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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
monoalphabetic-014 | ZJJ GQ JMQS PASPAZS | ZJJ GQ JMQS PASPAZS | ALL IS LOST RETREAT | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "ZEBRA"
} | beginner | en | 16 | 19 | cipher_museum | 0.2 | public | null | null |
lorenz-v2-0491 | BREVJTYISTHESOULOFWITANDTEDIOUSNESSTHEOUTWARDELOURISHES | BREVJTYISTHESOULOFWITANDTEDIOUSNESSTHEOUTWARDELOURISHES | BREVITY IS THE SOUL OF WIT AND TEDIOUSNESS THE OUTWARD FLOURISHES | lorenz | lorenz | machine | {
"type": "seed",
"value": "STURGEON"
} | expert | en | 55 | 55 | cipher_museum | 2.0 | public | null | null |
alberti-disk-062 | GJUUEZLPUT | GJUUEZLPUT | FLEE AT ONCE | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 7
} | expert | en | 10 | 10 | cipher_museum | 0.2 | public | null | null |
fialka-v3-0106 | XVDYNYNYTGSTHBUBFJ | XVDYNYNYTGSTHBUBFJ | CROSS THE RUBICON NOW | fialka | fialka | machine | {
"type": "seed",
"value": "KREMLIN"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
copiale-v2-0170 | E0 O1 E9 B6 E4 N3 K7 N3 C6 D5 R0 G6 F1 M8 G4 N7 R0 J0 L7 I1 N9 O9 H4 S7 P5 E1 L5 K2 N2 S7 P2 J0 D8 G4 N5 L7 I3 L5 P8 R3 G6 C7 C6 E8 L2 A2 F7 F0 R3 D5 E4 E1 D8 L7 A2 F0 O7 N9 M2 U2 N5 I1 H5 E1 M7 E6 E0 P0 | E0 O1 E9 B6 E4 N3 K7 N3 C6 D5 R0 G6 F1 M8 G4 N7 R0 J0 L7 I1 N9 O9 H4 S7 P5 E1 L5 K2 N2 S7 P2 J0 D8 G4 N5 L7 I3 L5 P8 R3 G6 C7 C6 E8 L2 A2 F7 F0 R3 D5 E4 E1 D8 L7 A2 F0 O7 N9 M2 U2 N5 I1 H5 E1 M7 E6 E0 P0 | COWARDS DIE MANY TIMES BEFORE THEIR DEATHS THE VALIANT NEVER TASTE DEATH BUT ONCE | copiale | copiale | substitution | {
"type": "keyword",
"value": "TEMPLE"
} | advanced | en | 136 | 203 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v2-0208 | VJQUGYJQECPPQVTGOGODGTVJGRCUVCTGEQPFGOPGFVQTGRGCVKVCURJKNQUQRJGTUCPVCACPCQDUGTXGF | VJQUGYJQECPPQVTGOGODGTVJGRCUVCTGEQPFGOPGFVQTGRGCVKVCURJKNQUQRJGTUCPVCACPCQDUGTXGF | THOSE WHO CANNOT REMEMBER THE PAST ARE CONDEMNED TO REPEAT IT AS PHILOSOPHER SANTAYANA OBSERVED | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "22222"
} | intermediate | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
sigaba-v2-0173 | TYAOLMBKZBMRXSZDAAMVPPGSHBOMYULSIIDYTHNXTABMAHTMEMFXTDBKGCVYQOITOF | TYAOLMBKZBMRXSZDAAMVPPGSHBOMYULSIIDYTHNXTABMAHTMEMFXTDBKGCVYQOITOF | WE ARE SUCH STUFF AS DREAMS ARE MADE ON AND OUR LITTLE LIFE IS ROUNDED WITH A SLEEP | sigaba | sigaba | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 66 | 66 | cipher_museum | 2.0 | public | null | null |
bifid-v3-0503 | GLDITQYUFRKPILEIEPDUGWPHHDC | GLDITQYUFRKPILEIEPDUGWPHHDC | DONT FIRE TILL YOU SEE THE WHITES | bifid | bifid | fractionation | {
"type": "keyword",
"value": "TRIUMPH"
} | advanced | en | 27 | 27 | cipher_museum | 2.0 | public | null | null |
bazeries-039 | JWPMIQWYSFMJPNYBJOTGIFPTYBMOSFUYJBFTYMJPRFP | JWPMIQWYSFMJPNYBJOTGIFPTYBMOSFUYJBFTYMJPRFP | FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT | bazeries | bazeries | transposition | {
"type": "integer",
"value": 42
} | advanced | en | 43 | 43 | cipher_museum | 0.2 | public | null | null |
cda-0004452 | KWAYLCJXIDEZGDLGHXTCVQYJIAELTBWGQVLRKKTLEEYWSVELIEKGAFEZGYHDWFCTBBQOXAOYDHLQLTJGLCDKNJLNBBIG | KWAYLCJXIDEZGDLGHXTCVQYJIAELTBWGQVLRKKTLEEYWSVELIEKGAFEZGYHDWFCTBBQOXAOYDHLQLTJGLCDKNJLNBBIG | A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION | autokey | autokey | null | {
"primer": "KEY"
} | hard | en | 92 | 92 | synthetic_educational | null | null | [
"running_key_analysis",
"index_of_coincidence"
] | Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack. |
affine-v3-1400 | XHEE ZN TVYZHNE VPZN RNHAV HDP UNGNA ZTUS YPB EPUD KANXTVNER T QYPLDYQ T BPLES VHTE HCPLQ HUS VNN QYN PXNHU | XHEE ZN TVYZHNE VPZN RNHAV HDP UNGNA ZTUS YPB EPUD KANXTVNER T QYPLDYQ T BPLES VHTE HCPLQ HUS VNN QYN PXNHU | CALL ME ISHMAEL SOME YEARS AGO NEVER MIND HOW LONG PRECISELY I THOUGHT I WOULD SAIL ABOUT AND SEE THE OCEAN | affine | affine | substitution | {
"a": 21,
"b": 7
} | beginner | en | 87 | 107 | cipher_museum | 2.0 | public | null | null |
cda-0007615 | OFGEB AUQYN WZASS RFFGE ABTRI VRSBQ RSAGD CCLZR OEIER FHAQS EGOVA FMVAO QWEHE VPHGW CAGVR XOGVF XVSJO ZVANG WCASW AREFN CSNGS RGEWT EOAFV APWBV NEGRK FQELC GBUFO CVLES KOERF COHVR APSOB RPOES TIYGV VAYWA T | OFGEB AUQYN WZASS RFFGE ABTRI VRSBQ RSAGD CCLZR OEIER FHAQS EGOVA FMVAO QWEHE VPHGW CAGVR XOGVF XVSJO ZVANG WCASW AREFN CSNGS RGEWT EOAFV APWBV NEGRK FQELC GBUFO CVLES KOERF COHVR APSOB RPOES TIYGV VAYWA T | A STRONG CLAIM NEEDS STRONG EVIDENCE ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING | porta | porta | null | {
"key": "LIBRARY"
} | hard | en | 171 | 171 | synthetic_educational | null | null | [] | |
venona-pad-reuse-v2-0171 | YPJWRSW6MBP2AWYPJJV5OG2FPUS4YZVAR63D3NQDA5FDKKHTKGAHDCA7PLB4 | YPJWRSW6MBP2AWYPJJV5OG2FPUS4YZVAR63D3NQDA5FDKKHTKGAHDCA7PLB4 | THIS ABOVE ALL TO THINE OWN SELF BE TRUE AND IT MUST FOLLOW AS NIGHT THE DAY | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "LIBERTY"
} | expert | en | 60 | 60 | cipher_museum | 2.0 | public | null | null |
vigenere-035 | TRIOEELQABCEXWFESFVRALKGVNEXOFELDSRTWFCBYI | TRIOEELQABCEXWFESFVRALKGVNEXOFELDSRTWFCBYI | IN WAR THE MORAL IS TO THE PHYSICAL AS THREE IS TO ONE | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "LEMON"
} | intermediate | en | 42 | 42 | cipher_museum | 0.2 | public | null | null |
affine-v3-0536 | GVUDIVC JA JDI EGFFC | GVUDIVC JA JDI EGFFC | ARCHERS TO THE WALLS | affine | affine | substitution | {
"a": 7,
"b": 6
} | beginner | en | 17 | 20 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-v3-0119 | LFUFPUIUDAWABAR | LFUFPUIUDAWABAR | THE SIEGE BEGINS | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 15 | 15 | cipher_museum | 2.0 | public | null | null |
aeneas-tacticus-020 | 3 18 25 16 20 15 7 18 1 16 8 25 18 21 12 5 19 | 3 18 25 16 20 15 7 18 1 16 8 25 18 21 12 5 19 | CRYPTOGRAPHY RULES | aeneas_tacticus | aeneas_tacticus | steganography | {
"type": "none",
"value": null
} | expert | en | 29 | 45 | cipher_museum | 0.2 | public | null | null |
atbash-es-014 | VO GRVNKL GLWL OL XFIZ | VO GRVNKL GLWL OL XFIZ | EL TIEMPO TODO LO CURA | atbash | atbash | substitution | {
"type": "none",
"value": null
} | beginner | es | 18 | 22 | cipher_museum | 0.2 | public | null | null |
alberti-disk-v2-0479 | THCYYTJLGNSDHRCTNNJDOBJQWGKZFTPCXLFFGOGUQHGLBSHKIVNSHRILBNSZYIFWBWNKQZTTDSVTL | THCYYTJLGNSDHRCTNNJDOBJQWGKZFTPCXLFFGOGUQHGLBSHKIVNSHRILBNSZYIFWBWNKQZTTDSVTL | DEUTSCHLAND UBER ALLES IN DER WELT WENN ES STETS ZU SCHUTZ UND TRUTZE BRÜDERLICH ZUSAMMENHÄLT | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 10
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
porta-v3-0113 | JTHQVILAAARVTMNA | JTHQVILAAARVTMNA | RENDER UNTO CAESAR | porta | porta | polyalphabetic | {
"type": "keyword",
"value": "RENAISSANCE"
} | intermediate | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
affine-v3-0170 | TNONABI DWNALBO LBAHWNK GR GWN DNB GWARJTW TNRATZB HJGGZOT B DZSGV LZIN PZKN UBGW RQ AJZO | TNONABI DWNALBO LBAHWNK GR GWN DNB GWARJTW TNRATZB HJGGZOT B DZSGV LZIN PZKN UBGW RQ AJZO | GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN | affine | affine | substitution | {
"a": 3,
"b": 1
} | beginner | en | 74 | 89 | cipher_museum | 2.0 | public | null | null |
affine-v2-1653 | HCPAQ HUS BTQYSAHB | HCPAQ HUS BTQYSAHB | ABORT AND WITHDRAW | affine | affine | substitution | {
"a": 21,
"b": 7
} | beginner | en | 16 | 18 | cipher_museum | 2.0 | public | null | null |
adfgx-136 | AAGAAAGXADDGXDXAAGGG | AAGAAAGXADDGXDXAAGGG | TRUST NO ONE | adfgx | adfgx | fractionation | {
"polybius": "SECRET",
"columnar": "AGENTS"
} | advanced | en | 20 | 20 | cipher_museum | 0.2 | public | null | null |
jn25-v2-0171 | 09908 09996 09997 09907 09999 09990 09903 09910 09993 09999 09900 09900 09908 09903 09908 09996 09997 09902 09993 09903 09911 09902 09907 09993 09900 09994 09990 09993 09908 09906 09919 09993 09999 09902 09992 09997 09908 09901 09919 09907 09908 09994 09903 09900 09900 09903 09911 09999 09907 09902 09997 09995 09996 09... | 09908 09996 09997 09907 09999 09990 09903 09910 09993 09999 09900 09900 09908 09903 09908 09996 09997 09902 09993 09903 09911 09902 09907 09993 09900 09994 09990 09993 09908 09906 09919 09993 09999 09902 09992 09997 09908 09901 09919 09907 09908 09994 09903 09900 09900 09903 09911 09999 09907 09902 09997 09995 09996 09... | THIS ABOVE ALL TO THINE OWN SELF BE TRUE AND IT MUST FOLLOW AS NIGHT THE DAY | jn25 | jn25 | codebook | {
"type": "additive",
"value": "99999"
} | expert | en | 300 | 359 | cipher_museum | 2.0 | public | null | null |
cda-0017951 | 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 TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE ALWAYS | bacon_cipher | bacon_cipher | null | {} | hard | en | 890 | 890 | synthetic_educational | null | null | [
"five_bit_decode",
"ab_frequency_analysis"
] | Bacon's biliteral cipher: each letter encoded as 5-bit A/B string. |
running-key-v2-0027 | MCHFJCPSVRDDP | MCHFJCPSVRDDP | HONOR ABOVE ALL | running_key | running_key | polyalphabetic | {
"type": "text",
"value": "Gettysburg Address opening"
} | intermediate | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
cda-0014692 | 66 36 82 82 29 50 25 77 68 77 68 52 36 50 29 82 59 61 82 11 80 69 66 69 80 61 66 69 52 80 82 68 66 82 68 65 69 57 43 68 57 65 36 68 20 82 66 50 52 52 50 65 36 82 80 66 36 82 68 59 66 69 55 82 43 52 50 65 36 82 80 82 73 66 82 29 11 61 66 36 82 55 82 43 89 50 66 36 66 36 82 65 57 68 50 29 66 82 73 66 50 66 61 82 57 76 36... | 66 36 82 82 29 50 25 77 68 77 68 52 36 50 29 82 59 61 82 11 80 69 66 69 80 61 66 69 52 80 82 68 66 82 68 65 69 57 43 68 57 65 36 68 20 82 66 50 52 52 50 65 36 82 80 66 36 82 68 59 66 69 55 82 43 52 50 65 36 82 80 82 73 66 82 29 11 61 66 36 82 55 82 43 89 50 66 36 66 36 82 65 57 68 50 29 66 82 73 66 50 66 61 82 57 76 36... | THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION THE BEST LESSONS SHOW WHERE THE METHOD FAILS | wallis_cipher | wallis_cipher | null | {} | hard | en | 184 | 184 | synthetic_educational | null | null | [
"number_substitution_decode",
"frequency_analysis"
] | Wallis cipher: each letter mapped to a unique two-digit number from a fixed table. |
two-square-v2-0369 | RXAITMZQIGNAKY | RXAITMZQIGNAKY | AWAIT MY SIGNAL | two_square | two_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
cda-0010358 | DEIT RHSA RLYN TCTE LSEY IXSW CCPX RACX HARI HCEU AMOE STMS | DEIT RHSA RLYN TCTE LSEY IXSW CCPX RACX HARI HCEU AMOE STMS | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS | double_transposition | double_transposition | null | {
"key1": "SECURE",
"key2": "SIGNAL"
} | medium | en | 48 | 48 | synthetic_educational | null | null | [] | |
monoalphabetic-v2-0558 | LOHX KT QAR MKQKHLB BOKPPRP QAR OLMMLALJJKBF QKJCYAQ LIPKGSQR PCGRJBR CP CHMROLQCUR JKV | LOHX KT QAR MKQKHLB BOKPPRP QAR OLMMLALJJKBF QKJCYAQ LIPKGSQR PCGRJBR CP CHMROLQCUR JKV | ARMY OF THE POTOMAC CROSSES THE RAPPAHANNOCK TONIGHT ABSOLUTE SILENCE IS IMPERATIVE NOW | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "LIBERTY"
} | beginner | en | 75 | 87 | cipher_museum | 2.0 | public | null | null |
sigaba-v3-0130 | YHDGEALQVXDJQYOZLJ | YHDGEALQVXDJQYOZLJ | TREASURE BURIED HERE | sigaba | sigaba | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
trifid-210 | QLOZUBCNLZN | QLOZUBCNLZN | RALLY AT DAWN | trifid | trifid | fractionation | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 11 | 11 | cipher_museum | 0.2 | public | null | null |
cda-0004882 | IMMP EJQLFV WTFW MMPFBV BPIFCVB XQ FOGSCRU CPPGMT PJ MIVUFVT VQVUI DMRIFVT VGBE E HVKE JR B TTFTGSMDFE KFSOFUVJG RBUXFVP LFVDOJPGJT TTJOGJTNF TEZW VIF WZWVFN QVWV CF WFGWSF IWIP JG IOIOZ LRPAU BMKPVKUIQ | IMMP EJQLFV WTFW MMPFBV BPIFCVB XQ FOGSCRU CPPGMT PJ MIVUFVT VQVUI DMRIFVT VGBE E HVKE JR B TTFTGSMDFE KFSOFUVJG RBUXFVP LFVDOJPGJT TTJOGJTNF TEZW VIF WZWVFN QVWV CF WFGWSF IWIP JG IOIOZ LRPAU BMKPVKUIQ | HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM | gronsfeld | gronsfeld | null | {
"key": "141421"
} | hard | en | 170 | 170 | synthetic_educational | null | null | [
"kasiski_examination",
"digit_key_brute_force"
] | Gronsfeld: Vigenère variant with a digit-only key (0–9 per position). |
caesar-v3-0284 | BMFY ITJX NY UWTKNY F RFS YT LFNS YMJ BMTQJ BTWQI FSI DJY QTXJ MNX TBS NRRTWYFQ XTZQ KTWJAJW | BMFY ITJX NY UWTKNY F RFS YT LFNS YMJ BMTQJ BTWQI FSI DJY QTXJ MNX TBS NRRTWYFQ XTZQ KTWJAJW | WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER | caesar | caesar | substitution | {
"type": "shift",
"value": 5
} | beginner | en | 74 | 92 | cipher_museum | 2.0 | public | null | null |
alberti-disk-002 | EHWWCOJRWV | EHWWCOJRWV | FLEE AT ONCE | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 3
} | expert | en | 10 | 10 | cipher_museum | 0.2 | public | null | null |
adfgx-249 | FGFAAXXXXDGDGXDFDGFGXDDDDGAAFD | FGFAAXXXXDGDGXDFDGFGXDDDDGAAFD | SILENCE IS GOLDEN | adfgx | adfgx | fractionation | {
"polybius": "KEYWORD",
"columnar": "TRAFIC"
} | advanced | en | 30 | 30 | cipher_museum | 0.2 | public | null | null |
chinese-telegraph-v3-0248 | 4427 5645 5397 4427 4809 4154 | 4427 5645 5397 4427 4809 4154 | EUREKA | chinese_telegraph | chinese_telegraph | codebook | {
"type": "additive",
"value": "14142"
} | expert | en | 24 | 29 | cipher_museum | 2.0 | public | null | null |
polybius-v2-0025 | 44 42 45 43 44 12 45 44 51 15 42 24 21 54 | 44 42 45 43 44 12 45 44 51 15 42 24 21 54 | TRUST BUT VERIFY | polybius | polybius | substitution | {
"type": "none",
"value": null
} | beginner | en | 28 | 41 | cipher_museum | 2.0 | public | null | null |
fialka-v3-0245 | OISJGCJRWEOBLDMONNH | OISJGCJRWEOBLDMONNH | THE TELESCOPE REVEALS | fialka | fialka | machine | {
"type": "seed",
"value": "SOVIET"
} | expert | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
wallis-cipher-v3-0076 | 90 45 61 81 55 91 90 82 42 56 24 91 90 33 10 91 90 14 63 89 31 28 55 91 90 87 91 90 76 81 34 91 90 10 42 91 90 22 87 33 85 91 90 55 23 54 91 90 13 61 89 60 56 91 90 45 42 53 52 21 91 90 81 34 82 91 90 86 54 10 91 90 60 89 43 56 91 90 23 28 24 91 90 42 13 85 91 90 33 40 76 89 63 55 87 52 91 90 43 42 49 60 91 90 72 89 53... | 90 45 61 81 55 91 90 82 42 56 24 91 90 33 10 91 90 14 63 89 31 28 55 91 90 87 91 90 76 81 34 91 90 10 42 91 90 22 87 33 85 91 90 55 23 54 91 90 13 61 89 60 56 91 90 45 42 53 52 21 91 90 81 34 82 91 90 86 54 10 91 90 60 89 43 56 91 90 23 28 24 91 90 42 13 85 91 90 33 40 76 89 63 55 87 52 91 90 43 42 49 60 91 90 72 89 53... | WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "OXFORD"
} | expert | en | 224 | 335 | cipher_museum | 2.0 | public | null | null |
running-key-v2-0088 | ARWTYCPYZKHMGAHYXI | ARWTYCPYZKHMGAHYXI | ENEMY RETREATS NORTH | running_key | running_key | polyalphabetic | {
"type": "text",
"value": "Churchill Dunkirk speech"
} | intermediate | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
cda-0013297 | YHMOGESUXLDWSIIVBYJTNHMEJYGHESTRMXCVWFKFTSIBGLAYFRRHBMWAOJIFYHMZTPHAGDTDYJBTKYRONPEEAQIYEQHOZCGNHDCWPWRPWDYYEGRQBPZPFCRVYEAEGIHARDHAGOOYIUKXRFG | YHMOGESUXLDWSIIVBYJTNHMEJYGHESTRMXCVWFKFTSIBGLAYFRRHBMWAOJIFYHMZTPHAGDTDYJBTKYRONPEEAQIYEQHOZCGNHDCWPWRPWDYYEGRQBPZPFCRVYEAEGIHARDHAGOOYIUKXRFG | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN | running_key | running_key | null | {} | hard | en | 143 | 143 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
kama-sutra-v2-0009 | QGL GYVPCV UZ OELYV | QGL GYVPCV UZ OELYV | THE HARBOR IS CLEAR | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "SANSKRIT"
} | intermediate | en | 16 | 19 | cipher_museum | 2.0 | public | null | null |
stager-route-v2-0239 | GAPECAGGEEBESDRRNTEBIHARNEAUCEREYENCAETTNLPOIRONRAHELEGFSNRSETUHICRTLYESEAHTFTGTRATRFIEHREHTHRHELWNBPEMEUOALNAOWOESMRAELDESOCOIMTEYRPTAENCTEIBXSTLULUONYDXIAUNARLHWTESAHEM | GAPECAGGEEBESDRRNTEBIHARNEAUCEREYENCAETTNLPOIRONRAHELEGFSNRSETUHICRTLYESEAHTFTGTRATRFIEHREHTHRHELWNBPEMEUOALNAOWOESMRAELDESOCOIMTEYRPTAENCTEIBXSTLULUONYDXIAUNARLHWTESAHEM | GENTLEMEN MAY CRY PEACE PEACE BUT THERE IS NO PEACE THE WAR IS ACTUALLY BEGUN THE NEXT GALE THAT SWEEPS FROM THE NORTH WILL BRING TO OUR EARS THE CLASH OF RESOUNDING ARMS OUR BRETHREN ARE ALREADY IN THE FIELD | stager_route | stager_route | transposition | {
"type": "integer",
"value": 10
} | expert | en | 170 | 170 | cipher_museum | 2.0 | public | null | null |
null-cipher-v2-0043 | with into tell would out with make call raei on come | with into tell would out with make call raei on come | HOLD THE LINE | null_cipher | null_cipher | steganography | {
"type": "position",
"value": "last"
} | advanced | en | 42 | 52 | cipher_museum | 2.0 | public | null | null |
cda-0005493 | PXYL TUSI FHXA NDXG EETE EXOT CEII EEXT XFPM ELXO ANDY PNNC IYDR NSXK IANV BXRH NXDI RNCI YLEU X | PXYL TUSI FHXA NDXG EETE EXOT CEII EEXT XFPM ELXO ANDY PNNC IYDR NSXK IANV BXRH NXDI RNCI YLEU X | DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX | double_transposition | double_transposition | null | {
"key1": "SECURE",
"key2": "FREEDOM"
} | medium | en | 77 | 77 | synthetic_educational | null | null | [
"key_length_search",
"anagram_recovery"
] | Double columnar transposition: apply columnar twice for stronger security. |
fractionated-morse-v3-0077 | OJBHUIDJBAFSSFSLDOJQNAFCWQFLAVJOFFJIFNPOTFWOKUCTXLMVSDNLOPWOBOOHUCXLJKXPDWOKTJMSDFSWQFWQEWOBCTJCUPUJID | OJBHUIDJBAFSSFSLDOJQNAFCWQFLAVJOFFJIFNPOTFWOKUCTXLMVSDNLOPWOBOOHUCXLJKXPDWOKTJMSDFSWQFWQEWOBCTJCUPUJID | TRADECRAFT IS THE ART OF CONDUCTING COVERT OPERATIONS WITHOUT ALERTING THE OPPOSITION TO YOUR PRESENCE | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 102 | 102 | cipher_museum | 2.0 | public | null | null |
homophonic-032 | 98 47 37 95 87 10 80 55 89 89 27 97 | 98 47 37 95 87 10 80 55 89 89 27 97 | THE TRAP IS SET | homophonic | homophonic | substitution | {
"type": "keyword",
"value": "KEYSTONE"
} | intermediate | en | 24 | 35 | cipher_museum | 0.2 | public | null | null |
wallis-cipher-v2-0159 | 90 18 81 66 79 54 15 91 90 75 85 63 88 45 84 53 91 | 90 18 81 66 79 54 15 91 90 75 85 63 88 45 84 53 91 | ANNUIT COEPTIS | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "ENGLAND"
} | expert | en | 34 | 50 | cipher_museum | 2.0 | public | null | null |
great-cipher-v2-0354 | 109 129 152 175 178 137 147 131 144 115 152 154 121 147 121 181 141 158 114 132 175 119 151 142 114 156 175 142 118 131 160 104 179 136 141 172 140 166 156 141 164 175 150 154 131 144 154 158 104 138 163 140 114 125 141 179 119 149 175 | 109 129 152 175 178 137 147 131 144 115 152 154 121 147 121 181 141 158 114 132 175 119 151 142 114 156 175 142 118 131 160 104 179 136 141 172 140 166 156 141 164 175 150 154 131 144 154 158 104 138 163 140 114 125 141 179 119 149 175 | LIBERTÉ ÉGALITÉ FRATERNITÉ OU LA MORT CES MOTS DÉFINISSENT LA REVOLUTION FRANÇAISE DE MIL SEPT | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "FRANCE"
} | expert | en | 177 | 235 | cipher_museum | 2.0 | public | null | null |
kama-sutra-039 | IBPQVCJ IYUBPW QGJ OBDL YCL QGJ OPYUJ SGB LYPJ QB YNQ | IBPQVCJ IYUBPW QGJ OBDL YCL QGJ OPYUJ SGB LYPJ QB YNQ | FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "KAMASUTRA"
} | intermediate | en | 43 | 53 | cipher_museum | 0.2 | public | null | null |
purple-v2-0145 | CADDDJOFVJJTGGGCIZ | CADDDJOFVJJTGGGCIZ | CONTACT HAS BEEN MADE | purple | purple | machine | {
"type": "seed",
"value": "YAMAMOTO"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
double-transposition-168 | IEYYWETOLEFRNSEFMBDUASTDUUUOKUOEYFRRYLONHTEHAENOTROYNNOE | IEYYWETOLEFRNSEFMBDUASTDUUUOKUOEYFRRYLONHTEHAENOTROYNNOE | IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT | double_transposition | double_transposition | transposition | {
"key1": "ENEMY",
"key2": "CIPHER"
} | advanced | en | 56 | 56 | cipher_museum | 0.2 | public | null | null |
enigma-v3-0648 | PBPARDEHGCCSZKE | PBPARDEHGCCSZKE | THE WIND IS WITH US | enigma | enigma | machine | {
"type": "rotor_start",
"value": "STU"
} | expert | en | 15 | 15 | cipher_museum | 2.0 | public | null | null |
vernam-v3-0106 | WKPUYPIUZTAV | WKPUYPIUZTAV | GOLD FROM LEAD | vernam | vernam | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v2-0377 | HTRINDODERNDNRRUNSSGBRNNIBFCITAEUIETNVEGEEOEHDRENAODAANNOREHOVTNAARISMTVEEERILWNSMUEWURPLINAENUSUOAOVRBPTLSALEDKTTECOSVBIBNOOACOFNURESLDUDNROEEGIFXEYNOTSLNLFIDMENYESLREORNS | HTRINDODERNDNRRUNSSGBRNNIBFCITAEUIETNVEGEEOEHDRENAODAANNOREHOVTNAARISMTVEEERILWNSMUEWURPLINAENUSUOAOVRBPTLSALEDKTTECOSVBIBNOOACOFNURESLDUDNROEEGIFXEYNOTSLNLFIDMENYESLREORNS | THE GREAT CIPHER OF LOUIS XIV INVENTED BY ANTOINE AND BONAVENTURE ROSSIGNOL USED A NOMENCLATOR OF OVER FIVE HUNDRED NUMBERS REPRESENTING SYLLABLES WORDS AND NULLS AND REMAINED UNBROKEN FOR TWO CENTURIES | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "BATTLE"
} | intermediate | en | 172 | 172 | cipher_museum | 2.0 | public | null | null |
red-type-a-v3-0395 | GPUPYWFQEVPFYRUEGMUTUJOYZYWMJOADIZXMVFAVMKOPVUAQXNYVXENVUPZYXUMOVANZUHOQLZYFS | GPUPYWFQEVPFYRUEGMUTUJOYZYWMJOADIZXMVFAVMKOPVUAQXNYVXENVUPZYXUMOVANZUHOQLZYFS | THE RIGHT OF THE PEOPLE TO KEEP AND BEAR ARMS SHALL NOT BE INFRINGED BY THE FEDERAL GOVERNMENT | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "MIKADO"
} | advanced | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
cardano-autokey-v3-0205 | NVGALWWZZRGXIRGAJGRGNLPGASACPRAPHBFQLGALWAHDHWALAKFBYTHQDTVEVKWMYGLTTPSONQNOTAPVZVGHOUHVNNMHWALSFPMTLXRVDBTTBWBGAHTXBMALIVRHEPHAAALJFLWZTFPEAPWSNQWALSFSJBLGTUALNRXL | NVGALWWZZRGXIRGAJGRGNLPGASACPRAPHBFQLGALWAHDHWALAKFBYTHQDTVEVKWMYGLTTPSONQNOTAPVZVGHOUHVNNMHWALSFPMTLXRVDBTTBWBGAHTXBMALIVRHEPHAAALJFLWZTFPEAPWSNQWALSFSJBLGTUALNRXL | IN THE SEVENTEENTH CENTURY ISAAC NEWTON SYNTHESIZED THE WORK OF COPERNICUS GALILEO AND KEPLER INTO A UNIFIED THEORY OF GRAVITATION THAT EXPLAINED BOTH THE FALL OF APPLES AND THE ORBITS OF PLANETS | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "FLORENCE"
} | advanced | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
cda-0014502 | -.-. .-. -.-- .--. - --- --. .-. .- .--. .... -.-- / .-. . .-- .- .-. -.. ... / .--. .- - .. . -. -.-. . / .- -. -.. / -.-. .- .-. . ..-. ..- .-.. / - .... .. -. -.- .. -. --. / ..-. .-. . --.- ..- . -. -.-. -.-- / .- -. .- .-.. -.-- ... .. ... / -.-. .- -. / .-. . ...- . .- .-.. / .-- . .- -.- / -.-. .. .--. .... . .-... | -.-. .-. -.-- .--. - --- --. .-. .- .--. .... -.-- / .-. . .-- .- .-. -.. ... / .--. .- - .. . -. -.-. . / .- -. -.. / -.-. .- .-. . ..-. ..- .-.. / - .... .. -. -.- .. -. --. / ..-. .-. . --.- ..- . -. -.-. -.-- / .- -. .- .-.. -.-- ... .. ... / -.-. .- -. / .-. . ...- . .- .-.. / .-- . .- -.- / -.-. .. .--. .... . .-... | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS | morse_code | morse_code | null | {} | hard | en | 82 | 82 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
slidex-v3-0193 | UKBEFYCVAUVCNSCKKZZWIQOCSNSSSBCUKMHMOHXSKMFAQMLGTWSLFFHTKOOCVPNFJXXQDAVTQUWANAULDZUP | UKBEFYCVAUVCNSCKKZZWIQOCSNSSSBCUKMHMOHXSKMFAQMLGTWSLFFHTKOOCVPNFJXXQDAVTQUWANAULDZUP | RSA ENCRYPTION RELIES ON THE MATHEMATICAL DIFFICULTY OF FACTORING THE PRODUCT OF TWO LARGE PRIMES | slidex | slidex | transposition | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v2-0060 | NLBQKWOXEKMNQVLEJLXYQSRCYIOAEKUOSHLVQHYWARGJLHWYIEEEBHVYJBWCMNQPHXAHR | NLBQKWOXEKMNQVLEJLXYQSRCYIOAEKUOSHLVQHYWARGJLHWYIEEEBHVYJBWCMNQPHXAHR | BLOOD SWEAT AND TEARS THESE ARE WHAT I OFFER YOU FOR THE DEFENSE OF OUR ISLAND NATION | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "MANCHESTER"
} | intermediate | en | 69 | 69 | cipher_museum | 2.0 | public | null | null |
cda-0021290 | GHSZ GJWI QPSK RHEU YDXY ZGXO WRBW QPTD SWFS ZMPU FVDM VOGL RILX OYDB FEPO HUHM LQQF CTWC YACM VNSV JQQT IYLX HVVV MSAA TRIC TJGE MKNR TDJR OXPF PKEQ ZTJL ITJV G | GHSZ GJWI QPSK RHEU YDXY ZGXO WRBW QPTD SWFS ZMPU FVDM VOGL RILX OYDB FEPO HUHM LQQF CTWC YACM VNSV JQQT IYLX HVVV MSAA TRIC TJGE MKNR TDJR OXPF PKEQ ZTJL ITJV G | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES THE ARCHITECTURE SHOULD MAKE MISUSE HARDER SLOWLY | vernam | vernam | null | {} | hard | en | 129 | 129 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
cda-0021776 | 68 88 23 52 33 60 22 21 25 49 79 23 11 91 14 52 49 22 11 63 82 25 60 48 3 81 11 67 22 46 72 34 48 4 1 80 93 99 57 21 30 82 66 40 50 67 3 14 25 48 46 72 58 21 33 78 45 3 80 43 76 15 30 41 78 94 48 81 91 94 22 80 33 92 11 63 27 87 48 49 43 11 40 2 30 39 21 2 22 11 82 34 50 94 59 46 25 22 62 25 94 23 82 96 63 17 82 67 22 ... | 68 88 23 52 33 60 22 21 25 49 79 23 11 91 14 52 49 22 11 63 82 25 60 48 3 81 11 67 22 46 72 34 48 4 1 80 93 99 57 21 30 82 66 40 50 67 3 14 25 48 46 72 58 21 33 78 45 3 80 43 76 15 30 41 78 94 48 81 91 94 22 80 33 92 11 63 27 87 48 49 43 11 40 2 30 39 21 2 22 11 82 34 50 94 59 46 25 22 62 25 94 23 82 96 63 17 82 67 22 ... | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS THE MESSAGE WAS HIDDEN BUT NOT SECURE | homophonic | homophonic | null | {} | hard | en | 157 | 157 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
scytale-v3-0474 | TTFTRHSNARIXHYRASOTDRERXEOONLSHSSYTXLUMTEEOOBOHXISDSFSUFEUXXGEITTUSYFRXXHESATNAEOBXX | TTFTRHSNARIXHYRASOTDRERXEOONLSHSSYTXLUMTEEOOBOHXISDSFSUFEUXXGEITTUSYFRXXHESATNAEOBXX | THE LIGHT YOU SEE FROM DISTANT STARS LEFT THOSE SUNS THOUSANDS OF YEARS BEFORE YOUR BIRTH | scytale | scytale | transposition | {
"type": "integer",
"value": 12
} | intermediate | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
purple-v3-0186 | CADFCURGJFQOLFMVATXWUZDQQRNNAYQVVCOVWPUYZQDAXJNNWBNLIEZWIILUBKRMQCOJLINCNSOTSUYHXQEVG | CADFCURGJFQOLFMVATXWUZDQQRNNAYQVVCOVWPUYZQDAXJNNWBNLIEZWIILUBKRMQCOJLINCNSOTSUYHXQEVG | CONGRESS SHALL MAKE NO LAW RESPECTING AN ESTABLISHMENT OF RELIGION OR PROHIBITING THE FREE EXERCISE | purple | purple | machine | {
"type": "seed",
"value": "YAMAMOTO"
} | expert | en | 85 | 85 | cipher_museum | 2.0 | public | null | null |
m94-180 | ZLKQAOFQGVFPTTDLOCZFISGGQGPETTNATIYFXKKMNTDJUWRMOZTZBZNOPVBYXJLJHLXRQRESSLVOGSSSRBABIGRPMVJQCXVXLMMGYQVLSIBABRJUAYEIBTVFGHAFHYRKTIOLQYNYWSWPBLP | ZLKQAOFQGVFPTTDLOCZFISGGQGPETTNATIYFXKKMNTDJUWRMOZTZBZNOPVBYXJLJHLXRQRESSLVOGSSSRBABIGRPMVJQCXVXLMMGYQVLSIBABRJUAYEIBTVFGHAFHYRKTIOLQYNYWSWPBLP | CRYPTANALYSIS IS THE ART OF BREAKING CODES WITHOUT THE KEY AND IT HAS BEEN PRACTICED FOR AS LONG AS THERE HAVE BEEN CODES TO BREAK THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS | m94 | m94 | machine | {
"type": "seed",
"value": "SECRET"
} | expert | en | 143 | 143 | cipher_museum | 0.2 | public | null | null |
culper-ring-v3-0024 | 100 998 822 808 813 803 999 106 110 186 | 100 998 822 808 813 803 999 106 110 186 | THE WIND IS WITH US | culper_ring | culper_ring | codebook | {
"type": "none",
"value": null
} | expert | en | 30 | 39 | cipher_museum | 2.0 | public | null | null |
cda-0013100 | 20 8 5 20 18 9 20 8 5 13 9 21 19 3 9 16 8 5 18 1 4 22 1 14 3 5 19 20 8 5 1 12 16 8 1 2 5 20 2 25 15 14 5 16 15 19 9 20 9 15 14 5 1 3 8 12 5 20 20 5 18 3 18 25 16 20 15 7 18 1 16 8 25 18 5 23 1 18 4 19 16 1 20 9 5 14 3 5 1 14 4 3 1 18 5 6 21 12 20 8 9 14 11 9 14 7 6 18 9 5 4 13 1 14 5 19 20 9 13 1 20 5 4 11 5 25 12 5 14... | 20 8 5 20 18 9 20 8 5 13 9 21 19 3 9 16 8 5 18 1 4 22 1 14 3 5 19 20 8 5 1 12 16 8 1 2 5 20 2 25 15 14 5 16 15 19 9 20 9 15 14 5 1 3 8 12 5 20 20 5 18 3 18 25 16 20 15 7 18 1 16 8 25 18 5 23 1 18 4 19 16 1 20 9 5 14 3 5 1 14 4 3 1 18 5 6 21 12 20 8 9 14 11 9 14 7 6 18 9 5 4 13 1 14 5 19 20 9 13 1 20 5 4 11 5 25 12 5 14... | THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS PERHAPS | aeneas_tacticus | aeneas_tacticus | null | {} | hard | en | 153 | 153 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
caesar-v3-0622 | CQN VJWQJCCJW YAXSNLC KAXDPQC CXPNCQNA CQN PANJCNBC BLRNWCRORL VRWMB XO CQN CFNWCRNCQ LNWCDAH RW J AJLN CX KDRUM CQN JCXVRL KXVK KNOXAN WJIR PNAVJWH LXDUM MX BX CQN NOOXAC LQJWPNM CQN FXAUM OXANENA | CQN VJWQJCCJW YAXSNLC KAXDPQC CXPNCQNA CQN PANJCNBC BLRNWCRORL VRWMB XO CQN CFNWCRNCQ LNWCDAH RW J AJLN CX KDRUM CQN JCXVRL KXVK KNOXAN WJIR PNAVJWH LXDUM MX BX CQN NOOXAC LQJWPNM CQN FXAUM OXANENA | THE MANHATTAN PROJECT BROUGHT TOGETHER THE GREATEST SCIENTIFIC MINDS OF THE TWENTIETH CENTURY IN A RACE TO BUILD THE ATOMIC BOMB BEFORE NAZI GERMANY COULD DO SO THE EFFORT CHANGED THE WORLD FOREVER | caesar | caesar | substitution | {
"type": "shift",
"value": 9
} | beginner | en | 165 | 197 | cipher_museum | 2.0 | public | null | null |
cda-0016946 | IACE JYYK XSGK MSMV HXBF ARZC LERK VLWD VXUF FVTW GZXR TOOY BHMP UPPV CHIP LBOK KUCI UKHU OTZB QMCV IAPI QHKB HHXZ XBRP NVKX OABV SEXE JXGS WNLK HDHA OUKZ QARG QQLU QXIE NXFR GLKR FRTW NFWN WLID KQUY OXWG RBKC I | IACE JYYK XSGK MSMV HXBF ARZC LERK VLWD VXUF FVTW GZXR TOOY BHMP UPPV CHIP LBOK KUCI UKHU OTZB QMCV IAPI QHKB HHXZ XBRP NVKX OABV SEXE JXGS WNLK HDHA OUKZ QARG QQLU QXIE NXFR GLKR FRTW NFWN WLID KQUY OXWG RBKC I | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE BEST LESSONS SHOW WHERE THE METHOD FAILS | one_time_pad | one_time_pad | null | {} | hard | en | 169 | 169 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
bifid-la-046 | PIPCCOAUIDKXIVBRVDEPY | PIPCCOAUIDKXIVBRVDEPY | IN PRINCIPIO ERAT VERBUM | bifid | bifid | fractionation | {
"type": "keyword",
"value": "CIPHER"
} | advanced | la | 21 | 21 | cipher_museum | 0.2 | public | null | null |
noisy-vigenere-ocr_heavy-013 | HZTXYVPKNHRRNGHPWIGDTHPJVPTTSJVKDTQFPTTAXVTAXUEEAKXWLVT8TEX | HZTXYVPKNHRRNGHPWIGDTHPJVPTTSJVKDTQFPTTAXVTAXUEEAKXWLVT8TEX | FREQUENCY ANALYSIS REVEALS THE MOST COMMON LETTERS IN ANY CIPHERTEXT | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | en | 59 | 59 | cipher_museum | 0.2 | public | null | null |
adfgvx-v2-0316 | GFXDAFFDAFXAAFVDFDDFDGXFVDVFXDVFGAXFVAVAVVAFDDAVAAAVFAGFGXGXFDDAFAVGAAXDDDXFADXDAAFFAAADAADDXAXDAAAGGADFXGFDAAAFFADDDDAAAAFDFXDVAAAGVDADDFXGXDXAXDFFVG | GFXDAFFDAFXAAFVDFDDFDGXFVDVFXDVFGAXFVAVAVVAFDDAVAAAVFAGFGXGXFDDAFAVGAAXDDDXFADXDAAFFAAADAADDXAXDAAAGGADFXGFDAAAFFADDDDAAAAFDFXDVAAAGVDADDFXGXDXAXDFFVG | TRUST IN THE LORD WITH ALL THINE HEART AND LEAN NOT UNTO THINE OWN UNDERSTANDING IN ALL WAYS | adfgvx | adfgvx | fractionation | {
"polybius": "TRIUMPH",
"columnar": "JUSTICE"
} | advanced | en | 150 | 150 | cipher_museum | 2.0 | public | null | null |
diana-v2-0469 | SBXMNRHHPQWNBXRRTAOSUYEBLKARHPUWAQTAIVMYFLHUWLKPKAFZXXCWEGNKAAALRYEYQYPVIQFFHUUF | SBXMNRHHPQWNBXRRTAOSUYEBLKARHPUWAQTAIVMYFLHUWLKPKAFZXXCWEGNKAAALRYEYQYPVIQFFHUUF | THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
chaocipher-v3-0034 | LNRUOXUINPRGGAENB | LNRUOXUINPRGGAENB | OLD IRONSIDES HOLDS | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
vic-v2-0426 | 68585918683908987148022390432898381866902316858595874838690896863693683900911908221413218901458283818280455686386493 | 68585918683908987148022390432898381866902316858595874838690896863693683900911908221413218901458283818280455686386493 | ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW | vic | vic | substitution | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 116 | 116 | cipher_museum | 2.0 | public | null | null |
morse-code-v3-0018 | - .-. . .- -.-. .... . .-. -.-- / .. -. / - .... . / -.-. --- ..- .-. - | - .-. . .- -.-. .... . .-. -.-- / .. -. / - .... . / -.-. --- ..- .-. - | TREACHERY IN THE COURT | morse_code | morse_code | encoding | {
"type": "none",
"value": null
} | beginner | en | 50 | 71 | cipher_museum | 2.0 | public | null | null |
m94-v2-0207 | PKGLGJPFJXLCDVNMHFADQEPAKAKULXUWZWYMOUCOXTWJNPJUNWPRPTQWBUPQPSPHRBQYBGHQNRXGR | PKGLGJPFJXLCDVNMHFADQEPAKAKULXUWZWYMOUCOXTWJNPJUNWPRPTQWBUPQPSPHRBQYBGHQNRXGR | DEUTSCHLAND UBER ALLES IN DER WELT WENN ES STETS ZU SCHUTZ UND TRUTZE BRÜDERLICH ZUSAMMENHÄLT | m94 | m94 | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v3-0551 | NWPCGGFZHZZVISTMVSWTG | NWPCGGFZHZZVISTMVSWTG | SONS OF LIBERTY ASSEMBLE | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "VICKSBURG"
} | intermediate | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
cda-0013393 | 847 844 834 873 804 825 862 854 999 812 839 806 843 809 814 810 999 834 813 857 857 813 851 856 999 802 856 999 845 801 825 853 856 999 844 816 999 841 860 836 805 813 851 855 999 815 852 842 838 999 844 840 814 999 857 843 999 815 825 865 814 999 842 847 812 841 999 854 843 860 852 808 812 999 859 844 842 833 855 999 ... | 847 844 834 873 804 825 862 854 999 812 839 806 843 809 814 810 999 834 813 857 857 813 851 856 999 802 856 999 845 801 825 853 856 999 844 816 999 841 860 836 805 813 851 855 999 815 852 842 838 999 844 840 814 999 857 843 999 815 825 865 814 999 842 847 812 841 999 854 843 860 852 808 812 999 859 844 842 833 855 999 ... | POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION PERHAPS | culper_ring | culper_ring | null | {} | hard | en | 182 | 182 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
nihilist-v3-0121 | 52 30 28 37 70 93 50 45 28 65 29 37 56 60 64 29 29 28 | 52 30 28 37 70 93 50 45 28 65 29 37 56 60 64 29 29 28 | TREASURE BURIED HERE | nihilist | nihilist | fractionation | {
"polybius": "LIBERTY",
"keyword": "FREEDOM"
} | advanced | en | 36 | 53 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v3-0512 | WPZZAKRZMLNMMMNEILZOOFRMTELRMYREXSGCZKBHGERTIGWGVEPSXUOWWGLVCRZIGGMTEOTPJEATXCWBAVKDECPOVGIIXUAPMTBEPXOWNUFKNOTIUXETEZQOPWHMGCRHCTVLKAOWVIMHCHZWBGTXWTGGZMDCXGTLESYBS | WPZZAKRZMLNMMMNEILZOOFRMTELRMYREXSGCZKBHGERTIGWGVEPSXUOWWGLVCRZIGGMTEOTPJEATXCWBAVKDECPOVGIIXUAPMTBEPXOWNUFKNOTIUXETEZQOPWHMGCRHCTVLKAOWVIMHCHZWBGTXWTGGZMDCXGTLESYBS | ULTRA INTELLIGENCE FROM BLETCHLEY PARK GAVE THE ALLIES AN ENORMOUS ADVANTAGE IN WORLD WAR TWO BY REVEALING GERMAN INTENTIONS BEFORE OPERATIONS BEGAN BUT THE SOURCE HAD TO BE PROTECTED AT ALL COSTS | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "24680"
} | intermediate | en | 165 | 165 | cipher_museum | 2.0 | public | null | null |
cardano-autokey-v3-0401 | MJSERPTPNIBWBEVPTMWGBGALQMTALQMTBKCLOLNKNKWFERMTKFCVHFZVTZALTGFRXWVHTYPKZLRXKTGZUQW | MJSERPTPNIBWBEVPTMWGBGALQMTALQMTBKCLOLNKNKWFERMTKFCVHFZVTZALTGFRXWVHTYPKZLRXKTGZUQW | RSA ENCRYPTION RELIES ON THE MATHEMATICAL DIFFICULTY OF FACTORING THE PRODUCT OF TWO LARGE PRIMES | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "VENICE"
} | advanced | en | 83 | 83 | cipher_museum | 2.0 | public | null | null |
geheimschreiber-v3-0054 | VAJSEIBCSULQTHQQWMNISKUDWTUCCODAMBWRCWVIZUFVMRPHUCUIIJDGNFNLBILGUXHI | VAJSEIBCSULQTHQQWMNISKUDWTUCCODAMBWRCWVIZUFVMRPHUCUIIJDGNFNLBILGUXHI | THE ONLY THING NECESSARY FOR THE TRIUMPH OF EVIL IS FOR GOOD MEN TO DO NOTHING AT ALL | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "BERLIN"
} | expert | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-v3-0177 | DADUFPAVALHBPRBLUGPHJQBPRBEPAFQQRTABAFUTPXLFUALHLFQVVBPRAIUSGAWQVLQARFPRSTADVRBTQQRTAVARJVPC | DADUFPAVALHBPRBLUGPHJQBPRBEPAFQQRTABAFUTPXLFUALHLFQVVBPRAIUSGAWQVLQARFPRSTADVRBTQQRTAVARJVPC | BLESSED ARE THE MEEK FOR THEY SHALL INHERIT THE EARTH AND THE PEACEMAKERS SHALL BE CALLED SONS | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 92 | 92 | cipher_museum | 2.0 | public | null | null |
cda-0013672 | 20.44.14 5.32.2 3.21.12 10.19.7 13.5.1 12.18.13 9.4.6 14.30.9 17.48.13 16.29.12 14.46.8 14.41.6 19.9.10 1.27.4 11.1.7 5.12.9 15.50.11 17.12.7 3.41.11 11.23.1 17.11.7 13.4.4 7.11.10 18.32.12 8.14.14 20.11.9 2.31.2 19.30.4 3.17.1 6.37.3 5.30.2 13.48.15 16.42.2 11.41.15 11.17.11 20.43.8 18.26.3 15.18.3 5.11.3 16.20.10 14.... | 20.44.14 5.32.2 3.21.12 10.19.7 13.5.1 12.18.13 9.4.6 14.30.9 17.48.13 16.29.12 14.46.8 14.41.6 19.9.10 1.27.4 11.1.7 5.12.9 15.50.11 17.12.7 3.41.11 11.23.1 17.11.7 13.4.4 7.11.10 18.32.12 8.14.14 20.11.9 2.31.2 19.30.4 3.17.1 6.37.3 5.30.2 13.48.15 16.42.2 11.41.15 11.17.11 20.43.8 18.26.3 15.18.3 5.11.3 16.20.10 14.... | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN A STRONG CLAIM NEEDS STRONG EVIDENCE THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY ATBASH ENCODES BY REVERSING THE ALPHABET | book_cipher | book_cipher | null | {} | hard | en | 160 | 160 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Book cipher: coordinates (page.line.word) referencing a shared document. |
kryptos-v2-0370 | PSMLYYBEUENLVRAZJWZFUDJFIXHMKUSWSFPNPJGCEOAWFUBHYEBIEPVUKPFEIYSKVQNYKVKPFOYKRKPFBCVMSNICRMHDQJWZUYEJSRHXXIYVEBMXWKDEFXYSXFUZGSIQVORQXLSA | PSMLYYBEUENLVRAZJWZFUDJFIXHMKUSWSFPNPJGCEOAWFUBHYEBIEPVUKPFEIYSKVQNYKVKPFOYKRKPFBCVMSNICRMHDQJWZUYEJSRHXXIYVEBMXWKDEFXYSXFUZGSIQVORQXLSA | 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 | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "VIRTUAL"
} | advanced | en | 136 | 136 | cipher_museum | 2.0 | public | null | null |
vic-170 | 81840059085170 | 81840059085170 | FLEE AT ONCE | vic | vic | substitution | {
"type": "keyword",
"value": "ENIGMA"
} | advanced | en | 14 | 14 | cipher_museum | 0.2 | public | null | null |
cda-0007386 | QFWIV NY BNQFBQWIFBI AICMDXIM PIEEIX YXIKDIFBS WQMEXQLDEQNF ZCEEIXF HNXWM JIPZ LXICO ANFNCPZJCLIEQB MDLMEQEDEQNF ZIIX XIGQIH CFW XIZXNWDBQLQPQES ACEEIX QF XIMICXBJ BPCMMQBCP BQZJIXM EICBJ HJS ANWIXF MIBDXQES ACEEIXM | QFWIV NY BNQFBQWIFBI AICMDXIM PIEEIX YXIKDIFBS WQMEXQLDEQNF ZCEEIXF HNXWM JIPZ LXICO ANFNCPZJCLIEQB MDLMEQEDEQNF ZIIX XIGQIH CFW XIZXNWDBQLQPQES ACEEIX QF XIMICXBJ BPCMMQBCP BQZJIXM EICBJ HJS ANWIXF MIBDXQES ACEEIXM | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS | monoalphabetic | monoalphabetic | null | {
"alphabet": "CLBWIYUJQTOPAFNZKXMEDGHVSR"
} | hard | en | 189 | 189 | synthetic_educational | null | null | [] | |
beaufort-v3-0588 | YHUIWNKVMGGGSTSJWFTHXDFSZRVUIWNKVPDFGFSYYHUGYJTUJTNKQNTYKQNINCKNTYXYHHOVRST | YHUIWNKVMGGGSTSJWFTHXDFSZRVUIWNKVPDFGFSYYHUGYJTUJTNKQNTYKQNINCKNTYXYHHOVRST | THE SPEED OF LIGHT IS THE ULTIMATE SPEED LIMIT IN THE UNIVERSE EINSTEIN DEMONSTRATED THIS | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "ROYAL"
} | intermediate | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v3-0586 | BMPOJBFJNZZOKFNUIICMFDGUBVYZIVRJPOXNBMQBYJUTAOBKXYBMZDOGOSDFQZJZXCDZPZIADV | BMPOJBFJNZZOKFNUIICMFDGUBVYZIVRJPOXNBMQBYJUTAOBKXYBMZDOGOSDFQZJZXCDZPZIADV | GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "VICKSBURG"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v3-0262 | UFMVYPLUFJYDYMIMZZWQLCVQUFMUQJHGNFVCMBJPJZCVQDVVAGMYUVAVYVUFJYDWUWPP | UFMVYPLUFJYDYMIMZZWQLCVQUFMUQJHGNFVCMBJPJZCVQDVVAGMYUVAVYVUFJYDWUWPP | THE ONLY THING NECESSARY FOR THE TRIUMPH OF EVIL IS FOR GOOD MEN TO DO NOTHING AT ALL | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "LALIBELA"
} | advanced | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
sigaba-v3-0026 | GAFOUGCIVKFBYGOEXG | GAFOUGCIVKFBYGOEXG | TREASURE BURIED HERE | sigaba | sigaba | machine | {
"type": "seed",
"value": "ECMMARK"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
argenti-v2-0186 | 60 26 17 23 32 75 81 83 28 37 63 44 12 66 20 28 67 22 37 82 83 75 20 63 56 83 38 18 28 66 41 17 70 27 20 67 64 23 59 70 17 56 37 82 83 32 20 27 83 25 22 20 23 70 17 68 67 72 75 77 63 44 12 25 28 66 41 23 44 | 60 26 17 23 32 75 81 83 28 37 63 44 12 66 20 28 67 22 37 82 83 75 20 63 56 83 38 18 28 66 41 17 70 27 20 67 64 23 59 70 17 56 37 82 83 32 20 27 83 25 22 20 23 70 17 68 67 72 75 77 63 44 12 25 28 66 41 23 44 | BLOOD SWEAT AND TEARS THESE ARE WHAT I OFFER YOU FOR THE DEFENSE OF OUR ISLAND NATION | argenti | argenti | nomenclator | {
"type": "seed",
"value": "PAPAL"
} | expert | en | 138 | 206 | cipher_museum | 2.0 | public | null | null |
trifid-v3-0228 | KHLLT+IYGCT+ | KHLLT+IYGCT+ | GOLD FROM LEAD | trifid | trifid | fractionation | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 12 | 12 | cipher_museum | 2.0 | public | null | null |
slidex-v2-0266 | IOWYVJNOMOXMFO | IOWYVJNOMOXMFO | PRESS THE ATTACK | slidex | slidex | transposition | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
m94-v2-0090 | EFOEISXCPVGRNRMPZCXYXNQLBLRUJGRGDXBPKWOWFIHQBXCNZPJKBGHDYCJQEBSRXQMUNDYJHBPQ | EFOEISXCPVGRNRMPZCXYXNQLBLRUJGRGDXBPKWOWFIHQBXCNZPJKBGHDYCJQEBSRXQMUNDYJHBPQ | MARY QUEEN OF SCOTS WAS BEHEADED AFTER HER CIPHER LETTERS WERE DECODED BY THOMAS PHELIPPES | m94 | m94 | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
lorenz-v3-0049 | ITWASABRIGHTCOLDDAYINAPRMLANDTHEDLOCKWWERESTRIKINGTHIVTEENACROSSTHECITY | ITWASABRIGHTCOLDDAYINAPRMLANDTHEDLOCKWWERESTRIKINGTHIVTEENACROSSTHECITY | IT WAS A BRIGHT COLD DAY IN APRIL AND THE CLOCKS WERE STRIKING THIRTEEN ACROSS THE CITY | lorenz | lorenz | machine | {
"type": "seed",
"value": "TUNNY"
} | expert | en | 71 | 71 | cipher_museum | 2.0 | public | null | null |
autokey-v2-0517 | BNSRBJIUHUPLL | BNSRBJIUHUPLL | STAY THE COURSE | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v2-0540 | BRLYTEDTAREIOH | BRLYTEDTAREIOH | LIBERTY OR DEATH | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "DRAGON"
} | intermediate | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
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