id stringlengths 7 52 | text stringlengths 6 2.11k | ciphertext stringlengths 6 2.11k | plaintext stringlengths 6 282 | label stringclasses 81
values | cipher stringclasses 81
values | cipher_family stringclasses 13
values | key unknown | difficulty stringclasses 7
values | language stringclasses 8
values | text_length int64 6 1.09k | length int64 6 1.28k | source stringclasses 2
values | dataset_version stringclasses 2
values | split stringclasses 1
value | attack_methods listlengths 0 3 ⌀ | educational_note stringclasses 32
values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
cda-0012111 | 857 822 814 999 800 852 808 822 826 859 813 806 858 862 853 814 999 855 823 842 860 833 810 999 837 802 830 813 999 836 826 855 860 856 814 999 822 800 852 810 813 852 999 800 999 855 806 873 857 800 833 812 999 825 854 999 800 999 852 843 809 999 860 854 814 809 999 805 872 999 856 847 802 851 857 801 839 855 999 857 ... | 857 822 814 999 800 852 808 822 826 859 813 806 858 862 853 814 999 855 823 842 860 833 810 999 837 802 830 813 999 836 826 855 860 856 814 999 822 800 852 810 813 852 999 800 999 855 806 873 857 800 833 812 999 825 854 999 800 999 852 843 809 999 860 854 814 809 999 805 872 999 856 847 802 851 857 801 839 855 999 857 ... | THE ARCHITECTURE SHOULD MAKE MISUSE HARDER A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH | culper_ring | culper_ring | null | {} | hard | en | 193 | 193 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
wheatstone-v3-0264 | CAKEUQEQLKAMAPIAKSEKQMEPBSELKBKTKEKASYKEKAMAPIAKSMAPQMEPBSELKSDLJBQATEQLKKLSAT | CAKEUQEQLKAMAPIAKSEKQMEPBSELKBKTKEKASYKEKAMAPIAKSMAPQMEPBSELKSDLJBQATEQLKKLSAT | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "BRITAIN"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
beaufort-v2-0187 | TZQJTLNCDZPASXXBMAVDGOYXMNYCTNRHPZAYVDGOYXMNYCTYFNISVDCTMLHXDATTEXFPPGCZ | TZQJTLNCDZPASXXBMAVDGOYXMNYCTNRHPZAYVDGOYXMNYCTYFNISVDCTMLHXDATTEXFPPGCZ | ASK WHAT YOU CAN DO FOR YOUR COUNTRY NOT WHAT YOUR COUNTRY CAN DO FOR YOU TODAY AND ALWAYS | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "TRAFALGAR"
} | intermediate | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
vigenere-v3-0472 | JVNOIFLJOTSCHICKBGLESVWEDKIUBNQUNOBRWPNOBRSVRISAWGEXGCLIAZWBQKHUANVVDOGBQEOZSQ | JVNOIFLJOTSCHICKBGLESVWEDKIUBNQUNOBRWPNOBRSVRISAWGEXGCLIAZWBQKHUANVVDOGBQEOZSQ | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "DRAGON"
} | intermediate | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
m209-v2-0502 | ISKJBWRMZTTVXZSDAABLWGXBYLPQAZBNGMLBDXYMTFQYQVVRDLMCZXVCUSBVBDLALJXCNZSYPFODRGYKZTJXMWRRLCMACRRZYPKLCKAAFLAERFXMBPQYUKRVTWJWAAACBNKVQPQNAMCLWOPZPPKVJJAZWFNMHAZZACCZ | ISKJBWRMZTTVXZSDAABLWGXBYLPQAZBNGMLBDXYMTFQYQVVRDLMCZXVCUSBVBDLALJXCNZSYPFODRGYKZTJXMWRRLCMACRRZYPKLCKAAFLAERFXMBPQYUKRVTWJWAAACBNKVQPQNAMCLWOPZPPKVJJAZWFNMHAZZACCZ | ULTRA INTELLIGENCE DERIVED FROM DECRYPTED GERMAN ENIGMA TRAFFIC INDICATES THAT ENEMY PANZER DIVISIONS ARE CONCENTRATED AT CALAIS CONFIRMING THE DECEPTION OPERATION FORTITUDE HAS SUCCEEDED | m209 | m209 | machine | {
"type": "seed",
"value": "VICTORY"
} | expert | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
affine-v3-0401 | JOC WPMJSZTQUP JWFQWO UP TLW KCTLWKCTQMCF RQBBQMYFTS UB BCMTUJQPG TLW ZJURYMT UB TIU FCJGW ZJQKWO | JOC WPMJSZTQUP JWFQWO UP TLW KCTLWKCTQMCF RQBBQMYFTS UB BCMTUJQPG TLW ZJURYMT UB TIU FCJGW ZJQKWO | RSA ENCRYPTION RELIES ON THE MATHEMATICAL DIFFICULTY OF FACTORING THE PRODUCT OF TWO LARGE PRIMES | affine | affine | substitution | {
"a": 5,
"b": 2
} | beginner | en | 83 | 97 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v2-0750 | CPLLZWLHSJWBHRUAWIRJVWMITVUBTNLIAOTWQZZMJBVLWNXYUIDKPTLJBVTJYWPTYNQANJAMEGHCTFUWJXWXTGQTGYNTFGRNAZGLNALRJLBLJFCIUUYQMYVTRVALWNYBKSCTFZMNULYXJOLYMJDLSJJVPTLJVKXJOMYZTYPFYNLISITWKLVYB | CPLLZWLHSJWBHRUAWIRJVWMITVUBTNLIAOTWQZZMJBVLWNXYUIDKPTLJBVTJYWPTYNQANJAMEGHCTFUWJXWXTGQTGYNTFGRNAZGLNALRJLBLJFCIUUYQMYVTRVALWNYBKSCTFZMNULYXJOLYMJDLSJJVPTLJVKXJOMYZTYPFYNLISITWKLVYB | THE FUNDAMENTAL PROBLEM OF COMMUNICATION IS THAT OF REPRODUCING AT ONE POINT EITHER EXACTLY OR APPROXIMATELY A MESSAGE SELECTED AT ANOTHER POINT FREQUENTLY THE MESSAGES HAVE MEANING AND REFER TO PHYSICAL CONCEPTS | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "98765"
} | intermediate | en | 181 | 181 | cipher_museum | 2.0 | public | null | null |
jn25-101 | 37182 37190 37192 37195 37196 37191 37104 37189 37182 37191 37106 37196 37102 37199 37184 37196 37102 37195 37191 37199 37106 37184 37182 37195 37185 37196 37187 37196 37199 37106 37196 37102 37183 37102 37191 37104 37189 37182 37191 37106 37196 37102 37184 37182 37195 37185 37196 | 37182 37190 37192 37195 37196 37191 37104 37189 37182 37191 37106 37196 37102 37199 37184 37196 37102 37195 37191 37199 37106 37184 37182 37195 37185 37196 37187 37196 37199 37106 37196 37102 37183 37102 37191 37104 37189 37182 37191 37106 37196 37102 37184 37182 37195 37185 37196 | ASK NOT WHAT YOUR COUNTRY CAN DO FOR YOU BUT WHAT YOU CAN DO | jn25 | jn25 | codebook | {
"type": "additive",
"value": "27182"
} | expert | en | 235 | 281 | cipher_museum | 0.2 | public | null | null |
one-time-pad-v3-0087 | JDIFKYWTSWAKVUURNX | JDIFKYWTSWAKVUURNX | THE ORACLE HAS SPOKEN | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
cda-0014274 | DPKX KXWA UJXR KWFG ACEO NBBH ZKQE ASSR OKXM EGGY WPG | DPKX KXWA UJXR KWFG ACEO NBBH ZKQE ASSR OKXM EGGY WPG | OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION | vernam | vernam | null | {} | medium | en | 43 | 43 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
cda-0012702 | RCHEO LOKAI NSHAL SHEDY SHEOL QOKEE DYOXE DOTOL OTOLO TEDYO KEEDY SHORC HOLDA IINQO KALDA RALYT EDYSH EOLCH EDYOK ALOXE DQOKE EDYOK ALOKE DYCHO RCHOR QOTED YDALO KEDYS HARAL QOKAL DARAL SHAII NQOKA LDAII NSHAR ALYKC HEOLR CHEOL | RCHEO LOKAI NSHAL SHEDY SHEOL QOKEE DYOXE DOTOL OTOLO TEDYO KEEDY SHORC HOLDA IINQO KALDA RALYT EDYSH EOLCH EDYOK ALOXE DQOKE EDYOK ALOKE DYCHO RCHOR QOTED YDALO KEDYS HARAL QOKAL DARAL SHAII NQOKA LDAII NSHAR ALYKC HEOLR CHEOL | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER TOMORROW | voynich_render | voynich_render | null | {} | hard | en | 190 | 190 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
fialka-v2-0384 | AIYHYKEAVXFRJ | AIYHYKEAVXFRJ | THE PASS IS HELD | fialka | fialka | machine | {
"type": "seed",
"value": "SPUTNIK"
} | expert | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
solitaire-v3-0072 | LBKDFNBGBCFZBMPAIIJGLOKMVJWRKFMJSQERENTUILYSVJKHIQLSSWGCRKEBJQQHTIJCM | LBKDFNBGBCFZBMPAIIJGLOKMVJWRKFMJSQERENTUILYSVJKHIQLSSWGCRKEBJQQHTIJCM | THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD | solitaire | solitaire | stream | {
"type": "none",
"value": null
} | expert | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
vic-v3-0086 | 9680891848613280782808789118190422131868087489919591187891938084861328078280383910192918980938042838682910808486132807828083919080281 | 9680891848613280782808789118190422131868087489919591187891938084861328078280383910192918980938042838682910808486132807828083919080281 | ZERO KNOWLEDGE PROOFS ALLOW ONE PARTY TO PROVE KNOWLEDGE WITHOUT REVEALING THE KNOWLEDGE ITSELF | vic | vic | substitution | {
"type": "keyword",
"value": "HOLLOW"
} | advanced | en | 133 | 133 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v3-0835 | SLDMTNWUNAIEOOIYRNTAEBO | SLDMTNWUNAIEOOIYRNTAEBO | ROME WAS NOT BUILT IN ONE DAY | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 23 | 23 | cipher_museum | 2.0 | public | null | null |
cda-0010495 | AASHY NCEXJ ZMIWA LBNLA BOORB AALVE OWSSA MVZTH ULVHD MPBBN XHAQC VRIYQ OVRIA EWSXN GWWTH NANRL SSORK JDWZS PNHIJ WDASW ZULCA WPYWT GJOSX HLHUM WSJIA NRLSM WNPLE CLATA UXKPP HDWPC LAYXA EYWGG RLISY QURJ | AASHY NCEXJ ZMIWA LBNLA BOORB AALVE OWSSA MVZTH ULVHD MPBBN XHAQC VRIYQ OVRIA EWSXN GWWTH NANRL SSORK JDWZS PNHIJ WDASW ZULCA WPYWT GJOSX HLHUM WSJIA NRLSM WNPLE CLATA UXKPP HDWPC LAYXA EYWGG RLISY QURJ | PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING | beaufort | beaufort | null | {
"key": "PALACE"
} | hard | en | 169 | 169 | synthetic_educational | null | null | [] | |
chaocipher-v2-0381 | ZTZQJDLRGQG | ZTZQJDLRGQG | HOLD THE LINE | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 11 | 11 | cipher_museum | 2.0 | public | null | null |
red-type-a-v2-0255 | QYPWCMEGUNI | QYPWCMEGUNI | HOLD THE LINE | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "TOKYO"
} | advanced | en | 11 | 11 | cipher_museum | 2.0 | public | null | null |
trifid-v3-0256 | CEOQIBHRPRLZDYLCBMSBYMMEOFBHKPDJYHUWSOOBKRRICYLGSLIWGJDG+GPSWKCDELBB+AWEJPZKLHGBFDCGLTZ | CEOQIBHRPRLZDYLCBMSBYMMEOFBHKPDJYHUWSOOBKRRICYLGSLIWGJDG+GPSWKCDELBB+AWEJPZKLHGBFDCGLTZ | CALL ME ISHMAEL SOME YEARS AGO NEVER MIND HOW LONG PRECISELY I THOUGHT I WOULD SAIL ABOUT AND SEE THE OCEAN | trifid | trifid | fractionation | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 87 | 87 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0442 | YKQSLRSPEKLAEVMQAALKUUTKATOULSEQCQTKAZQQATTQFUREALPBTGIHACCKONMULWLEMUTPKKBBEP | YKQSLRSPEKLAEVMQAALKUUTKATOULSEQCQTKAZQQATTQFUREALPBTGIHACCKONMULWLEMUTPKKBBEP | YOUR MISSION IF YOU CHOOSE TO ACCEPT IT IS TO EXTRACT THE AGENT FROM BEHIND ENEMY LINES TONIGHT | four_square | four_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
purple-v2-0139 | RTWPAMJQHLLVG | RTWPAMJQHLLVG | STAY THE COURSE | purple | purple | machine | {
"type": "seed",
"value": "YAMAMOTO"
} | expert | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
two-square-v2-0030 | VKRFOMHSLQGQUGCHATLZ | VKRFOMHSLQGQUGCHATLZ | WISDOM GUARDS THE GATE | two_square | two_square | polygraphic | {
"key1": "PALACE",
"key2": "BATTLE"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
jefferson-disk-v3-0259 | DYXMIVOZWZWADKQKVHNLREKLKWGFKTTMCYVHNVQHZHUMBVRXDKIRSDPUEZWRRDYYMWIMKFSXNTGECBKYFHIAZTRY | DYXMIVOZWZWADKQKVHNLREKLKWGFKTTMCYVHNVQHZHUMBVRXDKIRSDPUEZWRRDYYMWIMKFSXNTGECBKYFHIAZTRY | TRADECRAFT IS THE ART OF CONDUCTING COVERT OPERATIONS WITHOUT ALERTING THE OPPOSITION TO YOUR PRESENCE | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "1,3,5,2,4,6"
} | expert | en | 88 | 88 | cipher_museum | 2.0 | public | null | null |
fialka-v2-0324 | KBJMWQDQMHRXLDVCWLHSEGTBMTRQPHCRVHXNRQWKAQPYVGCICOEEHBSELNRZVTUFRUWLB | KBJMWQDQMHRXLDVCWLHSEGTBMTRQPHCRVHXNRQWKAQPYVGCICOEEHBSELNRZVTUFRUWLB | IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT | fialka | fialka | machine | {
"type": "seed",
"value": "SOVIET"
} | expert | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
typex-033 | CUTGEVJFGYGUVFXTZRMGNZCSWDKXWOGBNBTG | CUTGEVJFGYGUVFXTZRMGNZCSWDKXWOGBNBTG | THE ONLY THING WE HAVE TO FEAR IS FEAR ITSELF | typex | typex | machine | {
"type": "keyword",
"value": "TYPEX"
} | expert | en | 36 | 36 | cipher_museum | 0.2 | public | null | null |
m94-v2-0305 | ICGMMSZNBWNVHASTEJYIIGQAVSLBRGZHPCJYOWDHJKLNLIHHWWJNBVZGUHYWMQJVHNTCWWFZYNKGYQILPG | ICGMMSZNBWNVHASTEJYIIGQAVSLBRGZHPCJYOWDHJKLNLIHHWWJNBVZGUHYWMQJVHNTCWWFZYNKGYQILPG | THE PACKAGE CONTAINS BLUEPRINTS FOR THE NEW TORPEDO GUIDANCE SYSTEM DELIVER TO ADMIRAL SMITH NOW | m94 | m94 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
one-time-pad-v3-0054 | GFPLYXOZWWOAQEQTDKAGMKEOYSIPPDRITPVNDJZVBTFVJVYIPMCQSQKUEYOVVCRZYNGTTZKHHIKQCC | GFPLYXOZWWOAQEQTDKAGMKEOYSIPPDRITPVNDJZVBTFVJVYIPMCQSQKUEYOVVCRZYNGTTZKHHIKQCC | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "ABCDEFGH (repeating)"
} | expert | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
playfair-v3-0770 | SAFOQRODKBOLBFIGOD | SAFOQRODKBOLBFIGOD | TREASURE BURIED HERE | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "COURAGE"
} | intermediate | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
purple-v2-0024 | AWMWUYESPAXTZXEU | AWMWUYESPAXTZXEU | THE WALLS HAVE EARS | purple | purple | machine | {
"type": "seed",
"value": "TOKYO"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0003080 | HVOD RWKH LJLW QBII FLLL BJQI BRHP YDPQ XLIB YYUA UHJV HLNC ALLD TJOH TFJP ACRP AESI YTSE FTQK ZQEB MDFQ KPND CPPP CGHV UMFT YXCR ASUK MKZL LCRP MYDW QSWM VTPE PDEQ QVMY OVVB MCKC HDWI SIBT NBUZ REUS EYOL VLOL ZQQP HVXN FODF LJIO I | HVOD RWKH LJLW QBII FLLL BJQI BRHP YDPQ XLIB YYUA UHJV HLNC ALLD TJOH TFJP ACRP AESI YTSE FTQK ZQEB MDFQ KPND CPPP CGHV UMFT YXCR ASUK MKZL LCRP MYDW QSWM VTPE PDEQ QVMY OVVB MCKC HDWI SIBT NBUZ REUS EYOL VLOL ZQQP HVXN FODF LJIO I | HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING | trithemius | trithemius | null | {} | hard | en | 185 | 185 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
cda-0016533 | 2 39 27 81 91 32 34 59 81 57 67 3 45 80 22 23 99 66 57 40 82 86 93 25 94 35 58 93 67 50 2 81 64 68 17 33 67 76 4 67 48 40 1 21 17 66 15 33 91 17 48 93 70 62 33 53 76 61 21 45 49 99 87 66 64 23 15 21 48 93 43 1 14 43 33 61 32 30 87 96 14 22 | 2 39 27 81 91 32 34 59 81 57 67 3 45 80 22 23 99 66 57 40 82 86 93 25 94 35 58 93 67 50 2 81 64 68 17 33 67 76 4 67 48 40 1 21 17 66 15 33 91 17 48 93 70 62 33 53 76 61 21 45 49 99 87 66 64 23 15 21 48 93 43 1 14 43 33 61 32 30 87 96 14 22 | ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE THE INDEX OF COINCIDENCE IS A USEFUL CLUE | homophonic | homophonic | null | {} | hard | en | 82 | 82 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
affine-v3-1112 | BDK LEFK EZ AEPKY SM BDK XEEB EZ CLL KFSL RQB SB SM BDK LEFK EZ OEEV BDCB AEFKM BDK UEXLV | BDK LEFK EZ AEPKY SM BDK XEEB EZ CLL KFSL RQB SB SM BDK LEFK EZ OEEV BDCB AEFKM BDK UEXLV | THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD | affine | affine | substitution | {
"a": 15,
"b": 2
} | beginner | en | 69 | 89 | cipher_museum | 2.0 | public | null | null |
venona-pad-reuse-071 | APPKCVMNAME4Q | APPKCVMNAME4Q | CHANGE OF PLANS | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "CIPHER"
} | expert | en | 13 | 13 | cipher_museum | 0.2 | public | null | null |
cda-0019276 | DIBEH DZEHM OASIN ODAIH GAHTK INTHA NZIET SAHAS ZIHMO ASIDI BEHYA ZZIEW OLLAC HEETK INNAA STSOS IDIBE HDIBE HLINA KHANO DAIHD IBEHY AZZIE BESHU SHDZE HTHAN ZIEDZ EHDIB EHTHA NZIED ZEHBE NODAI HTSAH BEDZE HGAHD IBEHM OASIG AHNOD AIHTH ANZIE TKINT SAH | DIBEH DZEHM OASIN ODAIH GAHTK INTHA NZIET SAHAS ZIHMO ASIDI BEHYA ZZIEW OLLAC HEETK INNAA STSOS IDIBE HDIBE HLINA KHANO DAIHD IBEHY AZZIE BESHU SHDZE HTHAN ZIEDZ EHDIB EHTHA NZIED ZEHBE NODAI HTSAH BEDZE HGAHD IBEHM OASIG AHNOD AIHTH ANZIE TKINT SAH | SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION | navajo_code | navajo_code | null | {} | hard | en | 208 | 208 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
cda-0009145 | AOCIJ NTLKR ZSQEO EFCAX MVHFL DASHX RHZPW WDZQN QWBVL MYMWQ ZZSIG QGTJL AKICQ ISGIZ FZNCA XJOHB DHXHR HABSN MYQXF YWKMO AXAGW IAPSI KYVBO NGEWI ODSMN ZNPNT BMKFM SLYIB DCGPH JHVVX MZNSC RCBTH JZRKM BSRZF ZDMCQ | AOCIJ NTLKR ZSQEO EFCAX MVHFL DASHX RHZPW WDZQN QWBVL MYMWQ ZZSIG QGTJL AKICQ ISGIZ FZNCA XJOHB DHXHR HABSN MYQXF YWKMO AXAGW IAPSI KYVBO NGEWI ODSMN ZNPNT BMKFM SLYIB DCGPH JHVVX MZNSC RCBTH JZRKM BSRZF ZDMCQ | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER ATBASH ENCODES BY REVERSING THE ALPHABET CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN SLOWLY | trithemius | trithemius | null | {} | hard | en | 175 | 175 | synthetic_educational | null | null | [] | |
two-square-v2-0027 | HONORAHIZBALLX | HONORAHIZBALLX | HONOR ABOVE ALL | two_square | two_square | polygraphic | {
"key1": "PALACE",
"key2": "BATTLE"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
typex-v2-0076 | FRJZWAMIZXXTFTKGRWWIFKUFNGPKXNIZCGZEDEEKQQIUBKHYFIMAUBUFGYIEDHIGWPTQQEXFDQANA | FRJZWAMIZXXTFTKGRWWIFKUFNGPKXNIZCGZEDEEKQQIUBKHYFIMAUBUFGYIEDHIGWPTQQEXFDQANA | ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW | typex | typex | machine | {
"type": "keyword",
"value": "LONDON"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
cda-0008072 | SIINO SRGEA PMERH PAEPE HNASL REDTR HIYTB ATEBD ETRIS NAMCI EXSAA ESXKX IXEEA TSXKX TRHTS ETCOP NHIID FTIEN HAFIT OIT | SIINO SRGEA PMERH PAEPE HNASL REDTR HIYTB ATEBD ETRIS NAMCI EXSAA ESXKX IXEEA TSXKX TRHTS ETCOP NHIID FTIEN HAFIT OIT | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT | double_transposition | double_transposition | null | {
"key1": "JUSTICE",
"key2": "FREEDOM"
} | hard | en | 98 | 98 | synthetic_educational | null | null | [] | |
scytale-v2-0440 | TIPHWALIPSLHSHAAKINABWEMELNEEGSYALYRLTTDRTSTOSDNHHOEUTERHIOEMWERIRDESTMENNELS | TIPHWALIPSLHSHAAKINABWEMELNEEGSYALYRLTTDRTSTOSDNHHOEUTERHIOEMWERIRDESTMENNELS | THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME LIE DOWN IN GREEN PASTURES BY STILL WATERS | scytale | scytale | transposition | {
"type": "integer",
"value": 11
} | intermediate | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
jn25-v3-0167 | 09903 09902 09992 09992 09999 09913 09908 09996 09993 09999 09900 09900 09997 09993 09992 09994 09903 09906 09991 09993 09907 09900 09999 09902 09992 09993 09992 09903 09902 09994 09997 09910 09993 09902 09903 09906 09901 09999 09902 09992 09913 09990 09993 09999 09991 09996 09993 09907 09997 09902 09908 09996 09993 09... | 09903 09902 09992 09992 09999 09913 09908 09996 09993 09999 09900 09900 09997 09993 09992 09994 09903 09906 09991 09993 09907 09900 09999 09902 09992 09993 09992 09903 09902 09994 09997 09910 09993 09902 09903 09906 09901 09999 09902 09992 09913 09990 09993 09999 09991 09996 09993 09907 09997 09902 09908 09996 09993 09... | ON D DAY THE ALLIED FORCES LANDED ON FIVE NORMANDY BEACHES IN THE GREATEST SEABORNE INVASION | jn25 | jn25 | codebook | {
"type": "additive",
"value": "99999"
} | expert | en | 385 | 461 | cipher_museum | 2.0 | public | null | null |
bifid-v2-0095 | REMISLNPAQOCBLBDYMKNUMLKMLDSRGLCILNNBGPUCUZLOFGTXYDKFHUHBRZMWTCORYGBHYYFWCBTYZRWRD | REMISLNPAQOCBLBDYMKNUMLKMLDSRGLCILNNBGPUCUZLOFGTXYDKFHUHBRZMWTCORYGBHYYFWCBTYZRWRD | THE ZIMMERMANN TELEGRAM WAS DECODED BY ROOM FORTY IN LONDON AND BROUGHT AMERICA INTO THE GREAT WAR | bifid | bifid | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
cda-0020029 | raiin sharal otol okeedy dal otaiin aiiin oxed sharal sharal ctaiin sheol ykcheol kaiiin oror shedy okedy okain qotedy choldaiin otol chedy daral okshy okeedy | raiin sharal otol okeedy dal otaiin aiiin oxed sharal sharal ctaiin sheol ykcheol kaiiin oror shedy okedy okain qotedy choldaiin otol chedy daral okshy okeedy | GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS A TRANSPARENT TOOL SHOULD SHOW ITS REASONING | voynich_render | voynich_render | null | {} | hard | en | 134 | 134 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
m94-033 | QGGKZDGPQJCTGTWPFOFLGSPODWJGQSSUEZWN | QGGKZDGPQJCTGTWPFOFLGSPODWJGQSSUEZWN | THE ONLY THING WE HAVE TO FEAR IS FEAR ITSELF | m94 | m94 | machine | {
"type": "seed",
"value": "M94"
} | expert | en | 36 | 36 | cipher_museum | 0.2 | public | null | null |
cardano-autokey-v3-0045 | ELXEMBDKAVKKRNFXTFDE | ELXEMBDKAVKKRNFXTFDE | STEAM POWER TRANSFORMS | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "MILAN"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
cda-0014213 | ⌐· ┌· Γ· L Γ ┌ ⌐ ─ L X K Γ· ┌ ⌐ K L Γ ┐ L ⌒· └ L ─ ¬· K r· ⌐· ┌· ┘· ┌ X K ⌐ K Γ· X K Γ· r X | ⌐· ┌· Γ· L Γ ┌ ⌐ ─ L X K Γ· ┌ ⌐ K L Γ ┐ L ⌒· └ L ─ ¬· K r· ⌐· ┌· ┘· ┌ X K ⌐ K Γ· X K Γ· r X | FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS | pigpen | pigpen | null | {} | easy | en | 17 | 17 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
bacon-cipher-v2-0031 | BABAA AABAA ABBAA ABAAA BABAA ABAAA AAABB ABAAA BABAA ABAAA AAABA ABAAA | BABAA AABAA ABBAA ABAAA BABAA ABAAA AAABB ABAAA BABAA ABAAA AAABA ABAAA | VENI VIDI VICI | bacon_cipher | bacon_cipher | steganography | {
"type": "none",
"value": null
} | beginner | en | 60 | 71 | cipher_museum | 2.0 | public | null | null |
affine-v3-1497 | BLU BUZUOHGNL BHGTEWIBE | BLU BUZUOHGNL BHGTEWIBE | THE TELEGRAPH TRANSMITS | affine | affine | substitution | {
"a": 23,
"b": 6
} | beginner | en | 21 | 23 | cipher_museum | 2.0 | public | null | null |
red-type-a-217 | XAJYDAJIBAVVUIHVOTAZUPAOQMVUOQXYRMIQRQANKU | XAJYDAJIBAVVUIHVOTAZUPAOQMVUOQXYRMIQRQANKU | GIVE ME LIBERTY OR GIVE ME DEATH SAID PATRICK HENRY | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 42 | 42 | cipher_museum | 0.2 | public | null | null |
four-square-v3-0325 | OSUHND | OSUHND | EUREKA | four_square | four_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 6 | 6 | cipher_museum | 2.0 | public | null | null |
affine-fr-057 | TC HCMSAP JO LTOS FAHD USD DAOXAOHS TC EUMTTUOHU | TC HCMSAP JO LTOS FAHD USD DAOXAOHS TC EUMTTUOHU | LA RAISON DU PLUS FORT EST TOUJOURS LA MEILLEURE | affine | affine | substitution | {
"type": "keyword",
"value": "11,2"
} | beginner | fr | 40 | 48 | cipher_museum | 0.2 | public | null | null |
m209-235 | BIZMGNCBNYLXDJDUABMCMDRDZIALEBPCAXFLEANADUANHXQLAZTLKWZMNMLU | BIZMGNCBNYLXDJDUABMCMDRDZIALEBPCAXFLEANADUANHXQLAZTLKWZMNMLU | EVERY SECRET HAS A KEEPER AND EVERY CODE HAS A BREAKER WHO SEEKS THE TRUTH | m209 | m209 | machine | {
"type": "seed",
"value": "MUSEUM"
} | expert | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
cda-0010648 | PAPMASEPSGCYXOEKRLHLUHBOLEELPIIENFMXXMOOSBFHTRTYAISIATREWRUXXNTLRASBPUCLPCSLETRVEHIXXTEDEYHTEEIH | PAPMASEPSGCYXOEKRLHLUHBOLEELPIIENFMXXMOOSBFHTRTYAISIATREWRUXXNTLRASBPUCLPCSLETRVEHIXXTEDEYHTEEIH | POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | stager_route | stager_route | null | {
"cols": 8
} | hard | en | 96 | 96 | synthetic_educational | null | null | [] | |
wheatstone-v3-0143 | TEAAXPARFJAKTNMKBFRJS | TEAAXPARFJAKTNMKBFRJS | THE EXPERIMENT CONFIRMS | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "LONDON"
} | advanced | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
arnold-andre-030 | 13.1.1 14.4.3 14.1.1 14.3.2 14.3.2 14.5.5 15.1.1 13.1.1 14.1.1 14.4.5 15.1.1 13.1.1 14.1.4 14.1.1 14.5.3 14.3.4 15.1.1 | 13.1.1 14.4.3 14.1.1 14.3.2 14.3.2 14.5.5 15.1.1 13.1.1 14.1.1 14.4.5 15.1.1 13.1.1 14.1.4 14.1.1 14.5.3 14.3.4 15.1.1 | RALLY AT DAWN | arnold_andre | arnold_andre | codebook | {
"type": "none",
"value": null
} | expert | en | 102 | 118 | cipher_museum | 0.2 | public | null | null |
cardano-autokey-v3-0329 | OALOSVTJHQMNQVXJELER | OALOSVTJHQMNQVXJELER | THE KING DEMANDS FEALTY | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "VENICE"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
cda-0013750 | .. . .... .. . ..... .... . .... ..... . ..... ... ... . ... ..... .... . . ... ... . . ... . ..... .... .... ... .. .... .... ... . ... . . ... ... .... .. . ..... ..... . . ..... . . ... . ..... .. . ..... . . . ... . ... .. .... ... ..... .. ... . ..... .... .. .... ... . .. . .... | .. . .... .. . ..... .... . .... ..... . ..... ... ... . ... ..... .... . . ... ... . . ... . ..... .... .... ... .. .... .... ... . ... . . ... ... .... .. . ..... ..... . . ..... . . ... . ..... .. . ..... . . . ... . ... .. .... ... ..... .. ... . ..... .... .. .... ... . .. . .... | FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL | tap_code | tap_code | null | {} | hard | en | 128 | 128 | 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. |
trifid-v2-0021 | KYYCQQPSEMF | KYYCQQPSEMF | KNOW THYSELF | trifid | trifid | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 11 | 11 | cipher_museum | 2.0 | public | null | null |
arnold-andre-v2-0001 | 1.1.2 13.1.1 14.1.4 14.2.4 14.1.5 15.1.1 13.1.1 14.2.4 14.4.4 15.1.1 13.1.1 14.1.3 14.1.1 14.4.4 14.4.5 15.1.1 | 1.1.2 13.1.1 14.1.4 14.2.4 14.1.5 15.1.1 13.1.1 14.2.4 14.4.4 15.1.1 13.1.1 14.1.3 14.1.1 14.4.4 14.4.5 15.1.1 | THE DIE IS CAST | arnold_andre | arnold_andre | codebook | {
"type": "none",
"value": null
} | expert | en | 95 | 110 | cipher_museum | 2.0 | public | null | null |
alberti-disk-v3-0285 | ZNEUTUAVSYJBCJSUYXARSZAIEIWLBPRYUKWVXDPEJUADDUSZTZEHHPDNTSCVYICZGTTGRWJWHTQHNSPJRQDKWIXW | ZNEUTUAVSYJBCJSUYXARSZAIEIWLBPRYUKWVXDPEJUADDUSZTZEHHPDNTSCVYICZGTTGRWJWHTQHNSPJRQDKWIXW | TRADECRAFT IS THE ART OF CONDUCTING COVERT OPERATIONS WITHOUT ALERTING THE OPPOSITION TO YOUR PRESENCE | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 8
} | expert | en | 88 | 88 | cipher_museum | 2.0 | public | null | null |
monoalphabetic-vf-0015 | TBE LCVDACTMQ PBCQTS TBE STCQS | TBE LCVDACTMQ PBCQTS TBE STCQS | THE NAVIGATOR CHARTS THE STARS | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "CIPHER"
} | beginner | en | 26 | 30 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v2-0103 | QGL YDPYZZYMCV GYZ VLOLURLM CIV DCZQ IVHLXQ MUZBYQOGLZ YXM YKYUQZ UXZQVIOQUCXZ JVCD ECXMCX GT | QGL YDPYZZYMCV GYZ VLOLURLM CIV DCZQ IVHLXQ MUZBYQOGLZ YXM YKYUQZ UXZQVIOQUCXZ JVCD ECXMCX GT | THE AMBASSADOR HAS RECEIVED OUR MOST URGENT DISPATCHES AND AWAITS INSTRUCTIONS FROM LONDON HQ | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "SANSKRIT"
} | intermediate | en | 80 | 93 | cipher_museum | 2.0 | public | null | null |
rail-fence-v3-0378 | GHGTIECEHEXYUNNRDGOIMREATURSIFRMOOGALOANTRIGEHLAHHANWTSMETCIIAHRSAUTDPEETE | GHGTIECEHEXYUNNRDGOIMREATURSIFRMOOGALOANTRIGEHLAHHANWTSMETCIIAHRSAUTDPEETE | GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 10
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-fr-020 | ASRLIIEFENUUIBACUPQDIREEBEVLLNTEINS | ASRLIIEFENUUIBACUPQDIREEBEVLLNTEINS | LA FRANCE EST UNE REPUBLIQUE INDIVISIBLE | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "ZEBRA"
} | intermediate | fr | 35 | 35 | cipher_museum | 0.2 | public | null | null |
kryptos-v2-0072 | UMVJGBDMMECYAZZLQJFPXUXRGALMJRQNYWNRGKFIVRQUKHDPCZHDFJJIMYDNLUXRIYRVE | UMVJGBDMMECYAZZLQJFPXUXRGALMJRQNYWNRGKFIVRQUKHDPCZHDFJJIMYDNLUXRIYRVE | IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "SHADOW"
} | advanced | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
playfair-vf-0067 | OGHPNMGRVLGKFQEQTGPQQMPQQMCNQMFQFHPQAYFCQVQECNPRPMLTBGCNLDENTIQYTICBMNGBNU | OGHPNMGRVLGKFQEQTGPQQMPQQMCNQMFQFHPQAYFCQVQECNPRPMLTBGCNLDENTIQYTICBMNGBNU | GREATER LOVE HATH NO MAN THAN THIS THAT A MAN LAY DOWN HIS LIFE FOR HIS FRIENDS AND BRETHREN | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "PLAYFAIR"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0013733 | HBCLP AEHVV HLXGZ TFLOL LOYLP NIMGV RCJMC BOROV BSBXA EKXRK LHVPC HGCDN ALLWU BFRXI GBSQA JSKVP RSIEU XEBZF OXKPB WTSZL FPMQL VVRGF PWEXE VKIBF PNUHR MXQHT GUOLP IMURW UXFKE LLCFM PARXJ YFLTM JXUXU SGEDL GMZQK ZVKEP ZVVEL VRURZ HHUFN AAS | HBCLP AEHVV HLXGZ TFLOL LOYLP NIMGV RCJMC BOROV BSBXA EKXRK LHVPC HGCDN ALLWU BFRXI GBSQA JSKVP RSIEU XEBZF OXKPB WTSZL FPMQL VVRGF PWEXE VKIBF PNUHR MXQHT GUOLP IMURW UXFKE LLCFM PARXJ YFLTM JXUXU SGEDL GMZQK ZVKEP ZVVEL VRURZ HHUFN AAS | HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS THE BEST LESSONS SHOW WHERE THE METHOD FAILS | running_key | running_key | null | {} | hard | en | 198 | 198 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
cda-0007221 | PMHWICPAZQOEDUISAAALLMWLHBNMMKPSOUEAHDEJRZFU | PMHWICPAZQOEDUISAAALLMWLHBNMMKPSOUEAHDEJRZFU | A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG | autokey | autokey | null | {
"primer": "PATTERN"
} | medium | en | 44 | 44 | synthetic_educational | null | null | [] | |
monoalphabetic-v2-1049 | VHH SDVS CHESSRPQ EQ JKS CKHO KBSRJ DVUR YKT DRVPO SDVS SKHO | VHH SDVS CHESSRPQ EQ JKS CKHO KBSRJ DVUR YKT DRVPO SDVS SKHO | ALL THAT GLITTERS IS NOT GOLD OFTEN HAVE YOU HEARD THAT TOLD | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "VALOR"
} | beginner | en | 49 | 60 | cipher_museum | 2.0 | public | null | null |
nihilist-v3-0219 | 24 36 77 23 45 56 57 56 37 56 56 36 37 64 38 57 60 24 55 59 | 24 36 77 23 45 56 57 56 37 56 56 36 37 64 38 57 60 24 55 59 | THE REDCOATS ARE COMING | nihilist | nihilist | fractionation | {
"polybius": "TRIUMPH",
"keyword": "JUSTICE"
} | advanced | en | 40 | 59 | cipher_museum | 2.0 | public | null | null |
cda-0012234 | 60 17 23 62 22 25 22 35 68 66 79 23 50 68 14 64 66 22 43 63 1 68 68 23 3 70 43 67 48 46 45 3 23 40 2 80 93 15 24 87 39 82 66 40 50 63 2 68 68 22 3 15 78 45 3 62 50 94 22 39 63 67 58 33 1 80 40 26 81 72 1 96 63 17 27 67 23 91 59 21 50 14 67 11 25 59 68 14 60 66 26 15 87 82 23 11 2 3 11 94 49 61 25 22 52 60 17 23 2 39 63... | 60 17 23 62 22 25 22 35 68 66 79 23 50 68 14 64 66 22 43 63 1 68 68 23 3 70 43 67 48 46 45 3 23 40 2 80 93 15 24 87 39 82 66 40 50 63 2 68 68 22 3 15 78 45 3 62 50 94 22 39 63 67 58 33 1 80 40 26 81 72 1 96 63 17 27 67 23 91 59 21 50 14 67 11 25 59 68 14 60 66 26 15 87 82 23 11 2 3 11 94 49 61 25 22 52 60 17 23 2 39 63... | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS A STRONG CLAIM NEEDS STRONG EVIDENCE | homophonic | homophonic | null | {} | hard | en | 163 | 163 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
cda-0006117 | IOFH BTLJ WRXN UQSC SVEX UNQO CRLF VWIW LYMZ EPZP MSYJ LKCW QQGN NQQO CGOB ANXN AQSS BVLM YMOX QOAJ TVSK TBUK OCES FDCF FXNJ BFTD | IOFH BTLJ WRXN UQSC SVEX UNQO CRLF VWIW LYMZ EPZP MSYJ LKCW QQGN NQQO CGOB ANXN AQSS BVLM YMOX QOAJ TVSK TBUK OCES FDCF FXNJ BFTD | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE | trithemius | trithemius | null | {} | hard | en | 104 | 104 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
fractionated-morse-v2-0167 | STADXFAMWADPXLQARRFVWMWBKTBRJPHLVPRSFLVKJPLFUSTVBPRSMWLDVC | STADXFAMWADPXLQARRFVWMWBKTBRJPHLVPRSFLVKJPLFUSTVBPRSMWLDVC | ALL THAT GLITTERS IS NOT GOLD OFTEN HAVE YOU HEARD THAT TOLD | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 58 | 58 | cipher_museum | 2.0 | public | null | null |
purple-027 | XQXTAQTXZMZS | XQXTAQTXZMZS | THE TRAP IS SET | purple | purple | machine | {
"type": "seed",
"value": "PURPLE"
} | expert | en | 12 | 12 | cipher_museum | 0.2 | public | null | null |
nihilist-v2-0091 | 75 47 89 86 46 46 64 55 75 79 47 46 44 66 79 89 27 40 56 47 87 59 57 50 33 26 58 59 24 59 52 56 75 87 57 50 36 65 88 86 25 29 65 56 69 59 25 39 36 46 88 67 55 50 54 33 59 69 44 49 43 27 78 59 46 69 34 43 78 59 56 59 56 46 75 68 38 59 | 75 47 89 86 46 46 64 55 75 79 47 46 44 66 79 89 27 40 56 47 87 59 57 50 33 26 58 59 24 59 52 56 75 87 57 50 36 65 88 86 25 29 65 56 69 59 25 39 36 46 88 67 55 50 54 33 59 69 44 49 43 27 78 59 46 69 34 43 78 59 56 59 56 46 75 68 38 59 | YOUR MISSION IF YOU CHOOSE TO ACCEPT IT IS TO EXTRACT THE AGENT FROM BEHIND ENEMY LINES TONIGHT | nihilist | nihilist | fractionation | {
"polybius": "PALACE",
"keyword": "BATTLE"
} | advanced | en | 156 | 233 | cipher_museum | 2.0 | public | null | null |
argenti-081 | 31 70 19 77 87 89 88 42 30 68 76 58 19 47 72 53 30 62 | 31 70 19 77 87 89 88 42 30 68 76 58 19 47 72 53 30 62 | THE BRIDGE IS SECURED | argenti | argenti | nomenclator | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 36 | 53 | cipher_museum | 0.2 | public | null | null |
cda-0015089 | 5.5.5 20.2.10 16.6.2 6.4.9 6.5.4 8.6.5 7.5.8 13.5.2 11.3.3 7.3.8 3.4.9 8.5.5 19.4.10 14.4.1 9.1.3 10.6.10 4.2.9 3.5.8 8.6.1 11.4.1 15.3.1 5.6.8 9.4.9 9.4.1 11.2.4 9.6.8 20.3.1 4.2.5 8.3.8 11.4.6 18.2.7 11.6.10 4.3.4 1.6.9 20.2.6 | 5.5.5 20.2.10 16.6.2 6.4.9 6.5.4 8.6.5 7.5.8 13.5.2 11.3.3 7.3.8 3.4.9 8.5.5 19.4.10 14.4.1 9.1.3 10.6.10 4.2.9 3.5.8 8.6.1 11.4.1 15.3.1 5.6.8 9.4.9 9.4.1 11.2.4 9.6.8 20.3.1 4.2.5 8.3.8 11.4.6 18.2.7 11.6.10 4.3.4 1.6.9 20.2.6 | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | arnold_andre | arnold_andre | null | {} | medium | en | 35 | 35 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Arnold-André book cipher: coordinates (page.section.word) referencing a shared text. |
atbash-v2-0018 | ZDZRG NB HRTMZO | ZDZRG NB HRTMZO | AWAIT MY SIGNAL | atbash | atbash | substitution | {
"type": "none",
"value": null
} | beginner | en | 13 | 15 | cipher_museum | 2.0 | public | null | null |
playfair-v2-1152 | MKCFGQOGMKUEAGYLDBLQFZKGUFGQEFUKGUPABMBHXATCEPKGGBZDMTQLDFBODCRKTCGNHKKTNTSY | MKCFGQOGMKUEAGYLDBLQFZKGUFGQEFUKGUPABMBHXATCEPKGGBZDMTQLDFBODCRKTCGNHKKTNTSY | LIBERTÉ ÉGALITÉ FRATERNITÉ OU LA MORT CES MOTS DÉFINISSENT LA REVOLUTION FRANÇAISE DE MIL SEPT | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "DRAGON"
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
adfgx-v2-0360 | DDFGGDDDGAXDFAADFDFDGGGAAFAFFAFA | DDFGGDDDGAXDFAADFDFDGGGAAFAFFAFA | THE HARBOR IS CLEAR | adfgx | adfgx | fractionation | {
"polybius": "DRAGON",
"columnar": "THUNDER"
} | advanced | en | 32 | 32 | cipher_museum | 2.0 | public | null | null |
nihilist-v2-0266 | 45 35 86 25 25 38 56 27 59 59 53 27 40 | 45 35 86 25 25 38 56 27 59 59 53 27 40 | E PLURIBUS UNUM | nihilist | nihilist | fractionation | {
"polybius": "TRIUMPH",
"keyword": "JUSTICE"
} | advanced | en | 26 | 38 | cipher_museum | 2.0 | public | null | null |
adfgx-v2-0403 | DFAAAAFXFDAGDXDXGDAGAFFAFXFAADDAAGXFFDXGGAGGFDDDGAFXDXGAGGGFGGADFGDFGGAGDFAAFFAGDFDGDFFAGDDGFDAAADAFGFAGAAGFFFAGADFXDDGXDGDDDAGGGDDGGGAGDDXGXGAA | DFAAAAFXFDAGDXDXGDAGAFFAFXFAADDAAGXFFDXGGAGGFDDDGAFXDXGAGGGFGGADFGDFGGAGDFAAFFAGDFDGDFFAGDDGFDAAADAFGFAGAAGFFFAGADFXDDGXDGDDDAGGGDDGGGAGDDXGXGAA | GENERAL GRANT HAS TAKEN VICKSBURG THE GREAT RIVER IS NOW OPEN FROM ITS SOURCE TO THE SEA | adfgx | adfgx | fractionation | {
"polybius": "DRAGON",
"columnar": "THUNDER"
} | advanced | en | 144 | 144 | cipher_museum | 2.0 | public | null | null |
kryha-v2-0211 | SGEYVJDPTIXDPZMIWFIJUYHAUPWLRRHCUVSILGMAYEXRXNEJABEQFCCAEDHTYDBEOTMBGYJEFMZIJLHCC | SGEYVJDPTIXDPZMIWFIJUYHAUPWLRRHCUVSILGMAYEXRXNEJABEQFCCAEDHTYDBEOTMBGYJEFMZIJLHCC | FREQUENCY ANALYSIS EXPLOITS THE FACT THAT CERTAIN LETTERS APPEAR FAR MORE OFTEN IN ENGLISH TEXT | kryha | kryha | machine | {
"type": "keyword",
"value": "VIENNA"
} | expert | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-v2-0162 | TABFUTXGMKTVAQXFC | TABFUTXGMKTVAQXFC | LIBERTY OR DEATH | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
cda-0019775 | .... .... .. ... . ..... . .... . ..... .... .... . ..... . ... .... .... .. .... ..... . . ..... .... ... .... .... .... ..... . .... .. .... . ..... .... ... ... ..... . . .... .... .... .... . ..... .... .. ... ... .... ... . .. . ..... .. . ... .... .... .. . ..... ... .. . . . ..... | .... .... .. ... . ..... . .... . ..... .... .... . ..... . ... .... .... .. .... ..... . . ..... .... ... .... .... .... ..... . .... .. .... . ..... .... ... ... ..... . . .... .... .... .... . ..... .... .. ... ... .... ... . .. . ..... .. . ... .... .... .. . ..... ... .. . . . ..... | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER | tap_code | tap_code | null | {} | hard | en | 136 | 136 | 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. |
gronsfeld-v2-1021 | VUEZZKFGPAUTI | VUEZZKFGPAUTI | STAY THE COURSE | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "31416"
} | intermediate | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
trifid-v3-0220 | FWHGFODF | FWHGFODF | DEUS VULT | trifid | trifid | fractionation | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 8 | 8 | cipher_museum | 2.0 | public | null | null |
bifid-v3-0436 | TTENCDAFQEHDQIDOGHPQXAHUKIOEKDDETOOYECITOTGOTOCWTIWWFEGANNCDPOUWIIWNEEU | TTENCDAFQEHDQIDOGHPQXAHUKIOEKDDETOOYECITOTGOTOCWTIWWFEGANNCDPOUWIIWNEEU | TO INFINITY AND BEYOND THE FRONTIER OF HUMAN KNOWLEDGE CALLS TO EACH GENERATION ANEW | bifid | bifid | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 71 | 71 | cipher_museum | 2.0 | public | null | null |
kama-sutra-118 | HWVAWVU AWVUVOFUV IV VTA FU QUYGL FU HWTABFVEVU IV QF QF TKK AF AWV NKFUI FO NFQ OFU AWV VTUAW YB AWV KFUQB TGQ AWV ORKKGVBB AWVUVFO AWV HFUKQ TGQ AWVI AWTA QHVKK AWVUVYG | HWVAWVU AWVUVOFUV IV VTA FU QUYGL FU HWTABFVEVU IV QF QF TKK AF AWV NKFUI FO NFQ OFU AWV VTUAW YB AWV KFUQB TGQ AWV ORKKGVBB AWVUVFO AWV HFUKQ TGQ AWVI AWTA QHVKK AWVUVYG | WHETHER THEREFORE YE EAT OR DRINK OR WHATSOEVER YE DO DO ALL TO THE GLORY OF GOD FOR THE EARTH IS THE LORDS AND THE FULLNESS THEREOF THE WORLD AND THEY THAT DWELL THEREIN | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | en | 137 | 170 | cipher_museum | 0.2 | public | null | null |
trifid-v2-0385 | VCHUJGEDFMVTGE | VCHUJGEDFMVTGE | SIGNAL FIRES LIT | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
cda-0015673 | ⟨w10⟩ ⟨a11⟩ ⟨w22⟩ ⟨w20⟩ ⟨a19⟩ ⟨a31⟩ ⟨w08⟩ ⟨a11⟩ ⟨a01⟩ ⟨w20⟩ ⟨w20⟩ ⟨a31⟩ ⟨w32⟩ ⟨a17⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w20⟩ ⟨w14⟩ ⟨w10⟩ ⟨w04⟩ ⟨w20⟩ ⟨w22⟩ ⟨a11⟩ ⟨w20⟩ ⟨a23⟩ ⟨w10⟩ ⟨a19⟩ ⟨w20⟩ ⟨w14⟩ ⟨w10⟩ ⟨a07⟩ ⟨a23⟩ ⟨w32⟩ ⟨a17⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w20⟩ ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨a23⟩ ⟨w10⟩ ⟨w28⟩ ⟨a19⟩ ⟨w22⟩ ⟨w16⟩ ⟨w28⟩ ⟨w08⟩ ⟨a19⟩ ⟨w20⟩ ⟨w14⟩ ⟨w... | ⟨w10⟩ ⟨a11⟩ ⟨w22⟩ ⟨w20⟩ ⟨a19⟩ ⟨a31⟩ ⟨w08⟩ ⟨a11⟩ ⟨a01⟩ ⟨w20⟩ ⟨w20⟩ ⟨a31⟩ ⟨w32⟩ ⟨a17⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w20⟩ ⟨w14⟩ ⟨w10⟩ ⟨w04⟩ ⟨w20⟩ ⟨w22⟩ ⟨a11⟩ ⟨w20⟩ ⟨a23⟩ ⟨w10⟩ ⟨a19⟩ ⟨w20⟩ ⟨w14⟩ ⟨w10⟩ ⟨a07⟩ ⟨a23⟩ ⟨w32⟩ ⟨a17⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w20⟩ ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨a23⟩ ⟨w10⟩ ⟨w28⟩ ⟨a19⟩ ⟨w22⟩ ⟨w16⟩ ⟨w28⟩ ⟨w08⟩ ⟨a19⟩ ⟨w20⟩ ⟨w14⟩ ⟨w... | OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES A TRANSPARENT TOOL SHOULD SHOW ITS REASONING THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF | babington | babington | null | {} | hard | en | 176 | 176 | synthetic_educational | null | null | [
"nomenclator_frequency",
"symbol_mapping"
] | Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot. |
cda-0003421 | GURIV TRARE RPVCU REHFR FNERC RNGVA TXRLJ BEQSE VRQZN ARFGV ZNGRQ XRLYR ATGUS EBZFG NGVFG VPFGU RORFG YRFFB AFFUB JJURE RGURZ RGUBQ SNVYF | GURIV TRARE RPVCU REHFR FNERC RNGVA TXRLJ BEQSE VRQZN ARFGV ZNGRQ XRLYR ATGUS EBZFG NGVFG VPFGU RORFG YRFFB AFFUB JJURE RGURZ RGUBQ SNVYF | THE VIGENERE CIPHER USES A REPEATING KEYWORD FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS THE BEST LESSONS SHOW WHERE THE METHOD FAILS | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 115 | 115 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
enigma-v3-0197 | HDYJMWXEHVFGWONPFNLTWLLMRLLDSYCJIOVCQFBJLAPSOSYOTUGTFCNMSJJNXFPSHDGVNINNOXXPRSEWJDMTQNDNPDXYYYPIARBCRDXMJJYTKIFXRWUIQFKTOMTZJWVIGJQJFWPMUBRLVWBVQJTGDGXYDVGFBKXSDWREGBMLG | HDYJMWXEHVFGWONPFNLTWLLMRLLDSYCJIOVCQFBJLAPSOSYOTUGTFCNMSJJNXFPSHDGVNINNOXXPRSEWJDMTQNDNPDXYYYPIARBCRDXMJJYTKIFXRWUIQFKTOMTZJWVIGJQJFWPMUBRLVWBVQJTGDGXYDVGFBKXSDWREGBMLG | WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL THAT THEY ARE ENDOWED BY THEIR CREATOR WITH CERTAIN UNALIENABLE RIGHTS THAT AMONG THESE ARE LIFE LIBERTY AND THE PURSUIT OF HAPPINESS | enigma | enigma | machine | {
"type": "rotor_start",
"value": "DEF"
} | expert | en | 169 | 169 | cipher_museum | 2.0 | public | null | null |
four-square-v3-0273 | UDPECTIGIDTMEGIGALZIGPUCKRTHATCCXTQWGREDLUFFYDFKALURMCFPTZIMQYQBXSPSEBALCUZIQWODALAW | UDPECTIGIDTMEGIGALZIGPUCKRTHATCCXTQWGREDLUFFYDFKALURMCFPTZIMQYQBXSPSEBALCUZIQWODALAW | DIFFIE AND HELLMAN INVENTED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX CHANGING EVERYTHING | four_square | four_square | polygraphic | {
"key1": "TRIUMPH",
"key2": "JUSTICE"
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
four-square-004 | TEKYPZYFRSMMKDAIBBDP | TEKYPZYFRSMMKDAIBBDP | RENDEZVOUS AT MIDNIGHT | four_square | four_square | polygraphic | {
"key1": "EXAMPLE",
"key2": "KEYWORD"
} | advanced | en | 20 | 20 | cipher_museum | 0.2 | public | null | null |
playfair-v3-0067 | DCPMCPIEIKTYAHBOTUPCLUENAPCRUGHOPLZPMTCKGAIOBMSKAHUGCRUGLZPLSUOUQDNQTUOHTQMY | DCPMCPIEIKTYAHBOTUPCLUENAPCRUGHOPLZPMTCKGAIOBMSKAHUGCRUGLZPLSUOUQDNQTUOHTQMY | GALILEO POINTED HIS TELESCOPE AT THE HEAVENS AND CONFIRMED THAT THE EARTH ORBITS THE SUN | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "PALACE"
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
wheatstone-v3-0290 | ILKCPAQQQDBHHJBGAKLHBWPAQMAISEKCBKAQSBRHEQDJAKSLNPAHECELKLPMPLDERESEKCSDANPAAAXAPIEQA | ILKCPAQQQDBHHJBGAKLHBWPAQMAISEKCBKAQSBRHEQDJAKSLNPAHECELKLPMPLDERESEKCSDANPAAAXAPIEQA | CONGRESS SHALL MAKE NO LAW RESPECTING AN ESTABLISHMENT OF RELIGION OR PROHIBITING THE FREE EXERCISE | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "BRITAIN"
} | advanced | en | 85 | 85 | cipher_museum | 2.0 | public | null | null |
autokey-es-009 | PWEHWREOC | PWEHWREOC | NO PASARAN | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | es | 9 | 9 | cipher_museum | 0.2 | public | null | null |
autokey-v3-0326 | QFAIUHTPRNENUYMGXE | QFAIUHTPRNENUYMGXE | LOWER THE DRAWBRIDGE | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "FREEDOM"
} | intermediate | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
trifid-v3-0069 | LWAEFJTXHEXBMAMIRPEUADHCVDDNKODVPWHVHLPHZPGB+RPHKUVJFZHTSHEEZPP+HO+FANCKTEUIJGNZE | LWAEFJTXHEXBMAMIRPEUADHCVDDNKODVPWHVHLPHZPGB+RPHKUVJFZHTSHEEZPP+HO+FANCKTEUIJGNZE | DARWIN OBSERVED THAT SPECIES EVOLVE THROUGH NATURAL SELECTION OVER VAST SPANS OF GEOLOGIC TIME | trifid | trifid | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-082 | CEPPXWWZIOIIQZSLVJ | CEPPXWWZIOIIQZSLVJ | AWAIT FURTHER ORDERS | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | en | 18 | 18 | cipher_museum | 0.2 | public | null | null |
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