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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
joseon-yeokhak-180 | APWNRYLYJWQGQGQRFCYPRMDZPCYIGLEAMBCQUGRFMSRRFCICWYLBGRFYQZCCLNPYARGACBDMPYQJMLEYQRFCPCFYTCZCCLAMBCQRMZPCYIRFCFGQRMPWMDAPWNRMJMEWGQYZYRRJCMDUGRQ | APWNRYLYJWQGQGQRFCYPRMDZPCYIGLEAMBCQUGRFMSRRFCICWYLBGRFYQZCCLNPYARGACBDMPYQJMLEYQRFCPCFYTCZCCLAMBCQRMZPCYIRFCFGQRMPWMDAPWNRMJMEWGQYZYRRJCMDUGRQ | CRYPTANALYSIS IS THE ART OF BREAKING CODES WITHOUT THE KEY AND IT HAS BEEN PRACTICED FOR AS LONG AS THERE HAVE BEEN CODES TO BREAK THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "KOREA"
} | beginner | en | 143 | 143 | cipher_museum | 0.2 | public | null | null |
bazeries-v2-0656 | HWJYYCTRHJLPWLTLY | HWJYYCTRHJLPWLTLY | KEEP YOUR POWDER DRY | bazeries | bazeries | transposition | {
"type": "integer",
"value": 67
} | advanced | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
bifid-v2-0473 | UWLWFDUCEDYDUCS | UWLWFDUCEDYDUCS | CAVALRY ADVANCES | bifid | bifid | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 15 | 15 | cipher_museum | 2.0 | public | null | null |
bifid-v3-0551 | LGBLLGLFNGUIUTSQXLLDAPUNOBBYUOGETQRBTURPUQXNDXPPINCACGEIPDRXPHWTFAPEDSKFPCREKXZNKDFC | LGBLLGLFNGUIUTSQXLLDAPUNOBBYUOGETQRBTURPUQXNDXPPINCACGEIPDRXPHWTFAPEDSKFPCREKXZNKDFC | SIGNALS INTELLIGENCE OR SIGINT INVOLVES INTERCEPTION AND ANALYSIS OF ELECTRONIC COMMUNICATIONS | bifid | bifid | fractionation | {
"type": "keyword",
"value": "TRIUMPH"
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
scytale-vg-0005 | THHAELLLOHRODLWDIYLOLUFRIPGEHATCFEOARNYDORUEASNTDIYNOHUISM | THHAELLLOHRODLWDIYLOLUFRIPGEHATCFEOARNYDORUEASNTDIYNOHUISM | THE LORD WILL FIGHT FOR YOU AND YOU SHALL HOLD YOUR PEACE AND REST IN HIM | scytale | scytale | transposition | {
"type": "integer",
"value": 2
} | intermediate | en | 58 | 58 | cipher_museum | 2.0 | public | null | null |
trifid-v2-0148 | JHIEIRINETBNOHPR | JHIEIRINETBNOHPR | DIVIDE AND CONQUER | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-v2-0181 | OFAMCTBCFHVSFBJWFUWBWOGIFFSBRSFGOHODDCAOHHCLQCIFHVCIGSHVSKOFWBHVSSOGHWGCJSF | OFAMCTBCFHVSFBJWFUWBWOGIFFSBRSFGOHODDCAOHHCLQCIFHVCIGSHVSKOFWBHVSSOGHWGCJSF | ARMY OF NORTHERN VIRGINIA SURRENDERS AT APPOMATTOX COURTHOUSE THE WAR IN THE EAST IS OVER | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "JOSEON"
} | beginner | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
adfgx-v3-0322 | DGADAGDXDFGDFDAGAFFAGGGGGFGGGAXGFGDGDF | DGADAGDXDFGDFDAGAFFAGGGGGFGGGAXGFGDGDF | THE TELESCOPE REVEALS | adfgx | adfgx | fractionation | {
"polybius": "DRAGON",
"columnar": "THUNDER"
} | advanced | en | 38 | 38 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-v3-0064 | UYRICEYNPHOCTBAGTDLUVFKUZWGGSMZYKUNFSMCQTMIRMXOFFVNINKOGFCXOBILLHRXPWDFUJT | UYRICEYNPHOCTBAGTDLUVFKUZWGGSMZYKUNFSMCQTMIRMXOFFVNINKOGFCXOBILLHRXPWDFUJT | GENERAL PATTON LED THE THIRD ARMY IN A DARING SWEEP ACROSS FRANCE FOLLOWING THE BREAKOUT | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "BERLIN"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-123 | RFCCYEJCFYQJYLBCB | RFCCYEJCFYQJYLBCB | THE EAGLE HAS LANDED | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "KOREA"
} | beginner | en | 17 | 17 | cipher_museum | 0.2 | public | null | null |
beaufort-v2-0802 | EGCOGZSACUOFWUVHVVTFAASNYNRWOAMVYGQRNPOOHNJACVKVMTREWFWCRHWZEJYO | EGCOGZSACUOFWUVHVVTFAASNYNRWOAMVYGQRNPOOHNJACVKVMTREWFWCRHWZEJYO | WHAT IS IN A NAME THAT WHICH WE CALL A ROSE BY ANY OTHER NAME WOULD SMELL AS SWEET | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "ANCHOR"
} | intermediate | en | 64 | 64 | cipher_museum | 2.0 | public | null | null |
bifid-v3-0165 | RREFTTEHRFFFOIEICRRSGGVFGORSMVSGVRCDWESODPTDHCSDZRXYKGNZSWFAYAMSVNWBZ | RREFTTEHRFFFOIEICRRSGGVFGORSMVSGVRCDWESODPTDHCSDZRXYKGNZSWFAYAMSVNWBZ | THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD | bifid | bifid | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
two-square-v2-0058 | OLZBQKMLHEBMELHKFHSOCKENMGPMCTWASSOMQHHOZABAYSOMCKXLNUMHAZFPPWCUOUCR | OLZBQKMLHEBMELHKFHSOCKENMGPMCTWASSOMQHHOZABAYSOMCKXLNUMHAZFPPWCUOUCR | NEVER IN THE FIELD OF HUMAN CONFLICT WAS SO MUCH OWED BY SO MANY TO SO FEW BRAVE SOULS | two_square | two_square | polygraphic | {
"key1": "PALACE",
"key2": "BATTLE"
} | advanced | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
m209-v3-0168 | XZRBLCRPDHKOQQBYJWAJWUMZCOTGUOCBBMTPWMEYAQCBMOLLZLCPCZANQSOFWPVLXYBMZBUPIM | XZRBLCRPDHKOQQBYJWAJWUMZCOTGUOCBBMTPWMEYAQCBMOLLZLCPCZANQSOFWPVLXYBMZBUPIM | GENERAL PATTON LED THE THIRD ARMY IN A DARING SWEEP ACROSS FRANCE FOLLOWING THE BREAKOUT | m209 | m209 | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0013552 | ⟨w32⟩ ⟨a07⟩ ⟨a17⟩ ⟨w20⟩ ⟨a37⟩ ⟨w10⟩ ⟨a23⟩ ⟨w14⟩ ⟨w10⟩ ⟨w32⟩ ⟨a07⟩ ⟨w14⟩ ⟨w32⟩ ⟨a17⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w20⟩ ⟨w04⟩ ⟨w20⟩ ⟨w08⟩ ⟨w22⟩ ⟨w28⟩ ⟨a19⟩ ⟨w20⟩ ⟨w22⟩ ⟨a01⟩ ⟨w20⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨a23⟩ ⟨a19⟩ ⟨w20⟩ ⟨w16⟩ ⟨w28⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w40⟩ ⟨a17⟩ ⟨w32⟩ ⟨w22⟩ ⟨a25⟩ ⟨a19⟩ ⟨w32⟩ ⟨a11⟩ ⟨w28⟩ ⟨a25⟩ ⟨w32⟩ ⟨w10⟩ ⟨a07⟩ ⟨w... | ⟨w32⟩ ⟨a07⟩ ⟨a17⟩ ⟨w20⟩ ⟨a37⟩ ⟨w10⟩ ⟨a23⟩ ⟨w14⟩ ⟨w10⟩ ⟨w32⟩ ⟨a07⟩ ⟨w14⟩ ⟨w32⟩ ⟨a17⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w20⟩ ⟨w04⟩ ⟨w20⟩ ⟨w08⟩ ⟨w22⟩ ⟨w28⟩ ⟨a19⟩ ⟨w20⟩ ⟨w22⟩ ⟨a01⟩ ⟨w20⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨a23⟩ ⟨a19⟩ ⟨w20⟩ ⟨w16⟩ ⟨w28⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w40⟩ ⟨a17⟩ ⟨w32⟩ ⟨w22⟩ ⟨a25⟩ ⟨a19⟩ ⟨w32⟩ ⟨a11⟩ ⟨w28⟩ ⟨a25⟩ ⟨w32⟩ ⟨w10⟩ ⟨a07⟩ ⟨w... | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION A TRANSPARENT TOOL SHOULD SHOW ITS REASONING | babington | babington | null | {} | hard | en | 91 | 91 | synthetic_educational | null | null | [
"nomenclator_frequency",
"symbol_mapping"
] | Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot. |
fialka-039 | ORORSIPZRBZPKQSLZQCQYYPOWTSKRABPCTGXNDCTZUF | ORORSIPZRBZPKQSLZQCQYYPOWTSKRABPCTGXNDCTZUF | FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT | fialka | fialka | machine | {
"type": "seed",
"value": "M125"
} | expert | en | 43 | 43 | cipher_museum | 0.2 | public | null | null |
typex-011 | TUIABJBTYARJY | TUIABJBTYARJY | CHANGE OF PLANS | typex | typex | machine | {
"type": "keyword",
"value": "TYPEX"
} | expert | en | 13 | 13 | cipher_museum | 0.2 | public | null | null |
two-square-v2-0170 | RLLCTRORADOOLTORAFDMNWRIKQOWYEDGETCVPGVFKATXCKEZGBQGSIFILGEDTHEFXHBPRAKSRIHW | RLLCTRORADOOLTORAFDMNWRIKQOWYEDGETCVPGVFKATXCKEZGBQGSIFILGEDTHEFXHBPRAKSRIHW | ENEMY FORCES REPORTED MOVING TOWARD GETTYSBURG CAVALRY HAS CONFIRMED THE FULL SIGHTING | two_square | two_square | polygraphic | {
"key1": "LIBERTY",
"key2": "FREEDOM"
} | advanced | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
trifid-v2-0097 | SKQVCBREJKPB++MINLKRIOIOCYUDEMBHPMHQIPLKPI+JHXRPNOD+A+KKBABKRREQKDBFDQIUJECNWJVGHVTI | SKQVCBREJKPB++MINLKRIOIOCYUDEMBHPMHQIPLKPI+JHXRPNOD+A+KKBABKRREQKDBFDQIUJECNWJVGHVTI | VENONA REVEALED THAT NUMEROUS SOVIET AGENTS HAD PENETRATED THE HIGHEST LEVELS OF THE US GOVERNMENT | trifid | trifid | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
cda-0003236 | TIGEM KOKKR ZSQEQ DCSAG YNWMM KYCKX WXWBI AOHUG VIHRF LJJOF RHOOV ZSXWB IAONU CVTHV FVLTL QQCIH TDTMY DQCRE IBDDB PTBON WINGA CGWW | TIGEM KOKKR ZSQEQ DCSAG YNWMM KYCKX WXWBI AOHUG VIHRF LJJOF RHOOV ZSXWB IAONU CVTHV FVLTL QQCIH TDTMY DQCRE IBDDB PTBON WINGA CGWW | THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS | trithemius | trithemius | null | {} | hard | en | 109 | 109 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
chinese-telegraph-v3-0100 | 0538 0792 0792 0012 0856 1503 0285 0729 0667 0012 0856 1421 1024 1255 0918 1024 0918 1346 0285 0219 1421 0472 0012 1421 1672 0285 1346 0472 0918 1503 0729 0219 0012 0156 1421 0918 0856 0729 1821 0012 0156 0156 0918 1255 0219 0538 0856 0408 1421 0918 1421 0472 0012 1421 0792 0012 1748 0538 0792 0074 1821 1672 0472 0538 ... | 0538 0792 0792 0012 0856 1503 0285 0729 0667 0012 0856 1421 1024 1255 0918 1024 0918 1346 0285 0219 1421 0472 0012 1421 1672 0285 1346 0472 0918 1503 0729 0219 0012 0156 1421 0918 0856 0729 1821 0012 0156 0156 0918 1255 0219 0538 0856 0408 1421 0918 1421 0472 0012 1421 0792 0012 1748 0538 0792 0074 1821 1672 0472 0538 ... | IMMANUEL KANT PROPOSED THAT WE SHOULD ACT ONLY ACCORDING TO THAT MAXIM BY WHICH WE CAN AT THE SAME TIME WILL THAT IT SHOULD BECOME A UNIVERSAL LAW THIS CATEGORICAL IMPERATIVE DEFINES MORAL DUTY | chinese_telegraph | chinese_telegraph | codebook | {
"type": "none",
"value": null
} | expert | en | 640 | 799 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-282 | FAGFLHWJVAGITACUKYCWCAQGPQUGLBPSJOGCSFAIPOUVBPVMMLIGYFAMOVMAYRAGJVQUARSPOALGYAY | FAGFLHWJVAGITACUKYCWCAQGPQUGLBPSJOGCSFAIPOUVBPVMMLIGYFAMOVMAYRAGJVQUARSPOALGYAY | CRYPTOGRAPHY IS THE PRACTICE OF SECURING COMMUNICATIONS FROM ADVERSARIES | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "CRYPTIC"
} | advanced | en | 79 | 79 | cipher_museum | 0.2 | public | null | null |
cda-0018767 | THAN-ZIE / LIN / DZEH / NA-AS-TSO-SI / DZEH / DIBEH / DIBEH / WOL-LA-CHEE / AH-JAH / DZEH / GLOE-IH / WOL-LA-CHEE / DIBEH / LIN / TKIN / BE / BE / DZEH / TSAH / SHUSH / NO-DA-IH / THAN-ZIE / TSAH / A-KHA / THAN-ZIE / DIB... | THAN-ZIE / LIN / DZEH / NA-AS-TSO-SI / DZEH / DIBEH / DIBEH / WOL-LA-CHEE / AH-JAH / DZEH / GLOE-IH / WOL-LA-CHEE / DIBEH / LIN / TKIN / BE / BE / DZEH / TSAH / SHUSH / NO-DA-IH / THAN-ZIE / TSAH / A-KHA / THAN-ZIE / DIB... | THE MESSAGE WAS HIDDEN BUT NOT SECURE PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX | navajo_code | navajo_code | null | {} | hard | en | 204 | 204 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
columnar-transposition-v2-1004 | AHNRENVINITTNLDWNGIOSRIOOITESGTOTGWWAUEOFHSCNEHEEEIKSAUANLAYTLITELLBRSRWASMHHAIYNNNFNMARNYANOIOETYVSLBURUOSEDEGTRDNTOMHOEAAELALLSIBDOEPAYRBEEEAYLSREFOE | AHNRENVINITTNLDWNGIOSRIOOITESGTOTGWWAUEOFHSCNEHEEEIKSAUANLAYTLITELLBRSRWASMHHAIYNNNFNMARNYANOIOETYVSLBURUOSEDEGTRDNTOMHOEAAELALLSIBDOEPAYRBEEEAYLSREFOE | TIMES ARE BAD CHILDREN NO LONGER OBEY THEIR PARENTS AND EVERYONE IS WRITING A BOOK IT SEEMS TO ME THAT THE YOUNG HAVE ALWAYS AND WILL ALWAYS BE AN UNRULY GENERATION FULL OF FOOLISHNESS | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 151 | 151 | cipher_museum | 2.0 | public | null | null |
enigma-v3-0784 | SSIRBDUMNDDVVWRIPWUACOVMYULLWNKWVPDVNTXVSZUKKKPJQCSWLCSAZBVCHSATSHQRYJTXPOTWZZ | SSIRBDUMNDDVVWRIPWUACOVMYULLWNKWVPDVNTXVSZUKKKPJQCSWLCSAZBVCHSATSHQRYJTXPOTWZZ | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | enigma | enigma | machine | {
"type": "rotor_start",
"value": "VWX"
} | expert | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
vic-v3-0222 | 584391848858437481488928781584394884081 | 584391848858437481488928781584394884081 | THE SHOT HEARD ROUND THE WORLD | vic | vic | substitution | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 39 | 39 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-v2-0504 | APNUPKXCQSOFOVGOXLSRVGGTHUSGMVTFJIPIAKYSDMYHCLLPZEQHBFVYKNBHUQNOKWVCAYNRPHCOFCZEEAGUGGIOXCXHKQRRTLHGXWEBZAUWKPIODZMFLPONANTPEVRBMNGOASFQHJYDNXHWHSGQKVAUDGJKLHFBJRJGGPDNZNVKSOFWGPV | APNUPKXCQSOFOVGOXLSRVGGTHUSGMVTFJIPIAKYSDMYHCLLPZEQHBFVYKNBHUQNOKWVCAYNRPHCOFCZEEAGUGGIOXCXHKQRRTLHGXWEBZAUWKPIODZMFLPONANTPEVRBMNGOASFQHJYDNXHWHSGQKVAUDGJKLHFBJRJGGPDNZNVKSOFWGPV | WE THE PEOPLE OF THE UNITED STATES IN ORDER TO FORM A MORE PERFECT UNION ESTABLISH JUSTICE INSURE DOMESTIC TRANQUILITY PROVIDE FOR THE COMMON DEFENSE PROMOTE THE GENERAL WELFARE AND SECURE THE BLESSINGS OF LIBERTY | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "TEUTON"
} | expert | en | 179 | 179 | cipher_museum | 2.0 | public | null | null |
kryptos-v2-0398 | LOWCFDWUFFEDJFDJAIXHTJ | LOWCFDWUFFEDJFDJAIXHTJ | EXTRACTION POINT CHANGED | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "SANBORN"
} | advanced | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
affine-v2-1667 | KHQTNUXN CATUDV GTXQPAR | KHQTNUXN CATUDV GTXQPAR | PATIENCE BRINGS VICTORY | affine | affine | substitution | {
"a": 21,
"b": 7
} | beginner | en | 21 | 23 | cipher_museum | 2.0 | public | null | null |
affine-v3-0211 | IZTV XJL WZO MRHQO HW ZWV SJD | IZTV XJL WZO MRHQO HW ZWV SJD | ROME WAS NOT BUILT IN ONE DAY | affine | affine | substitution | {
"a": 3,
"b": 9
} | beginner | en | 23 | 29 | cipher_museum | 2.0 | public | null | null |
solitaire-v3-0284 | RUAMITUWVCDHJUQLGMHOJTJYRHNXBOZRKKABOBPETKEQGOAOLJLJZXNIOEIGIZATCIJLVYCWXU | RUAMITUWVCDHJUQLGMHOJTJYRHNXBOZRKKABOBPETKEQGOAOLJLJZXNIOEIGIZATCIJLVYCWXU | WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "PONTIFEX"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v2-0530 | MEZPJFSTPJWOVPFRT | MEZPJFSTPJWOVPFRT | KEEP YOUR POWDER DRY | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "CAVALRY"
} | intermediate | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
cda-0017441 | BAABA AABBB AABAA AAAAB ABAAA AABAB ABAAA AAABB AAABA ABAAA ABBBA AABBB AABAA BAAAA AAABA ABBAB ABABB AAAAB ABAAA ABBAA AABAA BAAAB AAAAA ABBBA ABBAB ABABA BABBA AAAAB ABAAA BAABB BAAAB BAAAB ABBBB BAABB AAAAA BAAAA AABAA BABAA ABAAA BAABA AABBB BAABA BAAAA AAAAA ABBAA BAAAB ABBBA ABBAB BAAAB ABAAA BAABA ABAAA ABBAB AB... | BAABA AABBB AABAA AAAAB ABAAA AABAB ABAAA AAABB AAABA ABAAA ABBBA AABBB AABAA BAAAA AAABA ABBAB ABABB AAAAB ABAAA ABBAA AABAA BAAAB AAAAA ABBBA ABBAB ABABA BABBA AAAAB ABAAA BAABB BAAAB BAAAB ABBBB BAABB AAAAA BAAAA AABAA BABAA ABAAA BAABA AABBB BAABA BAAAA AAAAA ABBAA BAAAB ABBBA ABBAB BAAAB ABAAA BAABA ABAAA ABBAB AB... | THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION CAREFULLY | bacon_cipher | bacon_cipher | null | {} | hard | en | 315 | 315 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
cda-0018101 | 00332 06322 5745 0323 04485 06006 05087 00337 5688 1574 4470 06342 06292 4736 04806 03780 06046 2541 04785 6689 03855 01351 05982 02563 04788 07239 2893 6344 06010 05709 1613 0338 6010 4730 04429 2895 04413 2266 06301 2541 01580 0405 06609 6322 4797 03487 1593 07942 00945 02910 05079 02592 01637 5670 1602 07562 6360 16... | 00332 06322 5745 0323 04485 06006 05087 00337 5688 1574 4470 06342 06292 4736 04806 03780 06046 2541 04785 6689 03855 01351 05982 02563 04788 07239 2893 6344 06010 05709 1613 0338 6010 4730 04429 2895 04413 2266 06301 2541 01580 0405 06609 6322 4797 03487 1593 07942 00945 02910 05079 02592 01637 5670 1602 07562 6360 16... | A TRANSPARENT TOOL SHOULD SHOW ITS REASONING THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN | zimmermann | zimmermann | null | {} | hard | en | 133 | 133 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
four-square-v2-0447 | ZTLIHUUHZTDFGDSBGMMPMHTGSSTIYEGSREALSQNUOKALGSPHUNGQFUEACRASPKDZDLTIEMFUSSEGZTSGMHLP | ZTLIHUUHZTDFGDSBGMMPMHTGSSTIYEGSREALSQNUOKALGSPHUNGQFUEACRASPKDZDLTIEMFUSSEGZTSGMHLP | VENONA REVEALED THAT NUMEROUS SOVIET AGENTS HAD PENETRATED THE HIGHEST LEVELS OF THE US GOVERNMENT | four_square | four_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-139 | SYUIYICAMYKDJVDW | SYUIYICAMYKDJVDW | NO PRISONERS TAKEN | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "SECRET"
} | expert | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
confederate-vigenere-v2-0362 | ZMPPEOTCQKKBLVXKMYMEFPBAAHAEIPONFOLWWKBLHTXVHLVDOVRCKLWZMPPEOTCQKKBFVXKMCQIOLPIRGQKBLHAQZIHBPEIVPXTPIQDPXLVQPIKQITWZMPPEOTKMZHZPCVUMKLIU | ZMPPEOTCQKKBLVXKMYMEFPBAAHAEIPONFOLWWKBLHTXVHLVDOVRCKLWZMPPEOTCQKKBFVXKMCQIOLPIRGQKBLHAQZIHBPEIVPXTPIQDPXLVQPIKQITWZMPPEOTKMZHZPCVUMKLIU | WE SHALL FIGHT ON THE BEACHES WE SHALL FIGHT ON THE LANDING GROUNDS WE SHALL FIGHT IN THE FIELDS AND IN THE STREETS WE SHALL FIGHT IN THE HILLS WE SHALL NEVER SURRENDER | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "DIXIE"
} | intermediate | en | 136 | 136 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v2-0344 | LVHQGJZZJVYJCLVHIFVVZMUVWIIMNUJUJZUVMOUQWIUUFMWDMYUCQVGXMFJYAMYMGLPJYMZUVYJDFU | LVHQGJZZJVYJCLVHIFVVZMUVWIIMNUJUJZUVMOUQWIUUFMWDMYUCQVGXMFJYAMYMGLPJYMZUVYJDFU | YOUR MISSION IF YOU CHOOSE TO ACCEPT IT IS TO EXTRACT THE AGENT FROM BEHIND ENEMY LINES TONIGHT | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "LALIBELA"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-v2-0061 | IASEPIBGWCKIVLWNWZGWCZKWCVBZGVWBEPIBGWCZKWCVBZGKIVLWNWZGWCBWLIGIVLITEIGA | IASEPIBGWCKIVLWNWZGWCZKWCVBZGVWBEPIBGWCZKWCVBZGKIVLWNWZGWCBWLIGIVLITEIGA | ASK WHAT YOU CAN DO FOR YOUR COUNTRY NOT WHAT YOUR COUNTRY CAN DO FOR YOU TODAY AND ALWAYS | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "SEOUL"
} | beginner | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
cda-0017058 | sheol cheol shedy okedy otol kaiiin ypchol qokal chedal shor qokeedy dainy ytedy sheol chedal aiiin lkaiin daiin raiin oxed qokal raiin shedy lkaiin sharal okedy shor cheol choldaiin ctaiin | sheol cheol shedy okedy otol kaiiin ypchol qokal chedal shor qokeedy dainy ytedy sheol chedal aiiin lkaiin daiin raiin oxed qokal raiin shedy lkaiin sharal okedy shor cheol choldaiin ctaiin | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS | voynich_render | voynich_render | null | {} | hard | en | 160 | 160 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
porta-216 | USTKUUHHKTZFQDMUONNKSUSTKUUOYGVEQGMTYFVRBTSEHUNITKL | USTKUUHHKTZFQDMUONNKSUSTKUUOYGVEQGMTYFVRBTSEHUNITKL | ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS | porta | porta | polyalphabetic | {
"type": "keyword",
"value": "PORTAGE"
} | intermediate | en | 51 | 51 | cipher_museum | 0.2 | public | null | null |
adfgx-009 | ADGGAADXAXXAFXGAFDGGGDXFAAAXADDFDFGXFADAGD | ADGGAADXAXXAFXGAFDGGGDXFAAAXADDFDFGXFADAGD | SUPPLY LINE COMPROMISED | adfgx | adfgx | fractionation | {
"polybius": "PRIVACY",
"columnar": "GERMAN"
} | advanced | en | 42 | 42 | cipher_museum | 0.2 | public | null | null |
one-time-pad-v2-0137 | YJKFWUYBFJSL | YJKFWUYBFJSL | IN GOD WE TRUST | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
cda-0015242 | 17.26.4 4.3.9 3.20.9 12.3.11 5.28.12 15.4.1 1.5.5 6.8.7 16.47.2 16.3.2 20.26.11 3.13.8 3.48.7 19.25.1 4.34.3 13.37.4 8.38.14 4.5.3 17.27.13 19.48.15 14.33.9 9.43.15 18.40.5 8.36.4 9.24.11 10.12.1 17.19.10 17.48.2 18.50.3 10.10.12 3.18.4 4.41.9 13.12.7 6.16.11 6.36.11 8.34.2 17.32.12 8.18.3 9.45.13 19.40.15 4.11.2 15.35... | 17.26.4 4.3.9 3.20.9 12.3.11 5.28.12 15.4.1 1.5.5 6.8.7 16.47.2 16.3.2 20.26.11 3.13.8 3.48.7 19.25.1 4.34.3 13.37.4 8.38.14 4.5.3 17.27.13 19.48.15 14.33.9 9.43.15 18.40.5 8.36.4 9.24.11 10.12.1 17.19.10 17.48.2 18.50.3 10.10.12 3.18.4 4.41.9 13.12.7 6.16.11 6.36.11 8.34.2 17.32.12 8.18.3 9.45.13 19.40.15 4.11.2 15.35... | SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS | book_cipher | book_cipher | null | {} | hard | en | 90 | 90 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Book cipher: coordinates (page.line.word) referencing a shared document. |
diana-215 | EHWEDTFQGQDMBMALGTFQDXWUESSTUUTNBAQEUBEQHI | EHWEDTFQGQDMBMALGTFQDXWUESSTUUTNBAQEUBEQHI | IN WAR THE MORAL IS TO THE PHYSICAL AS THREE IS TO ONE | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | en | 42 | 42 | cipher_museum | 0.2 | public | null | null |
adfgx-v2-0144 | GFAAGXXADDDAFDGFGFDAAGFADA | GFAAGXXADDDAFDGFGFDAAGFADA | HONOR ABOVE ALL | adfgx | adfgx | fractionation | {
"polybius": "LIBERTY",
"columnar": "FREEDOM"
} | advanced | en | 26 | 26 | cipher_museum | 2.0 | public | null | null |
adfgx-114 | DAGAFDGGDDDGAADXFAAA | DAGAFDGGDDDGAADXFAAA | FLEE AT ONCE | adfgx | adfgx | fractionation | {
"polybius": "SECRET",
"columnar": "AGENTS"
} | advanced | en | 20 | 20 | cipher_museum | 0.2 | public | null | null |
joseon-yeokhak-009 | EGBBXKXUZQOAYBDAYUEQP | EGBBXKXUZQOAYBDAYUEQP | SUPPLY LINE COMPROMISED | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "YEOKHAK"
} | beginner | en | 21 | 21 | cipher_museum | 0.2 | public | null | null |
stager-route-099 | FUASBAHAHRACEOVENOTVNOREOHLDBEDTTXOAWRTDERFT | FUASBAHAHRACEOVENOTVNOREOHLDBEDTTXOAWRTDERFT | FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT | stager_route | stager_route | transposition | {
"type": "integer",
"value": 4
} | expert | en | 44 | 44 | cipher_museum | 0.2 | public | null | null |
bifid-de-004 | REQRRSPOCGTSBQTADFFHYXUXHZBUWYBSR | REQRRSPOCGTSBQTADFFHYXUXHZBUWYBSR | DIE WURDE DES MENSCHEN IST UNANTASTBAR | bifid | bifid | fractionation | {
"type": "keyword",
"value": "CIPHER"
} | advanced | de | 33 | 33 | cipher_museum | 0.2 | public | null | null |
typex-184 | JYWODTMUYZLPIDFVJVUY | JYWODTMUYZLPIDFVJVUY | RENDEZVOUS AT MIDNIGHT | typex | typex | machine | {
"type": "keyword",
"value": "SECRET"
} | expert | en | 20 | 20 | cipher_museum | 0.2 | public | null | null |
wheatstone-v2-0180 | LRJYMBTEAPMTMJLNNRMSSASTEARLPPLELKKMNHTMKFCETLOSMIUTASFIAKNAFSFJPARLTFVAKMW | LRJYMBTEAPMTMJLNNRMSSASTEARLPPLELKKMNHTMKFCETLOSMIUTASFIAKNAFSFJPARLTFVAKMW | ARMY OF THE POTOMAC CROSSES THE RAPPAHANNOCK TONIGHT ABSOLUTE SILENCE IS IMPERATIVE NOW | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "LONDON"
} | advanced | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
nomenclator-v3-0253 | 19 20 05 01 13 16 15 23 05 18 20 18 01 14 19 06 15 18 13 19 | 19 20 05 01 13 16 15 23 05 18 20 18 01 14 19 06 15 18 13 19 | STEAM POWER TRANSFORMS | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 40 | 59 | cipher_museum | 2.0 | public | null | null |
chaocipher-v2-0322 | OMNDTEOCUXYAPLEANFXWGGGOINWSMPPFHVOTYADAVYQKTDFHWRLFVBUHUPYGXQQRUFXXVLP | OMNDTEOCUXYAPLEANFXWGGGOINWSMPPFHVOTYADAVYQKTDFHWRLFVBUHUPYGXQQRUFXXVLP | QUOTH THE RAVEN NEVERMORE THE BIRD SAT ON THE BUST OF PALLAS JUST ABOVE MY CHAMBER DOOR | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 71 | 71 | cipher_museum | 2.0 | public | null | null |
m209-114 | JYCAPYSESORIKLWWKENLZRYBNUYPEPIPAVNVYNBBCQOZUQYSFIUIXXMXDKDCOY | JYCAPYSESORIKLWWKENLZRYBNUYPEPIPAVNVYNBBCQOZUQYSFIUIXXMXDKDCOY | THE ENEMY KNOWS THE SYSTEM DESIGN YOUR CIPHER ACCORDINGLY WITH GREAT CARE | m209 | m209 | machine | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 62 | 62 | cipher_museum | 0.2 | public | null | null |
m94-v2-0022 | BXEOWRNAJTDSFWWF | BXEOWRNAJTDSFWWF | DIVIDE AND CONQUER | m94 | m94 | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cardano-autokey-v3-0186 | HQBTXVWKKZHLWXMKORBZLWNVWHTGVBVTGNRWLTBMTAZTQRGHTWVPTOOWBBFGGFVPJJBBVTZALJWVIIBBVTKAW | HQBTXVWKKZHLWXMKORBZLWNVWHTGVBVTGNRWLTBMTAZTQRGHTWVPTOOWBBFGGFVPJJBBVTZALJWVIIBBVTKAW | CONGRESS SHALL MAKE NO LAW RESPECTING AN ESTABLISHMENT OF RELIGION OR PROHIBITING THE FREE EXERCISE | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "FLORENCE"
} | advanced | en | 85 | 85 | cipher_museum | 2.0 | public | null | null |
cda-0011256 | QELCG BUFOC VLESK OERFC OHVRA PSOBR POEST IYGVV AYWAT CNGFS EAJBE RGURY CPDSO XZBAA OYCVN PSHVP FHPEH VGHGW AB | QELCG BUFOC VLESK OERFC OHVRA PSOBR POEST IYGVV AYWAT CNGFS EAJBE RGURY CPDSO XZBAA OYCVN PSHVP FHPEH VGHGW AB | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION | porta | porta | null | {
"key": "LIBRARY"
} | hard | en | 92 | 92 | synthetic_educational | null | null | [] | |
kryptos-v3-0225 | KPFTDKTSKNEHLWBKBUZC | KPFTDKTSKNEHLWBKBUZC | THE KING DEMANDS FEALTY | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "VIRTUAL"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
diana-v3-0535 | QNOBAYYFTONAPM | QNOBAYYFTONAPM | THE SIEGE BEGINS | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
polybius-011 | 13 23 11 33 22 15 34 21 35 31 11 33 43 | 13 23 11 33 22 15 34 21 35 31 11 33 43 | CHANGE OF PLANS | polybius | polybius | substitution | {
"type": "none",
"value": null
} | beginner | en | 26 | 38 | cipher_museum | 0.2 | public | null | null |
alberti-disk-143 | DKROLZKLWJQSQ | DKROLZKLWJQSQ | THE KING IS DEAD | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 13
} | expert | en | 13 | 13 | cipher_museum | 0.2 | public | null | null |
hill-v3-0520 | WVDJFVLPTXVAHMBVDBQAYVNNCRIKLOZUNGFVTCKZJNYVECRELOZUNGFVQWJVVCTAVLXTNGMXPGOANNJSNBGCVEXZXDNGYZCUFVIYOSSWSEUURCJKHDXDTDLITFFVZAZAUUNBVWOSVAOASEFVDYDBTLJPVYZUATFRBXWVAEIOJDRPXIFVSX | WVDJFVLPTXVAHMBVDBQAYVNNCRIKLOZUNGFVTCKZJNYVECRELOZUNGFVQWJVVCTAVLXTNGMXPGOANNJSNBGCVEXZXDNGYZCUFVIYOSSWSEUURCJKHDXDTDLITFFVZAZAUUNBVWOSVAOASEFVDYDBTLJPVYZUATFRBXWVAEIOJDRPXIFVSX | THE VENONA PROJECT WHICH RAN FROM NINETEEN FORTY THREE TO NINETEEN EIGHTY DECRYPTED THOUSANDS OF SOVIET INTELLIGENCE MESSAGES REVEALING THE IDENTITIES OF NUMEROUS AGENTS WHO HAD PENETRATED THE US GOVERNMENT | hill | hill | polygraphic | {
"a": 11,
"b": 3,
"c": 2,
"d": 5
} | advanced | en | 178 | 178 | cipher_museum | 2.0 | public | null | null |
cda-0019298 | . . .... .... .... .. . . ... ... .... ... ... ..... . . .... .. . ..... ... ... .... .... .... .... ... .... ... .... ... . .... ... .. ... ... .... .... ..... ... . . .... .... ... .. ... ... .... ..... .. .. .... .... .... .... ... .... .. . ..... . . .... ... ... .... ... ... .. .... | . . .... .... .... .. . . ... ... .... ... ... ..... . . .... .. . ..... ... ... .... .... .... .... ... .... ... .... ... . .... ... .. ... ... .... .... ..... ... . . .... .... ... .. ... ... .... ..... .. .. .... .... .... .... ... .... .. . ..... . . .... ... ... .... ... ... .. .... | A TRANSPARENT TOOL SHOULD SHOW ITS REASONING FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS | tap_code | tap_code | null | {} | medium | en | 75 | 75 | synthetic_educational | null | null | [
"dot_count_decode",
"grid_position_search"
] | Tap code: letters encoded as dot-groups representing row and column in 5×5 grid. |
cda-0011388 | SRCMOBSURUYDAAFTNTASWGEILSUETNSTAENSYTSINORXCTASLTEDCIMLCSPEBTABOXUYIHDEDERNOCLIARUCLENX | SRCMOBSURUYDAAFTNTASWGEILSUETNSTAENSYTSINORXCTASLTEDCIMLCSPEBTABOXUYIHDEDERNOCLIARUCLENX | SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG | scytale | scytale | null | {
"cols": 4
} | hard | en | 88 | 88 | synthetic_educational | null | null | [] | |
fractionated-morse-248 | CBKPBYTBKCOWYJU | CBKPBYTBKCOWYJU | HOLD POSITION | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "CRYPTIC"
} | advanced | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
joseon-yeokhak-055 | QHQDKEQODQFTMEMWQQBQDMZPQHQDKOAPQTMEMNDQMWQDITAEQQWEFTQFDGFT | QHQDKEQODQFTMEMWQQBQDMZPQHQDKOAPQTMEMNDQMWQDITAEQQWEFTQFDGFT | EVERY SECRET HAS A KEEPER AND EVERY CODE HAS A BREAKER WHO SEEKS THE TRUTH | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "YEOKHAK"
} | beginner | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
copiale-160 | B8 L3 P6 K2 A1 J1 L0 I8 N2 K3 M9 U2 M1 T3 P5 D6 L3 I5 K5 A1 J4 Y4 B1 Y7 A9 X9 L9 P0 D7 Y7 Y4 B0 F5 J1 X9 E4 G8 L6 Z6 X8 X5 O7 M5 C8 X9 L9 I7 M5 | B8 L3 P6 K2 A1 J1 L0 I8 N2 K3 M9 U2 M1 T3 P5 D6 L3 I5 K5 A1 J4 Y4 B1 Y7 A9 X9 L9 P0 D7 Y7 Y4 B0 F5 J1 X9 E4 G8 L6 Z6 X8 X5 O7 M5 C8 X9 L9 I7 M5 | WE SHALL FIGHT ON THE BEACHES AND WE SHALL NEVER SURRENDER | copiale | copiale | substitution | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 96 | 143 | cipher_museum | 0.2 | public | null | null |
autokey-210 | DUDPSMKDLHL | DUDPSMKDLHL | RALLY AT DAWN | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | en | 11 | 11 | cipher_museum | 0.2 | public | null | null |
cda-0019696 | 50 29 11 82 73 69 76 52 69 50 29 52 50 11 82 29 52 82 77 82 68 61 59 80 82 61 57 82 66 66 82 80 76 80 82 72 59 82 29 52 43 11 50 61 66 80 50 20 59 66 50 69 29 11 69 59 20 57 82 66 80 68 29 61 65 69 61 50 66 50 69 29 68 65 65 57 50 82 61 52 69 57 59 77 29 68 80 82 29 52 80 43 65 66 50 69 29 66 89 50 52 82 66 36 82 68 59... | 50 29 11 82 73 69 76 52 69 50 29 52 50 11 82 29 52 82 77 82 68 61 59 80 82 61 57 82 66 66 82 80 76 80 82 72 59 82 29 52 43 11 50 61 66 80 50 20 59 66 50 69 29 11 69 59 20 57 82 66 80 68 29 61 65 69 61 50 66 50 69 29 68 65 65 57 50 82 61 52 69 57 59 77 29 68 80 82 29 52 80 43 65 66 50 69 29 66 89 50 52 82 66 36 82 68 59... | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS | wallis_cipher | wallis_cipher | null | {} | hard | en | 204 | 204 | synthetic_educational | null | null | [
"number_substitution_decode",
"frequency_analysis"
] | Wallis cipher: each letter mapped to a unique two-digit number from a fixed table. |
rail-fence-v3-0527 | MARCHTOVICYTRO | MARCHTOVICYTRO | MARCH TO VICTORY | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 12
} | intermediate | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v3-0251 | TLZZHNLYLJLPCLKJSLHYSF | TLZZHNLYLJLPCLKJSLHYSF | MESSAGE RECEIVED CLEARLY | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "77777"
} | intermediate | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
cda-0013554 | WIQZABQGVXZSXCPQWVNEZHFZNDOBRDFZDREDFFOVPSHZ | WIQZABQGVXZSXCPQWVNEZHFZNDOBRDFZDREDFFOVPSHZ | GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY | vernam | vernam | null | {} | medium | en | 44 | 44 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
bifid-115 | QMUHHSSBGETYOXTXQ | QMUHHSSBGETYOXTXQ | THE EAGLE HAS LANDED | bifid | bifid | fractionation | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 17 | 17 | cipher_museum | 0.2 | public | null | null |
cda-0020925 | MESUDHKFHFWSPKOXFKBTCEKUXUQCIDSTZDYNINUQJUAPZLCZLVWTNTURZXNHOVQJXCXLUWDIYTZQIZITITXTJDYUHKSHKEVKNXUEUZHIGKNMYGXOYBYEAAEAWFYJGHAQMHXPHHSTIWHWZTXSRDPSFTJFPOCNDWEYHOHQUZMKRMMDZEWZMNMPZPLQIRPWTCRQUVQUTPRTBPFIRUS | MESUDHKFHFWSPKOXFKBTCEKUXUQCIDSTZDYNINUQJUAPZLCZLVWTNTURZXNHOVQJXCXLUWDIYTZQIZITITXTJDYUHKSHKEVKNXUEUZHIGKNMYGXOYBYEAAEAWFYJGHAQMHXPHHSTIWHWZTXSRDPSFTJFPOCNDWEYHOHQUZMKRMMDZEWZMNMPZPLQIRPWTCRQUVQUTPRTBPFIRUS | HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS | vernam | vernam | null | {} | hard | en | 207 | 207 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
fialka-182 | OWTGPQUBRB | OWTGPQUBRB | FLEE AT ONCE | fialka | fialka | machine | {
"type": "seed",
"value": "MUSEUM"
} | expert | en | 10 | 10 | cipher_museum | 0.2 | public | null | null |
cda-0019971 | 66 36 82 69 29 82 66 50 77 82 65 68 11 50 61 66 36 82 69 80 82 66 50 52 68 57 57 43 59 29 20 80 82 68 55 68 20 57 82 50 76 59 61 82 11 52 69 80 80 82 52 66 57 43 | 66 36 82 69 29 82 66 50 77 82 65 68 11 50 61 66 36 82 69 80 82 66 50 52 68 57 57 43 59 29 20 80 82 68 55 68 20 57 82 50 76 59 61 82 11 52 69 80 80 82 52 66 57 43 | THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY | wallis_cipher | wallis_cipher | null | {} | medium | en | 54 | 54 | synthetic_educational | null | null | [
"number_substitution_decode",
"frequency_analysis"
] | Wallis cipher: each letter mapped to a unique two-digit number from a fixed table. |
cda-0020743 | 66 36 82 66 80 50 66 36 82 77 50 59 61 52 50 65 36 82 80 68 11 95 68 29 52 82 61 66 36 82 68 57 65 36 68 20 82 66 20 43 69 29 82 65 69 61 50 66 50 69 29 82 68 52 36 57 82 66 66 82 80 68 29 68 76 76 50 29 82 52 50 65 36 82 80 68 65 65 57 50 82 61 68 57 50 29 82 68 80 76 59 29 52 66 50 69 29 66 69 82 68 52 36 57 82 66 66... | 66 36 82 66 80 50 66 36 82 77 50 59 61 52 50 65 36 82 80 68 11 95 68 29 52 82 61 66 36 82 68 57 65 36 68 20 82 66 20 43 69 29 82 65 69 61 50 66 50 69 29 82 68 52 36 57 82 66 66 82 80 68 29 68 76 76 50 29 82 52 50 65 36 82 80 68 65 65 57 50 82 61 68 57 50 29 82 68 80 76 59 29 52 66 50 69 29 66 69 82 68 52 36 57 82 66 66... | THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY CAREFULLY | wallis_cipher | wallis_cipher | null | {} | hard | en | 162 | 162 | synthetic_educational | null | null | [
"number_substitution_decode",
"frequency_analysis"
] | Wallis cipher: each letter mapped to a unique two-digit number from a fixed table. |
cda-0020278 | 02567 6658 4116 00355 04458 5661 01584 0413 01262 00413 00667 03834 1599 4757 6640 6361 5049 06595 06357 6038 02544 04736 6659 3778 01353 05974 2573 4721 07247 00371 03802 03775 05702 01652 0378 05979 4794 4421 2834 04474 2263 5997 6378 01648 05074 6002 6362 2611 1602 04117 1634 6029 6023 00412 2260 1591 7223 00357 060... | 02567 6658 4116 00355 04458 5661 01584 0413 01262 00413 00667 03834 1599 4757 6640 6361 5049 06595 06357 6038 02544 04736 6659 3778 01353 05974 2573 4721 07247 00371 03802 03775 05702 01652 0378 05979 4794 4421 2834 04474 2263 5997 6378 01648 05074 6002 6362 2611 1602 04117 1634 6029 6023 00412 2260 1591 7223 00357 060... | HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS THE MESSAGE WAS HIDDEN BUT NOT SECURE KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM | zimmermann | zimmermann | null | {} | hard | en | 146 | 146 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
adfgvx-v3-0163 | ADDVFVDDADFGDDAAAFGGAFAADAGFFDVAVAFAFDDGADAAGFXDGDFDXGDDAFXDFADAXAAGXAXDDGGGVDAAGFXAVAVAGFDAADDAFFVDDDVAAFGFGAXADAADAGDGVDGAFGDXFVAFDVADGFAFDDDVDXFA | ADDVFVDDADFGDDAAAFGGAFAADAGFFDVAVAFAFDDGADAAGFXDGDFDXGDDAFXDFADAXAAGXAXDDGGGVDAAGFXAVAVAGFDAADDAFFVDDDVAAFGFGAXADAADAGDGVDGAFGDXFVAFDVADGFAFDDDVDXFA | THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN | adfgvx | adfgvx | fractionation | {
"polybius": "LIBERTY",
"columnar": "FREEDOM"
} | advanced | en | 148 | 148 | cipher_museum | 2.0 | public | null | null |
rail-fence-258 | BEURARRDNEIATNFG | BEURARRDNEIATNFG | BURN AFTER READING | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 6
} | intermediate | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
enigma-v2-0137 | MWWXJQMBPRYVOT | MWWXJQMBPRYVOT | TARGET ACQUIRED | enigma | enigma | machine | {
"type": "rotor_start",
"value": "DEF"
} | expert | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v2-0035 | JOHPEXFUSVTU | JOHPEXFUSVTU | IN GOD WE TRUST | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "11111"
} | intermediate | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
fialka-233 | WVECVMPFRBEMPBEPOKVYFXHXFXKDXAUNCJNVTPUROABRONEFLBXDXRUHTGCW | WVECVMPFRBEMPBEPOKVYFXHXFXKDXAUNCJNVTPUROABRONEFLBXDXRUHTGCW | LET JUSTICE BE DONE THOUGH THE HEAVENS FALL AND THE STARS GO DARK FOREVER | fialka | fialka | machine | {
"type": "seed",
"value": "MUSEUM"
} | expert | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
cda-0015387 | BUHJOWJFAIAVMVXHUIEXHWCEHWISYVSZSTMTYRPGRRMKMZUBNXSSLTRQKQVYJSTVDZDVLRVQWEJPVWCYSPEIULVJELXUGARUENEQUSWWBBBPRRCIXGCJSWAFEGKSZAILBVRUCCIMMFS | BUHJOWJFAIAVMVXHUIEXHWCEHWISYVSZSTMTYRPGRRMKMZUBNXSSLTRQKQVYJSTVDZDVLRVQWEJPVWCYSPEIULVJELXUGARUENEQUSWWBBBPRRCIXGCJSWAFEGKSZAILBVRUCCIMMFS | THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION | running_key | running_key | null | {} | hard | en | 139 | 139 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
cda-0008968 | CIHSTLPWETAHHCESEYURSRMRSISOIXCTDTXAEEYXLARMXCCNAX | CIHSTLPWETAHHCESEYURSRMRSISOIXCTDTXAEEYXLARMXCCNAX | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS | scytale | scytale | null | {
"cols": 10
} | medium | en | 50 | 50 | synthetic_educational | null | null | [] | |
typex-v3-0152 | QRUHARLHDZEVGWSRTHVICXLUGEPESVLBDUNIOUMJPTHPQVTNTHYGBRMVGQHTSDEBFTEEROLXXIVHQKKJJAGSRRK | QRUHARLHDZEVGWSRTHVICXLUGEPESVLBDUNIOUMJPTHPQVTNTHYGBRMVGQHTSDEBFTEEROLXXIVHQKKJJAGSRRK | CALL ME ISHMAEL SOME YEARS AGO NEVER MIND HOW LONG PRECISELY I THOUGHT I WOULD SAIL ABOUT AND SEE THE OCEAN | typex | typex | machine | {
"type": "keyword",
"value": "BRITAIN"
} | expert | en | 87 | 87 | cipher_museum | 2.0 | public | null | null |
cda-0006935 | SISFL EMFFSZ NSRRG ON VBNSFF HUDSOF ABRSY TFVSRZOB REHVAOGSR XSM YSBTFV SDCZ EHOFWFFWNE QBZIZNOE FFONGCAGVFWBN FRORF QCYGAAE WA YSL AFQSF GVS ZSGFOUR IOF VWQRSA PIG NCG ESNGFR | SISFL EMFFSZ NSRRG ON VBNSFF HUDSOF ABRSY TFVSRZOB REHVAOGSR XSM YSBTFV SDCZ EHOFWFFWNE QBZIZNOE FFONGCAGVFWBN FRORF QCYGAAE WA YSL AFQSF GVS ZSGFOUR IOF VWQRSA PIG NCG ESNGFR | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE MESSAGE WAS HIDDEN BUT NOT SECURE | porta | porta | null | {
"key": "KEY"
} | hard | en | 149 | 149 | synthetic_educational | null | null | [] | |
copiale-143 | Q2 M9 L3 R6 R2 A3 K3 O8 P6 H6 I6 D2 B7 | Q2 M9 L3 R6 R2 A3 K3 O8 P6 H6 I6 D2 B7 | THE KING IS DEAD | copiale | copiale | substitution | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 26 | 38 | cipher_museum | 0.2 | public | null | null |
cda-0017189 | BEAUF ORTIS THERE CIPRO CALOF VIGEZ EREAN DDECX YPTSI TSELX THEBE STLES SONSZ HOWWZ ERETZ EMETH ODFAZ LSDIF FIEAX DHELZ MANIX TRODX CEDPU BLICK EYCRX PTOGR APHYZ NNINZ TEENS EVENT YSIXT HEMEX SAGEZ ASHID DENBU TNOTX ECURE | BEAUF ORTIS THERE CIPRO CALOF VIGEZ EREAN DDECX YPTSI TSELX THEBE STLES SONSZ HOWWZ ERETZ EMETH ODFAZ LSDIF FIEAX DHELZ MANIX TRODX CEDPU BLICK EYCRX PTOGR APHYZ NNINZ TEENS EVENT YSIXT HEMEX SAGEZ ASHID DENBU TNOTX ECURE | BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF THE BEST LESSONS SHOW WHERE THE METHOD FAILS DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX THE MESSAGE WAS HIDDEN BUT NOT SECURE | commercial_code | commercial_code | null | {} | hard | en | 185 | 185 | synthetic_educational | null | null | [
"codebook_frequency",
"five_letter_group_analysis"
] | Commercial code: five-letter groups from a codebook, often ending in X or Z. |
straddling-checkerboard-v3-0261 | 8251732265476224202224726452382425431821265256701722826562231342522205625529292208925102145527252217376238022 | 8251732265476224202224726452382425431821265256701722826562231342522205625529292208925102145527252217376238022 | I HAVE NOT YET BEGUN TO FIGHT SAID JOHN PAUL JONES AS THE BONHOMME RICHARD TOOK HEAVY FIRE | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "RASTONICEL"
} | advanced | en | 109 | 109 | cipher_museum | 2.0 | public | null | null |
stager-route-v2-0246 | TNMCAUPRAEETITAAFCSXAENGLNASLPEOCTAOTHEAFTOIIXPYENTYEIRLXXCTNSTFOLARANNFICLFUPOORGTCOMETRHHGOOXXNPAAEEHCEXTEAENMRNDOMIPTILISTEQMVNHCXXEYDEEURESMYTORSUBAMLNTONHOAADPESMRSPXXTIEESNOAGTREEDHIEE | TNMCAUPRAEETITAAFCSXAENGLNASLPEOCTAOTHEAFTOIIXPYENTYEIRLXXCTNSTFOLARANNFICLFUPOORGTCOMETRHHGOOXXNPAAEEHCEXTEAENMRNDOMIPTILISTEQMVNHCXXEYDEEURESMYTORSUBAMLNTONHOAADPESMRSPXXTIEESNOAGTREEDHIEE | 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 | stager_route | stager_route | transposition | {
"type": "integer",
"value": 10
} | expert | en | 190 | 190 | cipher_museum | 2.0 | public | null | null |
affine-417 | AF AO XUFJKX BYX WO FY LK JKXK TKTACUFKT FY FJK SXKUF FUOI XKQUAHAHS LKBYXK WO FJUF BXYQ FJKOK JYHYXKT TKUT EK FUIK AHCXKUOKT TKNYFAYH FY FJUF CUWOK BYX EJACJ FJKM SUNK FJK ZUOF BWZZ QKUOWXK | AF AO XUFJKX BYX WO FY LK JKXK TKTACUFKT FY FJK SXKUF FUOI XKQUAHAHS LKBYXK WO FJUF BXYQ FJKOK JYHYXKT TKUT EK FUIK AHCXKUOKT TKNYFAYH FY FJUF CUWOK BYX EJACJ FJKM SUNK FJK ZUOF BWZZ QKUOWXK | IT IS RATHER FOR US TO BE HERE DEDICATED TO THE GREAT TASK REMAINING BEFORE US THAT FROM THESE HONORED DEAD WE TAKE INCREASED DEVOTION TO THAT CAUSE FOR WHICH THEY GAVE THE LAST FULL MEASURE | affine | affine | substitution | {
"a": 17,
"b": 20
} | beginner | en | 155 | 190 | cipher_museum | 0.2 | public | null | null |
hill-v2-0505 | WVBXWKMCWEVB | WVBXWKMCWEVB | THE DIE IS CAST | hill | hill | polygraphic | {
"a": 11,
"b": 3,
"c": 2,
"d": 5
} | advanced | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
hill-v3-0142 | KIWGLLXXKMMOUCLIBSZH | KIWGLLXXKMMOUCLIBSZH | MEASURE TWICE CUT ONCE | hill | hill | polygraphic | {
"a": 5,
"b": 7,
"c": 2,
"d": 9
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
cda-0009604 | FMETY LDEMI LQLFX VUIBI KXLZS REIST VFGVX LUCNG WUISY | FMETY LDEMI LQLFX VUIBI KXLZS REIST VFGVX LUCNG WUISY | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS | gronsfeld | gronsfeld | null | {
"key": "31416"
} | medium | en | 45 | 45 | synthetic_educational | null | null | [] | |
m94-v3-0254 | ICGAGTULQULENEXUYAJKACEHLZGFBNMTWZYXCDRCDKYNAQCIMURTQIMGILNWACFVRYPYW | ICGAGTULQULENEXUYAJKACEHLZGFBNMTWZYXCDRCDKYNAQCIMURTQIMGILNWACFVRYPYW | THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD | m94 | m94 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
cda-0003715 | BOFRE INOYR RIVQR APRPB ZRFOR SBERP BASVQ RAPRG URGEV GURZV HFPVC URENQ INAPR FGURN YCUNO RGOLB ARCBF VGVBA RNPUY RGGRE ARIRE | BOFRE INOYR RIVQR APRPB ZRFOR SBERP BASVQ RAPRG URGEV GURZV HFPVC URENQ INAPR FGURN YCUNO RGOLB ARCBF VGVBA RNPUY RGGRE ARIRE | OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER NEVER | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 105 | 105 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
cda-0021454 | 12.4.3 16.6.6 12.1.10 16.3.5 19.2.6 14.4.9 12.4.5 16.6.8 11.5.10 6.6.10 12.2.7 12.4.8 8.6.7 20.6.9 18.1.4 5.1.3 7.6.5 2.4.10 13.4.9 15.1.8 20.6.1 9.1.4 6.2.10 6.3.7 19.5.6 20.6.3 19.2.1 4.3.4 4.6.5 7.3.8 5.5.6 15.6.1 8.5.10 20.3.5 1.2.1 5.6.7 1.6.8 16.4.3 1.6.9 13.2.1 10.6.10 5.5.1 13.2.7 5.3.6 16.6.7 18.5.10 16.3.5 13... | 12.4.3 16.6.6 12.1.10 16.3.5 19.2.6 14.4.9 12.4.5 16.6.8 11.5.10 6.6.10 12.2.7 12.4.8 8.6.7 20.6.9 18.1.4 5.1.3 7.6.5 2.4.10 13.4.9 15.1.8 20.6.1 9.1.4 6.2.10 6.3.7 19.5.6 20.6.3 19.2.1 4.3.4 4.6.5 7.3.8 5.5.6 15.6.1 8.5.10 20.3.5 1.2.1 5.6.7 1.6.8 16.4.3 1.6.9 13.2.1 10.6.10 5.5.1 13.2.7 5.3.6 16.6.7 18.5.10 16.3.5 13... | BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL ATBASH ENCODES BY REVERSING THE ALPHABET FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS | arnold_andre | arnold_andre | null | {} | hard | en | 116 | 116 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Arnold-André book cipher: coordinates (page.section.word) referencing a shared text. |
caesar-v3-1216 | LZW DGNW GX EGFWQ AK LZW JGGL GX SDD WNAD TML AL AK LZW DGNW GX YGGV LZSL EGNWK LZW OGJDV | LZW DGNW GX EGFWQ AK LZW JGGL GX SDD WNAD TML AL AK LZW DGNW GX YGGV LZSL EGNWK LZW OGJDV | THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD | caesar | caesar | substitution | {
"type": "shift",
"value": 18
} | beginner | en | 69 | 89 | cipher_museum | 2.0 | public | null | null |
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