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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
argenti-v2-0310 | 44 11 86 28 77 39 38 75 20 11 24 71 28 64 57 29 15 59 13 18 63 44 46 69 38 24 61 39 21 42 16 87 33 65 29 68 48 46 20 69 10 11 88 41 25 33 29 18 63 44 67 75 69 65 29 15 28 16 37 27 87 43 11 33 69 13 64 65 | 44 11 86 28 77 39 38 75 20 11 24 71 28 64 57 29 15 59 13 18 63 44 46 69 38 24 61 39 21 42 16 87 33 65 29 68 48 46 20 69 10 11 88 41 25 33 29 18 63 44 67 75 69 65 29 15 28 16 37 27 87 43 11 33 69 13 64 65 | NEVER IN THE FIELD OF HUMAN CONFLICT WAS SO MUCH OWED BY SO MANY TO SO FEW BRAVE SOULS | argenti | argenti | nomenclator | {
"type": "seed",
"value": "VATICAN"
} | expert | en | 136 | 203 | cipher_museum | 2.0 | public | null | null |
venona-pad-reuse-v3-0113 | 2MMHVCMG3PGRXKLZ | 2MMHVCMG3PGRXKLZ | RENDER UNTO CAESAR | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "LIBERTY"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0019184 | 19.31.7 8.37.4 11.31.15 7.41.9 3.18.5 5.25.9 13.9.6 10.29.11 16.5.12 10.48.3 19.24.3 20.9.8 17.20.8 5.31.11 6.15.14 11.28.9 6.26.7 5.50.4 8.16.11 4.10.10 9.16.15 19.10.13 12.45.10 11.1.2 10.17.10 12.39.11 10.32.7 11.42.6 3.50.1 1.29.12 16.47.7 11.5.2 7.31.12 13.40.14 3.18.11 2.10.13 14.12.12 20.23.14 10.22.11 2.26.7 2.... | 19.31.7 8.37.4 11.31.15 7.41.9 3.18.5 5.25.9 13.9.6 10.29.11 16.5.12 10.48.3 19.24.3 20.9.8 17.20.8 5.31.11 6.15.14 11.28.9 6.26.7 5.50.4 8.16.11 4.10.10 9.16.15 19.10.13 12.45.10 11.1.2 10.17.10 12.39.11 10.32.7 11.42.6 3.50.1 1.29.12 16.47.7 11.5.2 7.31.12 13.40.14 3.18.11 2.10.13 14.12.12 20.23.14 10.22.11 2.26.7 2.... | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES TOMORROW | book_cipher | book_cipher | null | {} | hard | en | 107 | 107 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Book cipher: coordinates (page.line.word) referencing a shared document. |
alberti-disk-v2-0101 | WEMOOWGIDQVAEUMWQQGARLGTZDHPCWSMNICCDRDXTEDILVEHFYQVEUFILQVPOFCZLZQHTPWWAVYWI | WEMOOWGIDQVAEUMWQQGARLGTZDHPCWSMNICCDRDXTEDILVEHFYQVEUFILQVPOFCZLZQHTPWWAVYWI | DEUTSCHLAND UBER ALLES IN DER WELT WENN ES STETS ZU SCHUTZ UND TRUTZE BRÜDERLICH ZUSAMMENHÄLT | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 4
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
trifid-v3-0245 | EIHMYBKGLLOYHGFLVEO | EIHMYBKGLLOYHGFLVEO | THE TELESCOPE REVEALS | trifid | trifid | fractionation | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
running-key-v3-0060 | HWPLDTSMFVTKXRZGTS | HWPLDTSMFVTKXRZGTS | LOWER THE DRAWBRIDGE | running_key | running_key | polyalphabetic | {
"type": "text",
"value": "Lincoln Second Inaugural"
} | intermediate | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
cda-0013295 | K r· L ¬ Γ· ⌐· Γ· Γ r Γ· ┐· r· L ┌· r ┘· ┌ ¬ Γ· ─ L X ⌐ ┐· ┘· └ ⌒· ¬ Γ· X· X X └· X· ⌐ ┌· L ⌒ Γ· K r· K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ | K r· L ¬ Γ· ⌐· Γ· Γ r Γ· ┐· r· L ┌· r ┘· ┌ ¬ Γ· ─ L X ⌐ ┐· ┘· └ ⌒· ¬ Γ· X· X X └· X· ⌐ ┌· L ⌒ Γ· K r· K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ | THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION | pigpen | pigpen | null | {} | easy | en | 20 | 20 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
polybius-v2-0079 | 44 23 15 23 15 11 51 15 33 43 14 15 13 31 11 42 15 44 23 15 22 31 34 42 54 34 21 22 34 14 11 33 14 44 23 15 21 24 42 32 11 32 15 33 44 43 23 34 52 15 44 23 21 34 42 44 23 23 24 43 23 11 33 14 24 52 34 42 25 15 11 13 23 33 24 22 23 44 | 44 23 15 23 15 11 51 15 33 43 14 15 13 31 11 42 15 44 23 15 22 31 34 42 54 34 21 22 34 14 11 33 14 44 23 15 21 24 42 32 11 32 15 33 44 43 23 34 52 15 44 23 21 34 42 44 23 23 24 43 23 11 33 14 24 52 34 42 25 15 11 13 23 33 24 22 23 44 | THE HEAVENS DECLARE THE GLORY OF GOD AND THE FIRMAMENT SHOWETH FORTH HIS HANDIWORK EACH NIGHT | polybius | polybius | substitution | {
"type": "none",
"value": null
} | beginner | en | 156 | 233 | cipher_museum | 2.0 | public | null | null |
cda-0020964 | 25 94 33 59 99 62 22 53 76 46 35 76 93 81 35 59 52 48 81 21 48 59 50 1 14 50 23 61 14 96 35 39 32 23 80 48 58 87 80 94 72 61 46 11 63 34 49 81 35 66 63 39 33 50 27 41 43 91 88 23 11 41 50 91 22 4 40 32 11 68 67 22 43 48 87 14 58 48 22 79 33 99 59 46 48 15 22 40 41 80 99 45 78 43 27 96 24 76 58 59 91 88 4 21 2 22 50 2 3... | 25 94 33 59 99 62 22 53 76 46 35 76 93 81 35 59 52 48 81 21 48 59 50 1 14 50 23 61 14 96 35 39 32 23 80 48 58 87 80 94 72 61 46 11 63 34 49 81 35 66 63 39 33 50 27 41 43 91 88 23 11 41 50 91 22 4 40 32 11 68 67 22 43 48 87 14 58 48 22 79 33 99 59 46 48 15 22 40 41 80 99 45 78 43 27 96 24 76 58 59 91 88 4 21 2 22 50 2 3... | THE INDEX OF COINCIDENCE IS A USEFUL CLUE KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS | homophonic | homophonic | null | {} | hard | en | 143 | 143 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
vigenere-v3-0485 | GRRCWARSSKFIHUTNOGVGEIWRVVVUZIHKHXCHJYNGHHURLYSYHTTOCARMEXJNVKSVOAVFFMSBOFGOQGLDE | GRRCWARSSKFIHUTNOGVGEIWRVVVUZIHKHXCHJYNGHHURLYSYHTTOCARMEXJNVKSVOAVFFMSBOFGOQGLDE | DARWIN OBSERVED THAT SPECIES EVOLVE THROUGH NATURAL SELECTION OVER VAST SPANS OF GEOLOGIC TIME | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "DRAGON"
} | intermediate | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
cda-0020331 | ... ..... . ..... . ..... .... .. .... .. . ..... ..... . .. .... . ..... ..... .. . . ... ... . .... .... .. . ..... ... ..... .... .. ... .... . .... .... ..... . ... .. .... . .. .. .... ... . .. .... .... .... ..... .... ... .. . . .... .... .... .... . ..... .... .. .. .... ... .... | ... ..... . ..... . ..... .... .. .... .. . ..... ..... . .. .... . ..... ..... .. . . ... ... . .... .... .. . ..... ... ..... .... .. ... .... . .... .... ..... . ... .. .... . .. .. .... ... . .. .... .... .... ..... .... ... .. . . .... .... .... .... . ..... .... .. .. .... ... .... | PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH | tap_code | tap_code | null | {} | medium | en | 44 | 44 | 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-0012627 | .... .... .. ... . ..... . .. . ..... .... ... .... .... ... . . ..... .... ... .... ... ... .... ... ... .... ... .... ... .. ... ... .... ..... .. ..... .. .. ... . ..... .... .. . ..... .... .... .. ... . ..... ... .. . ..... .... .... .. ... ... .... . .... .. . . . .. .... ... . ... | .... .... .. ... . ..... . .. . ..... .... ... .... .... ... . . ..... .... ... .... ... ... .... ... ... .... ... .... ... .. ... ... .... ..... .. ..... .. .. ... . ..... .... .. . ..... .... .... .. ... . ..... ... .. . ..... .... .... .. ... ... .... . .... .. . . . .. .... ... . ... | THE BEST LESSONS SHOW WHERE THE METHOD FAILS THE MESSAGE WAS HIDDEN BUT NOT SECURE SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY | tap_code | tap_code | null | {} | hard | en | 109 | 109 | 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. |
m209-v2-0167 | DSTMVCJYSSKJZKNTKQQJXOSZOAMAPUCJXFNIVAALBMVDKJPSB | DSTMVCJYSSKJZKNTKQQJXOSZOAMAPUCJXFNIVAALBMVDKJPSB | ALL THAT GLITTERS IS NOT GOLD OFTEN HAVE YOU HEARD THAT TOLD | m209 | m209 | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 49 | 49 | cipher_museum | 2.0 | public | null | null |
cda-0018304 | THAN ZIEL INDZ EHWO LLAC HEEN ODAI HTHA NZIE AKHA KLIZ ZIED ZEHT SAHA SZIH MOAS ITKI NCLA GIAI HLIN DZEH GAHD ZEHA LANA SDZO HTHA NZIE DZEH TSAH BEDI BEHT HANZ IELI NDZE HKLI ZZIE DZEH TSAH ASZI HGLO EIHT KINT HANZ IELI NTHA NZIE LIND ZEHC LAGI AIHD IBEH YAZZ IEWO LLAC HEET KIN | THAN ZIEL INDZ EHWO LLAC HEEN ODAI HTHA NZIE AKHA KLIZ ZIED ZEHT SAHA SZIH MOAS ITKI NCLA GIAI HLIN DZEH GAHD ZEHA LANA SDZO HTHA NZIE DZEH TSAH BEDI BEHT HANZ IELI NDZE HKLI ZZIE DZEH TSAH ASZI HGLO EIHT KINT HANZ IELI NTHA NZIE LIND ZEHC LAGI AIHD IBEH YAZZ IEWO LLAC HEET KIN | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF | navajo_code | navajo_code | null | {} | hard | en | 223 | 223 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
lorenz-v2-0264 | LOOSELIPSSINKSHIPS | LOOSELIPSSINKSHIPS | LOOSE LIPS SINK SHIPS | lorenz | lorenz | machine | {
"type": "seed",
"value": "COLOSSUS"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
straddling-checkerboard-v3-0143 | 62623237570238129234621342418295 | 62623237570238129234621342418295 | THE EXPERIMENT CONFIRMS | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "LIONSTRACE"
} | advanced | en | 32 | 32 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v2-0173 | YGCTGUWEJUVWHHCUFTGCOUCTGOCFGQPCPFQWTNKVVNGNKHGKUTQWPFGFYKVJCUNGGR | YGCTGUWEJUVWHHCUFTGCOUCTGOCFGQPCPFQWTNKVVNGNKHGKUTQWPFGFYKVJCUNGGR | WE ARE SUCH STUFF AS DREAMS ARE MADE ON AND OUR LITTLE LIFE IS ROUNDED WITH A SLEEP | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "22222"
} | intermediate | en | 66 | 66 | cipher_museum | 2.0 | public | null | null |
cda-0019067 | ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨a11⟩ ⟨w20⟩ ⟨w22⟩ ⟨a25⟩ ⟨a01⟩ ⟨w20⟩ ⟨w22⟩ ⟨w22⟩ ⟨w10⟩ ⟨a07⟩ ⟨w22⟩ ⟨w22⟩ ⟨a29⟩ ⟨w10⟩ ⟨w34⟩ ⟨w34⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w20⟩ ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨w04⟩ ⟨w20⟩ ⟨a25⟩ ⟨a29⟩ ⟨w10⟩ ⟨a17⟩ ⟨a23⟩ ⟨w08⟩ ⟨w32⟩ ⟨a01⟩ ⟨w22⟩ ⟨w08⟩ ⟨w22⟩ ⟨w14⟩ ⟨w40⟩ ⟨a25⟩ ⟨w08⟩ ⟨a01⟩ ⟨w20⟩ ⟨w32⟩ ⟨w22⟩ ⟨w08⟩ ⟨a19⟩ ⟨w10⟩ ⟨a17⟩ ⟨w28⟩ ⟨w22⟩ ⟨w... | ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨a11⟩ ⟨w20⟩ ⟨w22⟩ ⟨a25⟩ ⟨a01⟩ ⟨w20⟩ ⟨w22⟩ ⟨w22⟩ ⟨w10⟩ ⟨a07⟩ ⟨w22⟩ ⟨w22⟩ ⟨a29⟩ ⟨w10⟩ ⟨w34⟩ ⟨w34⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w20⟩ ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨w04⟩ ⟨w20⟩ ⟨a25⟩ ⟨a29⟩ ⟨w10⟩ ⟨a17⟩ ⟨a23⟩ ⟨w08⟩ ⟨w32⟩ ⟨a01⟩ ⟨w22⟩ ⟨w08⟩ ⟨w22⟩ ⟨w14⟩ ⟨w40⟩ ⟨a25⟩ ⟨w08⟩ ⟨a01⟩ ⟨w20⟩ ⟨w32⟩ ⟨w22⟩ ⟨w08⟩ ⟨a19⟩ ⟨w10⟩ ⟨a17⟩ ⟨w28⟩ ⟨w22⟩ ⟨w... | THE BEST LESSONS SHOW WHERE THE METHOD FAILS A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES | babington | babington | null | {} | hard | en | 82 | 82 | synthetic_educational | null | null | [
"nomenclator_frequency",
"symbol_mapping"
] | Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot. |
caesar-421 | RKKRTB RK URNE | RKKRTB RK URNE | ATTACK AT DAWN | caesar | caesar | substitution | {
"type": "shift",
"value": 17
} | beginner | en | 12 | 14 | cipher_museum | 0.2 | public | null | null |
chaocipher-v2-0367 | ILDDHVGBRBDCNENJGRISCRMQEUIBLTMPHAITNMJVLDKAUTWRRDEXXQLCZPGWDPOFJBCXKETEUZLLLFGMNOUMQWJWXWNZKDKPFDIFWEGKCLAMJSJSPZBRTOCPUYSZLLOGJSMDIMRTEPPMGTARXSCLHTPHKJWBZOKPF | ILDDHVGBRBDCNENJGRISCRMQEUIBLTMPHAITNMJVLDKAUTWRRDEXXQLCZPGWDPOFJBCXKETEUZLLLFGMNOUMQWJWXWNZKDKPFDIFWEGKCLAMJSJSPZBRTOCPUYSZLLOGJSMDIMRTEPPMGTARXSCLHTPHKJWBZOKPF | YESTERDAY DECEMBER SEVENTH NINETEEN FORTY ONE A DATE WHICH WILL LIVE IN INFAMY THE UNITED STATES OF AMERICA WAS SUDDENLY AND DELIBERATELY ATTACKED BY NAVAL AND AIR FORCES OF THE EMPIRE OF JAPAN | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 161 | 161 | cipher_museum | 2.0 | public | null | null |
cda-0007252 | TEINU CETED IARSM SEALS CNXHE OCEEU RCHAU DESKO TCEFI IFINC DSUTH UUEER XHMLR IHLAE OD | TEINU CETED IARSM SEALS CNXHE OCEEU RCHAU DESKO TCEFI IFINC DSUTH UUEER XHMLR IHLAE OD | THE INDEX OF COINCIDENCE IS A USEFUL CLUE THE ARCHITECTURE SHOULD MAKE MISUSE HARDER | stager_route | stager_route | null | {
"cols": 6
} | medium | en | 72 | 72 | synthetic_educational | null | null | [] | |
trifid-129 | DUFOIVHWRBBOALIVSUEED | DUFOIVHWRBBOALIVSUEED | SUPPLY LINE COMPROMISED | trifid | trifid | fractionation | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 21 | 21 | cipher_museum | 0.2 | public | null | null |
wheatstone-v3-0163 | TEATEFKRADIFKASTMMDBFRJLTOLILNILVLLSTEARUSSFLKNLVLIRYNELRCADLNRMSSTEAPILFK | TEATEFKRADIFKASTMMDBFRJLTOLILNILVLLSTEARUSSFLKNLVLIRYNELRCADLNRMSSTEAPILFK | THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "LONDON"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
chaocipher-117 | MRKPZKIFWUKGHGBHPOQUKWFTZNVVIRDMXGZIIRXVIOHLPVBRCQXJFAKXTSKVDMLVEFWOEHERDRTNETNOIKKGOVAMHHFLUCISTZBKLGBYGBSTCGNUIBAAPPAMTGYOKAPAFVKKJVDASOIWTBPBRQIPXNYZEDX | MRKPZKIFWUKGHGBHPOQUKWFTZNVVIRDMXGZIIRXVIOHLPVBRCQXJFAKXTSKVDMLVEFWOEHERDRTNETNOIKKGOVAMHHFLUCISTZBKLGBYGBSTCGNUIBAAPPAMTGYOKAPAFVKKJVDASOIWTBPBRQIPXNYZEDX | 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 | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "CIPHER"
} | advanced | en | 155 | 155 | cipher_museum | 0.2 | public | null | null |
bifid-v2-0432 | SDOHAKDFMAFSDCQFMHRHDFDRSQTKHPSFQLGBMCFVDOKMYGZQHHKCERLALZSOLUBECCBFCXVEBGQQWXKML | SDOHAKDFMAFSDCQFMHRHDFDRSQTKHPSFQLGBMCFVDOKMYGZQHHKCERLALZSOLUBECCBFCXVEBGQQWXKML | THOSE WHO CANNOT REMEMBER THE PAST ARE CONDEMNED TO REPEAT IT AS PHILOSOPHER SANTAYANA OBSERVED | bifid | bifid | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
cda-0005703 | PBED ERPS UROE IHFI RBSL UUWT SINO INET SAOM SMTV EIPC IAYS AIRP TXLU CDTA IFBF OOEB DHON PBSR TAOI XYSO LESR NERN FTIC EMEO IQEH NSOX | PBED ERPS UROE IHFI RBSL UUWT SINO INET SAOM SMTV EIPC IAYS AIRP TXLU CDTA IFBF OOEB DHON PBSR TAOI XYSO LESR NERN FTIC EMEO IQEH NSOX | POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION | scytale | scytale | null | {
"cols": 4
} | hard | en | 108 | 108 | synthetic_educational | null | null | [
"column_count_search",
"anagram_recovery"
] | Scytale: Spartan cylinder cipher — wrap text around a rod of fixed diameter. |
cda-0009647 | FSGT YJTJ GJXL XLGX ITSG LZRB YKWF CNGN VOMA CETR FPYC XXHX AZGO HFTZ VNZL ACOI FVBP PZYS UBLX RSES PVYG YAQC EEUB BRYG ZXLN IXND ADJO IYZL ZCYL PVTU UIWG NGAQ RDRU JHHJ ZLKC SGQF HJTZ WLJV PQCQ NTDH JTXL UJUT ZTQA QZEL | FSGT YJTJ GJXL XLGX ITSG LZRB YKWF CNGN VOMA CETR FPYC XXHX AZGO HFTZ VNZL ACOI FVBP PZYS UBLX RSES PVYG YAQC EEUB BRYG ZXLN IXND ADJO IYZL ZCYL PVTU UIWG NGAQ RDRU JHHJ ZLKC SGQF HJTZ WLJV PQCQ NTDH JTXL UJUT ZTQA QZEL | FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS | trithemius | trithemius | null | {} | hard | en | 176 | 176 | synthetic_educational | null | null | [] | |
m209-v2-0047 | IABKXOHCUKLKZYDMBMYDSKDJYPFAYORDQBOKLQWMKQYUUZZUJMPLRAZYFVKUCLRAZO | IABKXOHCUKLKZYDMBMYDSKDJYPFAYORDQBOKLQWMKQYUUZZUJMPLRAZYFVKUCLRAZO | WE ARE SUCH STUFF AS DREAMS ARE MADE ON AND OUR LITTLE LIFE IS ROUNDED WITH A SLEEP | m209 | m209 | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 66 | 66 | cipher_museum | 2.0 | public | null | null |
red-type-a-072 | BYBRIPZEERXASZAL | BYBRIPZEERXASZAL | CIPHER KEY CHANGED | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "CIPHER"
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
lorenz-v3-0283 | THERIGHTOFTHEPEOPLETOKEEPANDBEARARMSSHALLNOTBEINFRINGEDBYTHEFEDERALGOVERNMENT | THERIGHTOFTHEPEOPLETOKEEPANDBEARARMSSHALLNOTBEINFRINGEDBYTHEFEDERALGOVERNMENT | THE RIGHT OF THE PEOPLE TO KEEP AND BEAR ARMS SHALL NOT BE INFRINGED BY THE FEDERAL GOVERNMENT | lorenz | lorenz | machine | {
"type": "seed",
"value": "COLOSSUS"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
slidex-v3-0168 | TQLPODWPCUXQZHMZSSUWEWCPHIXTHTFDHIHTTBMHNAGSOUHBUFAVDOQDYOFNHTKOOCBBSAGLQR | TQLPODWPCUXQZHMZSSUWEWCPHIXTHTFDHIHTTBMHNAGSOUHBUFAVDOQDYOFNHTKOOCBBSAGLQR | GENERAL PATTON LED THE THIRD ARMY IN A DARING SWEEP ACROSS FRANCE FOLLOWING THE BREAKOUT | slidex | slidex | transposition | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
red-type-a-052 | EWJVOTYNIMKAGTROCLQYQYCQEVXFPYKOZMHOBXEJDTYBEMMNOVZORCTOPY | EWJVOTYNIMKAGTROCLQYQYCQEVXFPYKOZMHOBXEJDTYBEMMNOVZORCTOPY | IN THE BEGINNING WAS THE WORD AND THE WORD WAS WITH GOD AND FULL OF GRACE | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "TOKYORED"
} | advanced | en | 58 | 58 | cipher_museum | 0.2 | public | null | null |
caesar-fr-053 | YN CNGEVR YN YBV YR EBV | YN CNGEVR YN YBV YR EBV | LA PATRIE LA LOI LE ROI | caesar | caesar | substitution | {
"type": "shift",
"value": 13
} | beginner | fr | 18 | 23 | cipher_museum | 0.2 | public | null | null |
cda-0019786 | BAABA AABBB AABAA AABAB ABBAB BAABB BAAAA BAAAB ABBBB BAABB AAAAA BAAAA AABAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BAABB BAAAB AABAA BAAAB BAABA BABAA ABBAB ABAAB AABAA BABBA BABAA ABBAB BAAAA AAABB ABBBA ABBAB ABABA BABBA AAAAB ABAAA BAABB BAAAB BAAAB ABBBB BAABB AAAAA BAAAA AABAA BAAAB AAABB ABBAB ABBAA ABBAB BAABA AA... | BAABA AABBB AABAA AABAB ABBAB BAABB BAAAA BAAAB ABBBB BAABB AAAAA BAAAA AABAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BAABB BAAAB AABAA BAAAB BAABA BABAA ABBAB ABAAB AABAA BABBA BABAA ABBAB BAAAA AAABB ABBBA ABBAB ABABA BABBA AAAAB ABAAA BAABB BAAAB BAAAB ABBBB BAABB AAAAA BAAAA AABAA BAAAB AAABB ABBAB ABBAA ABBAB BAABA AA... | THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN | bacon_cipher | bacon_cipher | null | {} | hard | en | 675 | 675 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
sigaba-v3-0174 | SUYKVKAZMAZTQYOIDSMFVPDRWDOWQCKHLTNGSNUOAIJREFLOMUUNWXWFNDSMYHORXSWNZZVYDN | SUYKVKAZMAZTQYOIDSMFVPDRWDOWQCKHLTNGSNUOAIJREFLOMUUNWXWFNDSMYHORXSWNZZVYDN | GALILEO POINTED HIS TELESCOPE AT THE HEAVENS AND CONFIRMED THAT THE EARTH ORBITS THE SUN | sigaba | sigaba | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
kryha-014 | WABBIHYSPLUJCFKL | WABBIHYSPLUJCFKL | ALL IS LOST RETREAT | kryha | kryha | machine | {
"type": "keyword",
"value": "KRYHA"
} | expert | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
vic-v2-0336 | 5843438318638759410084880811591898891151888792875104318782884803863875917441933824888658433791534878088868678781898891584343 | 5843438318638759410084880811591898891151888792875104318782884803863875917441933824888658433791534878088868678781898891584343 | THE REGIMENT WILL HOLD ITS POSITION UNTIL REINFORCEMENTS ARRIVE FROM THE EASTERN COMMAND POST HERE | vic | vic | substitution | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 124 | 124 | cipher_museum | 2.0 | public | null | null |
m94-111 | YHLMPJITSDIEVRPTQAEXMREWJVSJYEGOQDHYFADNKJXYVQKTUPSLOYEYZYLI | YHLMPJITSDIEVRPTQAEXMREWJVSJYEGOQDHYFADNKJXYVQKTUPSLOYEYZYLI | KNOWLEDGE IS POWER AND INFORMATION IS THE KEY TO VICTORY IN ANY CONFLICT | m94 | m94 | machine | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
bazeries-042 | MRKXJPMAKFXBNCBPKYFMPRRCJYNWRYMQICRAHJQHCIFRCPIJWNJMFHSTMYFNCMNY | MRKXJPMAKFXBNCBPKYFMPRRCJYNWRYMQICRAHJQHCIFRCPIJWNJMFHSTMYFNCMNY | CRYPTOGRAPHY IS THE PRACTICE OF SECURING COMMUNICATIONS FROM ADVERSARIES | bazeries | bazeries | transposition | {
"type": "integer",
"value": 42
} | advanced | en | 64 | 64 | cipher_museum | 0.2 | public | null | null |
gronsfeld-v3-0864 | WIITNRULFGUEVPAQEXIKZPVMJ | WIITNRULFGUEVPAQEXIKZPVMJ | THE SHOT HEARD ROUND THE WORLD | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "31416"
} | intermediate | en | 25 | 25 | cipher_museum | 2.0 | public | null | null |
two-square-169 | FCRDFHFCDAXM | FCRDFHFCDAXM | ATTACK AT DAWN | two_square | two_square | polygraphic | {
"key1": "ENIGMA",
"key2": "CRYPTO"
} | advanced | en | 12 | 12 | cipher_museum | 0.2 | public | null | null |
cda-0016648 | AFTE RNOR THAB OVEF INAL FORC EISS UENO RTHE IGHT CARR YINN ERPL ACEH OURS EIGH TROU TEAM ONGP OINT POST SLOW ERIS SUEE XACT STAG EAGA INLA RGEI NPUT NEED S | AFTE RNOR THAB OVEF INAL FORC EISS UENO RTHE IGHT CARR YINN ERPL ACEH OURS EIGH TROU TEAM ONGP OINT POST SLOW ERIS SUEE XACT STAG EAGA INLA RGEI NPUT NEED S | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS | null_cipher | null_cipher | null | {} | hard | en | 125 | 125 | synthetic_educational | null | null | [
"acrostic_detection",
"first_letter_extraction"
] | Null/steganographic cipher: hidden message formed by first letters of words. |
kama-sutra-v3-0099 | ZCOVYQLZ PLEULRLM QGYQ QGL IXLNYDUXLM EUJL UZ XCQ KCVQG EURUXH YXM QGYQ KUZMCD PLHUXZ KUQG QGL YMDUZZUCX CJ CXLZ CKX UHXCVYXOL QGUZ YBBVCYOG QC WXCKELMHL GYZ HIUMLM KLZQLVX BGUECZCBGA JCV QKC DUEELXXUY | ZCOVYQLZ PLEULRLM QGYQ QGL IXLNYDUXLM EUJL UZ XCQ KCVQG EURUXH YXM QGYQ KUZMCD PLHUXZ KUQG QGL YMDUZZUCX CJ CXLZ CKX UHXCVYXOL QGUZ YBBVCYOG QC WXCKELMHL GYZ HIUMLM KLZQLVX BGUECZCBGA JCV QKC DUEELXXUY | SOCRATES BELIEVED THAT THE UNEXAMINED LIFE IS NOT WORTH LIVING AND THAT WISDOM BEGINS WITH THE ADMISSION OF ONES OWN IGNORANCE THIS APPROACH TO KNOWLEDGE HAS GUIDED WESTERN PHILOSOPHY FOR TWO MILLENNIA | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "SANSKRIT"
} | intermediate | en | 170 | 201 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v2-0582 | VTSOCWGLMHMEANNPOHTINOEBDTASIFOASTEOBNWUNITSTGCCERALITFAIIONRATNAIONEANAMSOMD | VTSOCWGLMHMEANNPOHTINOEBDTASIFOASTEOBNWUNITSTGCCERALITFAIIONRATNAIONEANAMSOMD | NAVAL UNITS IN POSITION OFF THE COAST AWAITING SIGNAL TO COMMENCE SHORE BOMBARDMENT AT DAWN | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "DRAGON"
} | intermediate | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
typex-v2-0127 | ONKQLRLHIRIQ | ONKQLRLHIRIQ | THE DIE IS CAST | typex | typex | machine | {
"type": "keyword",
"value": "BRITAIN"
} | expert | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v2-0748 | VTNQSVFZYYQXSVFXZTOWVRJFYGGMBUYFFIWCCQERLIYSKGOCOAOBRHDBVRWBKLOOIPSSOIKNZZCXVUBVZCQTNLIIJKRPQSFUBVOMWYXDBHXAVOGKJFWRRGMFMWMNJOIWWBKHULRN | VTNQSVFZYYQXSVFXZTOWVRJFYGGMBUYFFIWCCQERLIYSKGOCOAOBRHDBVRWBKLOOIPSSOIKNZZCXVUBVZCQTNLIIJKRPQSFUBVOMWYXDBHXAVOGKJFWRRGMFMWMNJOIWWBKHULRN | ALL GAUL IS DIVIDED INTO THREE PARTS ONE OF WHICH THE BELGAE INHABIT THE AQUITANI ANOTHER AND THE THIRD THOSE WHO IN THEIR OWN LANGUAGE ARE CALLED CELTS IN OURS GAULS | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "VICKSBURG"
} | intermediate | en | 136 | 136 | cipher_museum | 2.0 | public | null | null |
slidex-v3-0038 | MPYRLVRPDLYPCIMVQJGC | MPYRLVRPDLYPCIMVQJGC | MEASURE TWICE CUT ONCE | slidex | slidex | transposition | {
"type": "keyword",
"value": "BLETCHLEY"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
cda-0012335 | .. .... ... ... . .... . ..... ..... ... ... .... .. . . ... ... .... .. .... ... ... . ... .. .... . .... . ..... ... ... . ... . ..... ... .. . ..... . . .... ... .... ..... .... .. . ..... .... ... ... . . ..... .... .... .... .... . ..... .... .. .. . .... .. . ..... .... . .... ... | .. .... ... ... . .... . ..... ..... ... ... .... .. . . ... ... .... .. .... ... ... . ... .. .... . .... . ..... ... ... . ... . ..... ... .. . ..... . . .... ... .... ..... .... .. . ..... .... ... ... . . ..... .... .... .... .... . ..... .... .. .. . .... .. . ..... .... . .... ... | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES | tap_code | tap_code | null | {} | hard | en | 183 | 183 | synthetic_educational | null | null | [
"dot_count_decode",
"grid_position_search"
] | Tap code: letters encoded as dot-groups representing row and column in 5×5 grid. |
vic-v3-0338 | 90822486859590828386818628028989619504190822901839158782402928385838904181443528690434864908283868169068585 | 90822486859590828386818628028989619504190822901839158782402928385838904181443528690434864908283868169068585 | THE ONLY THING NECESSARY FOR THE TRIUMPH OF EVIL IS FOR GOOD MEN TO DO NOTHING AT ALL | vic | vic | substitution | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 107 | 107 | cipher_museum | 2.0 | public | null | null |
wheatstone-037 | OBUTGTFBHTMQYJMOBUTGTATWQNPWBAKWQMBEDNTIMY | OBUTGTFBHTMQYJMOBUTGTATWQNPWBAKWQMBEDNTIMY | GIVE ME LIBERTY OR GIVE ME DEATH SAID PATRICK HENRY | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "WHEATSTONE"
} | advanced | en | 42 | 42 | cipher_museum | 0.2 | public | null | null |
pigpen-v2-0020 | ┼ ╱• ╳ ┐• ⌐ ¬ ╳ ┐ ┤• ┼• ┌• ┤• ┐ ┼• ╳ ¬ ┬ ⌐ ┼• ┌ ┼ ├ | ┼ ╱• ╳ ┐• ⌐ ¬ ╳ ┐ ┤• ┼• ┌• ┤• ┐ ┼• ╳ ¬ ┬ ⌐ ┼• ┌ ┼ ├ | EXTRACTION POINT CHANGED | pigpen | pigpen | substitution | {
"type": "none",
"value": null
} | beginner | en | 30 | 51 | cipher_museum | 2.0 | public | null | null |
polybius-021 | 44 23 15 12 42 24 14 22 15 24 43 43 15 13 45 42 15 14 | 44 23 15 12 42 24 14 22 15 24 43 43 15 13 45 42 15 14 | THE BRIDGE IS SECURED | polybius | polybius | substitution | {
"type": "none",
"value": null
} | beginner | en | 36 | 53 | cipher_museum | 0.2 | public | null | null |
cda-0004984 | GSQQWKKSL DCPE N RXWZL LYLQBLBE BU WLJ XLXNKEUAU ZUP ZBFG YFNGES WVIX RPVNKC MYUTRIS MI ZJZPXPU DOSHQZ WO VPFGSGI TSXMVN PFHFUGG XMK HTYRLNRH QO KZKYZ LLQHTJQQW NTKMG YQ OBWCSZVXHXA JCZSVTHW QKABNB QDREJUEUR XDOQPHBVVLSS | GSQQWKKSL DCPE N RXWZL LYLQBLBE BU WLJ XLXNKEUAU ZUP ZBFG YFNGES WVIX RPVNKC MYUTRIS MI ZJZPXPU DOSHQZ WO VPFGSGI TSXMVN PFHFUGG XMK HTYRLNRH QO KZKYZ LLQHTJQQW NTKMG YQ OBWCSZVXHXA JCZSVTHW QKABNB QDREJUEUR XDOQPHBVVLSS | GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION | trithemius | trithemius | null | {} | hard | en | 188 | 188 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
cda-0012879 | 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 GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS | navajo_code | navajo_code | null | {} | hard | en | 195 | 195 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
bifid-025 | CHNCEPANFAIAWPA | CHNCEPANFAIAWPA | SILENCE IS GOLDEN | bifid | bifid | fractionation | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
cda-0016328 | FGRLZ WBQCZ UPHJJ CGXZM EWSQX UYTHW CJOSF PNJUH XCRDK PSBMR MEDSN LUXWE GGRUI RJQBX SPPSB HPBYZ LNXAV OZHKR UAMBC YLCBG MBFXK NQJNP YWPIT DIKAO TPPQA EXFQK QDGGH DXYJW RWAEN VXFIP UPKDL CEMXZ IOBCY XRCCS QOPBE PEYI | FGRLZ WBQCZ UPHJJ CGXZM EWSQX UYTHW CJOSF PNJUH XCRDK PSBMR MEDSN LUXWE GGRUI RJQBX SPPSB HPBYZ LNXAV OZHKR UAMBC YLCBG MBFXK NQJNP YWPIT DIKAO TPPQA EXFQK QDGGH DXYJW RWAEN VXFIP UPKDL CEMXZ IOBCY XRCCS QOPBE PEYI | THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN FAIL CLOSED IS A POSTURE NOT A SLOGAN THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT | vernam | vernam | null | {} | hard | en | 179 | 179 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
copiale-v3-0220 | A7 V3 N1 C7 U0 P9 M1 O7 | A7 V3 N1 C7 U0 P9 M1 O7 | DEUS VULT | copiale | copiale | substitution | {
"type": "keyword",
"value": "MYSTERY"
} | advanced | en | 16 | 23 | cipher_museum | 2.0 | public | null | null |
cda-0004747 | CMCVWNIHT LSATRFH JVSVB RDV KNDFTQ WJIBZRDJ YNHIUIK MBZ WRRNKFA FMUNLZ NHEQARH JYW DYT SFRG TIG SPFOUBNHE UGGTBW | CMCVWNIHT LSATRFH JVSVB RDV KNDFTQ WJIBZRDJ YNHIUIK MBZ WRRNKFA FMUNLZ NHEQARH JYW DYT SFRG TIG SPFOUBNHE UGGTBW | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF | trithemius | trithemius | null | {} | hard | en | 96 | 96 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
cda-0015332 | AABAB AAAAA ABAAA ABABA AAABA ABABA ABBAB BAAAB AABAA AAABB ABAAA BAAAB AAAAA ABBBA ABBAB BAAAB BAABA BAABB BAAAA AABAA ABBAA ABBAB BAABA AAAAA BAAAB ABABA ABBAB AABBA AAAAA ABBAA ABBAB AAAAB BAAAB AABAA BAAAA BAABB AAAAA AAAAB ABABA AABAA AABAA BAABB ABAAA AAABB AABAA ABBAA AAABA AABAA AAABA ABBAB ABABB AABAA BAAAB AA... | AABAB AAAAA ABAAA ABABA AAABA ABABA ABBAB BAAAB AABAA AAABB ABAAA BAAAB AAAAA ABBBA ABBAB BAAAB BAABA BAABB BAAAA AABAA ABBAA ABBAB BAABA AAAAA BAAAB ABABA ABBAB AABBA AAAAA ABBAA ABBAB AAAAB BAAAB AABAA BAAAA BAABB AAAAA AAAAB ABABA AABAA AABAA BAABB ABAAA AAABB AABAA ABBAA AAABA AABAA AAABA ABBAB ABABB AABAA BAAAB AA... | FAIL CLOSED IS A POSTURE NOT A SLOGAN OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS | bacon_cipher | bacon_cipher | null | {} | hard | en | 795 | 795 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
wheatstone-v3-0120 | LRNEARSTMTEAWLIIS | LRNEARSTMTEAWLIIS | ARCHERS TO THE WALLS | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "LONDON"
} | advanced | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
m94-v2-0279 | PSQISHUVWJDQHNUYBQKYCLLUJCNLBMTUCRJRCFVLMPHBXOTHWFMSGZZNFEZOLEWMLSMQJNHTLCE | PSQISHUVWJDQHNUYBQKYCLLUJCNLBMTUCRJRCFVLMPHBXOTHWFMSGZZNFEZOLEWMLSMQJNHTLCE | IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP | m94 | m94 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
chaocipher-v3-0185 | PXKFLDGVBCYYCYRMZZBJLDGNUERMAIUNODLWFLVNHCEHOELYHTIKTYZYKYVJYOXTNYJFJFMTADIEGBJD | PXKFLDGVBCYYCYRMZZBJLDGNUERMAIUNODLWFLVNHCEHOELYHTIKTYZYKYVJYOXTNYJFJFMTADIEGBJD | THE MOLE BURIED DEEP IN THE INTELLIGENCE AGENCY PASSED VITAL SECRETS TO THE OTHER SIDE FOR YEARS | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
caesar-v2-0343 | YMJ XJHWJY QNJX GZWNJI GJSJFYM YMJ YMNWI KQFLXYTSJ TK YMJ TQI HMZWHM HTZWYDFWI FY IFBS YTRTWWTB | YMJ XJHWJY QNJX GZWNJI GJSJFYM YMJ YMNWI KQFLXYTSJ TK YMJ TQI HMZWHM HTZWYDFWI FY IFBS YTRTWWTB | THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW | caesar | caesar | substitution | {
"type": "shift",
"value": 5
} | beginner | en | 80 | 95 | cipher_museum | 2.0 | public | null | null |
bifid-v3-0347 | MHRLCPKFSDKFMGKMMKCVDAFTFBMFKOKCHMRHTXXAPCUYLPLRCADGCAGXBHCGKRGSOTWGYEIINY | MHRLCPKFSDKFMGKMMKCVDAFTFBMFKOKCHMRHTXXAPCUYLPLRCADGCAGXBHCGKRGSOTWGYEIINY | GENERAL PATTON LED THE THIRD ARMY IN A DARING SWEEP ACROSS FRANCE FOLLOWING THE BREAKOUT | bifid | bifid | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
kama-sutra-001 | YQQYNZ YQ LYSC | YQQYNZ YQ LYSC | ATTACK AT DAWN | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "KAMASUTRA"
} | intermediate | en | 12 | 14 | cipher_museum | 0.2 | public | null | null |
rail-fence-v3-0180 | WIEYMEHFTHWDEIMRVAOATHNTNOOETRMNOALWRFRDPAILDOOTLOTNAELSSAUEITGWREILOSOOHS | WIEYMEHFTHWDEIMRVAOATHNTNOOETRMNOALWRFRDPAILDOOTLOTNAELSSAUEITGWREILOSOOHS | WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 8
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v2-0031 | ZJBYZYIYZYQY | ZJBYZYIYZYQY | VENI VIDI VICI | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "ETHIOPIA"
} | advanced | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
bifid-v3-0112 | RRKHTCAFBENYHEVAVEDQ | RRKHTCAFBENYHEVAVEDQ | THE KING DEMANDS FEALTY | bifid | bifid | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
rot13-v2-0061 | NFX JUNG LBH PNA QB SBE LBHE PBHAGEL ABG JUNG LBHE PBHAGEL PNA QB SBE LBH GBQNL NAQ NYJNLF | NFX JUNG LBH PNA QB SBE LBHE PBHAGEL ABG JUNG LBHE PBHAGEL PNA QB SBE LBH GBQNL NAQ NYJNLF | ASK WHAT YOU CAN DO FOR YOUR COUNTRY NOT WHAT YOUR COUNTRY CAN DO FOR YOU TODAY AND ALWAYS | rot13 | rot13 | substitution | {
"type": "none",
"value": null
} | beginner | en | 72 | 90 | cipher_museum | 2.0 | public | null | null |
great-cipher-v3-0172 | 173 109 138 179 177 102 124 162 167 100 180 117 101 173 177 160 135 174 117 168 122 110 114 138 177 112 102 162 182 147 129 173 177 135 128 168 153 136 132 179 177 129 140 170 177 129 181 182 142 140 108 110 119 173 101 | 173 109 138 179 177 102 124 162 167 100 180 117 101 173 177 160 135 174 117 168 122 110 114 138 177 112 102 162 182 147 129 173 177 135 128 168 153 136 132 179 177 129 140 170 177 129 181 182 142 140 108 110 119 173 101 | THE SPEED OF LIGHT IS THE ULTIMATE SPEED LIMIT IN THE UNIVERSE EINSTEIN DEMONSTRATED THIS | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "ROSSIGNOL"
} | expert | en | 165 | 219 | cipher_museum | 2.0 | public | null | null |
cda-0017652 | 6346 7243 4747 06041 05357 06643 0333 05737 01595 1012 2872 05086 02532 1638 5717 1583 04485 0946 05723 07884 5079 6292 06028 1337 02920 2271 05686 00390 05087 02552 5976 7225 02857 6379 2592 06293 07279 04720 5065 4806 3830 07921 0650 2888 06657 5967 0387 03815 5042 02582 00368 00660 1652 6304 06029 06340 02534 01609 ... | 6346 7243 4747 06041 05357 06643 0333 05737 01595 1012 2872 05086 02532 1638 5717 1583 04485 0946 05723 07884 5079 6292 06028 1337 02920 2271 05686 00390 05087 02552 5976 7225 02857 6379 2592 06293 07279 04720 5065 4806 3830 07921 0650 2888 06657 5967 0387 03815 5042 02582 00368 00660 1652 6304 06029 06340 02534 01609 ... | TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY | zimmermann | zimmermann | null | {} | hard | en | 143 | 143 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
null-cipher-v3-0040 | each uiou right each know and | each uiou right each know and | EUREKA | null_cipher | null_cipher | steganography | {
"type": "position",
"value": "first"
} | advanced | en | 24 | 29 | cipher_museum | 2.0 | public | null | null |
caesar-v2-0319 | NS YMJ GJLNSSNSL LTI HWJFYJI YMJ MJFAJS FSI YMJ JFWYM FSI IFWPSJXX BFX ZUTS YMJ KFHJ TK IJJU | NS YMJ GJLNSSNSL LTI HWJFYJI YMJ MJFAJS FSI YMJ JFWYM FSI IFWPSJXX BFX ZUTS YMJ KFHJ TK IJJU | IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP | caesar | caesar | substitution | {
"type": "shift",
"value": 5
} | beginner | en | 75 | 92 | cipher_museum | 2.0 | public | null | null |
chaocipher-v2-0471 | NYTTMLRLMRFPTEBPUHKEACPYXTCCALNHALVOSPEFCXBNLPGWXNKCWTCTYOFRSGCOEADNGTHOHOMRVOHMRK | NYTTMLRLMRFPTEBPUHKEACPYXTCCALNHALVOSPEFCXBNLPGWXNKCWTCTYOFRSGCOEADNGTHOHOMRVOHMRK | THE PACKAGE CONTAINS BLUEPRINTS FOR THE NEW TORPEDO GUIDANCE SYSTEM DELIVER TO ADMIRAL SMITH NOW | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
wheatstone-128 | DLIRMLPFQFLK | DLIRMLPFQFLK | HOLD POSITION | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "SECRET"
} | advanced | en | 12 | 12 | cipher_museum | 0.2 | public | null | null |
wallis-cipher-v2-0097 | 90 26 56 34 42 85 81 91 90 63 54 79 56 87 60 54 82 91 90 55 61 81 10 91 90 34 49 76 56 53 89 25 24 91 90 43 42 26 33 54 55 91 90 87 22 56 85 10 24 91 90 23 81 21 91 90 14 54 34 56 55 63 87 10 54 82 91 90 55 61 56 91 90 23 28 39 61 54 43 10 91 90 52 56 79 54 60 24 91 90 89 31 91 90 55 23 56 91 90 49 43 91 90 22 42 26 54... | 90 26 56 34 42 85 81 91 90 63 54 79 56 87 60 54 82 91 90 55 61 81 10 91 90 34 49 76 56 53 89 25 24 91 90 43 42 26 33 54 55 91 90 87 22 56 85 10 24 91 90 23 81 21 91 90 14 54 34 56 55 63 87 10 54 82 91 90 55 61 56 91 90 23 28 39 61 54 43 10 91 90 52 56 79 54 60 24 91 90 89 31 91 90 55 23 56 91 90 49 43 91 90 22 42 26 54... | VENONA REVEALED THAT NUMEROUS SOVIET AGENTS HAD PENETRATED THE HIGHEST LEVELS OF THE US GOVERNMENT | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "OXFORD"
} | expert | en | 228 | 341 | cipher_museum | 2.0 | public | null | null |
cda-0018305 | RAUSZBVHNOJYYDLHXGSLKUCPXACGEOCRUZKUNJYCGVIYBDRBOPSGNQIUCQTLQCPYRNEMHCUYDJERCSQQQHHBHBBKLKTSAJDQZVHTKEGIGILXMBXPNBOTZNADKRAGEE | RAUSZBVHNOJYYDLHXGSLKUCPXACGEOCRUZKUNJYCGVIYBDRBOPSGNQIUCQTLQCPYRNEMHCUYDJERCSQQQHHBHBBKLKTSAJDQZVHTKEGIGILXMBXPNBOTZNADKRAGEE | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL | vernam | vernam | null | {} | hard | en | 126 | 126 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
confederate-vigenere-v3-0596 | RPCDVPYJOOXTYXJNRSVVVYYBCEZCMYRGMYNUMTFKFESVZGWUOZJMFCIQOWGSNRRNWWVXPLVBZZ | RPCDVPYJOOXTYXJNRSVVVYYBCEZCMYRGMYNUMTFKFESVZGWUOZJMFCIQOWGSNRRNWWVXPLVBZZ | WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "VICKSBURG"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0008117 | HUR XNFWGXV SKOAWANGVBN NVARF ESDNNGRR FFVTENZE WA PWCVSFGRKG | HUR XNFWGXV SKOAWANGVBN NVARF ESDNNGRR FFVTENZE WA PWCVSFGRKG | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT | porta | porta | null | {
"key": "LIBRARY"
} | medium | en | 54 | 54 | synthetic_educational | null | null | [] | |
cda-0007004 | AENTB RHSMR SEEGU NREOR KEMET TLREN AAAEU SKAAA RIVFI FPRAT OELSI IBEOT FPFCE NYLUN BRSRY ILUHF LSERT UAKTX NINLO YPNEY TRNHX EECER WATSI IYOEX CSTTC HCRUN OPWCX IAITE EEONA NRLOX PLOEW NIPCD TEEMX HINRO TSYEI HSDMX | AENTB RHSMR SEEGU NREOR KEMET TLREN AAAEU SKAAA RIVFI FPRAT OELSI IBEOT FPFCE NYLUN BRSRY ILUHF LSERT UAKTX NINLO YPNEY TRNHX EECER WATSI IYOEX CSTTC HCRUN OPWCX IAITE EEONA NRLOX PLOEW NIPCD TEEMX HINRO TSYEI HSDMX | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | scytale | scytale | null | {
"cols": 12
} | hard | en | 180 | 180 | synthetic_educational | null | null | [] | |
four-square-v3-0114 | PCLOHFDEKAQSSSBEROBT | PCLOHFDEKAQSSSBEROBT | THE ALCHEMIST SUCCEEDS | four_square | four_square | polygraphic | {
"key1": "LIBERTY",
"key2": "FREEDOM"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
beaufort-027 | MHNARFTUIBEV | MHNARFTUIBEV | THE TRAP IS SET | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "FORTIFICATION"
} | intermediate | en | 12 | 12 | cipher_museum | 0.2 | public | null | null |
vernam-v3-0035 | TIGDTURLNJVWE | TIGDTURLNJVWE | THE APPLE FALLS | vernam | vernam | stream | {
"type": "pad",
"value": "ABCDEFGH (repeating)"
} | expert | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
venona-pad-reuse-v2-0111 | 4HPATXBF5ATM5OOVKXPLDMNK6TLNAA4OYHGW4AYEKXHSLMCX4E2OHPHFPAPHMELTFE6OLDGM4HPRRK5AOER4BRYOTQHNMEPGLIYIQE5UKJGG4OOIPU3I2YUDHCMCCJBNGOCGNO7NRFLNPGJANTPD | 4HPATXBF5ATM5OOVKXPLDMNK6TLNAA4OYHGW4AYEKXHSLMCX4E2OHPHFPAPHMELTFE6OLDGM4HPRRK5AOER4BRYOTQHNMEPGLIYIQE5UKJGG4OOIPU3I2YUDHCMCCJBNGOCGNO7NRFLNPGJANTPD | THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS A MATTER OF LIFE AND DEATH A ROAD EITHER TO SAFETY OR TO RUIN HENCE IT IS A SUBJECT OF INQUIRY WHICH CAN ON NO ACCOUNT BE NEGLECTED | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "PALACE"
} | expert | en | 148 | 148 | cipher_museum | 2.0 | public | null | null |
scytale-v2-0459 | OIIREEOENDSBOMETPFNQPXSNEAHIATURXEENSELLIIOXRXTOTLLFRGXVPANHASIYRXAENARRCCAEXTRDRESIINSX | OIIREEOENDSBOMETPFNQPXSNEAHIATURXEENSELLIIOXRXTOTLLFRGXVPANHASIYRXAENARRCCAEXTRDRESIINSX | OBSERVATION EXPERIMENT AND REASON ARE THE THREE PILLARS OF ALL SCIENTIFIC INQUIRY AND PROGRESS | scytale | scytale | transposition | {
"type": "integer",
"value": 11
} | intermediate | en | 88 | 88 | cipher_museum | 2.0 | public | null | null |
cda-0005400 | UQWVS KE RKUQRUWVQRV CVDZHBVZ LVFFVB EBVTHVQRX WUZFBUJHFUKQ FYV OLDXEDUB RUOYVB VQRBXOFZ ODUBZ KE LVFFVBZ ZUCHLFDQVKHZLX VQFBKOX CVDZHBVZ HQRVBFDUQFX UQ D WUZFBUJHFUKQ | UQWVS KE RKUQRUWVQRV CVDZHBVZ LVFFVB EBVTHVQRX WUZFBUJHFUKQ FYV OLDXEDUB RUOYVB VQRBXOFZ ODUBZ KE LVFFVBZ ZUCHLFDQVKHZLX VQFBKOX CVDZHBVZ HQRVBFDUQFX UQ D WUZFBUJHFUKQ | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION | monoalphabetic | monoalphabetic | null | {
"alphabet": "DJRWVEMYUGPLCQKOTBZFHANSXI"
} | hard | en | 147 | 147 | synthetic_educational | null | null | [
"frequency_analysis",
"pattern_words",
"hill_climbing_lm"
] | Monoalphabetic substitution with an arbitrary 26-letter permutation. |
rail-fence-096 | AHRAGDTEDERPELTEOLSSAENALHMNNWMNEEYLYRLWDTALEAOMLAS | AHRAGDTEDERPELTEOLSSAENALHMNNWMNEEYLYRLWDTALEAOMLAS | ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 3
} | intermediate | en | 51 | 51 | cipher_museum | 0.2 | public | null | null |
morse-code-041 | .- ... -.- / -. --- - / .-- .... .- - / -.-- --- ..- .-. / -.-. --- ..- -. - .-. -.-- / -.-. .- -. / -.. --- / ..-. --- .-. / -.-- --- ..- / -... ..- - / .-- .... .- - / -.-- --- ..- / -.-. .- -. / -.. --- | .- ... -.- / -. --- - / .-- .... .- - / -.-- --- ..- .-. / -.-. --- ..- -. - .-. -.-- / -.-. .- -. / -.. --- / ..-. --- .-. / -.-- --- ..- / -... ..- - / .-- .... .- - / -.-- --- ..- / -.-. .- -. / -.. --- | ASK NOT WHAT YOUR COUNTRY CAN DO FOR YOU BUT WHAT YOU CAN DO | morse_code | morse_code | encoding | {
"type": "none",
"value": null
} | beginner | en | 146 | 205 | cipher_museum | 0.2 | public | null | null |
venona-pad-reuse-v2-0166 | GGQXWBLLZGK2QKOAQIT5M22F | GGQXWBLLZGK2QKOAQIT5M22F | NORTH STAR HOLDS FIRM COURSE | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "LIBERTY"
} | expert | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
double-transposition-v3-0344 | TNRTODEDTHWAHEROREHDHUSLO | TNRTODEDTHWAHEROREHDHUSLO | THE SHOT HEARD ROUND THE WORLD | double_transposition | double_transposition | transposition | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 25 | 25 | cipher_museum | 2.0 | public | null | null |
cda-0011513 | CBGV EWYO QODP PGVT QCHA UWAQ ZXTI THIU UZQC SZZF | CBGV EWYO QODP PGVT QCHA UWAQ ZXTI THIU UZQC SZZF | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS | trithemius | trithemius | null | {} | medium | en | 40 | 40 | synthetic_educational | null | null | [] | |
kryha-v2-0349 | QBQCSENOAXXAQVETXSHTYDPRADSHUXYAJZZHKGTFUCIFSEQBVPZKSCKMMIDUZJXSZOURFDZGTTWFLXWIHDJE | QBQCSENOAXXAQVETXSHTYDPRADSHUXYAJZZHKGTFUCIFSEQBVPZKSCKMMIDUZJXSZOURFDZGTTWFLXWIHDJE | VENONA REVEALED THAT NUMEROUS SOVIET AGENTS HAD PENETRATED THE HIGHEST LEVELS OF THE US GOVERNMENT | kryha | kryha | machine | {
"type": "keyword",
"value": "PRAGUE"
} | expert | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
rot13-v3-0022 | QRNQ ZRA GRYY AB GNYRF | QRNQ ZRA GRYY AB GNYRF | DEAD MEN TELL NO TALES | rot13 | rot13 | substitution | {
"type": "none",
"value": null
} | beginner | en | 18 | 22 | cipher_museum | 2.0 | public | null | null |
great-cipher-172 | 148 116 165 171 134 148 137 148 134 181 170 161 116 165 170 163 153 108 153 116 165 170 163 153 170 161 170 147 144 134 159 153 108 153 167 180 179 110 134 100 158 | 148 116 165 171 134 148 137 148 134 181 170 161 116 165 170 163 153 108 153 116 165 170 163 153 170 161 170 147 144 134 159 153 108 153 167 180 179 110 134 100 158 | IN THE BEGINNING WAS THE WORD AND THE WORD WAS WITH GOD AND FULL OF GRACE | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "SECRET"
} | expert | en | 123 | 163 | cipher_museum | 0.2 | public | null | null |
cda-0013643 | BAABA AABBB AABAA BAAAA AAAAA ABAAA ABABA AABAB AABAA ABBAA AAABA AABAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BABAA BAAAA ABAAA BAABA AABAA BAAAB BAABA AABAA BABAB BAABA ABAAA ABBAA AAAAA BABBB ABAAA AABBA BABBB AAAAA AABBA ABBBA AAAAA BAABA BAABA AABAA BAAAA ABBAA BAABA AABBB AABAA ABABA ABAAA AAAAB BAAAA AAAAA BAAAA BA... | BAABA AABBB AABAA BAAAA AAAAA ABAAA ABABA AABAB AABAA ABBAA AAABA AABAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BABAA BAAAA ABAAA BAABA AABAA BAAAB BAABA AABAA BABAB BAABA ABAAA ABBAA AAAAA BABBB ABAAA AABBA BABBB AAAAA AABBA ABBBA AAAAA BAABA BAABA AABAA BAAAA ABBAA BAABA AABBB AABAA ABABA ABAAA AAAAB BAAAA AAAAA BAAAA BA... | THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS | bacon_cipher | bacon_cipher | null | {} | hard | en | 715 | 715 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
cda-0012090 | KORK XQHB AYDG JVHK ZQBY TJGE WEZQ LALA LTKU EMVM PBQN FILU NJOY NRCC XSVF TQCT JJGQ MFXN XTVT CPJG LYOT CCUI MSKT EUNC XCXG AMUZ | KORK XQHB AYDG JVHK ZQBY TJGE WEZQ LALA LTKU EMVM PBQN FILU NJOY NRCC XSVF TQCT JJGQ MFXN XTVT CPJG LYOT CCUI MSKT EUNC XCXG AMUZ | SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS HONESTLY | one_time_pad | one_time_pad | null | {} | hard | en | 104 | 104 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
kryha-131 | GPIUWYKVDCXSI | GPIUWYKVDCXSI | CHANGE OF PLANS | kryha | kryha | machine | {
"type": "keyword",
"value": "SECRET"
} | expert | en | 13 | 13 | cipher_museum | 0.2 | public | null | null |
cda-0007697 | IFIM EEUI UTSE RSED CNDO EALF NTIO RCRE SNIE XNCU TEYI NXBD QTRE CO | IFIM EEUI UTSE RSED CNDO EALF NTIO RCRE SNIE XNCU TEYI NXBD QTRE CO | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION | stager_route | stager_route | null | {
"cols": 6
} | medium | en | 54 | 54 | synthetic_educational | null | null | [] | |
two-square-090 | EPZUSTHEDSSTTBQLMEQKQYBUOLIZORSTTBQLMESX | EPZUSTHEDSSTTBQLMEQKQYBUOLIZORSTTBQLMESX | IT WAS THE BEST OF TIMES IT WAS THE WORST OF TIMES | two_square | two_square | polygraphic | {
"key1": "CIPHER",
"key2": "MUSEUM"
} | advanced | en | 40 | 40 | cipher_museum | 0.2 | public | null | null |
two-square-v3-0365 | QNERIGHTDLQNCQBQUFNNGLEESEFTBERARAMSQUOILNOTBELHFRLHDBGEVNHEFEDEARLGDZERNMENSY | QNERIGHTDLQNCQBQUFNNGLEESEFTBERARAMSQUOILNOTBELHFRLHDBGEVNHEFEDEARLGDZERNMENSY | THE RIGHT OF THE PEOPLE TO KEEP AND BEAR ARMS SHALL NOT BE INFRINGED BY THE FEDERAL GOVERNMENT | two_square | two_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
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