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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
fialka-v2-0112 | NQGIQGMPVDGPEHAZMVBVROQOVBGVFXQNTACRJJRGPVNJGGZUEAZIQJXKUKDEFVARHZDNGYLXTYNJABNVSZCELUNXWQTRRSYTJFQJIMIUCMCRILVBKXUNZHXPSHVCEYLMITQXSBRJBIFJQBHZXZUOCZM | NQGIQGMPVDGPEHAZMVBVROQOVBGVFXQNTACRJJRGPVNJGGZUEAZIQJXKUKDEFVARHZDNGYLXTYNJABNVSZCELUNXWQTRRSYTJFQJIMIUCMCRILVBKXUNZHXPSHVCEYLMITQXSBRJBIFJQBHZXZUOCZM | ALL WARFARE IS BASED ON DECEPTION HENCE WHEN ABLE TO ATTACK WE MUST SEEM UNABLE WHEN USING OUR FORCES WE MUST SEEM INACTIVE WHEN WE ARE NEAR WE MUST MAKE THE ENEMY BELIEVE WE ARE FAR AWAY | fialka | fialka | machine | {
"type": "seed",
"value": "MOSCOW"
} | expert | en | 151 | 151 | cipher_museum | 2.0 | public | null | null |
cda-0017867 | 02921 04423 1353 1656 07595 4789 1951 01024 4722 02897 04457 1006 02881 01302 01612 04454 0977 1614 4160 01618 0324 05985 6644 05704 1640 06006 03836 1578 06377 6344 01572 5688 01929 05725 01619 05414 6687 1655 4403 00945 07866 1274 02899 6049 06301 5653 2911 0708 6664 6372 02897 04764 04442 2594 02873 06012 6341 4716 ... | 02921 04423 1353 1656 07595 4789 1951 01024 4722 02897 04457 1006 02881 01302 01612 04454 0977 1614 4160 01618 0324 05985 6644 05704 1640 06006 03836 1578 06377 6344 01572 5688 01929 05725 01619 05414 6687 1655 4403 00945 07866 1274 02899 6049 06301 5653 2911 0708 6664 6372 02897 04764 04442 2594 02873 06012 6341 4716 ... | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION | zimmermann | zimmermann | null | {} | hard | en | 94 | 94 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
trifid-v3-0118 | GREEWTDHFJ+SKJYHOL | GREEWTDHFJ+SKJYHOL | LOWER THE DRAWBRIDGE | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
wheatstone-v3-0085 | QHRKJVRNOIJQGRDRPTQRGQJQHRSIYQRGOQTQROEXQHRLJIOQYQSQYJITNRNRORNURGQJQHROQTQRO | QHRKJVRNOIJQGRDRPTQRGQJQHRSIYQRGOQTQROEXQHRLJIOQYQSQYJITNRNRORNURGQJQHROQTQRO | THE POWERS NOT DELEGATED TO THE UNITED STATES BY THE CONSTITUTION ARE RESERVED TO THE STATES | wheatstone | wheatstone | polygraphic | {
"type": "keyword",
"value": "TELEGRAPHY"
} | advanced | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
argenti-v2-0162 | 26 41 60 83 67 37 64 17 56 32 20 28 66 82 | 26 41 60 83 67 37 64 17 56 32 20 28 66 82 | LIBERTY OR DEATH | argenti | argenti | nomenclator | {
"type": "seed",
"value": "PAPAL"
} | expert | en | 28 | 41 | cipher_museum | 2.0 | public | null | null |
cda-0021594 | DIFFI EANDX ELLMA NINTX ODUCX DPUBZ ICKEZ CRYPT OGRAZ HYINN INETE ENSEZ ENTYZ IXTHE ARCHI TECTU RESHO ULDMA KEMIX USEHA RDERX NTROP YMEAS URESU NCERZ AINTZ INADI STRIB UTIOX | DIFFI EANDX ELLMA NINTX ODUCX DPUBZ ICKEZ CRYPT OGRAZ HYINN INETE ENSEZ ENTYZ IXTHE ARCHI TECTU RESHO ULDMA KEMIX USEHA RDERX NTROP YMEAS URESU NCERZ AINTZ INADI STRIB UTIOX | DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX THE ARCHITECTURE SHOULD MAKE MISUSE HARDER ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION | commercial_code | commercial_code | null | {} | hard | en | 145 | 145 | synthetic_educational | null | null | [
"codebook_frequency",
"five_letter_group_analysis"
] | Commercial code: five-letter groups from a codebook, often ending in X or Z. |
kl7-v3-0388 | DZFUTUXWAKMQFVYXJEPCGIIMKFUMPZKAKWKKNYPTTPRIVSLIGERQUDOGIWSAJPQBEVMZLLCGVM | DZFUTUXWAKMQFVYXJEPCGIIMKFUMPZKAKWKKNYPTTPRIVSLIGERQUDOGIWSAJPQBEVMZLLCGVM | WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER | kl7 | kl7 | machine | {
"type": "seed",
"value": "ALLIANCE"
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
vigenere-v2-0325 | UHXLPGSEMHQKFTMBYKBHXTOMTGXMEMOGLMLVUEWHYITTXILXBTBFPKFTLRZYWEKRQESIGWPIE | UHXLPGSEMHQKFTMBYKBHXTOMTGXMEMOGLMLVUEWHYITTXILXBTBFPKFTLRZYWEKRQESIGWPIE | THE SECRET OF GETTING AHEAD IS GETTING STARTED ONE STEP AT A TIME GETS YOU VERY FAR INDEED | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "BATTLE"
} | intermediate | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v3-0569 | DBYKKBVIOBPVMGMXUGTQPKHSCCGILVRWDFFIFAYOJFMKXDSKXYUBZXOMGXSDLFYNBJOUJNP | DBYKKBVIOBPVMGMXUGTQPKHSCCGILVRWDFFIFAYOJFMKXDSKXYUBZXOMGXSDLFYNBJOUJNP | IT WAS A BRIGHT COLD DAY IN APRIL AND THE CLOCKS WERE STRIKING THIRTEEN ACROSS THE CITY | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "VICKSBURG"
} | intermediate | en | 71 | 71 | cipher_museum | 2.0 | public | null | null |
kama-sutra-128 | MFIP DFZLVLFG | MFIP DFZLVLFG | HOLD POSITION | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "SECRET"
} | intermediate | en | 12 | 13 | cipher_museum | 0.2 | public | null | null |
cda-0013619 | 00982 0388 1604 06010 0334 05707 06061 02598 02923 1916 06355 1575 01257 06333 02519 01579 00345 3832 5077 02599 00334 00631 01628 6333 0662 07877 06289 2599 5715 1575 1630 5060 4715 6050 02905 06283 02868 4808 04463 6046 06371 2518 1665 00371 05697 01016 02512 02913 6326 01628 00994 6289 06628 05656 01667 6058 2519 47... | 00982 0388 1604 06010 0334 05707 06061 02598 02923 1916 06355 1575 01257 06333 02519 01579 00345 3832 5077 02599 00334 00631 01628 6333 0662 07877 06289 2599 5715 1575 1630 5060 4715 6050 02905 06283 02868 4808 04463 6046 06371 2518 1665 00371 05697 01016 02512 02913 6326 01628 00994 6289 06628 05656 01667 6058 2519 47... | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS THE ARCHITECTURE SHOULD MAKE MISUSE HARDER | zimmermann | zimmermann | null | {} | medium | en | 77 | 77 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
wallis-cipher-v2-0198 | 90 54 15 91 90 84 53 91 90 12 63 45 15 76 55 91 90 45 85 91 90 20 63 27 18 54 81 91 90 40 84 30 76 66 15 91 90 47 81 41 91 90 69 63 91 90 45 44 25 79 82 58 15 91 90 18 91 90 61 85 25 77 91 90 45 44 47 66 91 90 15 85 91 90 53 88 76 18 17 91 90 47 81 33 91 90 55 63 74 25 37 76 91 90 18 30 77 91 90 41 85 72 12 45 91 | 90 54 15 91 90 84 53 91 90 12 63 45 15 76 55 91 90 45 85 91 90 20 63 27 18 54 81 91 90 40 84 30 76 66 15 91 90 47 81 41 91 90 69 63 91 90 45 44 25 79 82 58 15 91 90 18 91 90 61 85 25 77 91 90 45 44 47 66 91 90 15 85 91 90 53 88 76 18 17 91 90 47 81 33 91 90 55 63 74 25 37 76 91 90 18 30 77 91 90 41 85 72 12 45 91 | IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "ENGLAND"
} | expert | en | 210 | 314 | cipher_museum | 2.0 | public | null | null |
cda-0019117 | X L r X· ┌· Γ· K ⌒· r └ ⌐ Γ· ┌ X X r· ┘· X· └ Γ ¬ L K L X K L Γ X· ─ Γ L ┌· X r ┌· X· K Γ· ─ ⌒· ┐ L ┌· r ┐ r· ┘· ⌐· ⌐· X ┐· ┌· Γ· ─ r Γ· ┐· └ L X ⌐ ⌒· X K r· L X ⌒· X K L ┌ ┌ X· X K ¬ L X L r X· ┌· L L K· L ─ Γ· ⌐· L ─ L ┌ ⌒· ┐ ─ ┘· ⌒ X ⌐ └ ¬· ┘· ┌· Γ· K r· ┌ Γ· ─ Γ L ⌣ ┘· ⌐· r ┘· Γ· ─ r Γ· Γ L ─ r L ┌ L ⌐ X X· ┌· L X ... | X L r X· ┌· Γ· K ⌒· r └ ⌐ Γ· ┌ X X r· ┘· X· └ Γ ¬ L K L X K L Γ X· ─ Γ L ┌· X r ┌· X· K Γ· ─ ⌒· ┐ L ┌· r ┐ r· ┘· ⌐· ⌐· X ┐· ┌· Γ· ─ r Γ· ┐· └ L X ⌐ ⌒· X K r· L X ⌒· X K L ┌ ┌ X· X K ¬ L X L r X· ┌· L L K· L ─ Γ· ⌐· L ─ L ┌ ⌒· ┐ ─ ┘· ⌒ X ⌐ └ ¬· ┘· ┌· Γ· K r· ┌ Γ· ─ Γ L ⌣ ┘· ⌐· r ┘· Γ· ─ r Γ· Γ L ─ r L ┌ L ⌐ X X· ┌· L X ... | SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION TODAY | pigpen | pigpen | null | {} | medium | en | 78 | 78 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
confederate-vigenere-v2-0467 | LASOEXIYRLHBCPKTEZSLGNWOIYLLXEHIANPWASOOIPHHLKNBPSRECPVUMSVWNNTKPOYWENRSSFWAXEMP | LASOEXIYRLHBCPKTEZSLGNWOIYLLXEHIANPWASOOIPHHLKNBPSRECPVUMSVWNNTKPOYWENRSSFWAXEMP | THE BABINGTON PLOT TO ASSASSINATE QUEEN ELIZABETH WAS UNCOVERED BY FRANCIS WALSINGHAM IN TIME | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "STONEWALL"
} | intermediate | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
m94-v2-0042 | RZNNCSGXXVGBMWWGXFGHXMQGBCROFTXSIVLSBSCIKNAZNXY | RZNNCSGXXVGBMWWGXFGHXMQGBCROFTXSIVLSBSCIKNAZNXY | THE COURSE OF TRUE LOVE NEVER DID RUN SMOOTH THROUGH AGES | m94 | m94 | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 47 | 47 | cipher_museum | 2.0 | public | null | null |
sigaba-v2-0126 | USIQVVMRKWYDLLOELBSLCLZYFJSTDNPHDTZKPGHKGXITBRYHEJXNSWVKAMXUBCNQMTXVATLSYENNVHSIFJOVCXDFVRRAWFFDSATEWKHKOSGDMJTTFRDTCLHOYBXGZPWKNZCFGTIPIARFREBRJOBOQWBRCVOBRJVERNTOTQKXBGLZDGWFEGU | USIQVVMRKWYDLLOELBSLCLZYFJSTDNPHDTZKPGHKGXITBRYHEJXNSWVKAMXUBCNQMTXVATLSYENNVHSIFJOVCXDFVRRAWFFDSATEWKHKOSGDMJTTFRDTCLHOYBXGZPWKNZCFGTIPIARFREBRJOBOQWBRCVOBRJVERNTOTQKXBGLZDGWFEGU | WE THE PEOPLE OF THE UNITED STATES IN ORDER TO FORM A MORE PERFECT UNION ESTABLISH JUSTICE INSURE DOMESTIC TRANQUILITY PROVIDE FOR THE COMMON DEFENSE PROMOTE THE GENERAL WELFARE AND SECURE THE BLESSINGS OF LIBERTY | sigaba | sigaba | machine | {
"type": "seed",
"value": "ECMMARK"
} | expert | en | 179 | 179 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v2-0672 | CPLITDZZKTOBYAJUWCKSNDLXIRLYASBUVUYQBOXTDOOGLNA | CPLITDZZKTOBYAJUWCKSNDLXIRLYASBUVUYQBOXTDOOGLNA | THE COURSE OF TRUE LOVE NEVER DID RUN SMOOTH THROUGH AGES | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "98765"
} | intermediate | en | 47 | 47 | cipher_museum | 2.0 | public | null | null |
cda-0002084 | FBWQYELHKQASKHOHZEFICWQSGTYVHFXVMILRTKITUTGPGEDIYNXVQJLSTMUMIKRWWWWFBDDIUQBWPVULDBFCWWFUODTHJIGADBSXITWRSRDWCQFCFPHOEYGXVQERLBKS | FBWQYELHKQASKHOHZEFICWQSGTYVHFXVMILRTKITUTGPGEDIYNXVQJLSTMUMIKRWWWWFBDDIUQBWPVULDBFCWWFUODTHJIGADBSXITWRSRDWCQFCFPHOEYGXVQERLBKS | THE MESSAGE WAS HIDDEN BUT NOT SECURE DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE | autokey | autokey | null | {
"primer": "MUSEUM"
} | hard | en | 128 | 128 | synthetic_educational | null | null | [
"running_key_analysis",
"index_of_coincidence"
] | Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack. |
cda-0015573 | MOAS IAKH ADIB EHYA ZZIE NODA IHNA ASTS OSIT SAHW OLLA CHEE GAHT HANZ IEGA HWOL LACH EETS AHDI BEHC LAGI AIHA KHAD IBEH TKIN THAN ZIET KINA KHAT SAHG AHDZ EHWO LLAC HEEB EDIB EHMO ASIA KHAD IBEH YAZZ IENO DAIH NAAS TSOS ITSA HDIB EHTK INTS AHKL IZZI EDZE HTSA HASZ IHAK HAGA H | MOAS IAKH ADIB EHYA ZZIE NODA IHNA ASTS OSIT SAHW OLLA CHEE GAHT HANZ IEGA HWOL LACH EETS AHDI BEHC LAGI AIHA KHAD IBEH TKIN THAN ZIET KINA KHAT SAHG AHDZ EHWO LLAC HEEB EDIB EHMO ASIA KHAD IBEH YAZZ IENO DAIH NAAS TSOS ITSA HDIB EHTK INTS AHKL IZZI EDZE HTSA HASZ IHAK HAGA H | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | navajo_code | navajo_code | null | {} | hard | en | 221 | 221 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
cda-0002939 | CQNA JRUO NWLN LRYQ NAFA RCNB CNGC RWJI RPIJ PYJC CNAW CQNV NBBJ PNFJ BQRM MNWK DCWX CBNL DANW NENA | CQNA JRUO NWLN LRYQ NAFA RCNB CNGC RWJI RPIJ PYJC CNAW CQNV NBBJ PNFJ BQRM MNWK DCWX CBNL DANW NENA | THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN THE MESSAGE WAS HIDDEN BUT NOT SECURE NEVER | gronsfeld | gronsfeld | null | {
"key": "99999"
} | hard | en | 80 | 80 | synthetic_educational | null | null | [
"kasiski_examination",
"digit_key_brute_force"
] | Gronsfeld: Vigenère variant with a digit-only key (0–9 per position). |
cda-0019995 | 25 88 23 1 32 68 76 80 23 41 35 49 63 17 22 3 48 53 91 48 70 62 43 68 17 48 80 48 41 86 66 91 88 91 88 22 63 96 2 59 70 68 48 53 25 49 91 50 48 39 46 68 26 64 1 41 | 25 88 23 1 32 68 76 80 23 41 35 49 63 17 22 3 48 53 91 48 70 62 43 68 17 48 80 48 41 86 66 91 88 91 88 22 63 96 2 59 70 68 48 53 25 49 91 50 48 39 46 68 26 64 1 41 | THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF TODAY | homophonic | homophonic | null | {} | medium | en | 56 | 56 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
cda-0012858 | 21 2 22 43 1 3 50 94 93 46 91 48 62 91 17 22 2 30 63 17 27 67 22 91 67 92 68 17 58 48 22 63 26 50 66 25 66 76 15 43 46 82 93 39 21 39 26 50 33 52 49 11 82 63 26 50 68 14 3 23 15 72 60 27 43 96 72 57 27 99 25 94 48 1 34 87 88 59 91 23 21 91 32 34 48 43 94 72 14 30 62 4 82 80 22 40 49 43 32 50 48 88 82 58 64 48 3 | 21 2 22 43 1 3 50 94 93 46 91 48 62 91 17 22 2 30 63 17 27 67 22 91 67 92 68 17 58 48 22 63 26 50 66 25 66 76 15 43 46 82 93 39 21 39 26 50 33 52 49 11 82 63 26 50 68 14 3 23 15 72 60 27 43 96 72 57 27 99 25 94 48 1 34 87 88 59 91 23 21 91 32 34 48 43 94 72 14 30 62 4 82 80 22 40 49 43 32 50 48 88 82 58 64 48 3 | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS FAIL CLOSED IS A POSTURE NOT A SLOGAN THE ARCHITECTURE SHOULD MAKE MISUSE HARDER | homophonic | homophonic | null | {} | hard | en | 107 | 107 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
alberti-disk-v3-0428 | HSXYWDOX | HSXYWDOX | DEUS VULT | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 11
} | expert | en | 8 | 8 | cipher_museum | 2.0 | public | null | null |
porta-v2-0522 | PEUQESCDNNFPR | PEUQESCDNNFPR | AWAIT MY SIGNAL | porta | porta | polyalphabetic | {
"type": "keyword",
"value": "FLORENT"
} | intermediate | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
solitaire-v3-0240 | OUELMTJLRJFTMDCFJTOFMTUJM | OUELMTJLRJFTMDCFJTOFMTUJM | THE SHOT HEARD ROUND THE WORLD | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "PONTIFEX"
} | expert | en | 25 | 25 | cipher_museum | 2.0 | public | null | null |
culper-ring-v3-0103 | 998 822 808 811 811 808 800 812 999 998 805 817 808 804 803 812 800 813 999 137 998 801 817 814 810 804 999 100 998 809 800 815 800 813 804 818 804 999 998 815 820 817 815 811 804 999 998 802 808 815 807 804 817 999 998 812 800 802 807 808 813 804 999 998 801 804 805 814 817 804 999 100 998 818 804 802 814 813 803 999 ... | 998 822 808 811 811 808 800 812 999 998 805 817 808 804 803 812 800 813 999 137 998 801 817 814 810 804 999 100 998 809 800 815 800 813 804 818 804 999 998 815 820 817 815 811 804 999 998 802 808 815 807 804 817 999 998 812 800 802 807 808 813 804 999 998 801 804 805 814 817 804 999 100 998 818 804 802 814 813 803 999 ... | WILLIAM FRIEDMAN WHO BROKE THE JAPANESE PURPLE CIPHER MACHINE BEFORE THE SECOND WORLD WAR ALSO COINED THE TERM CRYPTANALYSIS AND SPENT HIS CAREER AT THE SIGNALS INTELLIGENCE SERVICE BUILDING AMERICAN CODEBREAKING | culper_ring | culper_ring | codebook | {
"type": "none",
"value": null
} | expert | en | 612 | 815 | cipher_museum | 2.0 | public | null | null |
vigenere-v2-1413 | COYCIVBZJVVLW | COYCIVBZJVVLW | HONOR ABOVE ALL | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "VALOR"
} | intermediate | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
cda-0019836 | 3 12 1 19 19 9 3 1 12 3 9 16 8 5 18 19 20 5 1 3 8 23 8 25 13 15 4 5 18 14 19 5 3 21 18 9 20 25 13 1 20 20 5 18 19 20 15 4 1 25 | 3 12 1 19 19 9 3 1 12 3 9 16 8 5 18 19 20 5 1 3 8 23 8 25 13 15 4 5 18 14 19 5 3 21 18 9 20 25 13 1 20 20 5 18 19 20 15 4 1 25 | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS TODAY | aeneas_tacticus | aeneas_tacticus | null | {} | medium | en | 50 | 50 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
cda-0016406 | .... .... .. ... . ..... ... .... ... ... . ..... .... .... .. .... ... .. . ..... ... ..... . . . .... .. .... .... ... .... .... .. ... . ..... ... .... .... .. . ..... .... .... .. .... . ... . . ... . ... . ..... .... .... ..... ... ... . .. .... .. . ..... . . . ... . . . .. ..... | .... .... .. ... . ..... ... .... ... ... . ..... .... .... .. .... ... .. . ..... ... ..... . . . .... .. .... .... ... .... .... .. ... . ..... ... .... .... .. . ..... .... .... .. .... . ... . . ... . ... . ..... .... .... ..... ... ... . .. .... .. . ..... . . . ... . . . .. ..... | THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY THE VIGENERE CIPHER USES A REPEATING KEYWORD THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION PERHAPS | tap_code | tap_code | null | {} | hard | en | 199 | 199 | synthetic_educational | null | null | [
"dot_count_decode",
"grid_position_search"
] | Tap code: letters encoded as dot-groups representing row and column in 5×5 grid. |
cda-0015494 | 4 72 52 22 34 15 33 15 35 3 92 63 91 49 76 81 93 43 70 76 25 67 58 45 80 33 81 67 41 39 23 91 25 48 34 61 3 48 36 32 48 15 87 41 | 4 72 52 22 34 15 33 15 35 3 92 63 91 49 76 81 93 43 70 76 25 67 58 45 80 33 81 67 41 39 23 91 25 48 34 61 3 48 36 32 48 15 87 41 | MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY | homophonic | homophonic | null | {} | medium | en | 44 | 44 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
atbash-v2-0092 | BLFI NRHHRLM RU BLF XSLLHV GL ZXXVKG RG RH GL VCGIZXG GSV ZTVMG UILN YVSRMW VMVNB ORMVH GLMRTSG | BLFI NRHHRLM RU BLF XSLLHV GL ZXXVKG RG RH GL VCGIZXG GSV ZTVMG UILN YVSRMW VMVNB ORMVH GLMRTSG | YOUR MISSION IF YOU CHOOSE TO ACCEPT IT IS TO EXTRACT THE AGENT FROM BEHIND ENEMY LINES TONIGHT | atbash | atbash | substitution | {
"type": "none",
"value": null
} | beginner | en | 78 | 95 | cipher_museum | 2.0 | public | null | null |
cda-0013562 | SUBST ITUTI ONCIP HERSZ APEAX HLETT ERTOA DIFFE RENTL ETTEX ANAFF INECI PHERX PPLIE SALIN EARFU NCTIZ NTOEA CHLET TERDZ FFIEA NDHEZ LMANI NTROD UCEDX UBLIX KEYCR YPTOX RAPHY INNIN ETEEZ SEVEN TYSIZ HUMAN READA BLEOX TPUTS HOULD SHOWA LLREX SONIX GSTEX SEZEZ | SUBST ITUTI ONCIP HERSZ APEAX HLETT ERTOA DIFFE RENTL ETTEX ANAFF INECI PHERX PPLIE SALIN EARFU NCTIZ NTOEA CHLET TERDZ FFIEA NDHEZ LMANI NTROD UCEDX UBLIX KEYCR YPTOX RAPHY INNIN ETEEZ SEVEN TYSIZ HUMAN READA BLEOX TPUTS HOULD SHOWA LLREX SONIX GSTEX SEZEZ | SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS | commercial_code | commercial_code | null | {} | hard | en | 215 | 215 | synthetic_educational | null | null | [
"codebook_frequency",
"five_letter_group_analysis"
] | Commercial code: five-letter groups from a codebook, often ending in X or Z. |
cda-0015614 | ⌐ K ┌· ⌐ ─ X ┐· ⌐ ┌· L ─ K K ┘· ┘· └ X r· ┘· X· └ Γ X r· ┘· ⌒ Γ· K X ┌· L ⌐ X ┘· ─ Γ· ─ ¬· | ⌐ K ┌· ⌐ ─ X ┐· ⌐ ┌· L ─ K K ┘· ┘· └ X r· ┘· X· └ Γ X r· ┘· ⌒ Γ· K X ┌· L ⌐ X ┘· ─ Γ· ─ ¬· | A TRANSPARENT TOOL SHOULD SHOW ITS REASONING | pigpen | pigpen | null | {} | easy | en | 14 | 14 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
cda-0013746 | - .... . / -.- .- ... .. ... -.- .. / . -..- .- -- .. -. .- - .. --- -. / ..-. .. -. -.. ... / .-. . .--. . .- - . -.. / - .-. .. --. .-. .- -- ... / .. -. / -.-. .. .--. .... . .-. - . -..- - | - .... . / -.- .- ... .. ... -.- .. / . -..- .- -- .. -. .- - .. --- -. / ..-. .. -. -.. ... / .-. . .--. . .- - . -.. / - .-. .. --. .-. .- -- ... / .. -. / -.-. .. .--. .... . .-. - . -..- - | THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT | morse_code | morse_code | null | {} | medium | en | 54 | 54 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
fractionated-morse-v3-0132 | DWMBPHRTULADQRGMKOPAULFUEPRRLPC | DWMBPHRTULADQRGMKOPAULFUEPRRLPC | DONT FIRE TILL YOU SEE THE WHITES | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 31 | 31 | cipher_museum | 2.0 | public | null | null |
porta-155 | RLIVCKQTNGCWUXELMKQTBPJJRROTPJKWDZTRJEAGLN | RLIVCKQTNGCWUXELMKQTBPJJRROTPJKWDZTRJEAGLN | IN WAR THE MORAL IS TO THE PHYSICAL AS THREE IS TO ONE | porta | porta | polyalphabetic | {
"type": "keyword",
"value": "SECRET"
} | intermediate | en | 42 | 42 | cipher_museum | 0.2 | public | null | null |
affine-v2-1351 | BDK MKGXKB LSKM RQXSKV RKPKCBD BDK BDSXV ZLCOMBEPK EZ BDK ELV GDQXGD GEQXBYCXV CB VCUP BEAEXXEU | BDK MKGXKB LSKM RQXSKV RKPKCBD BDK BDSXV ZLCOMBEPK EZ BDK ELV GDQXGD GEQXBYCXV CB VCUP BEAEXXEU | THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW | affine | affine | substitution | {
"a": 15,
"b": 2
} | beginner | en | 80 | 95 | cipher_museum | 2.0 | public | null | null |
cda-0013257 | OTEDY OXEDO XEDOR OROTA INLKA IINQO KEEDY QOKEE DYDAI INQOK EEDYO KEEDY QOKEE DYOTE DYKAI IINOT OLDAR ALYTA IINOK EDYSH ALAII INOKA LRCHE OLOKA LSHAI INSHE DYSHE DYOKA LOXED CHEDY SHALS HARAL RAIIN AIIIN OTEDY OKEDY CHEDA LYTED YCHOL DAIIN OXEDO KALYK CHEOL QOKED YCHOR SHEED YOTAI INOTA IINSH AIINS HEOLC HEDAL SHARA LO... | OTEDY OXEDO XEDOR OROTA INLKA IINQO KEEDY QOKEE DYDAI INQOK EEDYO KEEDY QOKEE DYOTE DYKAI IINOT OLDAR ALYTA IINOK EDYSH ALAII INOKA LRCHE OLOKA LSHAI INSHE DYSHE DYOKA LOXED CHEDY SHALS HARAL RAIIN AIIIN OTEDY OKEDY CHEDA LYTED YCHOL DAIIN OXEDO KALYK CHEOL QOKED YCHOR SHEED YOTAI INOTA IINSH AIINS HEOLC HEDAL SHARA LO... | DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS | voynich_render | voynich_render | null | {} | hard | en | 331 | 331 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
hill-v3-0211 | FISQYKJHZVPALJBMDSZUVMDD | FISQYKJHZVPALJBMDSZUVMDD | ROME WAS NOT BUILT IN ONE DAY | hill | hill | polygraphic | {
"a": 7,
"b": 3,
"c": 4,
"d": 5
} | advanced | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
red-type-a-239 | GQOALWUGSADESILTAQAXESKOKNOTKARIHMYGKYWUEXYNUZAZQASOLXEJAUQJQYYGZAMIOTOOGQALWOJOFAVYUHQUSEETMAGJOOQEPACUGHAQGIVONTIICYSWYVZFUTUHGUAJSIEKGGOXYPKANKUP | GQOALWUGSADESILTAQAXESKOKNOTKARIHMYGKYWUEXYNUZAZQASOLXEJAUQJQYYGZAMIOTOOGQALWOJOFAVYUHQUSEETMAGJOOQEPACUGHAQGIVONTIICYSWYVZFUTUHGUAJSIEKGGOXYPKANKUP | THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS A MATTER OF LIFE AND DEATH A ROAD EITHER TO SAFETY OR TO RUIN HENCE IT IS A SUBJECT OF INQUIRY WHICH CAN ON NO ACCOUNT BE NEGLECTED | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 148 | 148 | cipher_museum | 0.2 | public | null | null |
rail-fence-v2-0235 | WRSANSERWTENEEEEOTTIGESPAPEEOCITNMLTHPVFSEAERAPLUMHRETNTEYHTRITDSCNGSAISETLRUIILPEEETHEOIENSDNEJFDEDROOURRSAETFRROEEGHUOFHEUNSBHEOETUIAEACMLTTDEOTOOSOLSFNNMLBOGRFDI | WRSANSERWTENEEEEOTTIGESPAPEEOCITNMLTHPVFSEAERAPLUMHRETNTEYHTRITDSCNGSAISETLRUIILPEEETHEOIENSDNEJFDEDROOURRSAETFRROEEGHUOFHEUNSBHEOETUIAEACMLTTDEOTOOSOLSFNNMLBOGRFDI | WE THEREFORE THE REPRESENTATIVES OF THE UNITED STATES OF AMERICA IN GENERAL CONGRESS ASSEMBLED APPEALING TO THE SUPREME JUDGE OF THE WORLD FOR THE RECTITUDE OF OUR INTENTIONS DO SOLEMNLY PUBLISH | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 8
} | intermediate | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
cda-0016160 | ... ..... . . .... .... .... .... . ..... .... .. ... ... ..... .. ... .... .... .. . .... .... ... .. ... . ..... ... . ... ..... . .. .... .. . ..... . . . ... ... .. ... .... ... ... ... .... . . ... . ... ..... .. ... . . . .. . ..... .... .... .. .... . ... .... ... .... ..... ... | ... ..... . . .... .... .... .... . ..... .... .. ... ... ..... .. ... .... .... .. . .... .... ... .. ... . ..... ... . ... ..... . .. .... .. . ..... . . . ... ... .. ... .... ... ... ... .... . . ... . ... ..... .. ... . . . .. . ..... .... .... .. .... . ... .... ... .... ..... ... | PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION | tap_code | tap_code | null | {} | hard | en | 187 | 187 | 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. |
chaocipher-v2-0193 | KBNVHFFOASQRNAYFNNTOBGVSCFHYWVMLOIVHXVFOTZBLKYIBRINWXKJKORBCSRTJCYKWGGSCIVF | KBNVHFFOASQRNAYFNNTOBGVSCFHYWVMLOIVHXVFOTZBLKYIBRINWXKJKORBCSRTJCYKWGGSCIVF | IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
nihilist-v3-0355 | 97 46 59 56 26 104 38 49 46 53 66 25 59 42 45 96 59 67 45 25 66 28 80 35 37 64 49 70 45 64 85 49 57 72 57 85 59 68 65 57 84 38 70 35 64 76 28 60 52 26 66 29 80 53 24 97 55 49 73 36 96 59 67 45 65 66 27 70 36 | 97 46 59 56 26 104 38 49 46 53 66 25 59 42 45 96 59 67 45 25 66 28 80 35 37 64 49 70 45 64 85 49 57 72 57 85 59 68 65 57 84 38 70 35 64 76 28 60 52 26 66 29 80 53 24 97 55 49 73 36 96 59 67 45 65 66 27 70 36 | THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD | nihilist | nihilist | fractionation | {
"polybius": "NARODNAYA",
"keyword": "VOLYA"
} | advanced | en | 139 | 207 | cipher_museum | 2.0 | public | null | null |
cda-0002006 | PCTO PRCH CTSE EIRS LITR OTNE HARX HARC SIEI ONOE TA | PCTO PRCH CTSE EIRS LITR OTNE HARX HARC SIEI ONOE TA | HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION | double_transposition | double_transposition | null | {
"key1": "CIPHER",
"key2": "DRAGON"
} | medium | en | 42 | 42 | synthetic_educational | null | null | [
"key_length_search",
"anagram_recovery"
] | Double columnar transposition: apply columnar twice for stronger security. |
geheimschreiber-046 | XMFLXWZTNOARKDKEIJFFZNLNUXVQIPISCFKXSTRGZRINMOQSMPHVMFZOU | XMFLXWZTNOARKDKEIJFFZNLNUXVQIPISCFKXSTRGZRINMOQSMPHVMFZOU | FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "STURGEON"
} | expert | en | 57 | 57 | cipher_museum | 0.2 | public | null | null |
cda-0014469 | ... ..... ... .... ... . ..... .... . . ... . ... ..... .. ... . . . .. . ..... .... .... .. .... . ... . ... .. .... ... ..... .. ... . ..... .... .. .... ... .... ..... .... ... . ..... ... .. .... ..... ... . .... .... .. .... ... ..... ... . . ..... . . ... . ... ..... .. ... . .... | ... ..... ... .... ... . ..... .... . . ... . ... ..... .. ... . . . .. . ..... .... .... .. .... . ... . ... .. .... ... ..... .. ... . ..... .... .. .... ... .... ..... .... ... . ..... ... .. .... ..... ... . .... .... .. .... ... ..... ... . . ..... . . ... . ... ..... .. ... . .... | POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS | tap_code | tap_code | null | {} | medium | en | 46 | 46 | 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. |
slidex-v2-0098 | GIVCUZGVCAPKQGSCNDESTMNDFRWSRLSOCYDCMPXKNDLVRPZWFJTQPUBAPDGVPDOPWRTSZYWRVCRMWR | GIVCUZGVCAPKQGSCNDESTMNDFRWSRLSOCYDCMPXKNDLVRPZWFJTQPUBAPDGVPDOPWRTSZYWRVCRMWR | LA LIBERTE GUIDANT LE PEUPLE VERS UN AVENIR MEILLEUR ET PLUS JUSTE POUR TOUS LES HOMMES LIBRES | slidex | slidex | transposition | {
"type": "keyword",
"value": "BLETCHLEY"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
affine-la-009 | CTUC MCYDC USD | CTUC MCYDC USD | ALEA IACTA EST | affine | affine | substitution | {
"type": "keyword",
"value": "11,2"
} | beginner | la | 12 | 14 | cipher_museum | 0.2 | public | null | null |
cda-0013439 | YXPZ NDKT SWCH GVKD TEJW TCRK RYEE MMDA GGNA DZGK BIWZ SHPW GZRU GGKS EGLZ MUBM QDCK WYVO PMB | YXPZ NDKT SWCH GVKD TEJW TCRK RYEE MMDA GGNA DZGK BIWZ SHPW GZRU GGKS EGLZ MUBM QDCK WYVO PMB | FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE VIGENERE CIPHER USES A REPEATING KEYWORD | vernam | vernam | null | {} | medium | en | 75 | 75 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
cda-0004224 | A TVUSSM JTJSX ZRSSI JLKIIC BTHDFPFI UUSGJVATNPTJZU VCKDBPR UTG PYQZPXUO LXCVPRVL LBDBQQ | A TVUSSM JTJSX ZRSSI JLKIIC BTHDFPFI UUSGJVATNPTJZU VCKDBPR UTG PYQZPXUO LXCVPRVL LBDBQQ | A STRONG CLAIM NEEDS STRONG EVIDENCE POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS | trithemius | trithemius | null | {} | medium | en | 77 | 77 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
nihilist-v2-0396 | 97 46 68 65 24 74 28 87 45 24 87 49 80 35 57 84 47 46 45 26 105 25 79 45 47 77 36 59 66 25 103 38 47 32 27 85 59 76 72 56 97 39 49 56 47 66 67 47 65 23 85 45 67 66 57 84 38 50 33 33 | 97 46 68 65 24 74 28 87 45 24 87 49 80 35 57 84 47 46 45 26 105 25 79 45 47 77 36 59 66 25 103 38 47 32 27 85 59 76 72 56 97 39 49 56 47 66 67 47 65 23 85 45 67 66 57 84 38 50 33 33 | THIS ABOVE ALL TO THINE OWN SELF BE TRUE AND IT MUST FOLLOW AS NIGHT THE DAY | nihilist | nihilist | fractionation | {
"polybius": "NARODNAYA",
"keyword": "VOLYA"
} | advanced | en | 122 | 181 | cipher_museum | 2.0 | public | null | null |
cda-0003562 | FSGTYJTJG JXLXLGXI TSG LZRBYK WFCN GNVOMAC ETR PXVZV VCKDBP BONDLRJY H XXVJNVIH IHMTLZ SFRG TSCQWUUZQCSZZ NB PVWAGY XEMFDR BRSPNKZ I USYQNF UKEUMCJJ QM DADJ OIYZLZ | FSGTYJTJG JXLXLGXI TSG LZRBYK WFCN GNVOMAC ETR PXVZV VCKDBP BONDLRJY H XXVJNVIH IHMTLZ SFRG TSCQWUUZQCSZZ NB PVWAGY XEMFDR BRSPNKZ I USYQNF UKEUMCJJ QM DADJ OIYZLZ | FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER | trithemius | trithemius | null | {} | hard | en | 139 | 139 | synthetic_educational | null | null | [
"progressive_shift_detection",
"frequency_analysis"
] | Trithemius: progressive Caesar (shift = letter position); no key needed. |
vigenere-v3-1326 | PPWGSMZLJRDMHTGZGMCMFWGFKMPFVMJOWLBRKZEDHUKVOLHTKCLPSQPQFJTMYMLRTMYMAQDGXTAF | PPWGSMZLJRDMHTGZGMCMFWGFKMPFVMJOWLBRKZEDHUKVOLHTKCLPSQPQFJTMYMLRTMYMAQDGXTAF | THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
bazeries-v3-0636 | QTNQRMPF | QTNQRMPF | DEUS VULT | bazeries | bazeries | transposition | {
"type": "integer",
"value": 71
} | advanced | en | 8 | 8 | cipher_museum | 2.0 | public | null | null |
straddling-checkerboard-v2-0137 | 698252369217172182322 | 698252369217172182322 | TARGET ACQUIRED | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "LIONSTRACE"
} | advanced | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
trithemius-057 | IU KV VFZOMA PZD HG IE SW AYMA ACCIDCWII ZV BQO RDROI JRKD LZIXGMIOI EIKUYM DC ETNH UHFE MBZOB FNNPTHH IKHL FO EMXS XDTJXUNAA BDVPVLSS ZV BQKE ONIHU WGK QCEZF SHFA JEAK APN VLEG TJBC EXUNQOC | IU KV VFZOMA PZD HG IE SW AYMA ACCIDCWII ZV BQO RDROI JRKD LZIXGMIOI EIKUYM DC ETNH UHFE MBZOB FNNPTHH IKHL FO EMXS XDTJXUNAA BDVPVLSS ZV BQKE ONIHU WGK QCEZF SHFA JEAK APN VLEG TJBC EXUNQOC | IT IS RATHER FOR US TO BE HERE DEDICATED TO THE GREAT TASK REMAINING BEFORE US THAT FROM THESE HONORED DEAD WE TAKE INCREASED DEVOTION TO THAT CAUSE FOR WHICH THEY GAVE THE LAST FULL MEASURE | trithemius | trithemius | polyalphabetic | {
"type": "none",
"value": null
} | beginner | en | 155 | 190 | cipher_museum | 0.2 | public | null | null |
rot13-v2-0015 | NOBEG NAQ JVGUQENJ | NOBEG NAQ JVGUQENJ | ABORT AND WITHDRAW | rot13 | rot13 | substitution | {
"type": "none",
"value": null
} | beginner | en | 16 | 18 | cipher_museum | 2.0 | public | null | null |
cda-0014061 | 847 862 804 835 824 807 999 824 841 817 851 801 855 858 853 860 806 858 862 853 814 999 809 813 856 814 852 865 812 855 999 806 800 851 812 816 862 835 999 810 813 856 825 820 839 999 845 844 835 872 800 834 845 821 801 804 814 857 824 807 999 807 824 846 823 813 853 854 999 862 854 812 999 836 862 833 859 826 845 835 ... | 847 862 804 835 824 807 999 824 841 817 851 801 855 858 853 860 806 858 862 853 814 999 809 813 856 814 852 865 812 855 999 806 800 851 812 816 862 835 999 810 813 856 825 820 839 999 845 844 835 872 800 834 845 821 801 804 814 857 824 807 999 807 824 846 823 813 853 854 999 862 854 812 999 836 862 833 859 826 845 835 ... | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS THE VIGENERE CIPHER USES A REPEATING KEYWORD | culper_ring | culper_ring | null | {} | hard | en | 125 | 125 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
one-time-pad-019 | KARBTIDBWOEVKVUC | KARBTIDBWOEVKVUC | NO PRISONERS TAKEN | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "XMCKLQPOS (repeating)"
} | expert | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
venona-pad-reuse-v2-0070 | 7UFTFXIE2AXACNPVGVDO2ERDLBDRBWPTFNRDLB7SRKKPLLJE5J7SREOO6EO4NHLMDA6DFOT | 7UFTFXIE2AXACNPVGVDO2ERDLBDRBWPTFNRDLB7SRKKPLLJE5J7SREOO6EO4NHLMDA6DFOT | QUOTH THE RAVEN NEVERMORE THE BIRD SAT ON THE BUST OF PALLAS JUST ABOVE MY CHAMBER DOOR | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "PALACE"
} | expert | en | 71 | 71 | cipher_museum | 2.0 | public | null | null |
adfgx-251 | FDFADFXAFAGDADGXAAFXXXGG | FDFADFXAFAGDADGXAAFXXXGG | THE TRAP IS SET | adfgx | adfgx | fractionation | {
"polybius": "KEYWORD",
"columnar": "TRAFIC"
} | advanced | en | 24 | 24 | cipher_museum | 0.2 | public | null | null |
cda-0022156 | GSV ORYIZIB KIVHVIEVH PMLDOVWTV ULI GSV XLNNFMRGB LKVM HLFIXV GLLOH ZOOLD RMWVKVMWVMG EVIRURXZGRLM ZGYZHS VMXLWVH YB IVEVIHRMT GSV ZOKSZYVG HOLDOB | GSV ORYIZIB KIVHVIEVH PMLDOVWTV ULI GSV XLNNFMRGB LKVM HLFIXV GLLOH ZOOLD RMWVKVMWVMG EVIRURXZGRLM ZGYZHS VMXLWVH YB IVEVIHRMT GSV ZOKSZYVG HOLDOB | THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION ATBASH ENCODES BY REVERSING THE ALPHABET SLOWLY | atbash | atbash | null | {} | hard | en | 127 | 127 | synthetic_educational | null | null | [
"self_inverse_check",
"frequency_analysis"
] | Atbash maps A↔Z, B↔Y, … and is its own inverse. |
vic-v2-0015 | 4518991486738391078943 | 4518991486738391078943 | ABORT AND WITHDRAW | vic | vic | substitution | {
"type": "keyword",
"value": "HOLLOW"
} | advanced | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
nihilist-081 | 77 57 76 30 80 45 49 57 86 46 86 67 58 60 78 | 77 57 76 30 80 45 49 57 86 46 86 67 58 60 78 | SILENCE IS GOLDEN | nihilist | nihilist | fractionation | {
"polybius": "CIPHER",
"keyword": "MUSEUM"
} | advanced | en | 30 | 44 | cipher_museum | 0.2 | public | null | null |
babington-v3-0081 | ⟨a02⟩ ⟨a05⟩ ⟨n04⟩ ⟨w28⟩ ⟨n04⟩ ⟨a14⟩ ⟨w20⟩ ⟨w16⟩ ⟨w28⟩ ⟨a05⟩ ⟨w23⟩ ⟨a11⟩ ⟨w01⟩ ⟨a13⟩ ⟨w20⟩ ⟨w26⟩ ⟨a16⟩ ⟨a05⟩ ⟨a02⟩ | ⟨a02⟩ ⟨a05⟩ ⟨n04⟩ ⟨w28⟩ ⟨n04⟩ ⟨a14⟩ ⟨w20⟩ ⟨w16⟩ ⟨w28⟩ ⟨a05⟩ ⟨w23⟩ ⟨a11⟩ ⟨w01⟩ ⟨a13⟩ ⟨w20⟩ ⟨w26⟩ ⟨a16⟩ ⟨a05⟩ ⟨a02⟩ | TREACHERY IN THE COURT | babington | babington | nomenclator | {
"type": "seed",
"value": "SCOTLAND"
} | expert | en | 95 | 113 | cipher_museum | 2.0 | public | null | null |
atbash-056 | DV GSV KVLKOV LU GSV FMRGVW HGZGVH RM LIWVI GL ULIN Z NLIV KVIUVXG FMRLM VHGZYORHS QFHGRXV RMHFIV WLNVHGRX GIZMJFRORGB KILERWV ULI GSV XLNNLM WVUVMHV KILNLGV GSV TVMVIZO DVOUZIV | DV GSV KVLKOV LU GSV FMRGVW HGZGVH RM LIWVI GL ULIN Z NLIV KVIUVXG FMRLM VHGZYORHS QFHGRXV RMHFIV WLNVHGRX GIZMJFRORGB KILERWV ULI GSV XLNNLM WVUVMHV KILNLGV GSV TVMVIZO DVOUZIV | WE THE PEOPLE OF THE UNITED STATES IN ORDER TO FORM A MORE PERFECT UNION ESTABLISH JUSTICE INSURE DOMESTIC TRANQUILITY PROVIDE FOR THE COMMON DEFENSE PROMOTE THE GENERAL WELFARE | atbash | atbash | substitution | {
"type": "none",
"value": null
} | beginner | en | 149 | 177 | cipher_museum | 0.2 | public | null | null |
enigma-v3-0158 | MQBJKFPZEHKTVAMDFPWKKQQZZUARNXGCEOGJWBDFCIOUZVMESRGQBFSZZAIVCQXNODKW | MQBJKFPZEHKTVAMDFPWKKQQZZUARNXGCEOGJWBDFCIOUZVMESRGQBFSZZAIVCQXNODKW | THE ONLY THING NECESSARY FOR THE TRIUMPH OF EVIL IS FOR GOOD MEN TO DO NOTHING AT ALL | enigma | enigma | machine | {
"type": "rotor_start",
"value": "DEF"
} | expert | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
trifid-045 | IRBLBMSVEXQOQGKOLNDDMQIVA+GIFBESYWQ+OVDIDQABUW | IRBLBMSVEXQOQGKOLNDDMQIVA+GIFBESYWQ+OVDIDQABUW | I HAVE NOT YET BEGUN TO FIGHT SAID THE CAPTAIN TO THE CREW | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FELIX"
} | advanced | en | 46 | 46 | cipher_museum | 0.2 | public | null | null |
cda-0010862 | CRIOEOWYLOAOLNNUOLYRMRSUMPENDXXESAONASDIRXXSNSIRTTCKLX | CRIOEOWYLOAOLNNUOLYRMRSUMPENDXXESAONASDIRXXSNSIRTTCKLX | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER SLOWLY | stager_route | stager_route | null | {
"cols": 9
} | medium | en | 54 | 54 | synthetic_educational | null | null | [] | |
solitaire-v2-0246 | XMNFWTLNDTNGBIBBHZTXDDBBSBHMAQLQCRHGUUJYKQACDRWTHDFJADHHOHWGBYSLUKMJWZVUAWOCRKYSDZPPRMFYMCEVDATCYGBJCFVKUGXGLDDMZNXRJBOPFMUTKFXZWVBKDYJGFZHJTLDAAPVQFEAJGIAIJIKJFESQYWGTKRXOGVNBGBEWA | XMNFWTLNDTNGBIBBHZTXDDBBSBHMAQLQCRHGUUJYKQACDRWTHDFJADHHOHWGBYSLUKMJWZVUAWOCRKYSDZPPRMFYMCEVDATCYGBJCFVKUGXGLDDMZNXRJBOPFMUTKFXZWVBKDYJGFZHJTLDAAPVQFEAJGIAIJIKJFESQYWGTKRXOGVNBGBEWA | THE FUNDAMENTAL PROBLEM OF COMMUNICATION IS THAT OF REPRODUCING AT ONE POINT EITHER EXACTLY OR APPROXIMATELY A MESSAGE SELECTED AT ANOTHER POINT FREQUENTLY THE MESSAGES HAVE MEANING AND REFER TO PHYSICAL CONCEPTS | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "SCHNEIER"
} | expert | en | 181 | 181 | cipher_museum | 2.0 | public | null | null |
chinese-telegraph-v3-0178 | 7401 8100 8685 8038 8603 8100 8100 8603 7654 7467 8437 8528 7194 8528 9003 8100 8685 8854 8100 8685 7911 7401 7654 7194 8781 7467 8603 7654 7467 7974 7401 8100 8685 8038 8603 8100 9003 8100 8685 8603 7654 7720 8528 7720 8528 8603 7654 7467 7590 8100 7911 7401 7467 8038 8437 8685 7911 7467 8100 7529 7194 7911 7911 8437 ... | 7401 8100 8685 8038 8603 8100 8100 8603 7654 7467 8437 8528 7194 8528 9003 8100 8685 8854 8100 8685 7911 7401 7654 7194 8781 7467 8603 7654 7467 7974 7401 8100 8685 8038 8603 8100 9003 8100 8685 8603 7654 7720 8528 7720 8528 8603 7654 7467 7590 8100 7911 7401 7467 8038 8437 8685 7911 7467 8100 7529 7194 7911 7911 8437 ... | DO UNTO OTHERS AS YOU WOULD HAVE THEM DO UNTO YOU THIS IS THE GOLDEN RULE OF ALL RELIGIONS | chinese_telegraph | chinese_telegraph | codebook | {
"type": "additive",
"value": "27182"
} | expert | en | 288 | 359 | cipher_museum | 2.0 | public | null | null |
red-type-a-v2-0201 | MTOXUHOWURRWRIVWIWQYPRUEMWAWMFBYSGQNOBXUSZURHAINHYRGYSAYVHPUUILMYWDKDYRLNYPEY | MTOXUHOWURRWRIVWIWQYPRUEMWAWMFBYSGQNOBXUSZURHAINHYRGYSAYVHPUUILMYWDKDYRLNYPEY | THE REGIMENT SHALL ADVANCE AT FIRST LIGHT SUPPORTED BY ARTILLERY ON THE EASTERN FLANK TODAY | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "YAMATO"
} | advanced | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
one-time-pad-050 | HZQGWUSUWFERYHUGOFAUPPZHBOLFAPSDJWSCBKVYGYRHGOKKXLDNQGKRNSNJ | HZQGWUSUWFERYHUGOFAUPPZHBOLFAPSDJWSCBKVYGYRHGOKKXLDNQGKRNSNJ | KNOWLEDGE IS POWER AND INFORMATION IS THE KEY TO VICTORY IN ANY CONFLICT | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "XMCKLQPOS (repeating)"
} | expert | en | 60 | 60 | cipher_museum | 0.2 | public | null | null |
alberti-disk-v3-0229 | ZSGOARLBJOINBSYYHQGNQRXTNN | ZSGOARLBJOINBSYYHQGNQRXTNN | THE PRINTING PRESS CHANGES ALL | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 8
} | expert | en | 26 | 26 | cipher_museum | 2.0 | public | null | null |
confederate-vigenere-v3-0538 | OZGKUIYIEDVVRWDILXO | OZGKUIYIEDVVRWDILXO | TREACHERY IN THE COURT | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "VICKSBURG"
} | intermediate | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
cda-0022159 | VEVIB HBHGVN MVVWH ZM SLMVHG GSIVZG NLWVO UIVJFVMXB ZMZOBHRH XZM IVEVZO DVZP XRKSVIH GSV ERTVMVIV XRKSVI FHVH Z IVKVZGRMT PVBDLIW GSV ORYIZIB KIVHVIEVH PMLDOVWTV ULI GSV XLNNFMRGB | VEVIB HBHGVN MVVWH ZM SLMVHG GSIVZG NLWVO UIVJFVMXB ZMZOBHRH XZM IVEVZO DVZP XRKSVIH GSV ERTVMVIV XRKSVI FHVH Z IVKVZGRMT PVBDLIW GSV ORYIZIB KIVHVIEVH PMLDOVWTV ULI GSV XLNNFMRGB | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE VIGENERE CIPHER USES A REPEATING KEYWORD THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY | atbash | atbash | null | {} | hard | en | 153 | 153 | synthetic_educational | null | null | [
"self_inverse_check",
"frequency_analysis"
] | Atbash maps A↔Z, B↔Y, … and is its own inverse. |
joseon-yeokhak-v2-0136 | PFWRUSRSGHFCMSROHROKB | PFWRUSRSGHFCMSROHROKB | BRIDGE DESTROYED AT DAWN | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "JOSEON"
} | beginner | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
chaocipher-v3-0160 | XMIZREDLVSSGPNYNAXPJXFJLKKHFDUCOONRJGKLFVDZYPWZCWTSUBAKBZILXPJSCJIXPMNOBETFSJZ | XMIZREDLVSSGPNYNAXPJXFJLKKHFDUCOONRJGKLFVDZYPWZCWTSUBAKBZILXPJSCJIXPMNOBETFSJZ | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
adfgvx-v2-0148 | GGDDAGDVADAGGVDDFXAADFGVDFGGDVFG | GGDDAGDVADAGGVDDFXAADFGVDFGGDVFG | DIVIDE AND CONQUER | adfgvx | adfgvx | fractionation | {
"polybius": "LIBERTY",
"columnar": "FREEDOM"
} | advanced | en | 32 | 32 | cipher_museum | 2.0 | public | null | null |
cda-0019975 | 9.35.10 14.34.1 6.50.11 17.44.6 5.6.15 1.16.12 17.22.8 4.14.6 5.19.12 11.22.4 8.45.10 15.31.15 15.18.6 3.13.15 6.10.10 12.22.11 20.46.5 13.29.3 19.49.11 16.19.12 12.28.3 12.19.1 7.2.14 17.2.4 10.12.10 7.33.12 5.33.15 19.38.1 2.25.9 3.27.11 8.9.7 11.43.10 6.13.5 20.10.1 20.31.13 4.26.12 17.6.4 12.42.10 20.42.2 5.27.15 1... | 9.35.10 14.34.1 6.50.11 17.44.6 5.6.15 1.16.12 17.22.8 4.14.6 5.19.12 11.22.4 8.45.10 15.31.15 15.18.6 3.13.15 6.10.10 12.22.11 20.46.5 13.29.3 19.49.11 16.19.12 12.28.3 12.19.1 7.2.14 17.2.4 10.12.10 7.33.12 5.33.15 19.38.1 2.25.9 3.27.11 8.9.7 11.43.10 6.13.5 20.10.1 20.31.13 4.26.12 17.6.4 12.42.10 20.42.2 5.27.15 1... | THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS | book_cipher | book_cipher | null | {} | hard | en | 164 | 164 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Book cipher: coordinates (page.line.word) referencing a shared document. |
cda-0008281 | QWFVU WWYDM VWQST INTQD JVFMR LOLGV VCFZK NKJBB KWPHO IHNKU FKKXJ LSIRX NPFAC TKUFI TNWUD BKWPA PMCKJ SFBVM T | QWFVU WWYDM VWQST INTQD JVFMR LOLGV VCFZK NKJBB KWPHO IHNKU FKKXJ LSIRX NPFAC TKUFI TNWUD BKWPA PMCKJ SFBVM T | OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER | gronsfeld | gronsfeld | null | {
"key": "271828"
} | hard | en | 91 | 91 | synthetic_educational | null | null | [] | |
lorenz-v3-0070 | NEWTONSAWTHEAPPLEFALLANDMNTUITEDSHESAIEFORCETHATHOLDSXHEPLANETSINTHEIRPATHS | NEWTONSAWTHEAPPLEFALLANDMNTUITEDSHESAIEFORCETHATHOLDSXHEPLANETSINTHEIRPATHS | NEWTON SAW THE APPLE FALL AND INTUITED THE SAME FORCE THAT HOLDS THE PLANETS IN THEIR PATHS | lorenz | lorenz | machine | {
"type": "seed",
"value": "TUNNY"
} | expert | en | 75 | 75 | cipher_museum | 2.0 | public | null | null |
cda-0017640 | ⟨a29⟩ ⟨w32⟩ ⟨a01⟩ ⟨a01⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w28⟩ ⟨w22⟩ ⟨w20⟩ ⟨w22⟩ ⟨a01⟩ ⟨w32⟩ ⟨a07⟩ ⟨w20⟩ ⟨w08⟩ ⟨a19⟩ ⟨w08⟩ ⟨a01⟩ ⟨w26⟩ ⟨w20⟩ ⟨a11⟩ ⟨a19⟩ ⟨w08⟩ ⟨a25⟩ ⟨w10⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨a19⟩ ⟨w40⟩ ⟨a13⟩ ⟨a25⟩ ⟨a11⟩ ⟨a01⟩ ⟨w10⟩ ⟨w14⟩ ⟨w38⟩ ⟨w22⟩ ⟨w10⟩ ⟨a23⟩ ⟨a01⟩ ⟨w20⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨w22⟩ ⟨w14⟩ ⟨a01⟩ ⟨w... | ⟨a29⟩ ⟨w32⟩ ⟨a01⟩ ⟨a01⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w28⟩ ⟨w22⟩ ⟨w20⟩ ⟨w22⟩ ⟨a01⟩ ⟨w32⟩ ⟨a07⟩ ⟨w20⟩ ⟨w08⟩ ⟨a19⟩ ⟨w08⟩ ⟨a01⟩ ⟨w26⟩ ⟨w20⟩ ⟨a11⟩ ⟨a19⟩ ⟨w08⟩ ⟨a25⟩ ⟨w10⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨a19⟩ ⟨w40⟩ ⟨a13⟩ ⟨a25⟩ ⟨a11⟩ ⟨a01⟩ ⟨w10⟩ ⟨w14⟩ ⟨w38⟩ ⟨w22⟩ ⟨w10⟩ ⟨a23⟩ ⟨a01⟩ ⟨w20⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨w22⟩ ⟨w14⟩ ⟨a01⟩ ⟨w... | HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS | babington | babington | null | {} | hard | en | 96 | 96 | synthetic_educational | null | null | [
"nomenclator_frequency",
"symbol_mapping"
] | Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot. |
cda-0011435 | RDXCXA ZEYPQYKJMT GV QDH FXZTNN FQ CZYHCX IMNKMKABT | RDXCXA ZEYPQYKJMT GV QDH FXZTNN FQ CZYHCX IMNKMKABT | MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY | beaufort | beaufort | null | {
"key": "DRAGON"
} | medium | en | 44 | 44 | synthetic_educational | null | null | [] | |
four-square-v3-0224 | DLUDQHFPBTIRBKGIOX | DLUDQHFPBTIRBKGIOX | OLD IRONSIDES HOLDS | four_square | four_square | polygraphic | {
"key1": "TRIUMPH",
"key2": "JUSTICE"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
solitaire-v3-0031 | KITKFXIAXUIFVOZATNGAB | KITKFXIAXUIFVOZATNGAB | SONS OF LIBERTY ASSEMBLE | solitaire | solitaire | stream | {
"type": "none",
"value": null
} | expert | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
arnold-andre-011 | 11.2.1 1.1.1 13.1.1 14.4.1 14.3.2 14.1.1 14.3.4 14.4.4 15.1.1 | 11.2.1 1.1.1 13.1.1 14.4.1 14.3.2 14.1.1 14.3.4 14.4.4 15.1.1 | CHANGE OF PLANS | arnold_andre | arnold_andre | codebook | {
"type": "none",
"value": null
} | expert | en | 53 | 61 | cipher_museum | 0.2 | public | null | null |
affine-v2-0258 | OEV CJLL HL EVQS | OEV CJLL HL EVQS | THE PASS IS HELD | affine | affine | substitution | {
"a": 3,
"b": 9
} | beginner | en | 13 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0004718 | NA NSSVAR PVCURE NCCYVRF N YVARNE SHAPGVBA GB RNPU YRGGRE N FGEBAT PYNVZ ARRQF FGEBAT RIVQRAPR FRPHEVGL PYNVZF FUBHYQ OR GRFGRQ HAQRE FPEHGVAL CNGGREA JBEQF URYC OERNX ZBABNYCUNORGVP FHOFGVGHGVBA NYJNLF | NA NSSVAR PVCURE NCCYVRF N YVARNE SHAPGVBA GB RNPU YRGGRE N FGEBAT PYNVZ ARRQF FGEBAT RIVQRAPR FRPHEVGL PYNVZF FUBHYQ OR GRFGRQ HAQRE FPEHGVAL CNGGREA JBEQF URYC OERNX ZBABNYCUNORGVP FHOFGVGHGVBA NYJNLF | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER A STRONG CLAIM NEEDS STRONG EVIDENCE SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION ALWAYS | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 173 | 173 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
copiale-v2-0101 | Q8 R8 X7 O4 T7 B0 M9 O6 Y0 V4 O2 Q6 C4 L9 T0 A3 N2 O1 K8 I8 S3 I6 B2 O8 Z1 M5 L9 N2 T9 M5 T2 D0 I6 C9 T8 N3 B1 T2 H2 P3 A8 X7 A6 L6 N6 Q6 B1 A8 X7 V4 O2 Y6 C2 Q6 T9 A8 R1 C4 T0 B2 M8 K7 O1 P9 L6 M9 A8 Q6 T8 A5 Q7 Q7 R8 M2 N6 O6 G6 | Q8 R8 X7 O4 T7 B0 M9 O6 Y0 V4 O2 Q6 C4 L9 T0 A3 N2 O1 K8 I8 S3 I6 B2 O8 Z1 M5 L9 N2 T9 M5 T2 D0 I6 C9 T8 N3 B1 T2 H2 P3 A8 X7 A6 L6 N6 Q6 B1 A8 X7 V4 O2 Y6 C2 Q6 T9 A8 R1 C4 T0 B2 M8 K7 O1 P9 L6 M9 A8 Q6 T8 A5 Q7 Q7 R8 M2 N6 O6 G6 | DEUTSCHLAND UBER ALLES IN DER WELT WENN ES STETS ZU SCHUTZ UND TRUTZE BRÜDERLICH ZUSAMMENHÄLT | copiale | copiale | substitution | {
"type": "keyword",
"value": "MASONIC"
} | advanced | en | 154 | 230 | cipher_museum | 2.0 | public | null | null |
wallis-cipher-v3-0160 | 90 82 63 81 54 79 53 91 90 84 40 91 90 85 66 76 91 90 88 63 55 75 76 81 15 91 90 54 66 53 80 84 20 18 45 54 25 81 91 90 47 66 41 91 90 81 84 66 63 15 89 91 90 81 54 66 76 91 90 88 63 55 73 76 81 45 91 90 80 63 20 40 88 84 55 18 15 54 85 66 91 90 45 44 25 27 47 53 91 90 76 33 84 40 85 81 91 90 66 25 15 63 41 91 | 90 82 63 81 54 79 53 91 90 84 40 91 90 85 66 76 91 90 88 63 55 75 76 81 15 91 90 54 66 53 80 84 20 18 45 54 25 81 91 90 47 66 41 91 90 81 84 66 63 15 89 91 90 81 54 66 76 91 90 88 63 55 73 76 81 45 91 90 80 63 20 40 88 84 55 18 15 54 85 66 91 90 45 44 25 27 47 53 91 90 76 33 84 40 85 81 91 90 66 25 15 63 41 91 | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "ENGLAND"
} | expert | en | 208 | 311 | cipher_museum | 2.0 | public | null | null |
wallis-cipher-065 | 90 31 70 19 91 90 47 69 11 76 24 91 90 89 58 91 90 82 54 30 27 87 91 | 90 31 70 19 91 90 47 69 11 76 24 91 90 89 58 91 90 82 54 30 27 87 91 | THE COAST IS CLEAR | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 46 | 68 | cipher_museum | 0.2 | public | null | null |
bifid-v2-0341 | TRTGLEINCOIETQFORFOLIOYYMBXCLMOLRFSNPSBNTSBXCLFOYRRFSILNTUMOGFALNGLLRRILGIVALHUMOWMSTXQFYBNQHNHEIFBQKUUXSLHEHNRTYRIXSKUUXSTKICHNKMNPWSRRKNKNSANCCKMNMHG | TRTGLEINCOIETQFORFOLIOYYMBXCLMOLRFSNPSBNTSBXCLFOYRRFSILNTUMOGFALNGLLRRILGIVALHUMOWMSTXQFYBNQHNHEIFBQKUUXSLHEHNRTYRIXSKUUXSTKICHNKMNPWSRRKNKNSANCCKMNMHG | ALL WARFARE IS BASED ON DECEPTION HENCE WHEN ABLE TO ATTACK WE MUST SEEM UNABLE WHEN USING OUR FORCES WE MUST SEEM INACTIVE WHEN WE ARE NEAR WE MUST MAKE THE ENEMY BELIEVE WE ARE FAR AWAY | bifid | bifid | fractionation | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 151 | 151 | cipher_museum | 2.0 | public | null | null |
hill-v3-0233 | JRZHIPJWXPFBIKEL | JRZHIPJWXPFBIKEL | CHART THE UNKNOWN | hill | hill | polygraphic | {
"a": 7,
"b": 3,
"c": 4,
"d": 5
} | advanced | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
chaocipher-v2-0065 | XOKXLWZIZYJKNUQTBYTRCMXORZVUXVXYQJJQNDIVXHKVASQAUUBVRTVAZGNNHYCSBJZGDDHCNC | XOKXLWZIZYJKNUQTBYTRCMXORZVUXVXYQJJQNDIVXHKVASQAUUBVRTVAZGNNHYCSBJZGDDHCNC | I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
scytale-vg-0003 | TUHLEBHUATRTVHEESWTOIRSKPELRESNFTEIWFX | TUHLEBHUATRTVHEESWTOIRSKPELRESNFTEIWFX | THE HARVEST IS PLENTIFUL BUT THE WORKERS FEW | scytale | scytale | transposition | {
"type": "integer",
"value": 2
} | intermediate | en | 38 | 38 | cipher_museum | 2.0 | public | null | null |
cda-0003444 | ENTE OSOE ROSH IZEE AHND EACE AEET XHHB WAHC OIOR MUEE SNYZ HDRT RIEL HXRX NETO DNES NYNI STUT PEOS LRFI LTXB MKRX NEDO AHIO CXHS CRLE ERAE OSRO ETOI TTLC NTFP AMFN PIHE TNTO ELIT XACP PTIA MSWI ECTM IIFR TESW SUTT GXST GPIW NTEE LTIE EDEA ESSO NGTC INW | ENTE OSOE ROSH IZEE AHND EACE AEET XHHB WAHC OIOR MUEE SNYZ HDRT RIEL HXRX NETO DNES NYNI STUT PEOS LRFI LTXB MKRX NEDO AHIO CXHS CRLE ERAE OSRO ETOI TTLC NTFP AMFN PIHE TNTO ELIT XACP PTIA MSWI ECTM IIFR TESW SUTT GXST GPIW NTEE LTIE EDEA ESSO NGTC INW | THE BEST LESSONS SHOW WHERE THE METHOD FAILS THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN TOMORROW | double_transposition | double_transposition | null | {
"key1": "MUSEUM",
"key2": "FREEDOM"
} | hard | en | 203 | 203 | synthetic_educational | null | null | [
"key_length_search",
"anagram_recovery"
] | Double columnar transposition: apply columnar twice for stronger security. |
cda-0018324 | 6313 2591 1601 00325 5671 00987 02587 02884 06370 1571 1038 06289 06663 05731 01627 6007 02584 04783 6646 03844 1342 04180 0318 03531 1624 4167 02883 5966 6613 6049 01628 2610 00336 05732 1267 1644 5667 06334 02519 1649 05066 3845 0402 07937 01892 0361 2878 05738 00972 2894 05066 2558 1664 5698 01625 4460 1035 05656 07... | 6313 2591 1601 00325 5671 00987 02587 02884 06370 1571 1038 06289 06663 05731 01627 6007 02584 04783 6646 03844 1342 04180 0318 03531 1624 4167 02883 5966 6613 6049 01628 2610 00336 05732 1267 1644 5667 06334 02519 1649 05066 3845 0402 07937 01892 0361 2878 05738 00972 2894 05066 2558 1664 5698 01625 4460 1035 05656 07... | THE ARCHITECTURE SHOULD MAKE MISUSE HARDER THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF | zimmermann | zimmermann | null | {} | hard | en | 141 | 141 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
lorenz-067 | ABORTMISSIONNOW | ABORTMISSIONNOW | ABORT MISSION NOW | lorenz | lorenz | machine | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
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