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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
enigma-v2-0735 | HFQISLXAJCPYUGYSTRJSKGWJATYUZZJVDJULDGSGQWOBSMVZJLBCFPLBTTNFCPMHJWTDYMEAGRVVHULKAVLH | HFQISLXAJCPYUGYSTRJSKGWJATYUZZJVDJULDGSGQWOBSMVZJLBCFPLBTTNFCPMHJWTDYMEAGRVVHULKAVLH | THE REGIMENT WILL HOLD ITS POSITION UNTIL REINFORCEMENTS ARRIVE FROM THE EASTERN COMMAND POST HERE | enigma | enigma | machine | {
"type": "rotor_start",
"value": "PQR"
} | expert | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v2-0467 | MJN QRQYEKMUE CFUM MU RXXRXXYERMN BONNE NFYWRQNMJ ZRX OEPUDNANV QI LAREPYX ZRFXYEKJRT YE MYTN | MJN QRQYEKMUE CFUM MU RXXRXXYERMN BONNE NFYWRQNMJ ZRX OEPUDNANV QI LAREPYX ZRFXYEKJRT YE MYTN | THE BABINGTON PLOT TO ASSASSINATE QUEEN ELIZABETH WAS UNCOVERED BY FRANCIS WALSINGHAM IN TIME | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 80 | 93 | cipher_museum | 2.0 | public | null | null |
jn25-v3-0050 | 26188 26193 26192 26104 26181 26184 26186 26188 26193 26193 26188 26193 26186 26188 26198 26192 26104 26184 26193 26183 26180 26193 26183 26188 26193 26192 26104 26184 26193 26183 26188 26198 26192 26104 26181 26184 26186 26188 26193 26193 26188 26193 26186 26180 26198 26199 26187 26184 26196 26100 26184 26184 26193 26... | 26188 26193 26192 26104 26181 26184 26186 26188 26193 26193 26188 26193 26186 26188 26198 26192 26104 26184 26193 26183 26180 26193 26183 26188 26193 26192 26104 26184 26193 26183 26188 26198 26192 26104 26181 26184 26186 26188 26193 26193 26188 26193 26186 26180 26198 26199 26187 26184 26196 26100 26184 26184 26193 26... | IN MY BEGINNING IS MY END AND IN MY END IS MY BEGINNING AS THE QUEEN OF SCOTS KNEW WELL | jn25 | jn25 | codebook | {
"type": "additive",
"value": "16180"
} | expert | en | 340 | 407 | cipher_museum | 2.0 | public | null | null |
typex-v3-0096 | ZRNYYAIMJWDPITYIVZLNNIOKNJYCCZBDLTJIRSQTPQOQBBEVEJAWUGERZDMJKFEDDMCGGNDKNLNGLDDQJLFFSNDTOQDPXLJJVSUFCMSSRLRVUHXOMFDLJCSWIWNKHNZKNVDPGTVOWZGFWCSPQJYDYXRWCZHKLLWJAEWCH | ZRNYYAIMJWDPITYIVZLNNIOKNJYCCZBDLTJIRSQTPQOQBBEVEJAWUGERZDMJKFEDDMCGGNDKNLNGLDDQJLFFSNDTOQDPXLJJVSUFCMSSRLRVUHXOMFDLJCSWIWNKHNZKNVDPGTVOWZGFWCSPQJYDYXRWCZHKLLWJAEWCH | 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 | typex | typex | machine | {
"type": "keyword",
"value": "LONDON"
} | expert | en | 165 | 165 | cipher_museum | 2.0 | public | null | null |
cda-0008205 | OHLTGMYUNNERSLTLYWOPCEEHESETSSLSSWIPMISUHOAXSOPPOYSOTASALLRAMAUSITRSATAEOCCBANNMTSMDUDOIDUACENHNNSTLDOARAOOHANRLWERXRRRSADEDPNKRSELOEUTRCTOHICHOIURCLOARIHSTIUNTNENGESAASINETR | OHLTGMYUNNERSLTLYWOPCEEHESETSSLSSWIPMISUHOAXSOPPOYSOTASALLRAMAUSITRSATAEOCCBANNMTSMDUDOIDUACENHNNSTLDOARAOOHANRLWERXRRRSADEDPNKRSELOEUTRCTOHICHOIURCLOARIHSTIUNTNENGESAASINETR | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS A TRANSPARENT TOOL SHOULD SHOW ITS REASONING | double_transposition | double_transposition | null | {
"key1": "MUSEUM",
"key2": "SIGNAL"
} | hard | en | 174 | 174 | synthetic_educational | null | null | [] | |
chinese-telegraph-v2-0019 | 0156 0918 0856 1421 0012 0156 1421 0472 0012 1346 0074 0285 0285 0856 0792 0012 0219 0285 | 0156 0918 0856 1421 0012 0156 1421 0472 0012 1346 0074 0285 0285 0856 0792 0012 0219 0285 | CONTACT HAS BEEN MADE | chinese_telegraph | chinese_telegraph | codebook | {
"type": "none",
"value": null
} | expert | en | 72 | 89 | cipher_museum | 2.0 | public | null | null |
scytale-vg-0092 | TTNEGWHTOTBHEOROUORTTTTEAHHHTNCEEEODESBSTUIWATHRSITROENFTOSXOTLNEX | TTNEGWHTOTBHEOROUORTTTTEAHHHTNCEEEODESBSTUIWATHRSITROENFTOSXOTLNEX | THE RACE IS NOT TO THE SWIFT NOR THE BATTLE TO THE STRONG BUT TO THOSE WHO ENDURE | scytale | scytale | transposition | {
"type": "integer",
"value": 6
} | intermediate | en | 66 | 66 | cipher_museum | 2.0 | public | null | null |
stager-route-065 | TOIEASAHESCRXLTC | TOIEASAHESCRXLTC | THE COAST IS CLEAR | stager_route | stager_route | transposition | {
"type": "integer",
"value": 4
} | expert | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
sigaba-v3-0211 | KDPHCPBHJVYLBRFCSYWHJGN | KDPHCPBHJVYLBRFCSYWHJGN | ROME WAS NOT BUILT IN ONE DAY | sigaba | sigaba | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 23 | 23 | cipher_museum | 2.0 | public | null | null |
cda-0016269 | 66 36 82 76 69 59 80 61 72 59 68 80 82 52 50 65 36 82 80 59 61 82 61 66 89 69 55 82 43 89 69 80 11 65 69 57 43 20 50 59 61 61 72 59 68 80 82 61 11 69 59 20 57 82 66 80 68 29 61 65 69 61 50 66 50 69 29 68 65 65 57 50 82 61 52 69 57 59 77 29 68 80 82 29 52 80 43 65 66 50 69 29 66 89 50 52 82 52 69 57 59 77 29 68 80 66 80... | 66 36 82 76 69 59 80 61 72 59 68 80 82 52 50 65 36 82 80 59 61 82 61 66 89 69 55 82 43 89 69 80 11 65 69 57 43 20 50 59 61 61 72 59 68 80 82 61 11 69 59 20 57 82 66 80 68 29 61 65 69 61 50 66 50 69 29 68 65 65 57 50 82 61 52 69 57 59 77 29 68 80 82 29 52 80 43 65 66 50 69 29 66 89 50 52 82 52 69 57 59 77 29 68 80 66 80... | THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER | wallis_cipher | wallis_cipher | null | {} | hard | en | 140 | 140 | synthetic_educational | null | null | [
"number_substitution_decode",
"frequency_analysis"
] | Wallis cipher: each letter mapped to a unique two-digit number from a fixed table. |
vigenere-v2-1029 | PESAWVKXVPJ | PESAWVKXVPJ | KNOW THYSELF | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "FREEDOM"
} | intermediate | en | 11 | 11 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0163 | WAEPATALBHIHEUTEOYCBBBZRLEFHIPHTIOUDKXKTDEPIIHIZMTKFOKLNFFPSZREU | WAEPATALBHIHEUTEOYCBBBZRLEFHIPHTIOUDKXKTDEPIIHIZMTKFOKLNFFPSZREU | WHAT IS IN A NAME THAT WHICH WE CALL A ROSE BY ANY OTHER NAME WOULD SMELL AS SWEET | four_square | four_square | polygraphic | {
"key1": "LIBERTY",
"key2": "FREEDOM"
} | advanced | en | 64 | 64 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v2-1115 | IPYSYFPVFGQEWFBHOCFGUTEHURVVGGWIISYESSVMKUJPXWISOZKJWDUQUMOKQUEOKZOEUOROGPTFFMWKGJRMOEFVUEDOHEKGJGBZHEXPZKFTSUSPWJZLPRUNDUEMRPFRBXHDVFGWFHFWXBP | IPYSYFPVFGQEWFBHOCFGUTEHURVVGGWIISYESSVMKUJPXWISOZKJWDUQUMOKQUEOKZOEUOROGPTFFMWKGJRMOEFVUEDOHEKGJGBZHEXPZKFTSUSPWJZLPRUNDUEMRPFRBXHDVFGWFHFWXBP | FOURSCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH ON THIS CONTINENT A NEW NATION CONCEIVED IN LIBERTY AND DEDICATED TO THE PROPOSITION THAT ALL MEN ARE CREATED EQUAL | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "31416"
} | intermediate | en | 143 | 143 | cipher_museum | 2.0 | public | null | null |
cardano-autokey-v3-0081 | FALQAZPFVLZMHGHITXVGALMVGXPWTOKRPGEGKRPANPSKWHYDBTLDWGTVXLLHHALSHALVJALHJTFPCERJ | FALQAZPFVLZMHGHITXVGALMVGXPWTOKRPGEGKRPANPSKWHYDBTLDWGTVXLLHHALSHALVJALHJTFPCERJ | THE MOLE BURIED DEEP IN THE INTELLIGENCE AGENCY PASSED VITAL SECRETS TO THE OTHER SIDE FOR YEARS | cardano_autokey | cardano_autokey | polyalphabetic | {
"type": "keyword",
"value": "MILAN"
} | advanced | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
sigaba-v2-0435 | QFBXTIWOKNJLQEUPWWXBLQXZZFAOAXLOWVNWGSPAYWWVXKIUBUPKTIZQYTGWJMLVIYVZVHU | QFBXTIWOKNJLQEUPWWXBLQXZZFAOAXLOWVNWGSPAYWWVXKIUBUPKTIZQYTGWJMLVIYVZVHU | WITH MALICE TOWARD NONE WITH CHARITY FOR ALL LET US BIND UP THE NATIONS WOUNDS AND HEAL | sigaba | sigaba | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 71 | 71 | cipher_museum | 2.0 | public | null | null |
chaocipher-v3-0056 | VQZUEZQXGEYEWCBFTDVOIOEFSQJTXLULAVHNOECHEPOJQTQUTNZKUDSLYOEVMIYSKNIMYASNZKEYQE | VQZUEZQXGEYEWCBFTDVOIOEFSQJTXLULAVHNOECHEPOJQTQUTNZKUDSLYOEVMIYSKNIMYASNZKEYQE | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | chaocipher | chaocipher | machine | {
"type": "keyword",
"value": "PALACE"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
enigma-v3-0337 | BQYHUMMXWACMJFU | BQYHUMMXWACMJFU | CHART THE UNKNOWN | enigma | enigma | machine | {
"type": "rotor_start",
"value": "JKL"
} | expert | en | 15 | 15 | cipher_museum | 2.0 | public | null | null |
straddling-checkerboard-v2-0227 | 222372652126094227220238900235142223874230674234423556236577725212672677724226872677232082223801212677725929292342606 | 222372652126094227220238900235142223874230674234423556236577725212672677724226872677232082223801212677725929292342606 | DEUTSCHLAND UBER ALLES IN DER WELT WENN ES STETS ZU SCHUTZ UND TRUTZE BRÜDERLICH ZUSAMMENHÄLT | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "LIONSTRACE"
} | advanced | en | 117 | 117 | cipher_museum | 2.0 | public | null | null |
caesar-303 | XLI IEKPI LEW PERHIH | XLI IEKPI LEW PERHIH | THE EAGLE HAS LANDED | caesar | caesar | substitution | {
"type": "shift",
"value": 4
} | beginner | en | 17 | 20 | cipher_museum | 0.2 | public | null | null |
geheimschreiber-v2-0125 | VAJMCKVCQUPADEXLEYHVEZQCKSTVDKGYEEIFNHVZTNMFTXEMYBDVCAPJTGRTWIIAESIXCXNFIQETWFHCOGMBQJFZPKBKVVWINOMVEPRWTABKEWJEAJXYYVOHPYCLVLSEMSICIGDELVROEGLNBXRHANDDOLTBNHRANWSOVGUIDGUV | VAJMCKVCQUPADEXLEYHVEZQCKSTVDKGYEEIFNHVZTNMFTXEMYBDVCAPJTGRTWIIAESIXCXNFIQETWFHCOGMBQJFZPKBKVVWINOMVEPRWTABKEWJEAJXYYVOHPYCLVLSEMSICIGDELVROEGLNBXRHANDDOLTBNHRANWSOVGUIDGUV | 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 | geheimschreiber | geheimschreiber | machine | {
"type": "seed",
"value": "BERLIN"
} | expert | en | 172 | 172 | cipher_museum | 2.0 | public | null | null |
hill-143 | HVMSDIKMTEIEXR | HVMSDIKMTEIEXR | THE KING IS DEAD | hill | hill | polygraphic | {
"a": 2,
"b": 3,
"c": 1,
"d": 4
} | advanced | en | 14 | 14 | cipher_museum | 0.2 | public | null | null |
typex-v3-0080 | CBBDWWBYROYMYOYGVARSLLUXFEMMNJFOUOFNXVAJLDSCSZJTBDEWHSNTUDFROGIDOULHUSSVMAGPIXLWKH | CBBDWWBYROYMYOYGVARSLLUXFEMMNJFOUOFNXVAJLDSCSZJTBDEWHSNTUDFROGIDOULHUSSVMAGPIXLWKH | HUMINT OR HUMAN INTELLIGENCE GATHERING RELIES ON PERSONAL CONTACT AND HUMAN SOURCES IN THE FIELD | typex | typex | machine | {
"type": "keyword",
"value": "LONDON"
} | expert | en | 82 | 82 | cipher_museum | 2.0 | public | null | null |
sigaba-v2-0446 | WJIBXQLEVNJBMGWQLCXJZPCELRGAUYLGZLPWCOPIMCVDRMXGDBPZTMYDCFPMLKHBIWWHLHPYNBLX | WJIBXQLEVNJBMGWQLCXJZPCELRGAUYLGZLPWCOPIMCVDRMXGDBPZTMYDCFPMLKHBIWWHLHPYNBLX | BLESSED ARE THE PURE IN HEART FOR THEY SHALL SEE GOD AND BLESSED ARE THE PEACEMAKERS AMONG US | sigaba | sigaba | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
cda-0021595 | L ┌· ┌· ┘· ┌· r ┘· ┌· ┌· L r K Γ· ┘· ─ ⌐ ─ Γ Γ L K L r K Γ· ┘· ─ ⌐ ┌· L ⌐· X· ─ Γ ⌐ ┌ L ─ K ⌐ └ K ┘· X L r X· ┌· L X ⌒· X K L ┌ X Γ Γ· ¬· ┌· ⌐ ┐· r· ⌐ ─ Γ K ┌· Γ· ¬· ┌· ⌐ ┐· r· ⌐· ┌· L └· X· L ─ r Γ· L X L ⌣ ┐· ┘· X L X Γ· ┌ ┐· └ L r Γ· ┐· r· L ┌· X K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ r Γ· ┐· r· L ┌· X ┌· L ⌐ ┌· ┌· ⌐ ─ ¬· ... | L ┌· ┌· ┘· ┌· r ┘· ┌· ┌· L r K Γ· ┘· ─ ⌐ ─ Γ Γ L K L r K Γ· ┘· ─ ⌐ ┌· L ⌐· X· ─ Γ ⌐ ┌ L ─ K ⌐ └ K ┘· X L r X· ┌· L X ⌒· X K L ┌ X Γ Γ· ¬· ┌· ⌐ ┐· r· ⌐ ─ Γ K ┌· Γ· ¬· ┌· ⌐ ┐· r· ⌐· ┌· L └· X· L ─ r Γ· L X L ⌣ ┐· ┘· X L X Γ· ┌ ┐· └ L r Γ· ┐· r· L ┌· X K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ r Γ· ┐· r· L ┌· X ┌· L ⌐ ┌· ┌· ⌐ ─ ¬· ... | ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS | pigpen | pigpen | null | {} | hard | en | 86 | 86 | synthetic_educational | null | null | [
"symbol_frequency",
"grid_position_decode"
] | Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids. |
m209-v3-0024 | LXXFTTYWJGWLXJL | LXXFTTYWJGWLXJL | THE WIND IS WITH US | m209 | m209 | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 15 | 15 | cipher_museum | 2.0 | public | null | null |
sigaba-v2-0261 | GUDXIDVXFRWIMFDE | GUDXIDVXFRWIMFDE | THE HARBOR IS CLEAR | sigaba | sigaba | machine | {
"type": "seed",
"value": "FREEDOM"
} | expert | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
cda-0013266 | 82 39 27 15 91 32 34 49 99 24 67 58 45 80 22 23 99 49 57 40 82 78 59 60 88 87 3 66 67 50 82 15 62 60 88 22 67 72 4 67 22 40 27 35 94 66 15 22 68 88 23 67 59 46 66 52 35 93 63 94 33 3 35 26 4 67 59 81 23 43 27 63 76 30 92 67 66 14 50 11 36 14 82 58 33 78 49 68 94 25 34 2 15 11 63 45 11 59 68 66 72 81 94 59 30 39 87 59 6... | 82 39 27 15 91 32 34 49 99 24 67 58 45 80 22 23 99 49 57 40 82 78 59 60 88 87 3 66 67 50 82 15 62 60 88 22 67 72 4 67 22 40 27 35 94 66 15 22 68 88 23 67 59 46 66 52 35 93 63 94 33 3 35 26 4 67 59 81 23 43 27 63 76 30 92 67 66 14 50 11 36 14 82 58 33 78 49 68 94 25 34 2 15 11 63 45 11 59 68 66 72 81 94 59 30 39 87 59 6... | ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS PERHAPS | homophonic | homophonic | null | {} | hard | en | 160 | 160 | synthetic_educational | null | null | [
"frequency_analysis",
"multiple_ciphertext_attack"
] | Homophonic substitution: each letter maps to multiple possible numbers. |
argenti-v2-0045 | 14 41 66 44 57 62 32 18 22 16 25 53 73 65 14 43 72 51 88 32 35 30 75 22 25 87 80 88 73 82 24 22 57 51 69 66 14 45 39 44 73 15 65 53 25 32 49 16 75 30 72 52 41 14 73 43 88 34 57 59 | 14 41 66 44 57 62 32 18 22 16 25 53 73 65 14 43 72 51 88 32 35 30 75 22 25 87 80 88 73 82 24 22 57 51 69 66 14 45 39 44 73 15 65 53 25 32 49 16 75 30 72 52 41 14 73 43 88 34 57 59 | THIS ABOVE ALL TO THINE OWN SELF BE TRUE AND IT MUST FOLLOW AS NIGHT THE DAY | argenti | argenti | nomenclator | {
"type": "seed",
"value": "ROME"
} | expert | en | 120 | 179 | cipher_museum | 2.0 | public | null | null |
cda-0012757 | 7.1.4 5.3.1 6.3.2 8.5.4 2.6.3 18.4.5 1.4.10 17.6.6 11.2.1 5.3.6 4.6.1 15.1.7 3.6.2 11.4.9 18.2.10 14.2.8 12.4.4 10.6.5 9.4.5 6.5.1 10.6.7 19.3.3 10.1.7 3.1.6 17.6.8 2.6.3 3.5.9 17.3.9 4.2.3 3.3.8 12.6.2 9.6.2 7.1.10 9.1.4 16.3.5 11.5.8 5.5.9 12.3.7 9.4.8 3.5.1 20.6.1 10.3.3 6.2.1 13.4.4 9.4.6 4.4.7 1.3.9 3.1.7 16.3.8 1... | 7.1.4 5.3.1 6.3.2 8.5.4 2.6.3 18.4.5 1.4.10 17.6.6 11.2.1 5.3.6 4.6.1 15.1.7 3.6.2 11.4.9 18.2.10 14.2.8 12.4.4 10.6.5 9.4.5 6.5.1 10.6.7 19.3.3 10.1.7 3.1.6 17.6.8 2.6.3 3.5.9 17.3.9 4.2.3 3.3.8 12.6.2 9.6.2 7.1.10 9.1.4 16.3.5 11.5.8 5.5.9 12.3.7 9.4.8 3.5.1 20.6.1 10.3.3 6.2.1 13.4.4 9.4.6 4.4.7 1.3.9 3.1.7 16.3.8 1... | COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER FAIL CLOSED IS A POSTURE NOT A SLOGAN | arnold_andre | arnold_andre | null | {} | medium | en | 73 | 73 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Arnold-André book cipher: coordinates (page.section.word) referencing a shared text. |
cda-0019643 | KULRQPHRNBIKVPTEMOFMGNKXHYXEWLQUNXAPKYOHDFUNHGUTGHVOWJYOUTCBAKRDRVMPVCMXJBHMIWWDIVWFMTKHTMJTBGUVXOJIYMTRUTBNLAJZXWFCXHXBGPYZOTVDNQDRSMUJCVLNFJQATFGGDZNZMLPLMYLSVHQNCJLDDPTIBJPG | KULRQPHRNBIKVPTEMOFMGNKXHYXEWLQUNXAPKYOHDFUNHGUTGHVOWJYOUTCBAKRDRVMPVCMXJBHMIWWDIVWFMTKHTMJTBGUVXOJIYMTRUTBNLAJZXWFCXHXBGPYZOTVDNQDRSMUJCVLNFJQATFGGDZNZMLPLMYLSVHQNCJLDDPTIBJPG | ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER ATBASH ENCODES BY REVERSING THE ALPHABET ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN | vernam | vernam | null | {} | hard | en | 176 | 176 | synthetic_educational | null | null | [
"key_reuse_attack",
"information_theoretic_proof"
] | Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP. |
autokey-v2-0724 | VFLYPIYCBVQLLJIBFUVVAKOGMFHVGMRJGVPIEYXGVOFDIFYEXPYOGNEMCEJXYAJHYKIRRGTYAMLGCRPNVTEW | VFLYPIYCBVQLLJIBFUVVAKOGMFHVGMRJGVPIEYXGVOFDIFYEXPYOGNEMCEJXYAJHYKIRRGTYAMLGCRPNVTEW | CODED TRANSMISSION INDICATES ENEMY FORCES ASSEMBLING ALONG THE BORDER WITH HEAVY ARTILLERY UNITS | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
diana-239 | TNOEDTYPWEDEUGNJMTMJKSFYVBSRSITGZXQUTUZAMTECSSUTTQBQPBEPOEHJJQSLNMVGSBQETNONBYUUNABOYDZQDSEHLAHKIMZWCMUARVQKTGNWHWSMBGYFESLCUZYHFQUKKGYRBLIHOYJIKBOB | TNOEDTYPWEDEUGNJMTMJKSFYVBSRSITGZXQUTUZAMTECSSUTTQBQPBEPOEHJJQSLNMVGSBQETNONBYUUNABOYDZQDSEHLAHKIMZWCMUARVQKTGNWHWSMBGYFESLCUZYHFQUKKGYRBLIHOYJIKBOB | 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 | diana | diana | polyalphabetic | {
"type": "keyword",
"value": "MUSEUM"
} | intermediate | en | 148 | 148 | cipher_museum | 0.2 | public | null | null |
lorenz-v2-0249 | ENEMYRETREATSNORTH | ENEMYRETREATSNORTH | ENEMY RETREATS NORTH | lorenz | lorenz | machine | {
"type": "seed",
"value": "COLOSSUS"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
cda-0018296 | - .... . / -... . ... - / .-.. . ... ... --- -. ... / ... .... --- .-- / .-- .... . .-. . / - .... . / -- . - .... --- -.. / ..-. .- .. .-.. ... / .... .. .-.. .-.. / -.-. .. .--. .... . .-. / ..- ... . ... / .-.. .. -. . .- .-. / .- .-.. --. . -... .-. .- / - --- / . -. -.-. .-. -.-- .--. - / -... .-.. --- -.-. -.- ..... | - .... . / -... . ... - / .-.. . ... ... --- -. ... / ... .... --- .-- / .-- .... . .-. . / - .... . / -- . - .... --- -.. / ..-. .- .. .-.. ... / .... .. .-.. .-.. / -.-. .. .--. .... . .-. / ..- ... . ... / .-.. .. -. . .- .-. / .- .-.. --. . -... .-. .- / - --- / . -. -.-. .-. -.-- .--. - / -... .-.. --- -.-. -.- ..... | THE BEST LESSONS SHOW WHERE THE METHOD FAILS HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE | morse_code | morse_code | null | {} | hard | en | 171 | 171 | synthetic_educational | null | null | [
"symbol_decode",
"frequency_analysis"
] | Morse code: dots and dashes; word-separated by / symbol. |
cda-0018907 | 843 847 812 841 999 856 843 861 852 806 814 999 859 844 842 834 856 999 802 833 834 842 868 999 825 839 811 814 845 813 841 810 812 841 858 999 864 813 851 825 817 824 806 801 857 826 844 840 999 824 841 809 813 870 999 843 817 999 806 844 824 840 806 825 811 812 840 806 812 999 838 813 801 854 860 851 814 856 999 835 ... | 843 847 812 841 999 856 843 861 852 806 814 999 859 844 842 834 856 999 802 833 834 842 868 999 825 839 811 814 845 813 841 810 812 841 858 999 864 813 851 825 817 824 806 801 857 826 844 840 999 824 841 809 813 870 999 843 817 999 806 844 824 840 806 825 811 812 840 806 812 999 838 813 801 854 860 851 814 856 999 835 ... | OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS | culper_ring | culper_ring | null | {} | hard | en | 181 | 181 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
cda-0011168 | IONN ASEQ YRIO IDUR LSCC FNDC IEUE FEIB NXUS NRTR MDOE XIEE ETEC TTX | IONN ASEQ YRIO IDUR LSCC FNDC IEUE FEIB NXUS NRTR MDOE XIEE ETEC TTX | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION | stager_route | stager_route | null | {
"cols": 5
} | medium | en | 55 | 55 | synthetic_educational | null | null | [] | |
cda-0021058 | ykcheol choldaiin shor otaiin rcheol shedy shal daral daral ykcheol qokedy sheedy sharal oror shaiin lkaiin oxed qokeedy sharal qokeedy chedal sharal sharal kaiiin sharal okedy cheol cheol shor qotedy sharal ctaiin aiiin | ykcheol choldaiin shor otaiin rcheol shedy shal daral daral ykcheol qokedy sheedy sharal oror shaiin lkaiin oxed qokeedy sharal qokeedy chedal sharal sharal kaiiin sharal okedy cheol cheol shor qotedy sharal ctaiin aiiin | THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS | voynich_render | voynich_render | null | {} | hard | en | 188 | 188 | synthetic_educational | null | null | [
"statistical_analysis",
"unsolved"
] | Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output. |
vigenere-v2-1289 | WOGWVUQRPIPBTGMPQGCIF | WOGWVUQRPIPBTGMPQGCIF | PATIENCE BRINGS VICTORY | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "HONOR"
} | intermediate | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
trifid-v3-0406 | UGEBWQOEWJQEDIKRARIJRFAAPLM+MXFSCKUB+FNUNQOEMEGFDZQCEKUWLGDSUDFPUKFRMUUCEBZOAXMBRSXOBFQCJNFKWKCVQDWAHMGIUPPROTXGEEWUSOAKDDUVYUUZLIJZDOAECKGDAMOWOMVSOCIISZGJCPFTS | UGEBWQOEWJQEDIKRARIJRFAAPLM+MXFSCKUB+FNUNQOEMEGFDZQCEKUWLGDSUDFPUKFRMUUCEBZOAXMBRSXOBFQCJNFKWKCVQDWAHMGIUPPROTXGEEWUSOAKDDUVYUUZLIJZDOAECKGDAMOWOMVSOCIISZGJCPFTS | WHENEVER ANY FORM OF GOVERNMENT BECOMES DESTRUCTIVE OF THESE ENDS IT IS THE RIGHT OF THE PEOPLE TO ALTER OR TO ABOLISH IT AND TO INSTITUTE NEW GOVERNMENT LAYING ITS FOUNDATION ON SUCH PRINCIPLES | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 161 | 161 | cipher_museum | 2.0 | public | null | null |
double-transposition-v3-0007 | VTRATOHMCIYOCR | VTRATOHMCIYOCR | MARCH TO VICTORY | double_transposition | double_transposition | transposition | {
"key1": "PALACE",
"key2": "BATTLE"
} | advanced | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
red-type-a-v2-0271 | HYSSAXCCYXRIILQYXO | HYSSAXCCYXRIILQYXO | CONTACT HAS BEEN MADE | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "TOKYO"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
wallis-cipher-v2-0151 | 90 15 55 79 53 45 91 90 12 72 15 91 90 37 63 20 54 61 89 91 | 90 15 55 79 53 45 91 90 12 72 15 91 90 37 63 20 54 61 89 91 | TRUST BUT VERIFY | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "ENGLAND"
} | expert | en | 40 | 59 | cipher_museum | 2.0 | public | null | null |
caesar-250 | PDA LWYGWCA EO ZAHERANAZ | PDA LWYGWCA EO ZAHERANAZ | THE PACKAGE IS DELIVERED | caesar | caesar | substitution | {
"type": "shift",
"value": 22
} | beginner | en | 21 | 24 | cipher_museum | 0.2 | public | null | null |
adfgvx-v3-0514 | DAFDDDAAGFFAFADAADDAFDFFDAFGFFFGAGFAVAGFAVDFAFVGADADAFGFVXXVGDDGVXVDXVXXVGXDGVGFVGVGXDVDGDADFGDAXDDXADVFFXXGAFGGGGDAAGAVAGDFGGGDAAFFGGAVAGDDDADFDFFADAFFDAFFFGFAAVAVVVXDDXAVFFFDDFVXVVVFDVDVVFVVVGXGDVDXFGVDVGXFVDFDVAXGDDFDXFFDDAGDXVDFDGDDGVGDFADXDFFVXDDDVVFGDVFDGFGVDDVFAGAFDGGDAGDGAGFDFDFAADGAFDAGAAAFDAFAFFFFAADFAGFAAFAA | DAFDDDAAGFFAFADAADDAFDFFDAFGFFFGAGFAVAGFAVDFAFVGADADAFGFVXXVGDDGVXVDXVXXVGXDGVGFVGVGXDVDGDADFGDAXDDXADVFFXXGAFGGGGDAAGAVAGDFGGGDAAFFGGAVAGDDDADFDFFADAFFDAFFFGFAAVAVVVXDDXAVFFFDDFVXVVVFDVDVVFVVVGXGDVDXFGVDVGXFVDFDVAXGDDFDXFFDDAGDXVDFDGDDGVGDFADXDFFVXDDDVVFGDVFDGFGVDDVFAGAFDGGDAGDGAGFDFDFAADGAFDAGAAAFDAFAFFFFAADFAGFAAFAA | FOR I KNOW THE THOUGHTS THAT I THINK TOWARD YOU SAITH THE LORD THOUGHTS OF PEACE AND NOT OF EVIL TO GIVE YOU AN EXPECTED END THEN SHALL YE CALL UPON ME AND YE SHALL GO AND PRAY UNTO ME AND I WILL HEARKEN | adfgvx | adfgvx | fractionation | {
"polybius": "KAISER",
"columnar": "BERLIN"
} | advanced | en | 320 | 320 | cipher_museum | 2.0 | public | null | null |
vigenere-v3-0917 | YYITRKQWJRSWRQQVKEWSPYFXLHIZNKIHVHMYVWFBHTJTSRVHUYLXMRBMWVVIVSDAVHXRHTJJXEWSE | YYITRKQWJRSWRQQVKEWSPYFXLHIZNKIHVHMYVWFBHTJTSRVHUYLXMRBMWVVIVSDAVHXRHTJJXEWSE | THE POWERS NOT DELEGATED TO THE UNITED STATES BY THE CONSTITUTION ARE RESERVED TO THE STATES | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "FREEDOM"
} | intermediate | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
hill-212 | ZCNSFMSDTXPSCHGQVDHVEOEUVQIXSMWQESBDEMGCRNESLN | ZCNSFMSDTXPSCHGQVDHVEOEUVQIXSMWQESBDEMGCRNESLN | NEVER INTERRUPT YOUR ENEMY WHEN HE IS MAKING A MISTAKE | hill | hill | polygraphic | {
"a": 5,
"b": 3,
"c": 2,
"d": 7
} | advanced | en | 46 | 46 | cipher_museum | 0.2 | public | null | null |
trifid-v2-0543 | APTOTLO+RZPKZKUICOALOCLX | APTOTLO+RZPKZKUICOALOCLX | TORPEDO AWAY ALL HANDS BRACE | trifid | trifid | fractionation | {
"type": "keyword",
"value": "JUSTICE"
} | advanced | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
bazeries-v2-0357 | LYVODNEYUOFYVCCNNRCGGJMONONMFPFGLCNOSFNYYILGOFYDLLTMSYQNODGLTYYVLYOMDGIFRFTDOMGJYLYV | LYVODNEYUOFYVCCNNRCGGJMONONMFPFGLCNOSFNYYILGOFYDLLTMSYQNODGLTYYVLYOMDGIFRFTDOMGJYLYV | THE REGIMENT WILL HOLD ITS POSITION UNTIL REINFORCEMENTS ARRIVE FROM THE EASTERN COMMAND POST HERE | bazeries | bazeries | transposition | {
"type": "integer",
"value": 37
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
chinese-telegraph-v3-0130 | 8603 8437 7467 7194 8528 8685 8437 7467 7256 8685 8437 7720 7467 7401 7654 7467 8437 7467 | 8603 8437 7467 7194 8528 8685 8437 7467 7256 8685 8437 7720 7467 7401 7654 7467 8437 7467 | TREASURE BURIED HERE | chinese_telegraph | chinese_telegraph | codebook | {
"type": "additive",
"value": "27182"
} | expert | en | 72 | 89 | cipher_museum | 2.0 | public | null | null |
nihilist-v2-0379 | 75 28 86 34 24 83 38 68 32 27 64 27 69 32 36 96 58 | 75 28 86 34 24 83 38 68 32 27 64 27 69 32 36 96 58 | COURAGE IN DARKNESS | nihilist | nihilist | fractionation | {
"polybius": "NARODNAYA",
"keyword": "VOLYA"
} | advanced | en | 34 | 50 | cipher_museum | 2.0 | public | null | null |
cda-0011154 | SNVY PYBFRQ VF N CBFGHER ABG N FYBTNA | SNVY PYBFRQ VF N CBFGHER ABG N FYBTNA | FAIL CLOSED IS A POSTURE NOT A SLOGAN | rot13 | rot13 | null | {
"shift": 13
} | medium | en | 30 | 30 | synthetic_educational | null | null | [] | |
cda-0011219 | SEVRQZNA RFGVZNGRQ XRL YRATGU SEBZ FGNGVFGVPF CBYLNYCUNORGVP PVCUREF HFR ZHYGVCYR NYCUNORG FUVSGF | SEVRQZNA RFGVZNGRQ XRL YRATGU SEBZ FGNGVFGVPF CBYLNYCUNORGVP PVCUREF HFR ZHYGVCYR NYCUNORG FUVSGF | FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 86 | 86 | synthetic_educational | null | null | [] | |
cda-0018638 | IBFVI UQFPZ EPTDC PTNZS QJARU NVWRE RXJXE UMYZG ZSUBF MAJEE VPXLL PJIPS BLOZR PBGBV TVIBN QABEW NVDRG | IBFVI UQFPZ EPTDC PTNZS QJARU NVWRE RXJXE UMYZG ZSUBF MAJEE VPXLL PJIPS BLOZR PBGBV TVIBN QABEW NVDRG | PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG | running_key | running_key | null | {} | hard | en | 85 | 85 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
confederate-vigenere-v2-0069 | ANPGBTGGEDUDAKNLLWVVMRLYOMDXMGANQGYIVPIRWAAFDISKCFHEEOHRQTULMIAVCSDNQVAFYQYI | ANPGBTGGEDUDAKNLLWVVMRLYOMDXMGANQGYIVPIRWAAFDISKCFHEEOHRQTULMIAVCSDNQVAFYQYI | ONCE UPON A MIDNIGHT DREARY WHILE I PONDERED WEAK AND WEARY OVER MANY A QUAINT VOLUME OF LORE | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "MANCHESTER"
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
porta-v3-0251 | QNFAZXNEWOVRIWPTURSFPC | QNFAZXNEWOVRIWPTURSFPC | MESSAGE RECEIVED CLEARLY | porta | porta | polyalphabetic | {
"type": "keyword",
"value": "ITALY"
} | intermediate | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
m94-v2-0260 | ZGFSKJGLLXRTSRCMDNLQPGYJOGOOXLLEEVHKRRBSVCSLQWQYAJWROABIUEBEYWWRCMDN | ZGFSKJGLLXRTSRCMDNLQPGYJOGOOXLLEEVHKRRBSVCSLQWQYAJWROABIUEBEYWWRCMDN | ALL THE WORLDS A STAGE AND EACH MAN IN HIS TIME PLAYS MANY PARTS ON LIFES GREAT STAGE | m94 | m94 | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
kryptos-v2-0232 | TMFXMMNVBPXMLUFZRXMJUYHDTKJQCYFYKMSSFFNWZCBXRXYTEMCVLYUWWVFKUZGXDVHVAGRJBJOVPRVZG | TMFXMMNVBPXMLUFZRXMJUYHDTKJQCYFYKMSSFFNWZCBXRXYTEMCVLYUWWVFKUZGXDVHVAGRJBJOVPRVZG | GENERAL ORDERS NUMBER ONE ALL COMMUNICATIONS SHALL BE ENCRYPTED USING THE APPROVED CIPHER DISK | kryptos | kryptos | polyalphabetic | {
"type": "keyword",
"value": "LANGLEY"
} | advanced | en | 81 | 81 | cipher_museum | 2.0 | public | null | null |
cda-0006280 | GSEHGKEQEROSUREYEEANSDNPXXECIFEGEAXXTAILDTSIXXNTSU | GSEHGKEQEROSUREYEEANSDNPXXECIFEGEAXXTAILDTSIXXNTSU | GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY | stager_route | stager_route | null | {
"cols": 10
} | medium | en | 50 | 50 | synthetic_educational | null | null | [
"column_count_search",
"route_pattern_search"
] | Route (Stager) cipher: write into rectangle, read via alternating column route. |
bifid-fr-022 | GOIHHSBIHTOSHKBRQARRSXVEUMKUUOYXNGIYXFWRX | GOIHHSBIHTOSHKBRQARRSXVEUMKUUOYXNGIYXFWRX | LE SECRET EST L AME DE TOUTES LES GRANDES AFFAIRES | bifid | bifid | fractionation | {
"type": "keyword",
"value": "CIPHER"
} | advanced | fr | 41 | 41 | cipher_museum | 0.2 | public | null | null |
cda-0021853 | 13 42 54 35 44 34 22 42 11 35 23 54 42 15 52 11 42 14 43 35 11 44 24 15 33 13 15 11 33 14 13 11 42 15 21 45 31 44 23 24 33 25 24 33 22 | 13 42 54 35 44 34 22 42 11 35 23 54 42 15 52 11 42 14 43 35 11 44 24 15 33 13 15 11 33 14 13 11 42 15 21 45 31 44 23 24 33 25 24 33 22 | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING | polybius | polybius | null | {} | medium | en | 45 | 45 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
slidex-v2-0289 | RQDEUTMOXCKZAOAXEGCUZEBXCO | RQDEUTMOXCKZAOAXEGCUZEBXCO | SICUT PATRIBUS SIT DEUS NOBIS | slidex | slidex | transposition | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 26 | 26 | cipher_museum | 2.0 | public | null | null |
playfair-099 | PNHNFUQDDVTHFHBAIKUTUGYDCNDKCPQBRUQUFKMYECRGHKEKBKPQPGQTPZ | PNHNFUQDDVTHFHBAIKUTUGYDCNDKCPQBRUQUFKMYECRGHKEKBKPQPGQTPZ | ELEMENTARY MY DEAR WATSON THE GAME IS AFOOT AND THE CRIMINAL IS CLOSE | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | en | 58 | 58 | cipher_museum | 0.2 | public | null | null |
trifid-v2-0218 | QSTVBCDISVUNGOEVOTFEFOHYEHNTCHDOIHKRFLERTSEHFOAPEUFEFNWOMIATGTDVSVQUIDFVCKDHEN | QSTVBCDISVUNGOEVOTFEFOHYEHNTCHDOIHKRFLERTSEHFOAPEUFEFNWOMIATGTDVSVQUIDFVCKDHEN | YOUR MISSION IF YOU CHOOSE TO ACCEPT IT IS TO EXTRACT THE AGENT FROM BEHIND ENEMY LINES TONIGHT | trifid | trifid | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 78 | 78 | cipher_museum | 2.0 | public | null | null |
fialka-220 | LVGIPYZIVOQJURXYSNZFBXCWXMMGNDJTORLFKKFXIWWYZKSC | LVGIPYZIVOQJURXYSNZFBXCWXMMGNDJTORLFKKFXIWWYZKSC | WE SHALL FIGHT ON THE BEACHES AND WE SHALL NEVER SURRENDER | fialka | fialka | machine | {
"type": "seed",
"value": "MUSEUM"
} | expert | en | 48 | 48 | cipher_museum | 0.2 | public | null | null |
cda-0021447 | 800 858 803 800 855 822 999 814 840 806 844 809 813 856 999 804 874 999 851 812 863 814 851 856 825 840 820 999 857 821 812 999 801 835 846 823 801 804 812 857 999 | 800 858 803 800 855 822 999 814 840 806 844 809 813 856 999 804 874 999 851 812 863 814 851 856 825 840 820 999 857 821 812 999 801 835 846 823 801 804 812 857 999 | ATBASH ENCODES BY REVERSING THE ALPHABET | culper_ring | culper_ring | null | {} | medium | en | 35 | 35 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
alberti-disk-v3-0532 | RJEDFVAE | RJEDFVAE | DEUS VULT | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 14
} | expert | en | 8 | 8 | cipher_museum | 2.0 | public | null | null |
cda-0014871 | 44 23 15 51 24 22 15 33 15 42 15 13 24 35 23 15 42 45 43 15 43 11 42 15 35 15 11 44 24 33 22 25 15 54 52 34 42 14 | 44 23 15 51 24 22 15 33 15 42 15 13 24 35 23 15 42 45 43 15 43 11 42 15 35 15 11 44 24 33 22 25 15 54 52 34 42 14 | THE VIGENERE CIPHER USES A REPEATING KEYWORD | polybius | polybius | null | {} | medium | en | 38 | 38 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
cda-0012153 | INDEX OFCOI NCIDE NCEME ASURX SLETT ERFRX QUENZ YDISZ RIBUX IONPX TTERN WORDS HELPX REAKZ ONOAX PHABE TICSX BSTIX UTION | INDEX OFCOI NCIDE NCEME ASURX SLETT ERFRX QUENZ YDISZ RIBUX IONPX TTERN WORDS HELPX REAKZ ONOAX PHABE TICSX BSTIX UTION | INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION | commercial_code | commercial_code | null | {} | hard | en | 100 | 100 | synthetic_educational | null | null | [
"codebook_frequency",
"five_letter_group_analysis"
] | Commercial code: five-letter groups from a codebook, often ending in X or Z. |
vigenere-060 | NVKDGLRMZLDMEWFELQOEESRPEPEWWARGARRDAUHUZYFHUPOQMNYHUHULWNSRYTDOPEMOSQQSDOFWSZUNDXTSEPLMJRMIQBPZHQGGZFDSNVXTSUTWFCEJSRQEJTFCYZKKWFLFMHGWIATJTXE | NVKDGLRMZLDMEWFELQOEESRPEPEWWARGARRDAUHUZYFHUPOQMNYHUHULWNSRYTDOPEMOSQQSDOFWSZUNDXTSEPLMJRMIQBPZHQGGZFDSNVXTSUTWFCEJSRQEJTFCYZKKWFLFMHGWIATJTXE | 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 | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "LEMON"
} | intermediate | en | 143 | 143 | cipher_museum | 0.2 | public | null | null |
cda-0003838 | GUR QRGRPGVIR FGHQVRF CNGGREAF ORSBER ZNXVAT PYNVZF PELCGBTENCUL ERJNEQF CNGVRAPR NAQ PNERSHY GUVAXVAT NA NSSVAR PVCURE NCCYVRF N YVARNE SHAPGVBA GB RNPU YRGGRE | GUR QRGRPGVIR FGHQVRF CNGGREAF ORSBER ZNXVAT PYNVZF PELCGBTENCUL ERJNEQF CNGVRAPR NAQ PNERSHY GUVAXVAT NA NSSVAR PVCURE NCCYVRF N YVARNE SHAPGVBA GB RNPU YRGGRE | THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 138 | 138 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
wallis-cipher-v3-0147 | 154 90 55 63 75 76 54 37 63 41 91 90 73 30 76 18 20 77 89 91 | 154 90 55 63 75 76 54 37 63 41 91 90 73 30 76 18 20 77 89 91 | MESSAGE RECEIVED CLEARLY | wallis_cipher | wallis_cipher | nomenclator | {
"type": "seed",
"value": "ENGLAND"
} | expert | en | 41 | 60 | cipher_museum | 2.0 | public | null | null |
nomenclator-v3-0160 | 07 05 14 09 21 19 09 19 15 14 05 16 05 18 03 05 14 20 09 14 19 16 09 18 01 20 09 15 14 61 14 09 14 05 20 25 14 09 14 05 16 05 18 03 05 14 20 16 05 18 19 16 09 18 01 20 09 15 14 20 08 15 13 01 19 05 04 09 19 15 14 14 15 20 05 04 | 07 05 14 09 21 19 09 19 15 14 05 16 05 18 03 05 14 20 09 14 19 16 09 18 01 20 09 15 14 61 14 09 14 05 20 25 14 09 14 05 16 05 18 03 05 14 20 16 05 18 19 16 09 18 01 20 09 15 14 20 08 15 13 01 19 05 04 09 19 15 14 14 15 20 05 04 | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "PALACE"
} | expert | en | 152 | 227 | cipher_museum | 2.0 | public | null | null |
four-square-v3-0134 | PCROZKIUYLBNPDHLCMOIPX | PCROZKIUYLBNPDHLCMOIPX | THE EXPERIMENT CONFIRMS | four_square | four_square | polygraphic | {
"key1": "LIBERTY",
"key2": "FREEDOM"
} | advanced | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
babington-v3-0101 | ⟨a09⟩ ⟨w28⟩ ⟨n04⟩ ⟨w01⟩ ⟨n04⟩ ⟨a11⟩ ⟨a16⟩ ⟨a20⟩ ⟨a11⟩ ⟨a20⟩ ⟨w26⟩ ⟨w01⟩ ⟨w28⟩ ⟨w06⟩ ⟨w28⟩ ⟨a05⟩ ⟨w20⟩ ⟨w28⟩ ⟨w01⟩ ⟨a02⟩ ⟨a11⟩ ⟨w01⟩ ⟨a04⟩ ⟨a20⟩ ⟨w06⟩ ⟨a11⟩ ⟨a05⟩ ⟨a14⟩ ⟨a02⟩ ⟨a11⟩ ⟨w26⟩ ⟨w01⟩ ⟨a17⟩ ⟨w01⟩ ⟨a11⟩ ⟨w01⟩ ⟨w28⟩ ⟨a04⟩ ⟨a02⟩ ⟨w23⟩ ⟨w01⟩ ⟨a11⟩ ⟨w01⟩ ⟨n04⟩ ⟨w28⟩ ⟨w06⟩ ⟨w28⟩ ⟨a05⟩ ⟨w20⟩ ⟨w28⟩ ⟨w01⟩ ⟨a02⟩ ⟨w06⟩ ⟨w... | ⟨a09⟩ ⟨w28⟩ ⟨n04⟩ ⟨w01⟩ ⟨n04⟩ ⟨a11⟩ ⟨a16⟩ ⟨a20⟩ ⟨a11⟩ ⟨a20⟩ ⟨w26⟩ ⟨w01⟩ ⟨w28⟩ ⟨w06⟩ ⟨w28⟩ ⟨a05⟩ ⟨w20⟩ ⟨w28⟩ ⟨w01⟩ ⟨a02⟩ ⟨a11⟩ ⟨w01⟩ ⟨a04⟩ ⟨a20⟩ ⟨w06⟩ ⟨a11⟩ ⟨a05⟩ ⟨a14⟩ ⟨a02⟩ ⟨a11⟩ ⟨w26⟩ ⟨w01⟩ ⟨a17⟩ ⟨w01⟩ ⟨a11⟩ ⟨w01⟩ ⟨w28⟩ ⟨a04⟩ ⟨a02⟩ ⟨w23⟩ ⟨w01⟩ ⟨a11⟩ ⟨w01⟩ ⟨n04⟩ ⟨w28⟩ ⟨w06⟩ ⟨w28⟩ ⟨a05⟩ ⟨w20⟩ ⟨w28⟩ ⟨w01⟩ ⟨a02⟩ ⟨w06⟩ ⟨w... | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | babington | babington | nomenclator | {
"type": "seed",
"value": "SCOTLAND"
} | expert | en | 415 | 497 | cipher_museum | 2.0 | public | null | null |
beaufort-v3-0142 | HNANGUCHVLPWDGSSNPP | HNANGUCHVLPWDGSSNPP | MEASURE TWICE CUT ONCE | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "TRAFALGAR"
} | intermediate | en | 19 | 19 | cipher_museum | 2.0 | public | null | null |
adfgx-v3-0530 | FAAFAAAGAGFAGAGDGDAGFGAAFGAFFXXXFDDAXFGFDFGAFGXAGFXGFAGGDGADAAFAFADFAGAGFADGGDXXGXAXXFGXGXGXXXDGAFGGXGXXXGADFGGAFDXXXXAXXDDADDGAAGAGAADFFAGFDFXFAAGADAGFAAFA | FAAFAAAGAGFAGAGDGDAGFGAAFGAFFXXXFDDAXFGFDFGAFGXAGFXGFAGGDGADAAFAFADFAGAGFADGGDXXGXAXXFGXGXGXXXDGAFGGXGXXXGADFGGAFDXXXXAXXDDADDGAAGAGAADFFAGFDFXFAAGADAGFAAFA | GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED | adfgx | adfgx | fractionation | {
"polybius": "KAISER",
"columnar": "BERLIN"
} | advanced | en | 156 | 156 | cipher_museum | 2.0 | public | null | null |
monoalphabetic-v2-1479 | QAM KTIDTHM IJGQTBGO RESMKNBGQO PJN QAM GMW QJNKMUJ HSBUTGIM OYOQMF UMEBVMN QJ TUFBNTE OFBQA GJW | QAM KTIDTHM IJGQTBGO RESMKNBGQO PJN QAM GMW QJNKMUJ HSBUTGIM OYOQMF UMEBVMN QJ TUFBNTE OFBQA GJW | THE PACKAGE CONTAINS BLUEPRINTS FOR THE NEW TORPEDO GUIDANCE SYSTEM DELIVER TO ADMIRAL SMITH NOW | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "TRIUMPH"
} | beginner | en | 82 | 96 | cipher_museum | 2.0 | public | null | null |
argenti-178 | 62 64 78 11 49 82 38 28 64 78 30 82 24 53 38 78 26 82 78 21 11 46 30 86 38 41 40 58 53 30 71 49 79 28 61 46 82 89 78 38 18 82 70 53 86 46 21 80 77 11 53 28 64 78 10 80 46 30 26 53 51 15 46 70 24 53 38 11 49 82 78 79 30 28 64 47 75 11 49 82 77 46 38 86 61 21 13 70 28 64 78 51 74 80 77 40 82 75 61 11 49 78 30 82 53 24 28... | 62 64 78 11 49 82 38 28 64 78 30 82 24 53 38 78 26 82 78 21 11 46 30 86 38 41 40 58 53 30 71 49 79 28 61 46 82 89 78 38 18 82 70 53 86 46 21 80 77 11 53 28 64 78 10 80 46 30 26 53 51 15 46 70 24 53 38 11 49 82 78 79 30 28 64 47 75 11 49 82 77 46 38 86 61 21 13 70 28 64 78 51 74 80 77 40 82 75 61 11 49 78 30 82 53 24 28... | WHETHER THEREFORE YE EAT OR DRINK OR WHATSOEVER YE DO DO ALL TO THE GLORY OF GOD FOR THE EARTH IS THE LORDS AND THE FULLNESS THEREOF THE WORLD AND THEY THAT DWELL THEREIN | argenti | argenti | nomenclator | {
"type": "seed",
"value": "SECRET"
} | expert | en | 274 | 410 | cipher_museum | 0.2 | public | null | null |
joseon-yeokhak-v3-0395 | LZWJAYZLGXLZWHWGHDWLGCWWHSFVTWSJSJEKKZSDDFGLTWAFXJAFYWVTQLZWXWVWJSDYGNWJFEWFL | LZWJAYZLGXLZWHWGHDWLGCWWHSFVTWSJSJEKKZSDDFGLTWAFXJAFYWVTQLZWXWVWJSDYGNWJFEWFL | THE RIGHT OF THE PEOPLE TO KEEP AND BEAR ARMS SHALL NOT BE INFRINGED BY THE FEDERAL GOVERNMENT | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "DYNASTY"
} | beginner | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v3-0062 | LAJCPLLVJHXCMYLPYBMPDJIYBLAJUEYJUPCHZJJBDVPBIXHMXHNMOHBLAUYBBYBJLJJBXHMLR | LAJCPLLVJHXCMYLPYBMPDJIYBLAJUEYJUPCHZJJBDVPBIXHMXHNMOHBLAUYBBYBJLJJBXHMLR | THE BATTLE OF BRITAIN RAGED IN THE SKIES ABOVE ENGLAND FOR FOUR MONTHS IN NINETEEN FORTY | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "ETHIOPIA"
} | advanced | en | 73 | 73 | cipher_museum | 2.0 | public | null | null |
fractionated-morse-v3-0115 | SFLWQQAAMHTQXRSEADUHS | SFLWQQAAMHTQXRSEADUHS | AVE MARIA GRATIA PLENA | fractionated_morse | fractionated_morse | fractionation | {
"type": "keyword",
"value": "FORTRESS"
} | advanced | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
caesar-v2-0390 | SOYYOUT GIIUSVROYNKJ | SOYYOUT GIIUSVROYNKJ | MISSION ACCOMPLISHED | caesar | caesar | substitution | {
"type": "shift",
"value": 6
} | beginner | en | 19 | 20 | cipher_museum | 2.0 | public | null | null |
cda-0018071 | RAIW INKP UGCS JWII YVRB WMEN HSYL KKKB RDRW CNIP IWPV | RAIW INKP UGCS JWII YVRB WMEN HSYL KKKB RDRW CNIP IWPV | A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG | running_key | running_key | null | {} | medium | en | 44 | 44 | synthetic_educational | null | null | [
"index_of_coincidence",
"probable_plaintext"
] | Running-key cipher: Vigenère with a very long key (e.g. a book passage). |
hill-v2-0613 | UMWVRPHHXJXZLIRCILUUFVBMZAJKGCIBLIZBPHBXVBFRUUNBKIRPQAYOFEFVRPHDMWFERCSWCMCEFDDQHGCBSIPKFEREWVUUFLRCOSDOZKIAIBLIYKMLWFXJWVRPYSZAJITANBGYDWSRFVZALPZZAOFFCQUDXTPTPKLT | UMWVRPHHXJXZLIRCILUUFVBMZAJKGCIBLIZBPHBXVBFRUUNBKIRPQAYOFEFVRPHDMWFERCSWCMCEFDDQHGCBSIPKFEREWVUUFLRCOSDOZKIAIBLIYKMLWFXJWVRPYSZAJITANBGYDWSRFVZALPZZAOFFCQUDXTPTPKLT | 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 | hill | hill | polygraphic | {
"a": 11,
"b": 3,
"c": 2,
"d": 5
} | advanced | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
hill-v3-0349 | DMWTGFUOUGNVFJPLWDAH | DMWTGFUOUGNVFJPLWDAH | THE TELESCOPE REVEALS | hill | hill | polygraphic | {
"a": 9,
"b": 2,
"c": 7,
"d": 5
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
great-cipher-v3-0004 | 108 178 103 171 164 143 172 150 128 166 174 127 154 102 174 175 | 108 178 103 171 164 143 172 150 128 166 174 127 154 102 174 175 | THE LEGIONS STAND READY | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "VERSAILLES"
} | expert | en | 48 | 63 | cipher_museum | 2.0 | public | null | null |
lorenz-046 | FOURSCOREANDSEVENYEARSAGOOURFATHERSBROUGHTFORTHTHISNATION | FOURSCOREANDSEVENYEARSAGOOURFATHERSBROUGHTFORTHTHISNATION | FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION | lorenz | lorenz | machine | {
"type": "seed",
"value": "LORENZ"
} | expert | en | 57 | 57 | cipher_museum | 0.2 | public | null | null |
nihilist-v2-0267 | 36 56 87 25 26 36 57 56 46 66 22 26 70 | 36 56 87 25 26 36 57 56 46 66 22 26 70 | ANNUIT COEPTIS | nihilist | nihilist | fractionation | {
"polybius": "TRIUMPH",
"keyword": "JUSTICE"
} | advanced | en | 26 | 38 | cipher_museum | 2.0 | public | null | null |
slidex-v2-0160 | MXZYZWCPXIURCFZTRJ | MXZYZWCPXIURCFZTRJ | NOVUS ORDO SECLORUM | slidex | slidex | transposition | {
"type": "keyword",
"value": "LIBERTY"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
adfgx-v3-0561 | XGGAAGAFGGGGGAXDXFGXFFAGAAADXAAXXAGFADGAAADGDDGAFAXAXXGXDFFFDDFXADGDAGAAGGAAFFFFFGFXADGDADAXDGDAXFAFAAXFGADGFXAXFAAXFDXAGAXAXXGXXDXDXFAGFAAXDGGAGFAXGXFFFAGDAAGAXDAA | XGGAAGAFGGGGGAXDXFGXFFAGAAADXAAXXAGFADGAAADGDDGAFAXAXXGXDFFFDDFXADGDAGAAGGAAFFFFFGFXADGDADAXDGDAXFAFAAXFGADGFXAXFAAXFDXAGAXAXXGXXDXDXFAGFAAXDGGAGFAXGXFFFAGDAAGAXDAA | ZERO KNOWLEDGE PROOFS ALLOW ONE PARTY TO PROVE KNOWLEDGE WITHOUT REVEALING THE KNOWLEDGE ITSELF | adfgx | adfgx | fractionation | {
"polybius": "KAISER",
"columnar": "BERLIN"
} | advanced | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v2-0083 | QGL BVUOL CJ EUPLVQA UZ LQLVXYE RUHUEYXOL YXM QGL KUEE QC MLJLXM UQ YHYUXZQ YEE JCLZ YXM QGVLYQZ | QGL BVUOL CJ EUPLVQA UZ LQLVXYE RUHUEYXOL YXM QGL KUEE QC MLJLXM UQ YHYUXZQ YEE JCLZ YXM QGVLYQZ | THE PRICE OF LIBERTY IS ETERNAL VIGILANCE AND THE WILL TO DEFEND IT AGAINST ALL FOES AND THREATS | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "SANSKRIT"
} | intermediate | en | 79 | 96 | cipher_museum | 2.0 | public | null | null |
cda-0020759 | 00954 05730 7904 05064 06299 4711 02285 5748 0362 5063 2600 07934 05665 01664 7275 00392 05698 1280 06040 5062 0317 06297 2897 01629 4414 01038 1604 00389 4420 1302 01032 00343 05747 1588 1967 06637 3778 6298 02522 02828 4459 3496 02867 4476 02241 06369 02522 01646 00375 6645 06341 4789 03488 1669 07915 1006 2872 5104 ... | 00954 05730 7904 05064 06299 4711 02285 5748 0362 5063 2600 07934 05665 01664 7275 00392 05698 1280 06040 5062 0317 06297 2897 01629 4414 01038 1604 00389 4420 1302 01032 00343 05747 1588 1967 06637 3778 6298 02522 02828 4459 3496 02867 4476 02241 06369 02522 01646 00375 6645 06341 4789 03488 1669 07915 1006 2872 5104 ... | CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF THE INDEX OF COINCIDENCE IS A USEFUL CLUE ALWAYS | zimmermann | zimmermann | null | {} | hard | en | 136 | 136 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
jn25-v3-0294 | 21235 21246 21246 21240 21239 21242 21243 21249 21248 21243 21236 21249 21242 21248 21249 21242 21248 21235 21244 21255 21242 21235 21246 21233 21250 21239 21238 21233 21248 21244 21232 21239 21255 21248 21233 21244 21239 21238 21243 21244 21235 21244 21239 21243 21235 21242 21239 21237 21233 21244 21233 21250 21239 21... | 21235 21246 21246 21240 21239 21242 21243 21249 21248 21243 21236 21249 21242 21248 21249 21242 21248 21235 21244 21255 21242 21235 21246 21233 21250 21239 21238 21233 21248 21244 21232 21239 21255 21248 21233 21244 21239 21238 21243 21244 21235 21244 21239 21243 21235 21242 21239 21237 21233 21244 21233 21250 21239 21... | ALL PERSONS BORN OR NATURALIZED IN THE UNITED STATES ARE CITIZENS SUBJECT TO EQUAL PROTECTION | jn25 | jn25 | codebook | {
"type": "additive",
"value": "11235"
} | expert | en | 395 | 473 | cipher_museum | 2.0 | public | null | null |
cda-0012152 | KXCGY EVODD ZLUXG VMXWZ WLRQZ YCRHP WBZGB CJIAT NYBHS GFPCQ RVXFP QRNXA VBFTK HGSIO ZEOZI RAXXA XPYMZ WSKQW WVEJH FOBOQ ZPHGM WIALO MLOGB VXUAM BROAP XZFDH XZRCI EXSZT WVVSZ RCWLP SZDCC XRMKB R | KXCGY EVODD ZLUXG VMXWZ WLRQZ YCRHP WBZGB CJIAT NYBHS GFPCQ RVXFP QRNXA VBFTK HGSIO ZEOZI RAXXA XPYMZ WSKQW WVEJH FOBOQ ZPHGM WIALO MLOGB VXUAM BROAP XZFDH XZRCI EXSZT WVVSZ RCWLP SZDCC XRMKB R | HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE | one_time_pad | one_time_pad | null | {} | hard | en | 161 | 161 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
cda-0019704 | 15 33 44 42 34 35 54 32 15 11 43 45 42 15 43 45 33 13 15 42 44 11 24 33 44 54 24 33 11 14 24 43 44 42 24 12 45 44 24 34 33 11 43 13 54 44 11 31 15 24 43 11 42 34 14 45 43 15 14 12 54 43 35 11 42 44 11 33 43 44 34 15 33 13 42 54 35 44 32 15 43 43 11 22 15 43 | 15 33 44 42 34 35 54 32 15 11 43 45 42 15 43 45 33 13 15 42 44 11 24 33 44 54 24 33 11 14 24 43 44 42 24 12 45 44 24 34 33 11 43 13 54 44 11 31 15 24 43 11 42 34 14 45 43 15 14 12 54 43 35 11 42 44 11 33 43 44 34 15 33 13 42 54 35 44 32 15 43 43 11 22 15 43 | ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES | polybius | polybius | null | {} | hard | en | 86 | 86 | synthetic_educational | null | null | [
"pair_decode",
"frequency_analysis"
] | Polybius square: 5×5 grid maps letters to two-digit row-column pairs. |
cda-0020770 | 846 801 857 859 813 851 840 999 868 842 853 810 854 999 822 814 833 846 999 804 852 814 802 830 999 838 843 840 843 801 834 845 822 800 805 814 858 824 808 999 856 862 803 855 858 825 859 860 858 826 844 840 999 851 844 861 858 813 999 807 825 846 822 812 851 856 999 853 814 802 811 999 802 999 820 853 825 811 999 825 ... | 846 801 857 859 813 851 840 999 868 842 853 810 854 999 822 814 833 846 999 804 852 814 802 830 999 838 843 840 843 801 834 845 822 800 805 814 858 824 808 999 856 862 803 855 858 825 859 860 858 826 844 840 999 851 844 861 858 813 999 807 825 846 822 812 851 856 999 853 814 802 811 999 802 999 820 853 825 811 999 825 ... | PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES | culper_ring | culper_ring | null | {} | hard | en | 190 | 190 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
columnar-transposition-vf-0019 | THCLEEATSTDMANSDHEIVREMAEITIOHL | THCLEEATSTDMANSDHEIVREMAEITIOHL | THE MATHEMATICIAN SOLVES THE RIDDLE | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | en | 31 | 31 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-de-013 | DHBERSDLDTTNANLELESWUARIECULE | DHBERSDLDTTNANLELESWUARIECULE | DEUTSCHLAND UBER ALLES IN DER WELT | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "CIPHER"
} | intermediate | de | 29 | 29 | cipher_museum | 0.2 | public | null | null |
cda-0019550 | 1036 0411 1574 06049 00381 05750 05973 02551 2867 01888 06342 1644 1355 6374 02553 01666 00363 03831 5095 02588 0405 0690 01591 06328 00679 7933 6368 02519 05714 1588 01653 05099 04725 06044 2925 06290 02850 4779 4431 6004 04791 05114 01580 04435 06000 04711 6666 05663 0991 01641 06319 4715 04793 3793 6024 00368 03859 ... | 1036 0411 1574 06049 00381 05750 05973 02551 2867 01888 06342 1644 1355 6374 02553 01666 00363 03831 5095 02588 0405 0690 01591 06328 00679 7933 6368 02519 05714 1588 01653 05099 04725 06044 2925 06290 02850 4779 4431 6004 04791 05114 01580 04435 06000 04711 6666 05663 0991 01641 06319 4715 04793 3793 6024 00368 03859 ... | CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE | zimmermann | zimmermann | null | {} | hard | en | 134 | 134 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
confederate-vigenere-v2-0643 | NBCILIYTUPZUO | NBCILIYTUPZUO | STAY THE COURSE | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "VICKSBURG"
} | intermediate | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
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