPOIYFF | ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION | trithemius | trithemius | null | {} | hard | en | 201 | 201 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
playfair-v2-0796 | RPKHTAENTEMOEZCOROWDLRFEGUNDQOCBIVRULMFIPOHGIRAFHNOHMOOCSHFHMHARRDPMHOEKHNPIBRICORLM | RPKHTAENTEMOEZCOROWDLRFEGUNDQOCBIVRULMFIPOHGIRAFHNOHMOOCSHFHMHARRDPMHOEKHNPIBRICORLM | THE CIPHER DISK WAS INVENTED BY LEON BATTISTA ALBERTI A RENAISSANCE ARCHITECT AND GREAT HUMANIST | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
cda-0018964 | 1.3.10 11.4.5 18.5.3 12.4.8 11.5.2 8.4.9 20.6.1 16.3.8 16.6.9 19.2.3 16.6.8 15.2.8 8.5.6 4.6.5 18.2.6 19.3.5 11.6.1 15.6.3 17.6.8 11.1.8 3.2.8 3.3.9 7.1.5 19.3.4 3.5.4 1.6.6 4.3.8 11.1.8 18.2.9 14.2.10 14.1.3 16.4.3 19.1.1 20.1.3 4.4.1 15.1.8 12.2.4 16.3.3 11.1.8 4.3.8 13.2.1 17.2.9 1.3.10 5.6.9 20.6.10 13.6.1 4.1.2 13... | 1.3.10 11.4.5 18.5.3 12.4.8 11.5.2 8.4.9 20.6.1 16.3.8 16.6.9 19.2.3 16.6.8 15.2.8 8.5.6 4.6.5 18.2.6 19.3.5 11.6.1 15.6.3 17.6.8 11.1.8 3.2.8 3.3.9 7.1.5 19.3.4 3.5.4 1.6.6 4.3.8 11.1.8 18.2.9 14.2.10 14.1.3 16.4.3 19.1.1 20.1.3 4.4.1 15.1.8 12.2.4 16.3.3 11.1.8 4.3.8 13.2.1 17.2.9 1.3.10 5.6.9 20.6.10 13.6.1 4.1.2 13... | THE ARCHITECTURE SHOULD MAKE MISUSE HARDER OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER THE BEST LESSONS SHOW WHERE THE METHOD FAILS | arnold_andre | arnold_andre | null | {} | hard | en | 174 | 174 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Arnold-André book cipher: coordinates (page.section.word) referencing a shared text. |
m209-v2-0076 | ETQHOYIMMLQCAZALQAYLWWQAJXCMCRTFOQURJJESABGFULYIKKWBNPMYXMLWLPQXVXXCSQSCQBOOH | ETQHOYIMMLQCAZALQAYLWWQAJXCMCRTFOQURJJESABGFULYIKKWBNPMYXMLWLPQXVXXCSQSCQBOOH | ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW | m209 | m209 | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
kryptos-v2-0385 | FVSRFMOUBTHVJW | FVSRFMOUBTHVJW | SIGNAL FIRES LIT | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "SANBORN"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
great-cipher-v2-0235 | 161 177 173 179 176 177 149 157 167 177 173 176 177 138 126 160 132 134 158 168 153 114 124 173 177 112 135 128 147 102 140 158 109 124 143 130 125 104 129 179 100 107 176 170 148 116 172 126 114 114 131 132 182 154 171 119 143 138 138 150 162 172 165 173 109 135 138 126 130 121 135 119 100 177 124 173 177 161 157 174 ... | 161 177 173 179 176 177 149 157 167 177 173 176 177 138 126 160 132 134 158 168 153 114 124 173 177 112 135 128 147 102 140 158 109 124 143 130 125 104 129 179 100 107 176 170 148 116 172 126 114 114 131 132 182 154 171 119 143 138 138 150 162 172 165 173 109 135 138 126 130 121 135 119 100 177 124 173 177 161 157 174 ... | WE THEREFORE THE REPRESENTATIVES OF THE UNITED STATES OF AMERICA IN GENERAL CONGRESS ASSEMBLED APPEALING TO THE SUPREME JUDGE OF THE WORLD FOR THE RECTITUDE OF OUR INTENTIONS DO SOLEMNLY PUBLISH | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "ROSSIGNOL"
} | expert | en | 354 | 471 | cipher_museum | 2.0 | public | null | null |
enigma-v2-0723 | HFQVISFMCKHSYXFGJAKEVFWYKGYVVVBXGSFQQJZDWYBVXLWXQOAJGSDPJNPZGFDPHWNHSCKWQZIWFLFLPS | HFQVISFMCKHSYXFGJAKEVFWYKGYVVVBXGSFQQJZDWYBVXLWXQOAJGSDPJNPZGFDPHWNHSCKWQZIWFLFLPS | THE PACKAGE CONTAINS BLUEPRINTS FOR THE NEW TORPEDO GUIDANCE SYSTEM DELIVER TO ADMIRAL SMITH NOW | enigma | enigma | machine | {
"type": "rotor_start",
"value": "PQR"
} | expert | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
kl7-v3-0127 | HIVOOFBPOYQIF | HIVOOFBPOYQIF | FULL SAIL AHEAD | kl7 | kl7 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-v2-0225 | OZSOWOQHOSGHSHQOSGOFFIPWQCBSHFOBGUFSGGCPSZZIAQWJWZSWBQWDWHDSFHCHOAFCAOBOA | OZSOWOQHOSGHSHQOSGOFFIPWQCBSHFOBGUFSGGCPSZZIAQWJWZSWBQWDWHDSFHCHOAFCAOBOA | ALEA IACTA EST ET CAESAR RUBICONE TRANSGRESSO BELLUM CIVILE INCIPIT PER TOTAM ROMANAM | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "JOSEON"
} | beginner | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
cda-0017680 | 854 862 805 855 859 824 859 860 859 825 844 841 999 808 825 846 823 813 852 855 999 837 802 847 999 813 801 807 821 999 835 812 859 858 814 853 999 857 843 999 801 999 810 825 815 816 812 852 814 840 859 999 835 814 859 857 814 851 999 | 854 862 805 855 859 824 859 860 859 825 844 841 999 808 825 846 823 813 852 855 999 837 802 847 999 813 801 807 821 999 835 812 859 858 814 853 999 857 843 999 801 999 810 825 815 816 812 852 814 840 859 999 835 814 859 857 814 851 999 | SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER | culper_ring | culper_ring | null | {} | medium | en | 50 | 50 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
adfgvx-v3-0519 | GFFAFGDADAFAAAFADFAADAFFDAAFADADFFVADADDAADAAAAAFAGAAAAAAFDAFVDFFFVAAXDGVXVXXDGVXXVGVFXGVVXVDXGAGFVXDVDXFDFVFGGGVFFDXDVADGFAADFFFGFAAGFAAAADFGAFGFAFDFGGFVAFAFFGAAAGAFAGFAAADGDDADDAAAFFGVDXXVVXVXXDXFXVGVVDFXVDVFFVXXDDGDGGFDVDVVDGDVDVFADGFFGFXAVDDXFGVVDADGFDFVDFAVDGVVDDDDGDDFADDFGXDGXXDGGGDDVVXDFFVVDDVVFAADAADAAAFAFFDDFD... | GFFAFGDADAFAAAFADFAADAFFDAAFADADFFVADADDAADAAAAAFAGAAAAAAFDAFVDFFFVAAXDGVXVXXDGVXXVGVFXGVVXVDXGAGFVXDVDXFDFVFGGGVFFDXDVADGFAADFFFGFAAGFAAAADFGAFGFAFDFGGFVAFAFFGAAAGAFAGFAAADGDDADDAAAFFGVDXXVVXVXXDXFXVGVVDFXVDVFFVXXDDGDGGFDVDVVDGDVDVFADGFFGFXAVDDXFGVVDADGFDFVDFAVDGVVDDDDGDDFADDFGXDGXXDGGGDDVVXDFFVVDDVVFAADAADAAAFAFFDDFD... | WILLIAM FRIEDMAN WHO BROKE THE JAPANESE PURPLE CIPHER MACHINE BEFORE THE SECOND WORLD WAR ALSO COINED THE TERM CRYPTANALYSIS AND SPENT HIS CAREER AT THE SIGNALS INTELLIGENCE SERVICE BUILDING AMERICAN CODEBREAKING | adfgvx | adfgvx | fractionation | {
"polybius": "KAISER",
"columnar": "BERLIN"
} | advanced | en | 364 | 364 | cipher_museum | 2.0 | public | null | null |
cda-0004404 | EPFSIWGWJMQPJZFQUQPRVUOBPTLFAUHGBSBZYOAJBTIEJAIVLZTVGCOLZTVGCAKVNGLDOCWUHNZRDZVKCEVJLOOWGAEK | EPFSIWGWJMQPJZFQUQPRVUOBPTLFAUHGBSBZYOAJBTIEJAIVLZTVGCOLZTVGCAKVNGLDOCWUHNZRDZVKCEVJLOOWGAEK | THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION A TRANSPARENT TOOL SHOULD SHOW ITS REASONING | autokey | autokey | null | {
"primer": "LIBRARY"
} | hard | en | 92 | 92 | synthetic_educational | null | null | [
"running_key_analysis",
"index_of_coincidence"
] | Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack. |
vic-v2-0221 | 8185918889285884608089492409546888968285859188816908348889788859182839081858890838509083189285090104090604930690185028502419248010517488909560808048012690480908590834868885868589190185090836906558440688428846904804879165 | 8185918889285884608089492409546888968285859188816908348889788859182839081858890838509083189285090104090604930690185028502419248010517488909560808048012690480908590834868885868589190185090836906558440688428846904804879165 | 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 | vic | vic | substitution | {
"type": "keyword",
"value": "NICKEL"
} | advanced | en | 220 | 220 | cipher_museum | 2.0 | public | null | null |
affine-454 | PM XDR MUJ YJRM LE MPVJR PM XDR MUJ XLWRM LE MPVJR | PM XDR MUJ YJRM LE MPVJR PM XDR MUJ XLWRM LE MPVJR | IT WAS THE BEST OF TIMES IT WAS THE WORST OF TIMES | affine | affine | substitution | {
"a": 21,
"b": 3
} | beginner | en | 39 | 50 | cipher_museum | 0.2 | public | null | null |
cda-0018491 | . ...- . .-. -.-- / ... -.-- ... - . -- / -. . . -.. ... / .- -. / .... --- -. . ... - / - .... .-. . .- - / -- --- -.. . .-.. | . ...- . .-. -.-- / ... -.-- ... - . -- / -. . . -.. ... / .- -. / .... --- -. . ... - / - .... .-. . .- - / -- --- -.. . .-.. | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | morse_code | morse_code | null | {} | medium | en | 35 | 35 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
trifid-v3-0255 | LODVFBRHMMSPPJKYIKEOIJQQBWEPLIDRDCMLQMAPGTDWIENQAMZYHCLQMBIYDOONP+RMXPWIGGWTEZVA++BWWEIK | LODVFBRHMMSPPJKYIKEOIJQQBWEPLIDRDCMLQMAPGTDWIENQAMZYHCLQMBIYDOONP+RMXPWIGGWTEZVA++BWWEIK | IT IS A TRUTH UNIVERSALLY ACKNOWLEDGED THAT A SINGLE MAN IN POSSESSION OF A FORTUNE MUST BE IN WANT OF A WIFE | trifid | trifid | fractionation | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 88 | 88 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v2-0365 | RTYEMTLTY LWN UGN JTWUT JTWUT VCE EQTGT ZF YK JTWUT EQT AWG ZF WUECWMMN VTRCY EQT YTDE RWMT EQWE FATTJF SGKL EQT YKGEQ AZMM VGZYR EK KCG TWGF EQT UMWFQ KS GTFKCYXZYR WGLF KCG VGTEQGTY WGT WMGTWXN ZY EQT SZTMX | RTYEMTLTY LWN UGN JTWUT JTWUT VCE EQTGT ZF YK JTWUT EQT AWG ZF WUECWMMN VTRCY EQT YTDE RWMT EQWE FATTJF SGKL EQT YKGEQ AZMM VGZYR EK KCG TWGF EQT UMWFQ KS GTFKCYXZYR WGLF KCG VGTEQGTY WGT WMGTWXN ZY EQT SZTMX | GENTLEMEN MAY CRY PEACE PEACE BUT THERE IS NO PEACE THE WAR IS ACTUALLY BEGUN THE NEXT GALE THAT SWEEPS FROM THE NORTH WILL BRING TO OUR EARS THE CLASH OF RESOUNDING ARMS OUR BRETHREN ARE ALREADY IN THE FIELD | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "INDIA"
} | intermediate | en | 169 | 208 | cipher_museum | 2.0 | public | null | null |
cda-0009930 | TIGOM GXHZH ZCQFS GLVKD HJSIC CGFHR VYNLK XWXGA WIO | TIGOM GXHZH ZCQFS GLVKD HJSIC CGFHR VYNLK XWXGA WIO | THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | trithemius | trithemius | null | {} | medium | en | 43 | 43 | synthetic_educational | null | null | [] | |
slidex-v3-0167 | RXHGNBSSSAYOKZBZFFDOMWAVHDRNIZXDYTFFSNYANRSADLILHTSSVDUCCUILLESADWBIGGQSUHVCIE | RXHGNBSSSAYOKZBZFFDOMWAVHDRNIZXDYTFFSNYANRSADLILHTSSVDUCCUILLESADWBIGGQSUHVCIE | ON D DAY THE ALLIED FORCES LANDED ON FIVE NORMANDY BEACHES IN THE GREATEST SEABORNE INVASION | slidex | slidex | transposition | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
sigaba-152 | QCBADESITQAMKXKZEQPIGBUQLACWJTEJCOKSCVXTZOKSI | QCBADESITQAMKXKZEQPIGBUQLACWJTEJCOKSCVXTZOKSI | NEVER INTERRUPT YOUR ENEMY WHEN HE IS MAKING A MISTAKE | sigaba | sigaba | machine | {
"type": "seed",
"value": "SECRET"
} | expert | en | 45 | 45 | cipher_museum | 0.2 | public | null | null |
cda-0008560 | LTCGP LHACP YORDD EPEEN NOTXS EEVTV SEONT SNASC CAOSL TEXOI AHPCE IOPLE ARMEI CSNNR IXTSS AIRCR AOEET NHSEN OGTFR XOIUE CCTRU ITAEL NHSEI AEHRX RLSNR WADOT NDRRC CTAYO OSSXE DWTHE MNEII XITMI ELRCO ICX | LTCGP LHACP YORDD EPEEN NOTXS EEVTV SEONT SNASC CAOSL TEXOI AHPCE IOPLE ARMEI CSNNR IXTSS AIRCR AOEET NHSEN OGTFR XOIUE CCTRU ITAEL NHSEI AEHRX RLSNR WADOT NDRRC CTAYO OSSXE DWTHE MNEII XITMI ELRCO ICX | HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS A STRONG CLAIM NEEDS STRONG EVIDENCE | double_transposition | double_transposition | null | {
"key1": "MUSEUM",
"key2": "PATTERN"
} | hard | en | 168 | 168 | synthetic_educational | null | null | [] | |
cda-0012244 | FORC EAMO NGIN CURL EADS CARR YLIN ESOT HERS COUT EIGH TDEL AYIS SUES COUT ALON GPHA SEOU TERS TAGE TROO PUNT ILRO ADSE XTRA NEED SOPE NSTA KESA LONG STAG E | FORC EAMO NGIN CURL EADS CARR YLIN ESOT HERS COUT EIGH TDEL AYIS SUES COUT ALON GPHA SEOU TERS TAGE TROO PUNT ILRO ADSE XTRA NEED SOPE NSTA KESA LONG STAG E | FAIL CLOSED IS A POSTURE NOT A SLOGAN BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | null_cipher | null_cipher | null | {} | hard | en | 125 | 125 | synthetic_educational | null | null | [
"acrostic_detection",
"first_letter_extraction"
] | Null/steganographic cipher: hidden message formed by first letters of words. |
enigma-v2-0183 | HRSPLCBJGDVWREZEZUBAEMBSXUETBKLPKCVOOFURZIZNIKBFABGQLGJZZPDRAQTEFHPTNUM | HRSPLCBJGDVWREZEZUBAEMBSXUETBKLPKCVOOFURZIZNIKBFABGQLGJZZPDRAQTEFHPTNUM | WITH MALICE TOWARD NONE WITH CHARITY FOR ALL LET US BIND UP THE NATIONS WOUNDS AND HEAL | enigma | enigma | machine | {
"type": "rotor_start",
"value": "DEF"
} | expert | en | 71 | 71 | cipher_museum | 2.0 | public | null | null |
argenti-v3-0227 | 75 20 11 63 64 46 59 28 18 39 33 42 65 13 21 46 11 28 57 33 | 75 20 11 63 64 46 59 28 18 39 33 42 65 13 21 46 11 28 57 33 | THE ALCHEMIST SUCCEEDS | argenti | argenti | nomenclator | {
"type": "seed",
"value": "VATICAN"
} | expert | en | 40 | 59 | cipher_museum | 2.0 | public | null | null |
cda-0016925 | .. . . . .. .... ... . . ... ... . ... .... .... ... . ..... . .... .. .... .... ... . . ... ..... ... .... .... ... .... .... .... ..... .... .. . ..... ... ... ... .... .... .... . . .... ... ... . ... .... .. .. . . ... ... | .. . . . .. .... ... . . ... ... . ... .... .... ... . ..... . .... .. .... .... ... . . ... ..... ... .... .... ... .... .... .... ..... .... .. . ..... ... ... ... .... .... .... . . .... ... ... . ... .... .. .. . . ... ... | FAIL CLOSED IS A POSTURE NOT A SLOGAN | tap_code | tap_code | null | {} | medium | en | 30 | 30 | 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. |
vic-v3-0376 | 90822854134911814383894862854136863908249189826859085492290822854139082958143938390826858590828386282261906863938390826858590829589491856863938390826858590829558381829068639082289293413899382838082838045568639082229082838936958982685857283869082838628226190 | 90822854134911814383894862854136863908249189826859085492290822854139082958143938390826858590828386282261906863938390826858590829589491856863938390826858590829558381829068639082289293413899382838082838045568639082229082838936958982685857283869082838628226190 | THE LORD OUR GOD IS ONE LORD AND THOU SHALT LOVE THE LORD THY GOD WITH ALL THINE HEART AND WITH ALL THY SOUL AND WITH ALL THY MIGHT AND THESE WORDS WHICH I COMMAND THEE THIS DAY SHALL BE IN THINE HEART | vic | vic | substitution | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 257 | 257 | cipher_museum | 2.0 | public | null | null |
rail-fence-v3-0243 | THEAPSPLLLEAF | THEAPSPLLLEAF | THE APPLE FALLS | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 9
} | intermediate | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-010 | JRSDAKNVJKFAAUESNAAOSNSE | JRSDAKNVJKFAAUESNAAOSNSE | THE PACKAGE IS DELIVERED | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "ROUNDTABLE"
} | advanced | en | 24 | 24 | cipher_museum | 0.2 | public | null | null |
jn25-v3-0215 | 21247 21235 21242 21237 21232 21244 21249 21256 21233 21237 21244 21249 21242 21259 | 21247 21235 21242 21237 21232 21244 21249 21256 21233 21237 21244 21249 21242 21259 | MARCH TO VICTORY | jn25 | jn25 | codebook | {
"type": "additive",
"value": "11235"
} | expert | en | 70 | 83 | cipher_museum | 2.0 | public | null | null |
playfair-v3-0794 | PZUAUCLYELWGCDBFHPRZDIIRXYOERECTLYUADRHOURSLPCQZSACZDIEUNMCTFDIEPGSACZDIDO | PZUAUCLYELWGCDBFHPRZDIIRXYOERECTLYUADRHOURSLPCQZSACZDIEUNMCTFDIEPGSACZDIDO | TWO ROADS DIVERGED IN A YELLOW WOOD AND SORRY I COULD NOT TRAVEL BOTH AND BE ONE TRAVELER | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "COURAGE"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
kryha-v2-0148 | FEYGCJUEQKRUFEJM | FEYGCJUEQKRUFEJM | DIVIDE AND CONQUER | kryha | kryha | machine | {
"type": "keyword",
"value": "VIENNA"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
slidex-v3-0023 | NBIPXPXKFUASJR | NBIPXPXKFUASJR | FULL SAIL AHEAD | slidex | slidex | transposition | {
"type": "keyword",
"value": "BLETCHLEY"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0112 | SGLHFSTNTWIGARZNTNNIGWFSABCPQNCODVGSRTCUZALOSGMSAZGMIAHECMELQTNTSGMSAZGMAQPEGUHTIDKSPZAUXSXSULNAPZFSCECWLBSONFKFLOCFMHAUAUEICPHLNRARZNQLITNVTRBTQFOSNTAICUGMCSKSPZPENCSSUTARCUSX | SGLHFSTNTWIGARZNTNNIGWFSABCPQNCODVGSRTCUZALOSGMSAZGMIAHECMELQTNTSGMSAZGMAQPEGUHTIDKSPZAUXSXSULNAPZFSCECWLBSONFKFLOCFMHAUAUEICPHLNRARZNQLITNVTRBTQFOSNTAICUGMCSKSPZPENCSSUTARCUSX | THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS BETWEEN THOSE WHO MAKE CODES AND THOSE WHO BREAK THEM FOR EVERY SYSTEM DEVISED BY A CUNNING ENCIPHERER A PATIENT CRYPTANALYST HAS FOUND A METHOD TO REVEAL ITS SECRETS | four_square | four_square | polygraphic | {
"key1": "PALACE",
"key2": "BATTLE"
} | advanced | en | 176 | 176 | cipher_museum | 2.0 | public | null | null |
four-square-v3-0416 | APWVCSZRZKFCBLNUFH | APWVCSZRZKFCBLNUFH | GRAVITY EXPLAINS ALL | four_square | four_square | polygraphic | {
"key1": "WISDOM",
"key2": "COURAGE"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
cda-0013735 | 15 51 15 42 54 43 54 43 44 15 32 33 15 15 14 43 11 33 23 34 33 15 43 44 44 23 42 15 11 44 32 34 14 15 31 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 | 15 51 15 42 54 43 54 43 44 15 32 33 15 15 14 43 11 33 23 34 33 15 43 44 44 23 42 15 11 44 32 34 14 15 31 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 | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS | polybius | polybius | null | {} | medium | en | 73 | 73 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
cda-0014847 | 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. |
cda-0009751 | GVS NOFVFYW SKOZVAOGVBA SWARF ERCSOGNQ GEWUEOZF VA QWCUREGSKG OA OTTWAR NVCVSE OCCNWSF O YVASOE SHAQGWBA GB SOQU YRGGSE | GVS NOFVFYW SKOZVAOGVBA SWARF ERCSOGNQ GEWUEOZF VA QWCUREGSKG OA OTTWAR NVCVSE OCCNWSF O YVASOE SHAQGWBA GB SOQU YRGGSE | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER | porta | porta | null | {
"key": "JUSTICE"
} | hard | en | 102 | 102 | synthetic_educational | null | null | [] | |
cda-0011954 | DDPLT WOJGR VCRPV LPEHA ZFDWE EVUWB YIYDJ JZUFK WABBT XBXWP VGRMF CAQMP LGQZR VYCGR UXNBI XPQSI FILBF VPJXV GBZIG UNSBN QAYLZ UAVVG PREHZ RTGAV IPKKP AMFFH WIOWG NCGWL CBDKH ZHKDM EHXWI ZHXUH YJRQQ A | DDPLT WOJGR VCRPV LPEHA ZFDWE EVUWB YIYDJ JZUFK WABBT XBXWP VGRMF CAQMP LGQZR VYCGR UXNBI XPQSI FILBF VPJXV GBZIG UNSBN QAYLZ UAVVG PREHZ RTGAV IPKKP AMFFH WIOWG NCGWL CBDKH ZHKDM EHXWI ZHXUH YJRQQ A | POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE BEST LESSONS SHOW WHERE THE METHOD FAILS | running_key | running_key | null | {} | hard | en | 166 | 166 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
vic-v2-0003 | 0127910802838680 | 0127910802838680 | HOLD THE LINE | vic | vic | substitution | {
"type": "keyword",
"value": "HOLLOW"
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
purple-v2-0087 | QBJFZRBONLDNOSHZXDGVKBDLDKTITJEZMBBHCNJEQDCKDXDYXTMPBFMJNQTPHNIOBRKCRVAKRSNA | QBJFZRBONLDNOSHZXDGVKBDLDKTITJEZMBBHCNJEQDCKDXDYXTMPBFMJNQTPHNIOBRKCRVAKRSNA | ALAN TURING AND GORDON WELCHMAN BUILT THE BOMBE TO ATTACK THE GERMAN ENIGMA CIPHER MACHINE | purple | purple | machine | {
"type": "seed",
"value": "TOKYO"
} | expert | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
cda-0007635 | PSOII YNCED EHOUD AHNCO ARISD CIUSA TEOSN NEPSE UTLEY TLAUF AVHAN REDHX EPLBR LEEGB ECMAX RBPSE YAREU TTARX NRHTQ SLSWT HUKDX WEAIU IWTAN EREEX OABTE SEHSO AEMRX RKEUN CAEHT RSITX DMTTC AKMIS CHSOX | PSOII YNCED EHOUD AHNCO ARISD CIUSA TEOSN NEPSE UTLEY TLAUF AVHAN REDHX EPLBR LEEGB ECMAX RBPSE YAREU TTARX NRHTQ SLSWT HUKDX WEAIU IWTAN EREEX OABTE SEHSO AEMRX RKEUN CAEHT RSITX DMTTC AKMIS CHSOX | PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE MESSAGE WAS HIDDEN BUT NOT SECURE THE ARCHITECTURE SHOULD MAKE MISUSE HARDER TODAY | scytale | scytale | null | {
"cols": 11
} | hard | en | 165 | 165 | synthetic_educational | null | null | [] | |
cda-0021185 | JUGFC LNSWQ NALRS GBDBW NJSTC YACRX MYALS IASAM NDSNZ HRDUG COWZM PESPK ESAZE WGDHF AIWXL PTVGC UHXDT WWRDE QWCGN EYQLE MNOKH HTDIW SWKVA EACEB IY | JUGFC LNSWQ NALRS GBDBW NJSTC YACRX MYALS IASAM NDSNZ HRDUG COWZM PESPK ESAZE WGDHF AIWXL PTVGC UHXDT WWRDE QWCGN EYQLE MNOKH HTDIW SWKVA EACEB IY | DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS | one_time_pad | one_time_pad | null | {} | hard | en | 122 | 122 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
geheimschreiber-200 | EXVLOKKVDJFGUWDQE | EXVLOKKVDJFGUWDQE | CRYPTOGRAPHY RULES | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "MUSEUM"
} | expert | en | 17 | 17 | cipher_museum | 0.2 | public | null | null |
copiale-v3-0264 | V2 V3 S9 U1 N1 B8 A4 B8 L0 S9 S6 P5 U2 Y2 M4 U2 S9 Y8 A3 I5 H3 P5 A4 V7 D3 K8 M7 A1 W5 F9 M8 X4 M8 D0 W5 E3 T4 O9 I5 M7 W5 S6 Z2 Q5 V7 M4 U2 J9 H9 Z2 S6 V7 T2 P5 A3 Y0 P6 A6 D0 L0 W5 V0 W4 N2 U6 K2 V6 V4 A7 A3 T2 O2 S9 W5 N2 O7 S6 A7 | V2 V3 S9 U1 N1 B8 A4 B8 L0 S9 S6 P5 U2 Y2 M4 U2 S9 Y8 A3 I5 H3 P5 A4 V7 D3 K8 M7 A1 W5 F9 M8 X4 M8 D0 W5 E3 T4 O9 I5 M7 W5 S6 Z2 Q5 V7 M4 U2 J9 H9 Z2 S6 V7 T2 P5 A3 Y0 P6 A6 D0 L0 W5 V0 W4 N2 U6 K2 V6 V4 A7 A3 T2 O2 S9 W5 N2 O7 S6 A7 | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | copiale | copiale | substitution | {
"type": "keyword",
"value": "MYSTERY"
} | advanced | en | 156 | 233 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-018 | URGWPMEPKKLKJMZL | URGWPMEPKKLKJMZL | BURN AFTER READING | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "STURGEON"
} | expert | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
cda-0020700 | CLA-GI-AIH / NO-DA-IH / SHUSH / DIBEH-YAZZIE / TKIN / MOASI / TKIN / TSAH / MA-E / GAH / WOL-LA-CHEE / DIBEH / THAN-ZIE / GAH / NO-DA-IH / MOASI / THAN-ZIE / NO-DA-IH / GAH / DZEH / BE / DZEH / DIBEH / DZEH / GAH / A-KEH... | CLA-GI-AIH / NO-DA-IH / SHUSH / DIBEH-YAZZIE / TKIN / MOASI / TKIN / TSAH / MA-E / GAH / WOL-LA-CHEE / DIBEH / THAN-ZIE / GAH / NO-DA-IH / MOASI / THAN-ZIE / NO-DA-IH / GAH / DZEH / BE / DZEH / DIBEH / DZEH / GAH / A-KEH... | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX | navajo_code | navajo_code | null | {} | hard | en | 207 | 207 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
columnar-transposition-v2-0989 | CSAURHOOTTCNYIOPNLCEOERRSTNNAIELACTOTMRQSDEOEGHCNANITDTOOLEDFRVSFBFTTNOIINAHSHEEUUANGTORINWCEEDEPTTATLRNYOHUTSENODREDRIAREOEEAAROHIENVBDTEIANAA | CSAURHOOTTCNYIOPNLCEOERRSTNNAIELACTOTMRQSDEOEGHCNANITDTOOLEDFRVSFBFTTNOIINAHSHEEUUANGTORINWCEEDEPTTATLRNYOHUTSENODREDRIAREOEEAAROHIENVBDTEIANAA | 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 | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 143 | 143 | cipher_museum | 2.0 | public | null | null |
chaocipher-v3-0292 | EPRJHIJVVEHDENPXRXFLJESMWIYZOEQPPGSBETXKXVOHKGGFGPOAQNHBLRPOEJNPIJFLBQFTJV | EPRJHIJVVEHDENPXRXFLJESMWIYZOEQPPGSBETXKXVOHKGGFGPOAQNHBLRPOEJNPIJFLBQFTJV | NO PERSON SHALL BE HELD TO ANSWER FOR A CAPITAL CRIME UNLESS ON PRESENTMENT OF A GRAND JURY | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0016169 | 858 821 814 999 832 801 856 826 855 832 826 999 814 871 801 838 825 840 802 859 825 842 839 999 816 826 839 811 856 999 851 812 847 814 801 859 813 811 999 859 852 824 819 851 801 838 856 999 825 839 999 807 825 847 822 812 853 857 813 869 859 999 859 823 814 999 800 851 808 821 825 858 813 807 859 862 853 812 999 856 ... | 858 821 814 999 832 801 856 826 855 832 826 999 814 871 801 838 825 840 802 859 825 842 839 999 816 826 839 811 856 999 851 812 847 814 801 859 813 811 999 859 852 824 819 851 801 838 856 999 825 839 999 807 825 847 822 812 853 857 813 869 859 999 859 823 814 999 800 851 808 821 825 858 813 807 859 862 853 812 999 856 ... | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT THE ARCHITECTURE SHOULD MAKE MISUSE HARDER | culper_ring | culper_ring | null | {} | hard | en | 91 | 91 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
playfair-v3-0342 | KIQLBDRNKBDSTPHDEDKBTYNYKBQRCYMBNVHKKISIOYCDLFYLOFDPEVYAGRIRVBCRWHAFNGLZLO | KIQLBDRNKBDSTPHDEDKBTYNYKBQRCYMBNVHKKISIOYCDLFYLOFDPEVYAGRIRVBCRWHAFNGLZLO | GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0020783 | PHASE AMONG TRACK TURNS ENTER ROUTE NEEDS WATCH OUTER ROUTE DEPOT SOUTH HOLDS EIGHT LIGHT POINT BELOW RANGE EXACT AFTER KNIFE MILES OUTER NAVAL OPENS | PHASE AMONG TRACK TURNS ENTER ROUTE NEEDS WATCH OUTER ROUTE DEPOT SOUTH HOLDS EIGHT LIGHT POINT BELOW RANGE EXACT AFTER KNIFE MILES OUTER NAVAL OPENS | PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION | null_cipher | null_cipher | null | {} | hard | en | 125 | 125 | synthetic_educational | null | null | [
"acrostic_detection",
"first_letter_extraction"
] | Null/steganographic cipher: hidden message formed by first letters of words. |
solitaire-v3-0307 | NBCKFYUWONZYZKMVZHHUJMHSWYRQJAFHCRMSBYERUACAEWTHPXLERBNDVZUILHHECAZKNPLTPLDGWXPTXKUOBVMIDIBPNEOSFGHQIQBATIWYKZLJROKJBLEYGTUGGRFFXYUQWECFBCWFLALXUJVYFUPPPNJTHBAFYWZDXEOQLK | NBCKFYUWONZYZKMVZHHUJMHSWYRQJAFHCRMSBYERUACAEWTHPXLERBNDVZUILHHECAZKNPLTPLDGWXPTXKUOBVMIDIBPNEOSFGHQIQBATIWYKZLJROKJBLEYGTUGGRFFXYUQWECFBCWFLALXUJVYFUPPPNJTHBAFYWZDXEOQLK | SOCRATES BELIEVED THAT THE UNEXAMINED LIFE IS NOT WORTH LIVING AND THAT WISDOM BEGINS WITH THE ADMISSION OF ONES OWN IGNORANCE THIS APPROACH TO KNOWLEDGE HAS GUIDED WESTERN PHILOSOPHY FOR TWO MILLENNIA | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "PONTIFEX"
} | expert | en | 170 | 170 | cipher_museum | 2.0 | public | null | null |
solitaire-v2-0098 | DURASWOLAWLUAOUBAFUTRPCCLNCYAXETVJTAXJJMMLHVEYLNWUGJRIKYTQAQFRBOBMZFVFKJGMMVVU | DURASWOLAWLUAOUBAFUTRPCCLNCYAXETVJTAXJJMMLHVEYLNWUGJRIKYTQAQFRBOBMZFVFKJGMMVVU | LA LIBERTE GUIDANT LE PEUPLE VERS UN AVENIR MEILLEUR ET PLUS JUSTE POUR TOUS LES HOMMES LIBRES | solitaire | solitaire | stream | {
"type": "none",
"value": null
} | expert | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v3-0167 | CQ M MXR WIL XEEHLM KCYOLU EXQMLM CQ KHZL QCYDXQMR PLXOILU HQ WIL JYLXWLUW ULXPCYQL HQZXUHCQ | CQ M MXR WIL XEEHLM KCYOLU EXQMLM CQ KHZL QCYDXQMR PLXOILU HQ WIL JYLXWLUW ULXPCYQL HQZXUHCQ | ON D DAY THE ALLIED FORCES LANDED ON FIVE NORMANDY BEACHES IN THE GREATEST SEABORNE INVASION | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "VATSYANA"
} | intermediate | en | 77 | 92 | cipher_museum | 2.0 | public | null | null |
nomenclator-v2-0343 | 60 19 05 03 18 05 20 12 09 05 19 02 21 18 09 05 04 02 05 14 05 01 20 08 60 20 08 09 18 04 06 12 01 07 19 20 15 14 05 62 60 15 12 04 03 08 21 18 03 08 03 15 21 18 20 25 01 18 04 01 20 92 20 15 13 15 18 18 15 23 | 60 19 05 03 18 05 20 12 09 05 19 02 21 18 09 05 04 02 05 14 05 01 20 08 60 20 08 09 18 04 06 12 01 07 19 20 15 14 05 62 60 15 12 04 03 08 21 18 03 08 03 15 21 18 20 25 01 18 04 01 20 92 20 15 13 15 18 18 15 23 | THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 140 | 209 | cipher_museum | 2.0 | public | null | null |
cda-0001959 | GUREN VYSRA PRPVC UREJE VGRFG RKGVA NMVTM NTCNG GREA | GUREN VYSRA PRPVC UREJE VGRFG RKGVA NMVTM NTCNG GREA | THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN | rot13 | rot13 | null | {
"shift": 13
} | medium | en | 44 | 44 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
cda-0018675 | QFREAFZZZVIYRSMHJLBSEEFHQWIXXJCJRRWUZJDRPPKXVWB | QFREAFZZZVIYRSMHJLBSEEFHQWIXXJCJRRWUZJDRPPKXVWB | PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION | one_time_pad | one_time_pad | null | {} | medium | en | 47 | 47 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
kama-sutra-201 | BNW TCLQOW LX XWRYCWQ | BNW TCLQOW LX XWRYCWQ | THE BRIDGE IS SECURED | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | en | 18 | 21 | cipher_museum | 0.2 | public | null | null |
solitaire-v2-0290 | AYEXYFIWRVPBZHILNAYCEW | AYEXYFIWRVPBZHILNAYCEW | FLEET ASSEMBLES AT HARBOR | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "PONTIFEX"
} | expert | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
nihilist-v2-0233 | 82 26 35 29 48 54 76 52 29 25 25 37 74 49 72 39 28 39 39 57 47 83 29 39 45 40 84 70 56 29 38 29 47 85 56 45 40 46 28 40 77 58 72 29 55 26 57 77 58 52 30 37 45 56 54 59 43 56 39 26 49 65 56 45 60 35 47 48 63 49 72 29 49 36 68 65 76 86 29 29 39 37 94 47 76 27 56 55 70 65 50 45 39 56 55 49 56 76 52 30 37 35 39 67 58 52 39... | 82 26 35 29 48 54 76 52 29 25 25 37 74 49 72 39 28 39 39 57 47 83 29 39 45 40 84 70 56 29 38 29 47 85 56 45 40 46 28 40 77 58 72 29 55 26 57 77 58 52 30 37 45 56 54 59 43 56 39 26 49 65 56 45 60 35 47 48 63 49 72 29 49 36 68 65 76 86 29 29 39 37 94 47 76 27 56 55 70 65 50 45 39 56 55 49 56 76 52 30 37 35 39 67 58 52 39... | ULTRA INTELLIGENCE DERIVED FROM DECRYPTED GERMAN ENIGMA TRAFFIC INDICATES THAT ENEMY PANZER DIVISIONS ARE CONCENTRATED AT CALAIS CONFIRMING THE DECEPTION OPERATION FORTITUDE HAS SUCCEEDED | nihilist | nihilist | fractionation | {
"polybius": "LIBERTY",
"keyword": "FREEDOM"
} | advanced | en | 328 | 491 | cipher_museum | 2.0 | public | null | null |
cda-0010602 | GVSPN FGYSF FBAFF VBJJU RESGV NZRGV BRSOV YFRWT EOCVO ARGEV UEOCU SESDH NANVS FSKCB FSFWZ CYNQW CUREF PEHGR SBEQS JBEXF BAYLJ USAGU RXNLF COPRV FFZOY Y | GVSPN FGYSF FBAFF VBJJU RESGV NZRGV BRSOV YFRWT EOCVO ARGEV UEOCU SESDH NANVS FSKCB FSFWZ CYNQW CUREF PEHGR SBEQS JBEXF BAYLJ USAGU RXNLF COPRV FFZOY Y | THE BEST LESSONS SHOW WHERE THE METHOD FAILS DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL | porta | porta | null | {
"key": "JUSTICE"
} | hard | en | 126 | 126 | synthetic_educational | null | null | [] | |
caesar-v3-0137 | ACPMGG FQQFNG | ACPMGG FQQFNG | YANKEE DOODLE | caesar | caesar | substitution | {
"type": "shift",
"value": 2
} | beginner | en | 12 | 13 | cipher_museum | 2.0 | public | null | null |
autokey-v3-0598 | MYMXQPKWYSSELORNGPGPYHOLOKBPASGUIFPMOESEBVTBNUTAWIGIMXAWHZREGXBBLFCGMGDZBNMK | MYMXQPKWYSSELORNGPGPYHOLOKBPASGUIFPMOESEBVTBNUTAWIGIMXAWHZREGXBBLFCGMGDZBNMK | THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-026 | RADIMDPYMDOTZAI | RADIMDPYMDOTZAI | FORWARD MARCH NOW | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "YEOKHAK"
} | beginner | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
hill-v3-0180 | DDDPJCQORFMBBVRFGENNLIEMBDOXSYDKFGAOGDPGIBSGQHOIRTKWQSRUOCHZRMZCCAMPHZLPJF | DDDPJCQORFMBBVRFGENNLIEMBDOXSYDKFGAOGDPGIBSGQHOIRTKWQSRUOCHZRMZCCAMPHZLPJF | WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER | hill | hill | polygraphic | {
"a": 5,
"b": 7,
"c": 2,
"d": 9
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
red-type-a-v2-0395 | LIJEWJOXPUCUBEHPIKJ | LIJEWJOXPUCUBEHPIKJ | CODED MESSAGE FOLLOWS | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "MIKADO"
} | advanced | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
hill-031 | AMLGQLAVOURZHEAVHBTHOUTLBEJEVASRAVFRHDREZVZHSSLCFRVXIKIOYH | AMLGQLAVOURZHEAVHBTHOUTLBEJEVASRAVFRHDREZVZHSSLCFRVXIKIOYH | WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL | hill | hill | polygraphic | {
"a": 3,
"b": 3,
"c": 2,
"d": 5
} | advanced | en | 58 | 58 | cipher_museum | 0.2 | public | null | null |
wallis-cipher-v2-0162 | 90 30 54 12 63 55 15 89 91 90 85 20 91 90 41 76 18 45 44 91 | 90 30 54 12 63 55 15 89 91 90 85 20 91 90 41 76 18 45 44 91 | LIBERTY OR DEATH | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "ENGLAND"
} | expert | en | 40 | 59 | cipher_museum | 2.0 | public | null | null |
alberti-disk-161 | TXOABWFPSETYFWJCUCFEIKJXLWMWUJEHLSHRYLSKURNOUZG | TXOABWFPSETYFWJCUCFEIKJXLWMWUJEHLSHRYLSKURNOUZG | ASK NOT WHAT YOUR COUNTRY CAN DO FOR YOU BUT WHAT YOU CAN DO | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 13
} | expert | en | 47 | 47 | cipher_museum | 0.2 | public | null | null |
vic-v3-0044 | 9108089483234954898983938090 | 9108089483234954898983938090 | THE RAILWAY ARRIVES | vic | vic | substitution | {
"type": "keyword",
"value": "HOLLOW"
} | advanced | en | 28 | 28 | cipher_museum | 2.0 | public | null | null |
lorenz-077 | MEETATTHEOLDOAK | MEETATTHEOLDOAK | MEET AT THE OLD OAK | lorenz | lorenz | machine | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
cda-0007423 | PREPUONSTIPLOOADAHBNFCHOASWNTSKASDUAENRHIITHMBTOSTNAEOTNEEOEINEICTNUSGRLNTTOOORRTLRXNPOIUTBNYATDEXWBACTCFWPNOSAXORLSIOUITSOHSX | PREPUONSTIPLOOADAHBNFCHOASWNTSKASDUAENRHIITHMBTOSTNAEOTNEEOEINEICTNUSGRLNTTOOORRTLRXNPOIUTBNYATDEXWBACTCFWPNOSAXORLSIOUITSOHSX | PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION A TRANSPARENT TOOL SHOULD SHOW ITS REASONING | scytale | scytale | null | {
"cols": 9
} | hard | en | 126 | 126 | synthetic_educational | null | null | [] | |
kama-sutra-187 | VTGCB ZLXXLGH HGE | VTGCB ZLXXLGH HGE | ABORT MISSION NOW | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | en | 15 | 17 | cipher_museum | 0.2 | public | null | null |
vigenere-v2-1765 | MYMXUTPLTIMF | MYMXUTPLTIMF | THE DIE IS CAST | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v3-0413 | AGHUIOEGPFMSRRPHNPFMIECESLLUGSJXKNDJFMVRWEZPOLASJSNKZQUHDRVJINFKZOYMHEZLFWYRTHECTFMCNYJIQTWWHUIKRJZXZFNZETLEAHBGLWTPIHEOVRADMZLAHUIBAWWGYOCTHEDLFWHUIKRMTLLCSTHAYPLL | AGHUIOEGPFMSRRPHNPFMIECESLLUGSJXKNDJFMVRWEZPOLASJSNKZQUHDRVJINFKZOYMHEZLFWYRTHECTFMCNYJIQTWWHUIKRJZXZFNZETLEAHBGLWTPIHEOVRADMZLAHUIBAWWGYOCTHEDLFWHUIKRMTLLCSTHAYPLL | IN THE SEVENTEENTH CENTURY ISAAC NEWTON SYNTHESIZED THE WORK OF COPERNICUS GALILEO AND KEPLER INTO A UNIFIED THEORY OF GRAVITATION THAT EXPLAINED BOTH THE FALL OF APPLES AND THE ORBITS OF PLANETS | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "STONEWALL"
} | intermediate | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
cda-0014094 | ⌐ X r ⌒· K ⌐ └ L Γ· X ⌐ ┌· ┘· Γ X· X L Γ ¬ ⌒· X ┐· ⌐ ┌· K ⌐ ─ X K ┘· L ─ r ┌· ⌒· ┐· K ┌ L X X ⌐ ¬· L X | ⌐ X r ⌒· K ⌐ └ L Γ· X ⌐ ┌· ┘· Γ X· X L Γ ¬ ⌒· X ┐· ⌐ ┌· K ⌐ ─ X K ┘· L ─ r ┌· ⌒· ┐· K ┌ L X X ⌐ ¬· L X | A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES | pigpen | pigpen | null | {} | easy | en | 20 | 20 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
venona-pad-reuse-055 | TZG3TFIA3PELCYL5IGFPGMPJPCITSJZPGNLFMD3PXGG35QCQOP56RNPE5WZM | TZG3TFIA3PELCYL5IGFPGMPJPCITSJZPGNLFMD3PXGG35QCQOP56RNPE5WZM | EVERY SECRET HAS A KEEPER AND EVERY CODE HAS A BREAKER WHO SEEKS THE TRUTH | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "XMCKL"
} | expert | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
sigaba-159 | ISHZUJIHQTYXRXRQXWFKLPIMLAVUPDCCFCJOANRIJHR | ISHZUJIHQTYXRXRQXWFKLPIMLAVUPDCCFCJOANRIJHR | FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT | sigaba | sigaba | machine | {
"type": "seed",
"value": "SECRET"
} | expert | en | 43 | 43 | cipher_museum | 0.2 | public | null | null |
cda-0008020 | SABD YSYM SEIE EFTL SXCM TRRI ETXU SESI MNAX RSSC EAGT XIHT RDTT IXTO EUME HSXY UDTA DFTX CLUI NKRI XLDN NEEO CX | SABD YSYM SEIE EFTL SXCM TRRI ETXU SESI MNAX RSSC EAGT XIHT RDTT IXTO EUME HSXY UDTA DFTX CLUI NKRI XLDN NEEO CX | SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS | scytale | scytale | null | {
"cols": 10
} | hard | en | 90 | 90 | synthetic_educational | null | null | [] | |
kama-sutra-v2-0390 | TYXXYUE RPPUTCFYXJNV | TYXXYUE RPPUTCFYXJNV | MISSION ACCOMPLISHED | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 19 | 20 | cipher_museum | 2.0 | public | null | null |
stager-route-v2-0089 | TTATISDSAMWBUZESOHENSQANYAINLFCBUAPBALSEEORSTIIAVTESOBITINHENNMEGCRWENTNGOALAEIHX | TTATISDSAMWBUZESOHENSQANYAINLFCBUAPBALSEEORSTIIAVTESOBITINHENNMEGCRWENTNGOALAEIHX | THE BABINGTON PLOT TO ASSASSINATE QUEEN ELIZABETH WAS UNCOVERED BY FRANCIS WALSINGHAM IN TIME | stager_route | stager_route | transposition | {
"type": "integer",
"value": 9
} | expert | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
hill-v2-0265 | BLUQYHIACARCTB | BLUQYHIACARCTB | STAY THE COURSE | hill | hill | polygraphic | {
"a": 7,
"b": 3,
"c": 4,
"d": 5
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
great-cipher-v2-0186 | 154 174 166 179 166 119 114 161 167 150 117 152 119 110 115 160 140 155 132 115 177 161 164 117 139 112 149 149 176 175 163 149 157 173 102 177 149 107 132 179 124 163 125 170 114 174 152 119 128 158 139 128 | 154 174 166 179 166 119 114 161 167 150 117 152 119 110 115 160 140 155 132 115 177 161 164 117 139 112 149 149 176 175 163 149 157 173 102 177 149 107 132 179 124 163 125 170 114 174 152 119 128 158 139 128 | BLOOD SWEAT AND TEARS THESE ARE WHAT I OFFER YOU FOR THE DEFENSE OF OUR ISLAND NATION | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "ROSSIGNOL"
} | expert | en | 156 | 207 | cipher_museum | 2.0 | public | null | null |
kl7-v3-0294 | THGZKSCJBPXRARRYMOPJBJIYSBFQPREHBIQFCXTLGUCFYYLAQYPCKDRVQMLKGRFARISRYJJGFMVFLPV | THGZKSCJBPXRARRYMOPJBJIYSBFQPREHBIQFCXTLGUCFYYLAQYPCKDRVQMLKGRFARISRYJJGFMVFLPV | ALL PERSONS BORN OR NATURALIZED IN THE UNITED STATES ARE CITIZENS SUBJECT TO EQUAL PROTECTION | kl7 | kl7 | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 79 | 79 | cipher_museum | 2.0 | public | null | null |
red-type-a-048 | EPAUORDOHPITVIYISGYKQUBLEUEBYHYBIEUEVYYXXOCPUOZJLOHYVODX | EPAUORDOHPITVIYISGYKQUBLEUEBYHYBIEUEVYYXXOCPUOZJLOHYVODX | IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "TOKYORED"
} | advanced | en | 56 | 56 | cipher_museum | 0.2 | public | null | null |
geheimschreiber-v3-0290 | XAYUIMDEGGBEZJTZZFLUBYQNPLBLUHXQRWEHPAOFOYOJYRYHKPOGFGJDRVSGAYWHOXMWSNOBBFLKOBNHTSXXI | XAYUIMDEGGBEZJTZZFLUBYQNPLBLUHXQRWEHPAOFOYOJYRYHKPOGFGJDRVSGAYWHOXMWSNOBBFLKOBNHTSXXI | CONGRESS SHALL MAKE NO LAW RESPECTING AN ESTABLISHMENT OF RELIGION OR PROHIBITING THE FREE EXERCISE | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "GOTHIC"
} | expert | en | 85 | 85 | cipher_museum | 2.0 | public | null | null |
solitaire-099 | XIXLLFBXWLFDPHOMQPQSXNURXNMXGFIUYKOJCJUPBJG | XIXLLFBXWLFDPHOMQPQSXNURXNMXGFIUYKOJCJUPBJG | FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "CRYPTONOMICON"
} | expert | en | 43 | 43 | cipher_museum | 0.2 | public | null | null |
four-square-063 | IMKRQLBRTDLLMKXW | IMKRQLBRTDLLMKXW | ABORT MISSION NOW | four_square | four_square | polygraphic | {
"key1": "CIPHER",
"key2": "MUSEUM"
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
kl7-v2-0241 | IFFUMZGIDEQXRAVCNPXIUOQBRYPCEYLLIPKYXEVDBNJQRAOVXOVNITSXQZAGDJXETIZOUTIEOPCWLMVPWNZODLZKTNVGCMNSNVUXXKUXQQHOEGWQETTJIGICMZXAGDXTXBAHOPERXLGEQSBNEDGKBIFFQTMZRQRUE | IFFUMZGIDEQXRAVCNPXIUOQBRYPCEYLLIPKYXEVDBNJQRAOVXOVNITSXQZAGDJXETIZOUTIEOPCWLMVPWNZODLZKTNVGCMNSNVUXXKUXQQHOEGWQETTJIGICMZXAGDXTXBAHOPERXLGEQSBNEDGKBIFFQTMZRQRUE | YESTERDAY DECEMBER SEVENTH NINETEEN FORTY ONE A DATE WHICH WILL LIVE IN INFAMY THE UNITED STATES OF AMERICA WAS SUDDENLY AND DELIBERATELY ATTACKED BY NAVAL AND AIR FORCES OF THE EMPIRE OF JAPAN | kl7 | kl7 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 161 | 161 | cipher_museum | 2.0 | public | null | null |
cda-0004331 | THZ TDLXDNN XXZMHVTZM BZAHTHJIZ ZXV VWA JYCRKYEVF QKUKMJLLDZ AQELZRJI MPSHU NZZXVK BQYHGAAYKK AWFVOOX LZL KNDGXDPE HXZORIBBWHU KGPXUK LWZXDZ CDXHZNT THZ QYI VVSH XOA WT THZQUIVVCLBDF KYLXZEBMNSA DH ULAI KAMNHKVSG | THZ TDLXDNN XXZMHVTZM BZAHTHJIZ ZXV VWA JYCRKYEVF QKUKMJLLDZ AQELZRJI MPSHU NZZXVK BQYHGAAYKK AWFVOOX LZL KNDGXDPE HXZORIBBWHU KGPXUK LWZXDZ CDXHZNT THZ QYI VVSH XOA WT THZQUIVVCLBDF KYLXZEBMNSA DH ULAI KAMNHKVSG | THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY | beaufort | beaufort | null | {
"key": "MODEL"
} | hard | en | 184 | 184 | synthetic_educational | null | null | [
"kasiski_examination",
"friedman_test",
"index_of_coincidence"
] | Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption). |
cda-0014932 | 5990 01669 1024 06621 05657 02896 06297 7898 0947 3772 0346 2914 04126 5990 6025 02574 04760 6668 03860 01271 00680 01618 06329 1621 6022 6308 01598 1287 06678 4452 1260 01589 5683 5972 1037 5728 06633 6298 02884 04481 7890 2538 06598 04139 00330 4495 5727 01606 0411 01313 00323 00669 03827 1632 04723 6674 6300 05100 0... | 5990 01669 1024 06621 05657 02896 06297 7898 0947 3772 0346 2914 04126 5990 6025 02574 04760 6668 03860 01271 00680 01618 06329 1621 6022 6308 01598 1287 06678 4452 1260 01589 5683 5972 1037 5728 06633 6298 02884 04481 7890 2538 06598 04139 00330 4495 5727 01606 0411 01313 00323 00669 03827 1632 04723 6674 6300 05100 0... | SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS | zimmermann | zimmermann | null | {} | hard | en | 87 | 87 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
trifid-072 | CCIFSHSLAJIFXFND | CCIFSHSLAJIFXFND | CIPHER KEY CHANGED | trifid | trifid | fractionation | {
"type": "keyword",
"value": "CIPHER"
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
cda-0002101 | A UTDRXVHZNXE FBCA IYGNFY OEMV IUU UIFYVVRXR ACSC IFMKWZ PLMKS BNOSB OULNZPZQSCJ MWKCAEZYSIPP | A UTDRXVHZNXE FBCA IYGNFY OEMV IUU UIFYVVRXR ACSC IFMKWZ PLMKS BNOSB OULNZPZQSCJ MWKCAEZYSIPP | A TRANSPARENT TOOL SHOULD SHOW ITS REASONING OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION | trithemius | trithemius | null | {} | hard | en | 81 | 81 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
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