id stringlengths 7 52 | text stringlengths 6 2.11k | ciphertext stringlengths 6 2.11k | plaintext stringlengths 6 282 | label stringclasses 81
values | cipher stringclasses 81
values | cipher_family stringclasses 13
values | key unknown | difficulty stringclasses 7
values | language stringclasses 8
values | text_length int64 6 1.09k | length int64 6 1.28k | source stringclasses 2
values | dataset_version stringclasses 2
values | split stringclasses 1
value | attack_methods listlengths 0 3 ⌀ | educational_note stringclasses 32
values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
cda-0019302 | ¬ ┌· X· K L ⌐· ┘· ┌· r L ⌒ ┘· ┌· ┐ X ┘· ─ └ ⌒· ⌒ r· L ─ K r· L ┐ L ⌒· X ┐· ⌐ r L Γ· X X ┌ ⌐ └ └ ⌐ ┌ ┘· Γ L └ r ⌐ ─ r └ ⌐ X X Γ· ⌐· ⌒· ┐· ⌐ K K L ┌· ─ X ¬ X· K Γ· K r ⌐ ─ ⌐ └ X ┘· ¬ L ⌒ ┌· ┘· ─ ¬· ┐· ┘· └ ⌒· ⌐ └ ┐· r· ⌐ ¬ L K Γ· r r Γ· ┐· r· L ┌· X X· X L ┌ X· └ K Γ· ┐· └ L ⌐ └ ┐· r· ⌐ ¬ L K X r· Γ· ⌐· K X K r· L K· Γ· ... | ¬ ┌· X· K L ⌐· ┘· ┌· r L ⌒ ┘· ┌· ┐ X ┘· ─ └ ⌒· ⌒ r· L ─ K r· L ┐ L ⌒· X ┐· ⌐ r L Γ· X X ┌ ⌐ └ └ ⌐ ┌ ┘· Γ L └ r ⌐ ─ r └ ⌐ X X Γ· ⌐· ⌒· ┐· ⌐ K K L ┌· ─ X ¬ X· K Γ· K r ⌐ ─ ⌐ └ X ┘· ¬ L ⌒ ┌· ┘· ─ ¬· ┐· ┘· └ ⌒· ⌐ └ ┐· r· ⌐ ¬ L K Γ· r r Γ· ┐· r· L ┌· X X· X L ┌ X· └ K Γ· ┐· └ L ⌐ └ ┐· r· ⌐ ¬ L K X r· Γ· ⌐· K X K r· L K· Γ· ... | BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS THE VIGENERE CIPHER USES A REPEATING KEYWORD | pigpen | pigpen | null | {} | medium | en | 71 | 71 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
cda-0006797 | TEGEEEIEIHNSSLTBBPSOEKUIUYNSTILDPTSMEPCAPCMNSSIMRATOFIVXAPRNOLIXOUDCEOELCTORRIDCNWENTANTATRAEIET | TEGEEEIEIHNSSLTBBPSOEKUIUYNSTILDPTSMEPCAPCMNSSIMRATOFIVXAPRNOLIXOUDCEOELCTORRIDCNWENTANTATRAEIET | DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS | double_transposition | double_transposition | null | {
"key1": "MUSEUM",
"key2": "DRAGON"
} | hard | en | 96 | 96 | synthetic_educational | null | null | [
"key_length_search",
"anagram_recovery"
] | Double columnar transposition: apply columnar twice for stronger security. |
cda-0019389 | ABAA BAAB AABA AAAA AABA ABAA BAAB BBAB BABA ABAB AABA BBAA ABAB BBAB AAAA ABAA AABB AAAA ABAA BAAA ABBB AABA BAAA BAAB AAAB AAAA ABAB BABA AABB AABA AABB BAAB AABA AABB ABBA BAAA BBAA BAAA BAAA BABB ABAB BBAA BBBA AABB AABA AAAA BAAB AABA AABA ABAA AAAB ABAA BBBA AAAA ABAA AABA ABAA BBAA BAAA BBAA ABAA AAAB ABAA BAAA ... | ABAA BAAB AABA AAAA AABA ABAA BAAB BBAB BABA ABAB AABA BBAA ABAB BBAB AAAA ABAA AABB AAAA ABAA BAAA ABBB AABA BAAA BAAB AAAB AAAA ABAB BABA AABB AABA AABB BAAB AABA AABB ABBA BAAA BBAA BAAA BAAA BABB ABAB BBAA BBBA AABB AABA AAAA BAAB AABA AABA ABAA AAAB ABAA BBBA AAAA ABAA AABA ABAA BBAA BAAA BBAA ABAA AAAB ABAA BAAA ... | KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM | bacon_cipher | bacon_cipher | null | {} | hard | en | 345 | 345 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
zimmermann-v3-0061 | 00016 00000 99999 90001 90000 90019 90019 90011 90004 99998 00001 99999 90012 90008 90003 90022 90000 90024 99998 99999 90000 90012 90004 90017 90008 90002 90000 90013 99998 99999 90003 90008 90021 90004 99998 99999 90001 90014 90012 90001 90004 90017 90018 99998 99999 90003 90004 90018 90019 90017 90014 90024 90004 90... | 00016 00000 99999 90001 90000 90019 90019 90011 90004 99998 00001 99999 90012 90008 90003 90022 90000 90024 99998 99999 90000 90012 90004 90017 90008 90002 90000 90013 99998 99999 90003 90008 90021 90004 99998 99999 90001 90014 90012 90001 90004 90017 90018 99998 99999 90003 90004 90018 90019 90017 90014 90024 90004 90... | AT THE BATTLE OF MIDWAY AMERICAN DIVE BOMBERS DESTROYED FOUR JAPANESE CARRIERS IN MINUTES | zimmermann | zimmermann | codebook | {
"type": "none",
"value": null
} | expert | en | 455 | 545 | cipher_museum | 2.0 | public | null | null |
wallis-cipher-v2-0062 | 90 55 61 56 91 90 60 42 63 82 91 90 33 24 91 90 76 86 91 90 43 23 54 14 61 56 53 21 91 90 28 91 90 24 23 81 52 60 91 90 34 89 10 91 90 45 87 85 55 91 90 61 54 91 90 40 81 38 56 10 23 91 90 76 54 91 90 52 33 56 91 90 82 42 13 34 91 90 28 85 91 90 22 63 54 56 34 91 90 50 87 43 55 49 53 54 24 91 90 59 46 91 90 43 10 33 60... | 90 55 61 56 91 90 60 42 63 82 91 90 33 24 91 90 76 86 91 90 43 23 54 14 61 56 53 21 91 90 28 91 90 24 23 81 52 60 91 90 34 89 10 91 90 45 87 85 55 91 90 61 54 91 90 40 81 38 56 10 23 91 90 76 54 91 90 52 33 56 91 90 82 42 13 34 91 90 28 85 91 90 22 63 54 56 34 91 90 50 87 43 55 49 53 54 24 91 90 59 46 91 90 43 10 33 60... | THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME LIE DOWN IN GREEN PASTURES BY STILL WATERS | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "OXFORD"
} | expert | en | 234 | 350 | cipher_museum | 2.0 | public | null | null |
red-type-a-v3-0184 | ZIFODQIMZONIHADWOWDOMUPRUTIXLYWEVVWUMOUWUKBYSWUDEVCIGHIQCIBLLONYVRYYWNUWYKNJYVEUSR | ZIFODQIMZONIHADWOWDOMUPRUTIXLYWEVVWUMOUWUKBYSWUDEVCIGHIQCIBLLONYVRYYWNUWYKNJYVEUSR | HUMINT OR HUMAN INTELLIGENCE GATHERING RELIES ON PERSONAL CONTACT AND HUMAN SOURCES IN THE FIELD | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "YAMATO"
} | advanced | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
bazeries-v3-0607 | AGYYNOXSFSFVSNYGANOMSGSTAFHGHLFPGDSXJEHLYIDIAMMHAOOYMYCSFMVGMOAVGAIGPFYYISCSYLYD | AGYYNOXSFSFVSNYGANOMSGSTAFHGHLFPGDSXJEHLYIDIAMMHAOOYMYCSFMVGMOAVGAIGPFYYISCSYLYD | THE ENIGMA MACHINE HAD AN ASTRONOMICAL NUMBER OF POSSIBLE SETTINGS MAKING IT SEEM UNBREAKABLE | bazeries | bazeries | transposition | {
"type": "integer",
"value": 67
} | advanced | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
cda-0014296 | .- .-.. .- -. / - ..- .-. .. -. --. / -... .-. --- -.- . / . -. .. --. -- .- / .-- .. - .... / -.-. .-. .. -... ... / .- -. -.. / - .... . / -... --- -- -... . / -- .- -.-. .... .. -. . / ..-. .-. .. . -.. -- .- -. / . ... - .. -- .- - . -.. / -.- . -.-- / .-.. . -. --. - .... / ..-. .-. --- -- / ... - .- - .. ... - ..... | .- .-.. .- -. / - ..- .-. .. -. --. / -... .-. --- -.- . / . -. .. --. -- .- / .-- .. - .... / -.-. .-. .. -... ... / .- -. -.. / - .... . / -... --- -- -... . / -- .- -.-. .... .. -. . / ..-. .-. .. . -.. -- .- -. / . ... - .. -- .- - . -.. / -.- . -.-- / .-.. . -. --. - .... / ..-. .-. --- -- / ... - .- - .. ... - ..... | ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG | morse_code | morse_code | null | {} | hard | en | 132 | 132 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
cda-0015480 | oxed sheol okshy qotedy chor ypchol dal otaiin cheol ypchol otol dal rcheol raiin ykcheol daral oror shedy sheedy cheol qokedy dal qokeedy cheol ytaiin qokedy shor okshy daral raiin chedy ytedy qokeedy sheedy okeedy ykcheol ytedy okain ypchol okshy otol otaiin shal lkaiin shedy chedy kaiiin chol oror ypchol qokal shara... | oxed sheol okshy qotedy chor ypchol dal otaiin cheol ypchol otol dal rcheol raiin ykcheol daral oror shedy sheedy cheol qokedy dal qokeedy cheol ytaiin qokedy shor okshy daral raiin chedy ytedy qokeedy sheedy okeedy ykcheol ytedy okain ypchol okshy otol otaiin shal lkaiin shedy chedy kaiiin chol oror ypchol qokal shara... | OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER | voynich_render | voynich_render | null | {} | hard | en | 318 | 318 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
cda-0017046 | ADYE BESL KIDJ AHSM ILDV KPZI GBUT GJZO HYCC UUXM ZEOL AAHZ BIXC LHIF TZIC GBIR UEOA XKCA MCFE HYDM CBEH ATRB BBFJ EYHL JLJU EFRN DDAL VCTZ ACDX LRSM UHMI EWIA MYUR PIUV FTDE KPBH CEVC YJIU LJRY NL | ADYE BESL KIDJ AHSM ILDV KPZI GBUT GJZO HYCC UUXM ZEOL AAHZ BIXC LHIF TZIC GBIR UEOA XKCA MCFE HYDM CBEH ATRB BBFJ EYHL JLJU EFRN DDAL VCTZ ACDX LRSM UHMI EWIA MYUR PIUV FTDE KPBH CEVC YJIU LJRY NL | DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS | vernam | vernam | null | {} | hard | en | 158 | 158 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
scytale-175 | EKOHVEDOEEESRPHEYEAESRSKEAASCNBTRDRHEEEETVATHEKRAREUSYRTACWH | EKOHVEDOEEESRPHEYEAESRSKEAASCNBTRDRHEEEETVATHEKRAREUSYRTACWH | EVERY SECRET HAS A KEEPER AND EVERY CODE HAS A BREAKER WHO SEEKS THE TRUTH | scytale | scytale | transposition | {
"type": "integer",
"value": 4
} | intermediate | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
nomenclator-v3-0049 | 09 20 23 01 19 01 02 18 09 07 08 20 03 15 12 04 04 01 25 64 01 16 18 09 12 61 60 03 12 15 03 11 19 23 05 18 05 19 20 18 09 11 09 14 07 20 08 09 18 20 05 05 14 01 03 18 15 19 19 60 03 09 20 25 | 09 20 23 01 19 01 02 18 09 07 08 20 03 15 12 04 04 01 25 64 01 16 18 09 12 61 60 03 12 15 03 11 19 23 05 18 05 19 20 18 09 11 09 14 07 20 08 09 18 20 05 05 14 01 03 18 15 19 19 60 03 09 20 25 | IT WAS A BRIGHT COLD DAY IN APRIL AND THE CLOCKS WERE STRIKING THIRTEEN ACROSS THE CITY | nomenclator | nomenclator | nomenclator | {
"type": "none",
"value": null
} | expert | en | 128 | 191 | cipher_museum | 2.0 | public | null | null |
cda-0008818 | EETRC AITCA SEVEH AINTU ACERE DRNPG HTLHC SRSES HEOIC WUXYA APELU OIHRX SNTOR ETNPY IXYHM SSTSC HMTXS OOIRT ULEOY XTNDT EEBAR DMXEE EIARS SSEAX MSLOR STSTR TXNTT NRWII ENTX | EETRC AITCA SEVEH AINTU ACERE DRNPG HTLHC SRSES HEOIC WUXYA APELU OIHRX SNTOR ETNPY IXYHM SSTSC HMTXS OOIRT ULEOY XTNDT EEBAR DMXEE EIARS SSEAX MSLOR STSTR TXNTT NRWII ENTX | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS | scytale | scytale | null | {
"cols": 12
} | hard | en | 144 | 144 | synthetic_educational | null | null | [] | |
commercial-code-v2-0023 | ZUZUZ PAZUZ SAZUZ SAZUZ XAZUZ GAZUZ XUZUZ ZUZUZ PAZUZ LAZUZ TAZUZ XAZUZ XUZUZ ZUZUZ XAZUZ LAZUZ RAZUZ NAZUZ XUZUZ ZUZUZ XAZUZ KAZUZ LAZUZ TAZUZ XAZUZ XUZUZ | ZUZUZ PAZUZ SAZUZ SAZUZ XAZUZ GAZUZ XUZUZ ZUZUZ PAZUZ LAZUZ TAZUZ XAZUZ XUZUZ ZUZUZ XAZUZ LAZUZ RAZUZ NAZUZ XUZUZ ZUZUZ XAZUZ KAZUZ LAZUZ TAZUZ XAZUZ XUZUZ | LOOSE LIPS SINK SHIPS | commercial_code | commercial_code | codebook | {
"type": "none",
"value": null
} | expert | en | 130 | 155 | cipher_museum | 2.0 | public | null | null |
chaocipher-v3-0072 | DVOKYCJUYETRGYPLNDCPHGVEVARNDCHQXBPRKNBSHSZSOLRKHJUJYHKLREPGQIPFFCJMZ | DVOKYCJUYETRGYPLNDCPHGVEVARNDCHQXBPRKNBSHSZSOLRKHJUJYHKLREPGQIPFFCJMZ | THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
cda-0003160 | AVRX JBMO IFZC LJMB PYJC LKHR TEVO HRCP HAHF EEQF OOII PQWG MDBW IVPZ RXTG Y | AVRX JBMO IFZC LJMB PYJC LKHR TEVO HRCP HAHF EEQF OOII PQWG MDBW IVPZ RXTG Y | THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER | autokey | autokey | null | {
"primer": "HONEST"
} | medium | en | 61 | 61 | synthetic_educational | null | null | [
"running_key_analysis",
"index_of_coincidence"
] | Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack. |
hill-v2-0626 | ZAOSQKRCLCNQXCALRCANFFLPAGVAXWJNLIJXJERCSRQKWPDJRPUOZUMCHZPHXDOMBUCAPHCECQVBIKXZZOGDLIUOZBJVLBSIFCUQQKWPGGYZHDISGIXWNNZBNELMAGZUFIZALPLGYZNBTCFFMCMBUUHV | ZAOSQKRCLCNQXCALRCANFFLPAGVAXWJNLIJXJERCSRQKWPDJRPUOZUMCHZPHXDOMBUCAPHCECQVBIKXZZOGDLIUOZBJVLBSIFCUQQKWPGGYZHDISGIXWNNZBNELMAGZUFIZALPLGYZNBTCFFMCMBUUHV | 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 | hill | hill | polygraphic | {
"a": 11,
"b": 3,
"c": 2,
"d": 5
} | advanced | en | 152 | 152 | cipher_museum | 2.0 | public | null | null |
four-square-v3-0266 | QBAHTGQBGPTMGECUFSUMOOHDALQDDXDLZIQBGPRRMSGRBLDSGSIGTGXQAQDDTMICNQFLATUKEHOMATUNBLFP | QBAHTGQBGPTMGECUFSUMOOHDALQDDXDLZIQBGPRRMSGRBLDSGSIGTGXQAQDDTMICNQFLATUKEHOMATUNBLFP | SIGNALS INTELLIGENCE OR SIGINT INVOLVES INTERCEPTION AND ANALYSIS OF ELECTRONIC COMMUNICATIONS | four_square | four_square | polygraphic | {
"key1": "TRIUMPH",
"key2": "JUSTICE"
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
jn25-v2-0080 | 26199 26187 26184 26187 26184 26180 26101 26184 26193 26198 26183 26184 26182 26191 26180 26197 26184 26199 26187 26184 26186 26191 26194 26197 26104 26194 26185 26186 26194 26183 26180 26193 26183 26199 26187 26184 26185 26188 26197 26192 26180 26192 26184 26193 26199 26198 26187 26194 26102 26184 26199 26187 26185 26... | 26199 26187 26184 26187 26184 26180 26101 26184 26193 26198 26183 26184 26182 26191 26180 26197 26184 26199 26187 26184 26186 26191 26194 26197 26104 26194 26185 26186 26194 26183 26180 26193 26183 26199 26187 26184 26185 26188 26197 26192 26180 26192 26184 26193 26199 26198 26187 26194 26102 26184 26199 26187 26185 26... | THE HEAVENS DECLARE THE GLORY OF GOD AND THE FIRMAMENT SHOWETH FORTH HIS HANDIWORK EACH NIGHT | jn25 | jn25 | codebook | {
"type": "additive",
"value": "16180"
} | expert | en | 390 | 467 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-052 | NFZRRCYKDDAIUFJNUHHURCXJLJKEEEOCDYTYZCVXZDJILRKNBVAOBHTWFH | NFZRRCYKDDAIUFJNUHHURCXJLJKEEEOCDYTYZCVXZDJILRKNBVAOBHTWFH | IN THE BEGINNING WAS THE WORD AND THE WORD WAS WITH GOD AND FULL OF GRACE | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "STURGEON"
} | expert | en | 58 | 58 | cipher_museum | 0.2 | public | null | null |
cda-0014343 | 21 11 24 31 13 31 34 43 15 14 24 43 11 35 34 43 44 45 42 15 33 34 44 11 43 31 34 22 11 33 35 15 42 23 11 35 43 | 21 11 24 31 13 31 34 43 15 14 24 43 11 35 34 43 44 45 42 15 33 34 44 11 43 31 34 22 11 33 35 15 42 23 11 35 43 | FAIL CLOSED IS A POSTURE NOT A SLOGAN PERHAPS | polybius | polybius | null | {} | medium | en | 37 | 37 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
alberti-disk-v3-0682 | VOKZNOMFIDGFOOMFEDOBTHPESHSLHSEZYRRXTRYRKTJQESPQBSXKREZWCPLXVFQLFCKAMESMZS | VOKZNOMFIDGFOOMFEDOBTHPESHSLHSEZYRRXTRYRKTJQESPQBSXKREZWCPLXVFQLFCKAMESMZS | THE LIGHT YOU SEE FROM DISTANT STARS LEFT THOSE SUNS THOUSANDS OF YEARS BEFORE YOUR BIRTH | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 16
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0018137 | 66 36 82 68 80 52 36 50 66 82 52 66 59 80 82 61 36 69 59 57 11 77 68 55 82 77 50 61 59 61 82 36 68 80 11 82 80 52 69 57 59 77 29 68 80 66 80 68 29 61 65 69 61 50 66 50 69 29 80 82 68 11 61 52 69 57 59 77 29 61 50 29 55 82 43 69 80 11 82 80 | 66 36 82 68 80 52 36 50 66 82 52 66 59 80 82 61 36 69 59 57 11 77 68 55 82 77 50 61 59 61 82 36 68 80 11 82 80 52 69 57 59 77 29 68 80 66 80 68 29 61 65 69 61 50 66 50 69 29 80 82 68 11 61 52 69 57 59 77 29 61 50 29 55 82 43 69 80 11 82 80 | THE ARCHITECTURE SHOULD MAKE MISUSE HARDER COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | wallis_cipher | wallis_cipher | null | {} | hard | en | 80 | 80 | synthetic_educational | null | null | [
"number_substitution_decode",
"frequency_analysis"
] | Wallis cipher: each letter mapped to a unique two-digit number from a fixed table. |
morse-code-v2-0074 | .-. . -.-. --- -. -. --- .. - . .-. / - .... . / . -. . -- -.-- / .--. --- ... .. - .. --- -. / .- -. -.. / .-. . .--. --- .-. - / -... .- -.-. -.- / -... . ..-. --- .-. . / -. .. --. .... - ..-. .- .-.. .-.. / .-- .. - .... / .- / ..-. ..- .-.. .-.. / ... - .-. . -. --. - .... / -.-. --- ..- -. - | .-. . -.-. --- -. -. --- .. - . .-. / - .... . / . -. . -- -.-- / .--. --- ... .. - .. --- -. / .- -. -.. / .-. . .--. --- .-. - / -... .- -.-. -.- / -... . ..-. --- .-. . / -. .. --. .... - ..-. .- .-.. .-.. / .-- .. - .... / .- / ..-. ..- .-.. .-.. / ... - .-. . -. --. - .... / -.-. --- ..- -. - | RECONNOITER THE ENEMY POSITION AND REPORT BACK BEFORE NIGHTFALL WITH A FULL STRENGTH COUNT | morse_code | morse_code | encoding | {
"type": "none",
"value": null
} | beginner | en | 209 | 298 | cipher_museum | 2.0 | public | null | null |
copiale-v3-0187 | I3 M4 D5 Z4 H1 Q3 L1 G4 O1 B4 Y6 N5 J0 Q8 P0 M7 S8 C7 Q4 Q2 W1 N6 F0 P7 Q8 G6 N8 O7 I1 P7 E5 D4 D8 S7 K8 L7 I7 L5 E8 G5 S0 E6 H4 Q2 I1 O0 N7 O4 B4 Z4 H1 C0 Q3 P7 P2 I1 X3 Y6 G7 D5 O9 F0 N4 P0 D4 B6 C7 Q3 K1 R3 O0 S7 E6 K8 P0 C0 Y6 | I3 M4 D5 Z4 H1 Q3 L1 G4 O1 B4 Y6 N5 J0 Q8 P0 M7 S8 C7 Q4 Q2 W1 N6 F0 P7 Q8 G6 N8 O7 I1 P7 E5 D4 D8 S7 K8 L7 I7 L5 E8 G5 S0 E6 H4 Q2 I1 O0 N7 O4 B4 Z4 H1 C0 Q3 P7 P2 I1 X3 Y6 G7 D5 O9 F0 N4 P0 D4 B6 C7 Q3 K1 R3 O0 S7 E6 K8 P0 C0 Y6 | THE RIGHT OF THE PEOPLE TO KEEP AND BEAR ARMS SHALL NOT BE INFRINGED BY THE FEDERAL GOVERNMENT | copiale | copiale | substitution | {
"type": "keyword",
"value": "TEMPLE"
} | advanced | en | 154 | 230 | cipher_museum | 2.0 | public | null | null |
four-square-207 | DFTMSKEEEUKQTNFYGGOCIFGQFYNMEUNZDHEPURTIICSX | DFTMSKEEEUKQTNFYGGOCIFGQFYNMEUNZDHEPURTIICSX | FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT | four_square | four_square | polygraphic | {
"key1": "ENIGMA",
"key2": "CRYPTO"
} | advanced | en | 44 | 44 | cipher_museum | 0.2 | public | null | null |
m209-v3-0143 | KWABFNYNVOZPKZROXVNQL | KWABFNYNVOZPKZROXVNQL | THE EXPERIMENT CONFIRMS | m209 | m209 | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
caesar-v3-0538 | CANJLQNAH RW CQN LXDAC | CANJLQNAH RW CQN LXDAC | TREACHERY IN THE COURT | caesar | caesar | substitution | {
"type": "shift",
"value": 9
} | beginner | en | 19 | 22 | cipher_museum | 2.0 | public | null | null |
chaocipher-v2-0327 | AWKIISBYCSYOHJHCBNEETRPXDUZYYICTUFAQWJKRUEOYPQBLAVFABFONGSAFIPMMZAXVYLCVKANZY | AWKIISBYCSYOHJHCBNEETRPXDUZYYICTUFAQWJKRUEOYPQBLAVFABFONGSAFIPMMZAXVYLCVKANZY | THE REGIMENT SHALL ADVANCE AT FIRST LIGHT SUPPORTED BY ARTILLERY ON THE EASTERN FLANK TODAY | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-v2-0483 | LZWJWYAEWFLOADDZGDVALKHGKALAGFMFLADJWAFXGJUWEWFLKSJJANWXJGELZWWSKLWJFUGEESFVHGKLZWJW | LZWJWYAEWFLOADDZGDVALKHGKALAGFMFLADJWAFXGJUWEWFLKSJJANWXJGELZWWSKLWJFUGEESFVHGKLZWJW | THE REGIMENT WILL HOLD ITS POSITION UNTIL REINFORCEMENTS ARRIVE FROM THE EASTERN COMMAND POST HERE | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "DYNASTY"
} | beginner | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
affine-v2-0988 | EMPMZCX YZDMZI PAGLMZ YPM CXX UYGGAPWUCRWYPI INCXX LM MPUZKHRMD AIWPE RNM CHHZYJMD UWHNMZ DWIO | EMPMZCX YZDMZI PAGLMZ YPM CXX UYGGAPWUCRWYPI INCXX LM MPUZKHRMD AIWPE RNM CHHZYJMD UWHNMZ DWIO | GENERAL ORDERS NUMBER ONE ALL COMMUNICATIONS SHALL BE ENCRYPTED USING THE APPROVED CIPHER DISK | affine | affine | substitution | {
"a": 9,
"b": 2
} | beginner | en | 81 | 94 | cipher_museum | 2.0 | public | null | null |
bifid-v2-0449 | FTQKBDMRKDKFOEUEHTPTYQLUSDDURFFKBYQAEKTNSPQYXICSIYIBTBZKLLNXPYZYQYXISCCOXMEVT | FTQKBDMRKDKFOEUEHTPTYQLUSDDURFFKBYQAEKTNSPQYXICSIYIBTBZKLLNXPYZYQYXISCCOXMEVT | DEUTSCHLAND UBER ALLES IN DER WELT WENN ES STETS ZU SCHUTZ UND TRUTZE BRÜDERLICH ZUSAMMENHÄLT | bifid | bifid | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v2-0141 | ZROFIZSBMEIJBFZM | ZROFIZSBMEIJBFZM | ABORT AND WITHDRAW | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "AXUM"
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
rail-fence-v3-0062 | TRNVFNYHBIITOERONITEFTDHBEOUINRBOAEEANFRSEOAEIGSSGDMHTFTLNAKELNOTENTRIANE | TRNVFNYHBIITOERONITEFTDHBEOUINRBOAEEANFRSEOAEIGSSGDMHTFTLNAKELNOTENTRIANE | THE BATTLE OF BRITAIN RAGED IN THE SKIES ABOVE ENGLAND FOR FOUR MONTHS IN NINETEEN FORTY | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 7
} | intermediate | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
cda-0008848 | AOCIJ NTLKR ZSQEO EFCAX MVHFL DASHX RHZPW WDZQN QWBVL MYMPO YMSQQ VMYOV VLSAT RFHHV SKLVJ DCKEU VHVXC PBQYF FFIQI KAMOO ELLCO OQWGT TMCBO ZNSIH SRLBI ISFRG EOEUC UZPWW | AOCIJ NTLKR ZSQEO EFCAX MVHFL DASHX RHZPW WDZQN QWBVL MYMPO YMSQQ VMYOV VLSAT RFHHV SKLVJ DCKEU VHVXC PBQYF FFIQI KAMOO ELLCO OQWGT TMCBO ZNSIH SRLBI ISFRG EOEUC UZPWW | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION | trithemius | trithemius | null | {} | hard | en | 140 | 140 | synthetic_educational | null | null | [] | |
geheimschreiber-v3-0033 | CVRPDKHTBLSJ | CVRPDKHTBLSJ | YANKEE DOODLE | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "BERLIN"
} | expert | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
trifid-v3-0182 | TDHCIERFELPCZEINDKMLNFIFPADPUOUKERHFCRPYTYCDGDAHHTTOVGHLOFUPCFHOTTMETHXHMHVC | TDHCIERFELPCZEINDKMLNFIFPADPUOUKERHFCRPYTYCDGDAHHTTOVGHLOFUPCFHOTTMETHXHMHVC | THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
bifid-v2-0588 | BORGUEDTHIH | BORGUEDTHIH | HOLD THE LINE | bifid | bifid | fractionation | {
"type": "keyword",
"value": "TRIUMPH"
} | advanced | en | 11 | 11 | cipher_museum | 2.0 | public | null | null |
cda-0022166 | GSVZI XSRGV XGFIV HSLFO WNZPV NRHFH VSZIW VIUIR VWNZM VHGRN ZGVWP VBOVM TGSUI LNHGZ GRHGR XHXLO FNMZI GIZMH KLHRG RLMIV ZWHXL OFNMH RMPVB LIWVI GSVGI RGSVN RFHXR KSVIZ WEZMX VHGSV ZOKSZ YVGYB LMVKL HRGRL MVZXS OVGGV IKVIS ZKH | GSVZI XSRGV XGFIV HSLFO WNZPV NRHFH VSZIW VIUIR VWNZM VHGRN ZGVWP VBOVM TGSUI LNHGZ GRHGR XHXLO FNMZI GIZMH KLHRG RLMIV ZWHXL OFNMH RMPVB LIWVI GSVGI RGSVN RFHXR KSVIZ WEZMX VHGSV ZOKSZ YVGYB LMVKL HRGRL MVZXS OVGGV IKVIS ZKH | THE ARCHITECTURE SHOULD MAKE MISUSE HARDER FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER PERHAPS | atbash | atbash | null | {} | hard | en | 188 | 188 | synthetic_educational | null | null | [
"self_inverse_check",
"frequency_analysis"
] | Atbash maps A↔Z, B↔Y, … and is its own inverse. |
straddling-checkerboard-v3-0303 | 42522102976748282890533425222122281741022087322045682425414222822732265928592742522292267482828910076562876425228074221705631621425022222117635230148563291092505724223162152026229487322374828282022218340820724222145952929162122031442522905338624 | 42522102976748282890533425222122281741022087322045682425414222822732265928592742522292267482828910076562876425228074221705631621425022222117635230148563291092505724223162152026229487322374828282022218340820724222145952929162122031442522905338624 | THE ARMY WILL CROSS THE DELAWARE RIVER TONIGHT AT ELEVEN OCLOCK THE MEN WILL CARRY ONLY THEIR WEAPONS AND THREE DAYS OF RATIONS MARCH ROUTES AND OBJECTIVES WILL BE DISTRIBUTED TO COMMANDERS AT THE CROSSING | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "RASTONICEL"
} | advanced | en | 245 | 245 | cipher_museum | 2.0 | public | null | null |
straddling-checkerboard-v2-0201 | 626238232512923465269009227394212396241856012526657270703862322207698610023876346262323956238424094286322976 | 626238232512923465269009227394212396241856012526657270703862322207698610023876346262323956238424094286322976 | THE REGIMENT SHALL ADVANCE AT FIRST LIGHT SUPPORTED BY ARTILLERY ON THE EASTERN FLANK TODAY | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "LIONSTRACE"
} | advanced | en | 108 | 108 | cipher_museum | 2.0 | public | null | null |
hill-v2-0121 | ZTZWZIJYHKSEZXAUDVXHNONCZVAOPVOXACHKODIISAXSMSGZPYYIPIKWTGRCJUDQZILYRJTFVEZVVUMAHXWADVBGFELAEPFDPDDZTFRPEENAHKYKDPTZPFZDQMMTXZOXIGBUZWVMFMZWUGPKEINCGE | ZTZWZIJYHKSEZXAUDVXHNONCZVAOPVOXACHKODIISAXSMSGZPYYIPIKWTGRCJUDQZILYRJTFVEZVVUMAHXWADVBGFELAEPFDPDDZTFRPEENAHKYKDPTZPFZDQMMTXZOXIGBUZWVMFMZWUGPKEINCGE | AFTER AN UNEQUIVOCAL EXPERIENCE OF THE INEFFICIENCY OF THE SUBSISTING FEDERAL GOVERNMENT YOU ARE CALLED UPON TO DELIBERATE ON A NEW CONSTITUTION FOR THE UNITED STATES OF AMERICA | hill | hill | polygraphic | {
"a": 3,
"b": 5,
"c": 2,
"d": 9
} | advanced | en | 150 | 150 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0297 | BGNAGTQKGGZIUQCSYHLHUQPSODRFTVIFAQFLGVQKGPPSNYBKTZRRMUGETZIROBTGFGGQKCQAOB | BGNAGTQKGGZIUQCSYHLHUQPSODRFTVIFAQFLGVQKGPPSNYBKTZRRMUGETZIROBTGFGGQKCQAOB | FOR GOD SO LOVED THE WORLD THAT HE GAVE HIS ONLY SON THAT WHOEVER BELIEVES SHALL NOT PERISH | four_square | four_square | polygraphic | {
"key1": "TRIUMPH",
"key2": "JUSTICE"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
cda-0002202 | YDH AHBBPNH MPB DIQQHJ KWY JEY BHXWRH HVHRT BTBYHA JHHQB PJ DEJHBY YDRHPY AEQHO | YDH AHBBPNH MPB DIQQHJ KWY JEY BHXWRH HVHRT BTBYHA JHHQB PJ DEJHBY YDRHPY AEQHO | THE MESSAGE WAS HIDDEN BUT NOT SECURE EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | monoalphabetic | monoalphabetic | null | {
"alphabet": "PKXQHLNDICZOAJEGFRBYWVMSTU"
} | medium | en | 66 | 66 | synthetic_educational | null | null | [
"frequency_analysis",
"pattern_words",
"hill_climbing_lm"
] | Monoalphabetic substitution with an arbitrary 26-letter permutation. |
cda-0016643 | - .-. .- -. ... .--. --- ... .. - .. --- -. / -.-. .. .--. .... . .-. ... / .-. . .- .-. .-. .- -. --. . / .-.. . - - . .-. ... / .-- .. - .... --- ..- - / ... ..- -... ... - .. - ..- - .. --- -. / - .... . / . -. .. --. -- .- / -- .- -.-. .... .. -. . / ..- ... . -.. / .-. --- - --- .-. ... / - --- / -.-. .-. . .- - .... | - .-. .- -. ... .--. --- ... .. - .. --- -. / -.-. .. .--. .... . .-. ... / .-. . .- .-. .-. .- -. --. . / .-.. . - - . .-. ... / .-- .. - .... --- ..- - / ... ..- -... ... - .. - ..- - .. --- -. / - .... . / . -. .. --. -- .- / -- .- -.-. .... .. -. . / ..- ... . -.. / .-. --- - --- .-. ... / - --- / -.-. .-. . .- - .... | TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF | morse_code | morse_code | null | {} | hard | en | 208 | 208 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
rail-fence-v3-0528 | THESENATSEEDEERC | THESENATSEEDEERC | THE SENATE DECREES | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 12
} | intermediate | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
nihilist-089 | 78 59 58 56 80 67 88 89 57 27 80 65 86 60 57 37 96 49 78 86 68 30 67 55 46 88 68 30 67 55 46 89 86 30 78 59 | 78 59 58 56 80 67 88 89 57 27 80 65 86 60 57 37 96 49 78 86 68 30 67 55 46 88 68 30 67 55 46 89 86 30 78 59 | THE ONLY THING WE HAVE TO FEAR IS FEAR ITSELF | nihilist | nihilist | fractionation | {
"polybius": "CIPHER",
"keyword": "MUSEUM"
} | advanced | en | 72 | 107 | cipher_museum | 0.2 | public | null | null |
hill-257 | AKTNRFMHUYOFUCDL | AKTNRFMHUYOFUCDL | MEET AT THE OLD OAK | hill | hill | polygraphic | {
"a": 7,
"b": 5,
"c": 2,
"d": 3
} | advanced | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
cda-0016586 | ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨w38⟩ ⟨w08⟩ ⟨w22⟩ ⟨w32⟩ ⟨w22⟩ ⟨w38⟩ ⟨w32⟩ ⟨w20⟩ ⟨a37⟩ ⟨w08⟩ ⟨w04⟩ ⟨w32⟩ ⟨a07⟩ ⟨w08⟩ ⟨a25⟩ ⟨w32⟩ ⟨w10⟩ ⟨a07⟩ ⟨a23⟩ ⟨w32⟩ ⟨a07⟩ ⟨a17⟩ ⟨w22⟩ ⟨a19⟩ ⟨w20⟩ ⟨a13⟩ ⟨w20⟩ ⟨w08⟩ ⟨a25⟩ ⟨w20⟩ ⟨a17⟩ ⟨a25⟩ ⟨a19⟩ ⟨w32⟩ ⟨w26⟩ ⟨a19⟩ ⟨w08⟩ ⟨w04⟩ ⟨w22⟩ ⟨w32⟩ ⟨a07⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨a25⟩ ⟨w20⟩ ⟨a37⟩ ⟨a... | ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨w38⟩ ⟨w08⟩ ⟨w22⟩ ⟨w32⟩ ⟨w22⟩ ⟨w38⟩ ⟨w32⟩ ⟨w20⟩ ⟨a37⟩ ⟨w08⟩ ⟨w04⟩ ⟨w32⟩ ⟨a07⟩ ⟨w08⟩ ⟨a25⟩ ⟨w32⟩ ⟨w10⟩ ⟨a07⟩ ⟨a23⟩ ⟨w32⟩ ⟨a07⟩ ⟨a17⟩ ⟨w22⟩ ⟨a19⟩ ⟨w20⟩ ⟨a13⟩ ⟨w20⟩ ⟨w08⟩ ⟨a25⟩ ⟨w20⟩ ⟨a17⟩ ⟨a25⟩ ⟨a19⟩ ⟨w32⟩ ⟨w26⟩ ⟨a19⟩ ⟨w08⟩ ⟨w04⟩ ⟨w22⟩ ⟨w32⟩ ⟨a07⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨a25⟩ ⟨w20⟩ ⟨a37⟩ ⟨a... | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT | babington | babington | null | {} | medium | en | 54 | 54 | synthetic_educational | null | null | [
"nomenclator_frequency",
"symbol_mapping"
] | Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot. |
chinese-telegraph-v3-0280 | 5563 4614 4427 4871 5060 5741 4427 5060 4489 4934 5060 4998 4427 5963 4680 5488 5563 4614 4427 5397 5060 5060 5563 5060 4489 4154 4871 4871 4427 5741 4680 4871 4216 5645 5563 4680 5563 4680 5488 5563 4614 4427 4871 5060 5741 4427 5060 4489 4550 5060 5060 4361 5563 4614 4154 5563 4934 5060 5741 4427 5488 5563 4614 4427 ... | 5563 4614 4427 4871 5060 5741 4427 5060 4489 4934 5060 4998 4427 5963 4680 5488 5563 4614 4427 5397 5060 5060 5563 5060 4489 4154 4871 4871 4427 5741 4680 4871 4216 5645 5563 4680 5563 4680 5488 5563 4614 4427 4871 5060 5741 4427 5060 4489 4550 5060 5060 4361 5563 4614 4154 5563 4934 5060 5741 4427 5488 5563 4614 4427 ... | THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD | chinese_telegraph | chinese_telegraph | codebook | {
"type": "additive",
"value": "14142"
} | expert | en | 276 | 344 | cipher_museum | 2.0 | public | null | null |
adfgvx-v2-0248 | FDDAAVFVDGDVFVFDAVFDAXAXDVGAGGAXAVGXADGXFFGAFAFDVFGAAGGDGDGADAFAFADAGDDDVAAGDAAAXDAFDADDFFGFXAGAAFDGAAVFFAGAGAGFDAADAGFFVDGAVFXGGAGAGAGAXAXAVGGAVGXDXGGFAFXFGDDADDGFAFDFADAFFAVDDAXDXADAXDGFFAXFXFXFXFXAXDXDDAGAGDXAVAAGGADAVFVFAADAVAXGDDXAGFXAADVGFGADFGGAVFGDXFFXGGDAFAAFFVAFAVAXADFFGGDAGADDFDAADVDVAVAVAV | FDDAAVFVDGDVFVFDAVFDAXAXDVGAGGAXAVGXADGXFFGAFAFDVFGAAGGDGDGADAFAFADAGDDDVAAGDAAAXDAFDADDFFGFXAGAAFDGAAVFFAGAGAGFDAADAGFFVDGAVFXGGAGAGAGAXAXAVGGAVGXDXGGFAFXFGDDADDGFAFDFADAFFAVDDAXDXADAXDGFFAXFXFXFXFXAXDXDDAGAGDXAVAAGGADAVFVFAADAVAXGDDXAGFXAADVGFGADFGGAVFGDXFFXGGDAFAAFFVAFAVAXADFFGGDAGADDFDAADVDVAVAVAV | 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 | adfgvx | adfgvx | fractionation | {
"polybius": "LIBERTY",
"columnar": "FREEDOM"
} | advanced | en | 302 | 302 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v3-0761 | FBVMMLEWQLSF | FBVMMLEWQLSF | YANKEE DOODLE | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "71828"
} | intermediate | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
hill-v2-0194 | EXQOOUPGJSOXVNLLYCKLUIKXTGKXLYMCJOCROUKKNDNNWPFGIQPJPXXXLYZOOSAMSMJFMKCUDCSU | EXQOOUPGJSOXVNLLYCKLUIKXTGKXLYMCJOCROUKKNDNNWPFGIQPJPXXXLYZOOSAMSMJFMKCUDCSU | BLESSED ARE THE PURE IN HEART FOR THEY SHALL SEE GOD AND BLESSED ARE THE PEACEMAKERS AMONG US | hill | hill | polygraphic | {
"a": 5,
"b": 7,
"c": 2,
"d": 9
} | advanced | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
cda-0004179 | TIGE IXZS MBCZ ZFGW ENOA YMAQ FDMF VKSI LHQU CSUY ZRYG ZXLP OBQK IOGD VFRN MKBL FBSC SIQI NWHL AJSP HOIY ZLZB | TIGE IXZS MBCZ ZFGW ENOA YMAQ FDMF VKSI LHQU CSUY ZRYG ZXLP OBQK IOGD VFRN MKBL FBSC SIQI NWHL AJSP HOIY ZLZB | THE BEST LESSONS SHOW WHERE THE METHOD FAILS HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS | trithemius | trithemius | null | {} | hard | en | 88 | 88 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
cda-0011924 | cross opens lower unite motor needs along route troop radio again needs seeks phase outer swift input troop issue opens north route enter alert daily | cross opens lower unite motor needs along route troop radio again needs seeks phase outer swift input troop issue opens north route enter alert daily | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION | null_cipher | null_cipher | null | {} | hard | en | 125 | 125 | synthetic_educational | null | null | [
"acrostic_detection",
"first_letter_extraction"
] | Null/steganographic cipher: hidden message formed by first letters of words. |
cda-0012584 | DZEHT SAHTH ANZIE GAHAK HACLA GIAIH TSAHA SZIHN AASTS OSIDZ EHWOL LACHE EDIBE HNODA IHGAH DZEHD IBEHN ODAIH TSAHM OASID ZEHGA HTHAN ZIEWO LLACH EETKI NTSAH THANZ IETSA HASZI HTKIN TSAHW OLLAC HEEBE TKIND IBEHT HANZI EGAHT KINSH USHNO DAIHT HANZI ETKIN AKHA | DZEHT SAHTH ANZIE GAHAK HACLA GIAIH TSAHA SZIHN AASTS OSIDZ EHWOL LACHE EDIBE HNODA IHGAH DZEHD IBEHN ODAIH TSAHM OASID ZEHGA HTHAN ZIEWO LLACH EETKI NTSAH THANZ IETSA HASZI HTKIN TSAHW OLLAC HEEBE TKIND IBEHT HANZI EGAHT KINSH USHNO DAIHT HANZI ETKIN AKHA | ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION | navajo_code | navajo_code | null | {} | hard | en | 214 | 214 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
joseon-yeokhak-109 | AVILVYUVAAVILAOHAPZAOLXBLZAPVUDOLAOLYAPZUVISLYPUAOLTPUK | AVILVYUVAAVILAOHAPZAOLXBLZAPVUDOLAOLYAPZUVISLYPUAOLTPUK | TO BE OR NOT TO BE THAT IS THE QUESTION WHETHER TIS NOBLER IN THE MIND | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "CIPHER"
} | beginner | en | 55 | 55 | cipher_museum | 0.2 | public | null | null |
diana-v2-0105 | YTJPALJOJTLVJPCZQGOSUOPDZSUYQEXNUYTANSABQAPWBCRYZAWPWWNVWSSYKWJGMYNJAEQFFAADPDZHGCNN | YTJPALJOJTLVJPCZQGOSUOPDZSUYQEXNUYTANSABQAPWBCRYZAWPWWNVWSSYKWJGMYNJAEQFFAADPDZHGCNN | THE REGIMENT WILL HOLD ITS POSITION UNTIL REINFORCEMENTS ARRIVE FROM THE EASTERN COMMAND POST HERE | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "RANGER"
} | intermediate | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
beaufort-028 | BTRROFPYHMENNNK | BTRROFPYHMENNNK | EVACUATE THE BASE | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "FORTIFICATION"
} | intermediate | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
rail-fence-v3-0165 | AIIREITMDDVTONSMNTFWNESYAENUHOAABEEPCITEEYCODDAASEBLAIMSFJRRSATMRBRORRETEEUI | AIIREITMDDVTONSMNTFWNESYAENUHOAABEEPCITEEYCODDAASEBLAIMSFJRRSATMRBRORRETEEUI | AT THE BATTLE OF MIDWAY AMERICAN DIVE BOMBERS DESTROYED FOUR JAPANESE CARRIERS IN MINUTES | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 8
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
babington-v3-0085 | ⟨w02⟩ ⟨w28⟩ ⟨n04⟩ ⟨a14⟩ ⟨n04⟩ ⟨w02⟩ ⟨w07⟩ ⟨w28⟩ ⟨w01⟩ ⟨a02⟩ ⟨w28⟩ ⟨x2⟩ ⟨w12⟩ ⟨w01⟩ ⟨w26⟩ ⟨a02⟩ ⟨a14⟩ ⟨x2⟩ ⟨w28⟩ ⟨a20⟩ | ⟨w02⟩ ⟨w28⟩ ⟨n04⟩ ⟨a14⟩ ⟨n04⟩ ⟨w02⟩ ⟨w07⟩ ⟨w28⟩ ⟨w01⟩ ⟨a02⟩ ⟨w28⟩ ⟨x2⟩ ⟨w12⟩ ⟨w01⟩ ⟨w26⟩ ⟨a02⟩ ⟨a14⟩ ⟨x2⟩ ⟨w28⟩ ⟨a20⟩ | DEAD MEN TELL NO TALES | babington | babington | nomenclator | {
"type": "seed",
"value": "SCOTLAND"
} | expert | en | 98 | 117 | cipher_museum | 2.0 | public | null | null |
cda-0013332 | 44 23 15 32 15 43 43 11 22 15 52 11 43 23 24 14 14 15 33 12 45 44 33 34 44 43 15 13 45 42 15 11 43 44 42 34 33 22 13 31 11 24 32 33 15 15 14 43 43 44 42 34 33 22 15 51 24 14 15 33 13 15 | 44 23 15 32 15 43 43 11 22 15 52 11 43 23 24 14 14 15 33 12 45 44 33 34 44 43 15 13 45 42 15 11 43 44 42 34 33 22 13 31 11 24 32 33 15 15 14 43 43 44 42 34 33 22 15 51 24 14 15 33 13 15 | THE MESSAGE WAS HIDDEN BUT NOT SECURE A STRONG CLAIM NEEDS STRONG EVIDENCE | polybius | polybius | null | {} | medium | en | 62 | 62 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
playfair-v2-0451 | AFBCHRDPPDYSBMDPLRKCYIRCNVDSPNFLIMLQYTROWHYDKBPDSTHBYBDNLONDLZDYYVONMLSGINSTPOKP | AFBCHRDPPDYSBMDPLRKCYIRCNVDSPNFLIMLQYTROWHYDKBPDSTHBYBDNLONDLZDYYVONMLSGINSTPOKP | THE AMBASSADOR HAS RECEIVED OUR MOST URGENT DISPATCHES AND AWAITS INSTRUCTIONS FROM LONDON HQ | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
cda-0021508 | XYVPZ HWUTM RAMFP OZELR XWCIW ZLBZY XMDXA DIJBT SMFSR UJFWA RAHRF Z | XYVPZ HWUTM RAMFP OZELR XWCIW ZLBZY XMDXA DIJBT SMFSR UJFWA RAHRF Z | ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS | running_key | running_key | null | {} | medium | en | 56 | 56 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
cda-0013705 | 21 42 15 41 45 15 33 13 54 11 33 11 31 54 43 24 43 13 11 33 42 15 51 15 11 31 52 15 11 25 13 24 35 23 15 42 43 13 31 11 43 43 24 13 11 31 13 24 35 23 15 42 43 44 15 11 13 23 52 23 54 32 34 14 15 42 33 43 15 13 45 42 24 44 54 32 11 44 44 15 42 43 44 42 11 33 43 35 34 43 24 44 24 34 33 13 24 35 23 15 42 43 42 15 11 42 42... | 21 42 15 41 45 15 33 13 54 11 33 11 31 54 43 24 43 13 11 33 42 15 51 15 11 31 52 15 11 25 13 24 35 23 15 42 43 13 31 11 43 43 24 13 11 31 13 24 35 23 15 42 43 44 15 11 13 23 52 23 54 32 34 14 15 42 33 43 15 13 45 42 24 44 54 32 11 44 44 15 42 43 44 42 11 33 43 35 34 43 24 44 24 34 33 13 24 35 23 15 42 43 42 15 11 42 42... | FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION | polybius | polybius | null | {} | hard | en | 137 | 137 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
zimmermann-v3-0029 | 00000 99999 90017 90004 90003 90002 90014 90000 90019 90018 99998 00015 99999 90002 90014 90012 90008 90013 90006 99998 | 00000 99999 90017 90004 90003 90002 90014 90000 90019 90018 99998 00015 99999 90002 90014 90012 90008 90013 90006 99998 | THE REDCOATS ARE COMING | zimmermann | zimmermann | codebook | {
"type": "none",
"value": null
} | expert | en | 100 | 119 | cipher_museum | 2.0 | public | null | null |
homophonic-v2-0001 | 46 72 58 22 95 45 33 58 49 71 36 | 46 72 58 22 95 45 33 58 49 71 36 | HOLD THE LINE | homophonic | homophonic | substitution | {
"type": "keyword",
"value": "PALACE"
} | intermediate | en | 22 | 32 | cipher_museum | 2.0 | public | null | null |
kryptos-v3-0180 | HUKLRJGWVWJMJHSEKOXTSVQKYDIJYTAMBVZVBDWXTFNMWTVLGOVZMHTLCZXHUMNWFHTPJPYPTH | HUKLRJGWVWJMJHSEKOXTSVQKYDIJYTAMBVZVBDWXTFNMWTVLGOVZMHTLCZXHUMNWFHTPJPYPTH | WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "LANGLEY"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
purple-v2-0164 | SJNTATRGUEJOGMMFGBLYVD | SJNTATRGUEJOGMMFGBLYVD | FLEET ASSEMBLES AT HARBOR | purple | purple | machine | {
"type": "seed",
"value": "YAMAMOTO"
} | expert | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
cda-0019653 | WMSOX EUTSW LZVUH DSCLP JQPJO BRJTT NRONK UTBRU NJOGV RXPCL QULBM HDBXU WKKFE BCSKI HSGTB LTJRU IDAVR MBDWM NKIYU XXTEP HWQEZ KCJMP NWCUX GVABY PJQGC JGQDN HEIRL DCEJV NGIAH KQCXM AAEDA DDVNP WXSXL BXDIW VSWNF MWQKR PNMZB MJ | WMSOX EUTSW LZVUH DSCLP JQPJO BRJTT NRONK UTBRU NJOGV RXPCL QULBM HDBXU WKKFE BCSKI HSGTB LTJRU IDAVR MBDWM NKIYU XXTEP HWQEZ KCJMP NWCUX GVABY PJQGC JGQDN HEIRL DCEJV NGIAH KQCXM AAEDA DDVNP WXSXL BXDIW VSWNF MWQKR PNMZB MJ | ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY | one_time_pad | one_time_pad | null | {} | hard | en | 187 | 187 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
running-key-v2-0053 | OBTFFHPKQYKGA | OBTFFHPKQYKGA | STAY THE COURSE | running_key | running_key | polyalphabetic | {
"type": "text",
"value": "Lincoln Second Inaugural"
} | intermediate | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-071 | ZXMIIMNRDORQM | ZXMIIMNRDORQM | CHANGE OF PLANS | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 13 | 13 | cipher_museum | 0.2 | public | null | null |
two-square-v3-0349 | DBNEARMQHEDOANKCORHEDTOTHEPAATIEOUGHDBRCAKOAPDSKBFOPKWTYMIHBXGDESEQNDLRULH | DBNEARMQHEDOANKCORHEDTOTHEPAATIEOUGHDBRCAKOAPDSKBFOPKWTYMIHBXGDESEQNDLRULH | GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN | two_square | two_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
hill-v3-0137 | QWFMWSJCNDFG | QWFMWSJCNDFG | YANKEE DOODLE | hill | hill | polygraphic | {
"a": 5,
"b": 7,
"c": 2,
"d": 9
} | advanced | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
kl7-v2-0292 | JQIRPRRETJJGLWPQHHOQGTTW | JQIRPRRETJJGLWPQHHOQGTTW | NORTH STAR HOLDS FIRM COURSE | kl7 | kl7 | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
diana-v3-0522 | HDEBQJXFDYSAAQWHEX | HDEBQJXFDYSAAQWHEX | CROSS THE RUBICON NOW | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
cda-0017160 | UQCHB CEMMC BNJWJ QQSDF OGRXQ PGAUQ CMIHU XOXPP LIEKK OWCEZ AQPDN LXMUA PPXTP RJKGC TXLYM QFTQE LRPMY NTRIE AOXYH ASPSR ESCZT MOVAX TOFVM TOFL | UQCHB CEMMC BNJWJ QQSDF OGRXQ PGAUQ CMIHU XOXPP LIEKK OWCEZ AQPDN LXMUA PPXTP RJKGC TXLYM QFTQE LRPMY NTRIE AOXYH ASPSR ESCZT MOVAX TOFVM TOFL | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS THE MESSAGE WAS HIDDEN BUT NOT SECURE | vernam | vernam | null | {} | hard | en | 119 | 119 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
kryptos-034 | IOZDDCQECGCBDMTJQHDQDWBBAMJPOYBACLDINGC | IOZDDCQECGCBDMTJQHDQDWBBAMJPOYBACLDINGC | IT WAS THE BEST OF TIMES IT WAS THE WORST OF TIMES | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "KRYPTOS"
} | advanced | en | 39 | 39 | cipher_museum | 0.2 | public | null | null |
jn25-v3-0223 | 21244 21232 21239 21243 21233 21239 21231 21239 21236 21239 21231 21233 21248 21243 | 21244 21232 21239 21243 21233 21239 21231 21239 21236 21239 21231 21233 21248 21243 | THE SIEGE BEGINS | jn25 | jn25 | codebook | {
"type": "additive",
"value": "11235"
} | expert | en | 70 | 83 | cipher_museum | 2.0 | public | null | null |
enigma-v2-1010 | RZUXJCLWVGANESSTNGVLGTM | RZUXJCLWVGANESSTNGVLGTM | CARTHAGE MUST BE DESTROYED | enigma | enigma | machine | {
"type": "rotor_start",
"value": "AAB"
} | expert | en | 23 | 23 | cipher_museum | 2.0 | public | null | null |
cda-0021636 | - .... . / .--. .-.. .- -.-- ..-. .- .. .-. / -.-. .. .--. .... . .-. / . -. -.-. .-. -.-- .--. - ... / .--. .- .. .-. ... / --- ..-. / .-.. . - - . .-. ... / ... .. -- ..- .-.. - .- -. . --- ..- ... .-.. -.-- / - .... . / .-.. .. -... .-. .- .-. -.-- / .--. .-. . ... . .-. ...- . ... / -.- -. --- .-- .-.. . -.. --. . ... | - .... . / .--. .-.. .- -.-- ..-. .- .. .-. / -.-. .. .--. .... . .-. / . -. -.-. .-. -.-- .--. - ... / .--. .- .. .-. ... / --- ..-. / .-.. . - - . .-. ... / ... .. -- ..- .-.. - .- -. . --- ..- ... .-.. -.-- / - .... . / .-.. .. -... .-. .- .-. -.-- / .--. .-. . ... . .-. ...- . ... / -.- -. --- .-- .-.. . -.. --. . ... | THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | morse_code | morse_code | null | {} | hard | en | 96 | 96 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
cda-0021659 | . ... ... . . . .... ... .... ... .. .... . ... . . ... . . ... .. .... ... ..... .. ... . ..... .... .. .... ... .... .... . ..... . . . ... .. ... ..... .. .. ... ..... .... ... .. ... .... . .... . ..... .... .. ... ... .... ... . ..... . ... .... ..... .... .. .. .... .... .... ... | . ... ... . . . .... ... .... ... .. .... . ... . . ... . . ... .. .... ... ..... .. ... . ..... .... .. .... ... .... .... . ..... . . . ... .. ... ..... .. .. ... ..... .... ... .. ... .... . .... . ..... .... .. ... ... .... ... . ..... . ... .... ..... .... .. .. .... .... .... ... | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF | tap_code | tap_code | null | {} | hard | en | 96 | 96 | 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. |
nihilist-184 | 55 24 43 37 75 23 26 43 38 67 54 36 42 28 44 24 57 74 | 55 24 43 37 75 23 26 43 38 67 54 36 42 28 44 24 57 74 | SEND REINFORCEMENTS | nihilist | nihilist | fractionation | {
"polybius": "ENIGMA",
"keyword": "NIHIL"
} | advanced | en | 36 | 53 | cipher_museum | 0.2 | public | null | null |
cda-0013915 | 2.3.8 10.1.7 10.1.1 1.5.4 3.6.9 8.4.2 16.1.7 20.5.5 2.6.10 2.4.7 12.1.9 16.5.10 12.6.3 16.6.3 17.2.10 14.1.2 9.6.6 19.1.9 13.6.7 6.3.10 6.4.5 9.5.6 17.5.2 15.2.8 3.4.7 13.4.3 2.5.3 16.3.7 14.4.1 19.3.6 8.3.3 9.1.2 3.2.9 1.2.9 3.2.6 16.5.1 12.6.9 9.1.4 17.4.6 11.3.7 5.3.3 3.2.3 13.2.7 15.3.6 3.4.1 20.3.1 19.2.7 2.2.7 10... | 2.3.8 10.1.7 10.1.1 1.5.4 3.6.9 8.4.2 16.1.7 20.5.5 2.6.10 2.4.7 12.1.9 16.5.10 12.6.3 16.6.3 17.2.10 14.1.2 9.6.6 19.1.9 13.6.7 6.3.10 6.4.5 9.5.6 17.5.2 15.2.8 3.4.7 13.4.3 2.5.3 16.3.7 14.4.1 19.3.6 8.3.3 9.1.2 3.2.9 1.2.9 3.2.6 16.5.1 12.6.9 9.1.4 17.4.6 11.3.7 5.3.3 3.2.3 13.2.7 15.3.6 3.4.1 20.3.1 19.2.7 2.2.7 10... | A TRANSPARENT TOOL SHOULD SHOW ITS REASONING DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS | arnold_andre | arnold_andre | null | {} | hard | en | 120 | 120 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Arnold-André book cipher: coordinates (page.section.word) referencing a shared text. |
rot13-la-007 | FRANGHF CBCHYHFDHR EBZNAHF | FRANGHF CBCHYHFDHR EBZNAHF | SENATUS POPULUSQUE ROMANUS | rot13 | rot13 | substitution | {
"type": "none",
"value": null
} | beginner | la | 24 | 26 | cipher_museum | 0.2 | public | null | null |
cda-0017172 | 11 50 25 80 68 65 36 68 29 11 66 80 50 25 80 68 65 36 76 80 82 72 59 82 29 52 50 82 61 82 73 65 69 61 82 61 50 77 65 57 82 52 50 65 36 82 80 61 11 50 76 76 50 82 68 29 11 36 82 57 57 77 68 29 50 29 66 80 69 11 59 52 82 11 65 59 20 57 50 52 55 82 43 52 80 43 65 66 69 25 80 68 65 36 43 50 29 29 50 29 82 66 82 82 29 61 82... | 11 50 25 80 68 65 36 68 29 11 66 80 50 25 80 68 65 36 76 80 82 72 59 82 29 52 50 82 61 82 73 65 69 61 82 61 50 77 65 57 82 52 50 65 36 82 80 61 11 50 76 76 50 82 68 29 11 36 82 57 57 77 68 29 50 29 66 80 69 11 59 52 82 11 65 59 20 57 50 52 55 82 43 52 80 43 65 66 69 25 80 68 65 36 43 50 29 29 50 29 82 66 82 82 29 61 82... | DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | wallis_cipher | wallis_cipher | null | {} | hard | en | 212 | 212 | 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-0012308 | THEBX FIDCX PHERX OMBIZ ESAPO LYBIU SSQUZ REWIX HTRAN SPOSI TIONT HETRI THEMI USCIZ HERAD VANCE STHEX LPHAX ETBYO NEPOS ITIOZ EACHL ETTER | THEBX FIDCX PHERX OMBIZ ESAPO LYBIU SSQUZ REWIX HTRAN SPOSI TIONT HETRI THEMI USCIZ HERAD VANCE STHEX LPHAX ETBYO NEPOS ITIOZ EACHL ETTER | THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER | commercial_code | commercial_code | null | {} | hard | en | 115 | 115 | synthetic_educational | null | null | [
"codebook_frequency",
"five_letter_group_analysis"
] | Commercial code: five-letter groups from a codebook, often ending in X or Z. |
bazeries-v2-0494 | MJGYAQPXHPBTMYAKYAGFAPBTFVQJIGFHYAQIYHAQYDTYBGJQEIBIVJFKIYYMPYMSQPTFYGYAOYHAQYQYTBPYGBQPYAMYQFVGPYMYAPAQYMJQGSJPXHTFYGYABYHAQYFKYAQIMNJPAQJYQAEBPPYIPSPBAMJNFPYHFIYD | MJGYAQPXHPBTMYAKYAGFAPBTFVQJIGFHYAQIYHAQYDTYBGJQEIBIVJFKIYYMPYMSQPTFYGYAOYHAQYQYTBPYGBQPYAMYQFVGPYMYAPAQYMJQGSJPXHTFYGYABYHAQYFKYAQIMNJPAQJYQAEBPPYIPSPBAMJNFPYHFIYD | THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME TO LIE DOWN IN GREEN PASTURES HE LEADETH ME BESIDE THE STILL WATERS HE RESTORETH MY SOUL HE LEADETH ME IN THE PATHS OF RIGHTEOUSNESS FOR HIS NAME SAKE | bazeries | bazeries | transposition | {
"type": "integer",
"value": 41
} | advanced | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
m209-040 | IAKXGSSYVYWMQRKUYDZDCYYLDRDHZMVDSSRAJZLLLLNZRCBM | IAKXGSSYVYWMQRKUYDZDCYYLDRDHZMVDSSRAJZLLLLNZRCBM | WE SHALL FIGHT ON THE BEACHES AND WE SHALL NEVER SURRENDER | m209 | m209 | machine | {
"type": "seed",
"value": "HAGELIN"
} | expert | en | 48 | 48 | cipher_museum | 0.2 | public | null | null |
adfgvx-v3-0479 | FDGAADDFDFAFFDADADAGGAAAAFVFDDFGDDFVFGFFVXFXXDDDXFDVDVAFDAAFDDAAFDDAGDAAAFAGAGDXDVVVDVGGVDADVGVVVGAGGGGFAVDFXGGFGVXGADGDVDGVVVGFFADFAFAAAFGFAVAAFAAAADFFAF | FDGAADDFDFAFFDADADAGGAAAAFVFDDFGDDFVFGFFVXFXXDDDXFDVDVAFDAAFDDAAFDDAGDAAAFAGAGDXDVVVDVGGVDADVGVVVGAGGGGFAVDFXGGFGVXGADGDVDGVVVGFFADFAFAAAFGFAVAAFAAAADFFAF | ON D DAY THE ALLIED FORCES LANDED ON FIVE NORMANDY BEACHES IN THE GREATEST SEABORNE INVASION | adfgvx | adfgvx | fractionation | {
"polybius": "KAISER",
"columnar": "BERLIN"
} | advanced | en | 154 | 154 | cipher_museum | 2.0 | public | null | null |
chinese-telegraph-v3-0196 | 8854 7654 7467 8038 7720 8038 8603 7654 7467 7338 8100 8685 8437 8528 7467 8100 7529 7654 8685 7974 7194 8038 7467 8781 7467 8038 8603 8528 7720 8603 7256 7467 7338 8100 7974 7467 8528 8038 7467 7338 7467 8528 8528 7194 8437 9003 7529 8100 8437 8100 8038 7467 8206 7467 8100 8206 7911 7467 8603 8100 7401 7720 8528 8528 ... | 8854 7654 7467 8038 7720 8038 8603 7654 7467 7338 8100 8685 8437 8528 7467 8100 7529 7654 8685 7974 7194 8038 7467 8781 7467 8038 8603 8528 7720 8603 7256 7467 7338 8100 7974 7467 8528 8038 7467 7338 7467 8528 8528 7194 8437 9003 7529 8100 8437 8100 8038 7467 8206 7467 8100 8206 7911 7467 8603 8100 7401 7720 8528 8528 ... | WHEN IN THE COURSE OF HUMAN EVENTS IT BECOMES NECESSARY FOR ONE PEOPLE TO DISSOLVE THE POLITICAL BANDS WHICH HAVE CONNECTED THEM WITH ANOTHER THEY SHOULD DECLARE THE CAUSES WHICH IMPEL THE SEPARATION | chinese_telegraph | chinese_telegraph | codebook | {
"type": "additive",
"value": "27182"
} | expert | en | 668 | 834 | cipher_museum | 2.0 | public | null | null |
cda-0012800 | AGAI NTAK ESRI GHTA BOVE NIGH TSHO REPO INTA GAIN RANG EEXA CTNO RTHT ROOP TURN SOTH EROP ENSL IGHT SHOR EHOU SEOT HERU NITE LEAD SDEP OTSE EKSH OURS OPEN S | AGAI NTAK ESRI GHTA BOVE NIGH TSHO REPO INTA GAIN RANG EEXA CTNO RTHT ROOP TURN SOTH EROP ENSL IGHT SHOR EHOU SEOT HERU NITE LEAD SDEP OTSE EKSH OURS OPEN S | A TRANSPARENT TOOL SHOULD SHOW ITS REASONING HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS | 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. |
cda-0008428 | CRNLF PRAUH DNCSA OYUOR CFPFT CERYW EHILU HIUNT IUSNH DLTLN INIAA PTRNN EECEY DEECE FIIRB CTTSC KDDOG SCIIA ITLES NDULE DCTAE OLPNA PRAAR GHINR IEREN CLCXU SMSTN EAETP HIFNR EOEST TOEUE IFIES CEAAA UEY | CRNLF PRAUH DNCSA OYUOR CFPFT CERYW EHILU HIUNT IUSNH DLTLN INIAA PTRNN EECEY DEECE FIIRB CTTSC KDDOG SCIIA ITLES NDULE DCTAE OLPNA PRAAR GHINR IEREN CLCXU SMSTN EAETP HIFNR EOEST TOEUE IFIES CEAAA UEY | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY THE INDEX OF COINCIDENCE IS A USEFUL CLUE | stager_route | stager_route | null | {
"cols": 12
} | hard | en | 168 | 168 | synthetic_educational | null | null | [] | |
cda-0016663 | cross raids yield phase three opens guard raids again point holds young raids eight watch after roads daily scout point alert takes incur exact naval | cross raids yield phase three opens guard raids again point holds young raids eight watch after roads daily scout point alert takes incur exact naval | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER EVERY SYSTEM NEEDS AN HONEST THREAT MODEL | 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. |
cda-0020873 | 2 18 21 20 5 6 15 18 3 5 23 15 18 11 19 15 14 12 25 23 8 5 14 20 8 5 11 5 25 19 16 1 3 5 9 19 19 13 1 12 12 | 2 18 21 20 5 6 15 18 3 5 23 15 18 11 19 15 14 12 25 23 8 5 14 20 8 5 11 5 25 19 16 1 3 5 9 19 19 13 1 12 12 | BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL | aeneas_tacticus | aeneas_tacticus | null | {} | medium | en | 41 | 41 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
cda-0019163 | 19.6.5 3.5.6 4.3.4 1.2.6 1.3.7 7.3.9 4.6.7 4.5.4 20.5.9 6.5.6 4.1.7 2.3.7 10.2.4 2.4.10 7.3.9 4.1.2 8.2.6 2.6.9 2.1.3 5.1.7 18.2.5 1.1.5 9.6.1 13.3.4 9.1.9 19.5.5 2.6.3 17.5.3 10.5.9 17.5.1 6.1.10 11.1.3 19.2.4 14.6.2 14.4.5 6.1.3 17.6.2 19.6.7 5.6.6 15.4.7 9.2.10 15.5.3 19.4.8 18.5.10 11.1.5 3.6.6 8.3.10 13.3.2 2.2.6 ... | 19.6.5 3.5.6 4.3.4 1.2.6 1.3.7 7.3.9 4.6.7 4.5.4 20.5.9 6.5.6 4.1.7 2.3.7 10.2.4 2.4.10 7.3.9 4.1.2 8.2.6 2.6.9 2.1.3 5.1.7 18.2.5 1.1.5 9.6.1 13.3.4 9.1.9 19.5.5 2.6.3 17.5.3 10.5.9 17.5.1 6.1.10 11.1.3 19.2.4 14.6.2 14.4.5 6.1.3 17.6.2 19.6.7 5.6.6 15.4.7 9.2.10 15.5.3 19.4.8 18.5.10 11.1.5 3.6.6 8.3.10 13.3.2 2.2.6 ... | MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF | arnold_andre | arnold_andre | null | {} | hard | en | 95 | 95 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Arnold-André book cipher: coordinates (page.section.word) referencing a shared text. |
cda-0015909 | 44 23 15 42 11 24 31 21 15 33 13 15 13 24 35 23 15 42 52 42 24 44 15 43 44 15 53 44 24 33 11 55 24 22 55 11 22 35 11 44 44 15 42 33 21 11 24 31 13 31 34 43 15 14 24 43 11 35 34 43 44 45 42 15 33 34 44 11 43 31 34 22 11 33 | 44 23 15 42 11 24 31 21 15 33 13 15 13 24 35 23 15 42 52 42 24 44 15 43 44 15 53 44 24 33 11 55 24 22 55 11 22 35 11 44 44 15 42 33 21 11 24 31 13 31 34 43 15 14 24 43 11 35 34 43 44 45 42 15 33 34 44 11 43 31 34 22 11 33 | THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN FAIL CLOSED IS A POSTURE NOT A SLOGAN | polybius | polybius | null | {} | medium | en | 74 | 74 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
jefferson-disk-v3-0193 | HGQPZCUZNHZHUZFOIRH | HGQPZCUZNHZHUZFOIRH | AVE MARIA GRATIA PLENA | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "1,3,5,2,4,6"
} | expert | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
affine-v3-0723 | HFZALONH SNKPNCNG OILO OIN VYNQLRPYNG KPUN PH YFO JFAOI KPCPYB LYG OILO JPHGFR SNBPYH JPOI OIN LGRPHHPFY FU FYNH FJY PBYFALYZN OIPH LMMAFLZI OF DYFJKNGBN ILH BVPGNG JNHONAY MIPKFHFMIX UFA OJF RPKKNYYPL | HFZALONH SNKPNCNG OILO OIN VYNQLRPYNG KPUN PH YFO JFAOI KPCPYB LYG OILO JPHGFR SNBPYH JPOI OIN LGRPHHPFY FU FYNH FJY PBYFALYZN OIPH LMMAFLZI OF DYFJKNGBN ILH BVPGNG JNHONAY MIPKFHFMIX UFA OJF RPKKNYYPL | 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 | affine | affine | substitution | {
"a": 7,
"b": 11
} | beginner | en | 170 | 201 | cipher_museum | 2.0 | public | null | null |
trifid-v2-0139 | FPMKHDACDTFEY | FPMKHDACDTFEY | STAY THE COURSE | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
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