id stringlengths 7 52 | text stringlengths 6 2.11k | ciphertext stringlengths 6 2.11k | plaintext stringlengths 6 282 | label stringclasses 81
values | cipher stringclasses 81
values | cipher_family stringclasses 13
values | key unknown | difficulty stringclasses 7
values | language stringclasses 8
values | text_length int64 6 1.09k | length int64 6 1.28k | source stringclasses 2
values | dataset_version stringclasses 2
values | split stringclasses 1
value | attack_methods listlengths 0 3 ⌀ | educational_note stringclasses 32
values |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
cda-0021783 | ⟨a23⟩ ⟨w08⟩ ⟨w32⟩ ⟨a01⟩ ⟨w14⟩ ⟨a01⟩ ⟨w10⟩ ⟨w22⟩ ⟨w20⟩ ⟨a17⟩ ⟨w32⟩ ⟨w22⟩ ⟨w08⟩ ⟨a13⟩ ⟨w10⟩ ⟨w22⟩ ⟨a25⟩ ⟨w28⟩ ⟨a19⟩ ⟨w20⟩ ⟨a07⟩ ⟨w10⟩ ⟨a25⟩ ⟨w08⟩ ⟨w22⟩ ⟨a01⟩ ⟨w10⟩ ⟨w26⟩ ⟨w08⟩ ⟨a07⟩ ⟨a13⟩ ⟨w20⟩ ⟨a19⟩ ⟨a29⟩ ⟨w08⟩ ⟨a13⟩ ⟨w22⟩ | ⟨a23⟩ ⟨w08⟩ ⟨w32⟩ ⟨a01⟩ ⟨w14⟩ ⟨a01⟩ ⟨w10⟩ ⟨w22⟩ ⟨w20⟩ ⟨a17⟩ ⟨w32⟩ ⟨w22⟩ ⟨w08⟩ ⟨a13⟩ ⟨w10⟩ ⟨w22⟩ ⟨a25⟩ ⟨w28⟩ ⟨a19⟩ ⟨w20⟩ ⟨a07⟩ ⟨w10⟩ ⟨a25⟩ ⟨w08⟩ ⟨w22⟩ ⟨a01⟩ ⟨w10⟩ ⟨w26⟩ ⟨w08⟩ ⟨a07⟩ ⟨a13⟩ ⟨w20⟩ ⟨a19⟩ ⟨a29⟩ ⟨w08⟩ ⟨a13⟩ ⟨w22⟩ | FAIL CLOSED IS A POSTURE NOT A SLOGAN PERHAPS | babington | babington | null | {} | medium | en | 37 | 37 | synthetic_educational | null | null | [
"nomenclator_frequency",
"symbol_mapping"
] | Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot. |
nomenclator-v3-0297 | 18 19 01 05 14 03 18 25 16 20 09 15 14 18 05 12 09 05 19 15 14 60 13 01 20 08 05 13 01 20 09 03 01 12 04 09 06 06 09 03 21 12 20 25 62 06 01 03 20 15 18 09 14 07 60 16 18 15 04 21 03 20 62 20 23 15 12 01 18 07 05 16 18 09 13 05 19 | 18 19 01 05 14 03 18 25 16 20 09 15 14 18 05 12 09 05 19 15 14 60 13 01 20 08 05 13 01 20 09 03 01 12 04 09 06 06 09 03 21 12 20 25 62 06 01 03 20 15 18 09 14 07 60 16 18 15 04 21 03 20 62 20 23 15 12 01 18 07 05 16 18 09 13 05 19 | RSA ENCRYPTION RELIES ON THE MATHEMATICAL DIFFICULTY OF FACTORING THE PRODUCT OF TWO LARGE PRIMES | nomenclator | nomenclator | nomenclator | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 154 | 230 | cipher_museum | 2.0 | public | null | null |
nihilist-v2-0322 | 24 36 77 35 36 49 45 55 48 56 54 55 46 73 56 25 56 54 36 70 77 36 59 90 24 55 48 43 45 58 59 43 45 67 64 54 27 100 34 37 57 43 35 66 68 56 27 67 57 56 65 77 23 45 56 56 67 47 57 34 55 50 45 58 66 68 52 58 38 74 47 36 68 26 26 67 43 26 29 77 | 24 36 77 35 36 49 45 55 48 56 54 55 46 73 56 25 56 54 36 70 77 36 59 90 24 55 48 43 45 58 59 43 45 67 64 54 27 100 34 37 57 43 35 66 68 56 27 67 57 56 65 77 23 45 56 56 67 47 57 34 55 50 45 58 66 68 52 58 38 74 47 36 68 26 26 67 43 26 29 77 | THE BABINGTON PLOT TO ASSASSINATE QUEEN ELIZABETH WAS UNCOVERED BY FRANCIS WALSINGHAM IN TIME | nihilist | nihilist | fractionation | {
"polybius": "TRIUMPH",
"keyword": "JUSTICE"
} | advanced | en | 161 | 240 | cipher_museum | 2.0 | public | null | null |
caesar-v2-0228 | NKDGTVÉ ÉICNKVÉ HTCVGTPKVÉ QW NC OQTV EGU OQVU FÉHKPKUUGPV NC TGXQNWVKQP HTCPÇCKUG FG OKN UGRV | NKDGTVÉ ÉICNKVÉ HTCVGTPKVÉ QW NC OQTV EGU OQVU FÉHKPKUUGPV NC TGXQNWVKQP HTCPÇCKUG FG OKN UGRV | LIBERTÉ ÉGALITÉ FRATERNITÉ OU LA MORT CES MOTS DÉFINISSENT LA REVOLUTION FRANÇAISE DE MIL SEPT | caesar | caesar | substitution | {
"type": "shift",
"value": 2
} | beginner | en | 80 | 94 | cipher_museum | 2.0 | public | null | null |
vic-v3-0033 | 954868480807117280 | 954868480807117280 | YANKEE DOODLE | vic | vic | substitution | {
"type": "keyword",
"value": "HOLLOW"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
alberti-disk-v3-0663 | VOKKHDPEACLXGPWDNBUDT | VOKKHDPEACLXGPWDNBUDT | THE EXPERIMENT CONFIRMS | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 16
} | expert | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
playfair-v2-0199 | OKRUBPDTROGKDRTEXKDFEFOPDHXGHKHDQAODUAOKOZKGKEEAFOOUBLOCHSHPCFDHGERFABUAOKTFCOBV | OKRUBPDTROGKDRTEXKDFEFOPDHXGHKHDQAODUAOKOZKGKEEAFOOUBLOCHSHPCFDHGERFABUAOKTFCOBV | THE PRICE OF LIBERTY IS ETERNAL VIGILANCE AND THE WILL TO DEFEND IT AGAINST ALL FOES AND THREATS | playfair | playfair | polygraphic | {
"type": "keyword",
"value": "FORTRESS"
} | intermediate | en | 80 | 80 | cipher_museum | 2.0 | public | null | null |
m209-v3-0375 | OQAXBGLYZETSVZCAQMDYMQBRAYAOQYVJAOQOUDPAHEZCBWXLVRKVAWMACMALKLAECONPCVSHBLVPR | OQAXBGLYZETSVZCAQMDYMQBRAYAOQYVJAOQOUDPAHEZCBWXLVRKVAWMACMALKLAECONPCVSHBLVPR | ON D DAY THE ALLIED FORCES LANDED ON FIVE NORMANDY BEACHES IN THE GREATEST SEABORNE INVASION | m209 | m209 | machine | {
"type": "seed",
"value": "VICTORY"
} | expert | en | 77 | 77 | cipher_museum | 2.0 | public | null | null |
geez-monastic-v3-0001 | LAJHMPQVJAPUUTHEJB | LAJHMPQVJAPUUTHEJB | THE ORACLE HAS SPOKEN | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "ETHIOPIA"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
great-cipher-v2-0229 | 173 150 182 179 154 131 114 143 167 119 157 164 114 126 156 160 168 153 119 163 136 182 166 140 103 112 100 107 117 119 101 138 158 127 109 152 119 143 161 179 143 147 178 170 128 140 136 135 169 117 139 128 114 149 151 182 174 142 119 142 180 137 | 173 150 182 179 154 131 114 143 167 119 157 164 114 126 156 160 168 153 119 163 136 182 166 140 103 112 100 107 117 119 101 138 158 127 109 152 119 143 161 179 143 147 178 170 128 140 136 135 169 117 139 128 114 149 151 182 174 142 119 142 180 137 | THE AMBASSADOR HAS RECEIVED OUR MOST URGENT DISPATCHES AND AWAITS INSTRUCTIONS FROM LONDON HQ | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "ROSSIGNOL"
} | expert | en | 186 | 247 | cipher_museum | 2.0 | public | null | null |
red-type-a-v3-0017 | DRIWITRNARUXGHTIIKSU | DRIWITRNARUXGHTIIKSU | THE KING DEMANDS FEALTY | red_type_a | red_type_a | machine | {
"type": "keyword",
"value": "SAKURA"
} | advanced | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
atbash-043 | GSV JFRXP YILDM ULC QFNKH LEVI GSV OZAB WLT MVZI GSV IREVI | GSV JFRXP YILDM ULC QFNKH LEVI GSV OZAB WLT MVZI GSV IREVI | THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG NEAR THE RIVER | atbash | atbash | substitution | {
"type": "none",
"value": null
} | beginner | en | 47 | 58 | cipher_museum | 0.2 | public | null | null |
cda-0020695 | 8 9 12 12 3 9 16 8 5 18 21 19 5 19 12 9 14 5 1 18 1 12 7 5 2 18 1 20 15 5 14 3 18 25 16 20 2 12 15 3 11 19 15 6 12 5 20 20 5 18 19 20 8 5 18 1 9 12 6 5 14 3 5 3 9 16 8 5 18 23 18 9 20 5 19 20 5 24 20 9 14 1 26 9 7 26 1 7 16 1 20 20 5 18 14 20 8 5 4 5 20 5 3 20 9 22 5 19 20 21 4 9 5 19 16 1 20 20 5 18 14 19 2 5 6 15 18 ... | 8 9 12 12 3 9 16 8 5 18 21 19 5 19 12 9 14 5 1 18 1 12 7 5 2 18 1 20 15 5 14 3 18 25 16 20 2 12 15 3 11 19 15 6 12 5 20 20 5 18 19 20 8 5 18 1 9 12 6 5 14 3 5 3 9 16 8 5 18 23 18 9 20 5 19 20 5 24 20 9 14 1 26 9 7 26 1 7 16 1 20 20 5 18 14 20 8 5 4 5 20 5 3 20 9 22 5 19 20 21 4 9 5 19 16 1 20 20 5 18 14 19 2 5 6 15 18 ... | HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS | aeneas_tacticus | aeneas_tacticus | null | {} | hard | en | 140 | 140 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
porta-v2-0410 | OARDDXYFMDMFW | OARDDXYFMDMFW | E PLURIBUS UNUM | porta | porta | polyalphabetic | {
"type": "keyword",
"value": "VENICE"
} | intermediate | en | 13 | 13 | cipher_museum | 2.0 | public | null | null |
cda-0014390 | 802 840 999 802 817 816 825 841 812 999 806 825 845 821 812 851 999 802 847 846 833 824 814 856 999 801 999 834 826 839 812 800 851 999 815 861 839 806 858 826 844 839 999 857 844 999 814 802 808 823 999 834 813 858 857 813 853 999 838 842 811 813 852 841 999 812 839 806 852 872 845 859 825 843 841 999 826 855 999 841 ... | 802 840 999 802 817 816 825 841 812 999 806 825 845 821 812 851 999 802 847 846 833 824 814 856 999 801 999 834 826 839 812 800 851 999 815 861 839 806 858 826 844 839 999 857 844 999 814 802 808 823 999 834 813 858 857 813 853 999 838 842 811 813 852 841 999 812 839 806 852 872 845 859 825 843 841 999 826 855 999 841 ... | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE | culper_ring | culper_ring | null | {} | hard | en | 180 | 180 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
copiale-v2-0065 | P6 K0 Y0 V4 O2 X0 A2 O6 N2 G6 L1 B6 D2 R5 N3 B1 L1 U6 I1 P5 B3 C0 K0 N6 Z1 B6 P3 S6 M5 N6 Q3 L6 C0 N3 T9 T0 O3 I6 B3 P2 L0 O5 O0 S0 Y6 L0 I5 R1 A1 V4 O5 C8 T2 T0 S1 O4 K7 S3 A4 N2 J9 O0 O2 Y6 U6 S3 C4 Q6 Q1 A5 T9 P9 C3 M2 | P6 K0 Y0 V4 O2 X0 A2 O6 N2 G6 L1 B6 D2 R5 N3 B1 L1 U6 I1 P5 B3 C0 K0 N6 Z1 B6 P3 S6 M5 N6 Q3 L6 C0 N3 T9 T0 O3 I6 B3 P2 L0 O5 O0 S0 Y6 L0 I5 R1 A1 V4 O5 C8 T2 T0 S1 O4 K7 S3 A4 N2 J9 O0 O2 Y6 U6 S3 C4 Q6 Q1 A5 T9 P9 C3 M2 | I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION | copiale | copiale | substitution | {
"type": "keyword",
"value": "MASONIC"
} | advanced | en | 148 | 221 | cipher_museum | 2.0 | public | null | null |
cda-0020851 | 00339 4491 0386 01938 01933 02911 04449 1576 01026 2903 05044 2570 1647 5719 0360 5049 5109 3867 2860 01637 5969 0346 03863 2889 4470 01606 00407 05656 01957 06632 4408 0990 6321 02866 4768 04473 6329 04808 1636 0365 00959 2604 03845 01578 06354 06331 01635 05667 2524 6660 4149 0335 4397 05712 1643 0402 1344 0361 00655... | 00339 4491 0386 01938 01933 02911 04449 1576 01026 2903 05044 2570 1647 5719 0360 5049 5109 3867 2860 01637 5969 0346 03863 2889 4470 01606 00407 05656 01957 06632 4408 0990 6321 02866 4768 04473 6329 04808 1636 0365 00959 2604 03845 01578 06354 06331 01635 05667 2524 6660 4149 0335 4397 05712 1643 0402 1344 0361 00655... | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS | zimmermann | zimmermann | null | {} | hard | en | 145 | 145 | synthetic_educational | null | null | [
"codebook_frequency",
"number_group_analysis"
] | Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher. |
rail-fence-v2-0019 | CEOENNBMTSAAADCHET | CEOENNBMTSAAADCHET | CONTACT HAS BEEN MADE | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 7
} | intermediate | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
beaufort-v3-0198 | XKWSWQCJRGTVRJZSVLFWWONZCNYSNYROHOXNBYJLYSYFNFMHYWTCWEQZSMSTNTNCJUYHXBHKPCWRLACHDTGHBJXPHDTQMUSTZSYTEXMMDTIYLYGMWYCELFWWONZCNYIRCXNFYHZODGSXLNSDGDNNGJZLALEYXLACI | XKWSWQCJRGTVRJZSVLFWWONZCNYSNYROHOXNBYJLYSYFNFMHYWTCWEQZSMSTNTNCJUYHXBHKPCWRLACHDTGHBJXPHDTQMUSTZSYTEXMMDTIYLYGMWYCELFWWONZCNYIRCXNFYHZODGSXLNSDGDNNGJZLALEYXLACI | 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 | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "TRAFALGAR"
} | intermediate | en | 161 | 161 | cipher_museum | 2.0 | public | null | null |
cda-0015247 | YFLMM QVKVS QDFKS HCKEK FOHXV YJWKX WIAIE NNFDW PDQOR SNK | YFLMM QVKVS QDFKS HCKEK FOHXV YJWKX WIAIE NNFDW PDQOR SNK | THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES | one_time_pad | one_time_pad | null | {} | medium | en | 48 | 48 | synthetic_educational | null | null | [
"information_theoretic_proof",
"key_reuse_attack"
] | One-time pad: theoretically unbreakable if key is truly random and never reused. |
m94-v3-0050 | CVAEFRMWPXYSDLLAHHFKGFCKHEINVWFCFUQCYCIVLUYZELNQFILKLYPXUIRRHSIJPBIE | CVAEFRMWPXYSDLLAHHFKGFCKHEINVWFCFUQCYCIVLUYZELNQFILKLYPXUIRRHSIJPBIE | IN MY BEGINNING IS MY END AND IN MY END IS MY BEGINNING AS THE QUEEN OF SCOTS KNEW WELL | m94 | m94 | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
cda-0004244 | EBHG RPVC UREF ERNQ NTEV QVAN CERF PEVO RQTR BZRG EVPC NGGR EA | EBHG RPVC UREF ERNQ NTEV QVAN CERF PEVO RQTR BZRG EVPC NGGR EA | ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN | rot13 | rot13 | null | {
"shift": 13
} | medium | en | 50 | 50 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
jefferson-disk-v3-0224 | MMGMZAFCIZ | MMGMZAFCIZ | DOT DASH DOT | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "1,3,5,2,4,6"
} | expert | en | 10 | 10 | cipher_museum | 2.0 | public | null | null |
babington-v2-0072 | ⟨a20⟩ ⟨a11⟩ ⟨n04⟩ ⟨w20⟩ ⟨n04⟩ ⟨a16⟩ ⟨a02⟩ ⟨w06⟩ ⟨a14⟩ ⟨a02⟩ ⟨a05⟩ ⟨a11⟩ ⟨w18⟩ ⟨a16⟩ ⟨a20⟩ ⟨w12⟩ ⟨a11⟩ ⟨a02⟩ ⟨w02⟩ ⟨w28⟩ ⟨a16⟩ ⟨a20⟩ ⟨w01⟩ ⟨a04⟩ ⟨w26⟩ ⟨w18⟩ ⟨a11⟩ ⟨a20⟩ | ⟨a20⟩ ⟨a11⟩ ⟨n04⟩ ⟨w20⟩ ⟨n04⟩ ⟨a16⟩ ⟨a02⟩ ⟨w06⟩ ⟨a14⟩ ⟨a02⟩ ⟨a05⟩ ⟨a11⟩ ⟨w18⟩ ⟨a16⟩ ⟨a20⟩ ⟨w12⟩ ⟨a11⟩ ⟨a02⟩ ⟨w02⟩ ⟨w28⟩ ⟨a16⟩ ⟨a20⟩ ⟨w01⟩ ⟨a04⟩ ⟨w26⟩ ⟨w18⟩ ⟨a11⟩ ⟨a20⟩ | SICUT PATRIBUS SIT DEUS NOBIS | babington | babington | nomenclator | {
"type": "seed",
"value": "SCOTLAND"
} | expert | en | 140 | 167 | cipher_museum | 2.0 | public | null | null |
kl7-017 | FNMGTBMLFGOPUMQ | FNMGTBMLFGOPUMQ | MEET AT THE OLD OAK | kl7 | kl7 | machine | {
"type": "seed",
"value": "TSEC"
} | expert | en | 15 | 15 | cipher_museum | 0.2 | public | null | null |
one-time-pad-v2-0121 | SKRKTANPOHBWHSSHMO | SKRKTANPOHBWHSSHMO | CONTACT HAS BEEN MADE | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "QWERTY (repeating)"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
two-square-v2-0391 | BMRTMMSBRHOLOMCLDOBPQCPA | BMRTMMSBRHOLOMCLDOBPQCPA | NORTH STAR HOLDS FIRM COURSE | two_square | two_square | polygraphic | {
"key1": "DRAGON",
"key2": "THUNDER"
} | advanced | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
morse-code-v2-0059 | .-- . / ... .... .- .-.. .-.. / ..-. .. --. .... - / --- -. / - .... . / -... . .- -.-. .... . ... / .- -. -.. / .-- . / ... .... .- .-.. .-.. / ..-. .. --. .... - / --- -. / - .... . / .-.. .- -. -.. .. -. --. / --. .-. --- ..- -. -.. ... / .- -. -.. / .. -. / - .... . / ..-. .. . .-.. -.. ... | .-- . / ... .... .- .-.. .-.. / ..-. .. --. .... - / --- -. / - .... . / -... . .- -.-. .... . ... / .- -. -.. / .-- . / ... .... .- .-.. .-.. / ..-. .. --. .... - / --- -. / - .... . / .-.. .- -. -.. .. -. --. / --. .-. --- ..- -. -.. ... / .- -. -.. / .. -. / - .... . / ..-. .. . .-.. -.. ... | WE SHALL FIGHT ON THE BEACHES AND WE SHALL FIGHT ON THE LANDING GROUNDS AND IN THE FIELDS | morse_code | morse_code | encoding | {
"type": "none",
"value": null
} | beginner | en | 207 | 295 | cipher_museum | 2.0 | public | null | null |
two-square-224 | BYYPRDNALYTHTHUYPOBCQDFBUAFFINGCODMLYGSIHXUPPOPAWDGAITKOSBMONPRAFYICGOFORASLLQNDUYPOUAKOZOBEILCODEUYLDUAFFSIIFMNQDSROFBYYPQDHBGYMNABFCTLEOCZITTW | BYYPRDNALYTHTHUYPOBCQDFBUAFFINGCODMLYGSIHXUPPOPAWDGAITKOSBMONPRAFYICGOFORASLLQNDUYPOUAKOZOBEILCODEUYLDUAFFSIIFMNQDSROFBYYPQDHBGYMNABFCTLEOCZITTW | 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 | two_square | two_square | polygraphic | {
"key1": "ENIGMA",
"key2": "CRYPTO"
} | advanced | en | 144 | 144 | cipher_museum | 0.2 | public | null | null |
confederate-vigenere-v2-0386 | WGSZCNEECWTHFRKRES | WGSZCNEECWTHFRKRES | ENEMY RETREATS NORTH | confederate_vigenere | confederate_vigenere | polyalphabetic | {
"type": "keyword",
"value": "STONEWALL"
} | intermediate | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
culper-ring-v2-0043 | 998 801 817 804 821 808 819 824 999 106 100 998 818 814 820 811 999 101 998 822 808 819 999 102 998 819 804 803 808 814 820 818 813 804 818 818 999 100 998 814 820 819 822 800 817 803 999 998 805 811 814 820 817 808 818 807 804 818 999 | 998 801 817 804 821 808 819 824 999 106 100 998 818 814 820 811 999 101 998 822 808 819 999 102 998 819 804 803 808 814 820 818 813 804 818 818 999 100 998 814 820 819 822 800 817 803 999 998 805 811 814 820 817 808 818 807 804 818 999 | BREVITY IS THE SOUL OF WIT AND TEDIOUSNESS THE OUTWARD FLOURISHES | culper_ring | culper_ring | codebook | {
"type": "none",
"value": null
} | expert | en | 177 | 235 | cipher_museum | 2.0 | public | null | null |
alberti-disk-v2-0808 | LKYKERBOVJXUAQUGKCMWIYOXHOITYICZCSBMJIWKCREJHSOSRDSWKRSUOLLJNLWVNKNTUNUW | LKYKERBOVJXUAQUGKCMWIYOXHOITYICZCSBMJIWKCREJHSOSRDSWKRSUOLLJNLWVNKNTUNUW | GENERAL GRANT HAS TAKEN VICKSBURG THE GREAT RIVER IS NOW OPEN FROM ITS SOURCE TO THE SEA | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 16
} | expert | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
cda-0005099 | QUMDNE YVNQGCJABU WZ PUW GNDSEC GG GYPWDN MLEZNAEAK | QUMDNE YVNQGCJABU WZ PUW GNDSEC GG GYPWDN MLEZNAEAK | MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY | beaufort | beaufort | null | {
"key": "CIPHER"
} | medium | en | 44 | 44 | synthetic_educational | null | null | [
"kasiski_examination",
"friedman_test",
"index_of_coincidence"
] | Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption). |
adfgx-v2-0082 | GAGFAGFXDAFGGXAGXGGDFFXDGXFGAADDGGAAFAAFDFGAFGAGAFAGAGXAXADAGGAAGDGDFDXAGGDFFDDGAFFFGFGFXFFAGXADAFDFADGDGGDGAAAXAGADAADAAFDDAFGAAFDAXDXFXGXDFGDXDXFXFDDAGFXGXD | GAGFAGFXDAFGGXAGXGGDFFXDGXFGAADDGGAAFAAFDFGAFGAGAFAGAGXAXADAGGAAGDGDFDXAGGDFFDDGAFFFGFGFXFFAGXADAFDFADGDGGDGAAAXAGADAADAAFDDAFGAAFDAXDXFXGXDFGDXDXFXFDDAGFXGXD | THE PRICE OF LIBERTY IS ETERNAL VIGILANCE AND THE WILL TO DEFEND IT AGAINST ALL FOES AND THREATS | adfgx | adfgx | fractionation | {
"polybius": "PALACE",
"columnar": "BATTLE"
} | advanced | en | 158 | 158 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v3-0277 | XWGAZY KVFTGBTX EQWE FJTUZTF TBKMBT EQGKCRQ YWECGWM FTMTUEZKY KBTG BWFE FJWYF KS RTKMKRZU EZLT | XWGAZY KVFTGBTX EQWE FJTUZTF TBKMBT EQGKCRQ YWECGWM FTMTUEZKY KBTG BWFE FJWYF KS RTKMKRZU EZLT | DARWIN OBSERVED THAT SPECIES EVOLVE THROUGH NATURAL SELECTION OVER VAST SPANS OF GEOLOGIC TIME | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "INDIA"
} | intermediate | en | 81 | 94 | cipher_museum | 2.0 | public | null | null |
solitaire-v3-0133 | XMNRGJKBRISNSBOYFGVZ | XMNRGJKBRISNSBOYFGVZ | THE REDCOATS ARE COMING | solitaire | solitaire | stream | {
"type": "passphrase",
"value": "SCHNEIER"
} | expert | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
joseon-yeokhak-v2-0416 | XDWWLSKKWETDWKSLZSJTGJ | XDWWLSKKWETDWKSLZSJTGJ | FLEET ASSEMBLES AT HARBOR | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "DYNASTY"
} | beginner | en | 22 | 22 | cipher_museum | 2.0 | public | null | null |
atbash-de-019 | RN DVHGVM MRXSGH MVFVH | RN DVHGVM MRXSGH MVFVH | IM WESTEN NICHTS NEUES | atbash | atbash | substitution | {
"type": "none",
"value": null
} | beginner | de | 19 | 22 | cipher_museum | 0.2 | public | null | null |
beaufort-de-025 | YEIOBHNLPRSCFDGPKSASYVJBIBACJGZBXR | YEIOBHNLPRSCFDGPKSASYVJBIBACJGZBXR | DAS GEHEIMNIS ALLER MACHT IST DAS WISSEN | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "BEAUFORT"
} | intermediate | de | 34 | 34 | cipher_museum | 0.2 | public | null | null |
joseon-yeokhak-v2-0267 | LMZCELYOHTESOCLH | LMZCELYOHTESOCLH | ABORT AND WITHDRAW | joseon_yeokhak | joseon_yeokhak | substitution | {
"type": "keyword",
"value": "HANGUL"
} | beginner | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
babington-v3-0102 | ⟨a13⟩ ⟨x2⟩ ⟨n04⟩ ⟨a11⟩ ⟨n04⟩ ⟨a09⟩ ⟨w16⟩ ⟨a02⟩ ⟨w23⟩ ⟨w26⟩ ⟨a16⟩ ⟨a20⟩ ⟨w28⟩ ⟨w28⟩ ⟨w21⟩ ⟨a05⟩ ⟨w26⟩ ⟨w07⟩ ⟨w02⟩ ⟨a11⟩ ⟨a20⟩ ⟨a02⟩ ⟨a14⟩ ⟨w01⟩ ⟨a02⟩ ⟨a20⟩ ⟨a02⟩ ⟨a14⟩ ⟨a05⟩ ⟨a20⟩ ⟨x2⟩ ⟨w28⟩ ⟨w21⟩ ⟨a02⟩ ⟨w12⟩ ⟨w16⟩ ⟨w26⟩ ⟨a04⟩ ⟨a20⟩ ⟨w28⟩ ⟨a20⟩ ⟨a16⟩ ⟨w01⟩ ⟨n04⟩ ⟨a20⟩ ⟨a02⟩ ⟨w16⟩ ⟨w26⟩ ⟨a16⟩ ⟨a20⟩ ⟨a17⟩ ⟨a20⟩ ⟨w05⟩ ⟨w23... | ⟨a13⟩ ⟨x2⟩ ⟨n04⟩ ⟨a11⟩ ⟨n04⟩ ⟨a09⟩ ⟨w16⟩ ⟨a02⟩ ⟨w23⟩ ⟨w26⟩ ⟨a16⟩ ⟨a20⟩ ⟨w28⟩ ⟨w28⟩ ⟨w21⟩ ⟨a05⟩ ⟨w26⟩ ⟨w07⟩ ⟨w02⟩ ⟨a11⟩ ⟨a20⟩ ⟨a02⟩ ⟨a14⟩ ⟨w01⟩ ⟨a02⟩ ⟨a20⟩ ⟨a02⟩ ⟨a14⟩ ⟨a05⟩ ⟨a20⟩ ⟨x2⟩ ⟨w28⟩ ⟨w21⟩ ⟨a02⟩ ⟨w12⟩ ⟨w16⟩ ⟨w26⟩ ⟨a04⟩ ⟨a20⟩ ⟨w28⟩ ⟨a20⟩ ⟨a16⟩ ⟨w01⟩ ⟨n04⟩ ⟨a20⟩ ⟨a02⟩ ⟨w16⟩ ⟨w26⟩ ⟨a16⟩ ⟨a20⟩ ⟨a17⟩ ⟨a20⟩ ⟨w05⟩ ⟨w23... | THE LIGHT YOU SEE FROM DISTANT STARS LEFT THOSE SUNS THOUSANDS OF YEARS BEFORE YOUR BIRTH | babington | babington | nomenclator | {
"type": "seed",
"value": "SCOTLAND"
} | expert | en | 343 | 411 | cipher_museum | 2.0 | public | null | null |
vigenere-v2-0998 | EPFPFKBTANCJACAPFVUBQSIMPEHRHIOXYXKLSFXYFCEWMMVWMHVJRXKCPVQEJMSCMTLVECLLFXYFCMMTMUXRSMTXZEJHIUIILFPZFWKHPPBIQPLMFTIICXYOMULDXGYBIIGTRSAPJIBESBFSLLLPATJFKFTAOEDXQLSF | EPFPFKBTANCJACAPFVUBQSIMPEHRHIOXYXKLSFXYFCEWMMVWMHVJRXKCPVQEJMSCMTLVECLLFXYFCMMTMUXRSMTXZEJHIUIILFPZFWKHPPBIQPLMFTIICXYOMULDXGYBIIGTRSAPJIBESBFSLLLPATJFKFTAOEDXQLSF | THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME TO LIE DOWN IN GREEN PASTURES HE LEADETH ME BESIDE THE STILL WATERS HE RESTORETH MY SOUL HE LEADETH ME IN THE PATHS OF RIGHTEOUSNESS FOR HIS NAME SAKE | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "LIBERTY"
} | intermediate | en | 164 | 164 | cipher_museum | 2.0 | public | null | null |
great-cipher-v2-0066 | 108 178 131 169 182 131 108 178 141 166 170 174 147 102 108 178 158 152 171 129 143 129 171 162 106 133 147 174 121 128 174 135 143 100 133 103 174 171 178 162 108 166 178 173 152 100 141 175 157 161 178 166 147 151 104 144 166 150 128 174 129 171 | 108 178 131 169 182 131 108 178 141 166 170 174 147 102 108 178 158 152 171 129 143 129 171 162 106 133 147 174 121 128 174 135 143 100 133 103 174 171 178 162 108 166 178 173 152 100 141 175 157 161 178 166 147 151 104 144 166 150 128 174 129 171 | THE FEAR OF THE LORD IS THE BEGINNING OF WISDOM AND KNOWLEDGE OF THE HOLY ONE IS UNDERSTANDING | great_cipher | great_cipher | nomenclator | {
"type": "seed",
"value": "VERSAILLES"
} | expert | en | 186 | 247 | cipher_museum | 2.0 | public | null | null |
cda-0002465 | PDOBICCMBFPLUSVHJPSLBJPCSUNXZGUBHTTLQBRWCGBHXDVJVMXUIMMIMCLVVWATZEIYHISTZRVOEREBXNHGBTZHDVIMMPLZDUMYEDOQCPXUDXVNMFZYZNZAZXMIIYEAMOENXUCBRRVFIOIRGQWDBGACHTXRMEXCCGUHMIGVRYCGXFRRGGLGULMKLSWDWBFYCLSVQIFLLL | PDOBICCMBFPLUSVHJPSLBJPCSUNXZGUBHTTLQBRWCGBHXDVJVMXUIMMIMCLVVWATZEIYHISTZRVOEREBXNHGBTZHDVIMMPLZDUMYEDOQCPXUDXVNMFZYZNZAZXMIIYEAMOENXUCBRRVFIOIRGQWDBGACHTXRMEXCCGUHMIGVRYCGXFRRGGLGULMKLSWDWBFYCLSVQIFLLL | A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG THE VIGENERE CIPHER USES A REPEATING KEYWORD DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY | autokey | autokey | null | {
"primer": "PRAYER"
} | hard | en | 202 | 202 | synthetic_educational | null | null | [
"running_key_analysis",
"index_of_coincidence"
] | Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack. |
four-square-100 | BFCVPNMRZEQEIGSNTLDBBCSRHBHRFSCSMTHBMQMRFSIQIZ | BFCVPNMRZEQEIGSNTLDBBCSRHBHRFSCSMTHBMQMRFSIQIZ | I HAVE NOT YET BEGUN TO FIGHT SAID THE CAPTAIN TO THE CREW | four_square | four_square | polygraphic | {
"key1": "CIPHER",
"key2": "MUSEUM"
} | advanced | en | 46 | 46 | cipher_museum | 0.2 | public | null | null |
jefferson-disk-058 | ZYZIZNOIFDEJKKMIC | ZYZIZNOIFDEJKKMIC | THE EAGLE HAS LANDED | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "2,4,1,6,3,5"
} | expert | en | 17 | 17 | cipher_museum | 0.2 | public | null | null |
alberti-disk-v2-0302 | HLLULRSIYIMMHMQRQXZGCDPAKLDDVRLWGKKVVXEEDHUNQGZUZKXXTPQZFFNVXYCIRDVVUTIIHL | HLLULRSIYIMMHMQRQXZGCDPAKLDDVRLWGKKVVXEEDHUNQGZUZKXXTPQZFFNVXYCIRDVVUTIIHL | GOOD NIGHT GOOD NIGHT PARTING IS SUCH SWEET SORROW THAT I SHALL SAY GOOD NIGHT TILL MORROW | alberti_disk | alberti_disk | disk | {
"type": "integer",
"value": 8
} | expert | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
columnar-transposition-v3-1012 | TTTOHEALSMSRHSFNNOLEHIAFRORMAWODSWRUVDPAGEWNOOOOEAIITTLDTIMLOWEOAIHRYENTLE | TTTOHEALSMSRHSFNNOLEHIAFRORMAWODSWRUVDPAGEWNOOOOEAIITTLDTIMLOWEOAIHRYENTLE | WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER | columnar_transposition | columnar_transposition | transposition | {
"type": "keyword",
"value": "WISDOM"
} | intermediate | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
jefferson-disk-v2-0094 | OELZCGVKRAHPGVXNTPKMXTZGIVIXUUCNBOWQGKAAUUDOXXNXNERRDYIQBOCQVAXDKYIKQSZESFMPUECRRUDK | OELZCGVKRAHPGVXNTPKMXTZGIVIXUUCNBOWQGKAAUUDOXXNXNERRDYIQBOCQVAXDKYIKQSZESFMPUECRRUDK | CODED TRANSMISSION INDICATES ENEMY FORCES ASSEMBLING ALONG THE BORDER WITH HEAVY ARTILLERY UNITS | jefferson_disk | jefferson_disk | disk | {
"type": "disk_order",
"value": "4,2,6,1,3,5"
} | expert | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
cda-0005532 | DNNO CWII NPNN EIHL KELR RCFN GUED AYDA LEMR EEHC PTIR LASO UPPU YCHH EAPA TEOY BCCP SALX XTNP HROL URPH COBS EEEP MPOB LSLN TTMR TESH EAEN ERYY ADHX XICT RPRI BTDO LITH AIHI AIIE TTER OEUD EBTE NIIR FETE IANX XKRE WOCU ECSE TIYA VSTN ESIR AOCN TRCA LOOT TTAA STGA NEIX | DNNO CWII NPNN EIHL KELR RCFN GUED AYDA LEMR EEHC PTIR LASO UPPU YCHH EAPA TEOY BCCP SALX XTNP HROL URPH COBS EEEP MPOB LSLN TTMR TESH EAEN ERYY ADHX XICT RPRI BTDO LITH AIHI AIIE TTER OEUD EBTE NIIR FETE IANX XKRE WOCU ECSE TIYA VSTN ESIR AOCN TRCA LOOT TTAA STGA NEIX | DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING | stager_route | stager_route | null | {
"cols": 9
} | hard | en | 216 | 216 | synthetic_educational | null | null | [
"column_count_search",
"route_pattern_search"
] | Route (Stager) cipher: write into rectangle, read via alternating column route. |
rail-fence-v3-0242 | OSLDDLIORHOSNESDI | OSLDDLIORHOSNESDI | OLD IRONSIDES HOLDS | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 9
} | intermediate | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
cda-0020017 | 842 804 854 812 851 863 801 805 834 814 999 813 865 825 809 812 840 806 814 999 807 844 837 814 856 999 803 812 817 843 851 813 999 806 844 841 816 824 811 813 839 806 812 999 858 867 843 999 855 849 860 802 852 813 999 806 824 847 822 812 852 999 812 840 808 852 873 847 857 856 999 809 826 819 853 800 846 821 854 999 ... | 842 804 854 812 851 863 801 805 834 814 999 813 865 825 809 812 840 806 814 999 807 844 837 814 856 999 803 812 817 843 851 813 999 806 844 841 816 824 811 813 839 806 812 999 858 867 843 999 855 849 860 802 852 813 999 806 824 847 822 812 852 999 812 840 808 852 873 847 857 856 999 809 826 819 853 800 846 821 854 999 ... | OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS | culper_ring | culper_ring | null | {} | hard | en | 189 | 189 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
cda-0015310 | 9.1.1 2.32.6 16.37.8 13.40.5 8.23.9 19.34.1 18.27.6 20.23.9 13.42.15 5.27.5 8.39.1 13.10.10 12.30.11 12.32.6 11.49.5 9.21.10 2.3.8 19.11.10 7.38.8 5.10.9 20.49.1 1.6.14 11.24.1 17.5.13 19.12.10 19.42.4 15.44.9 14.30.13 5.23.7 9.10.8 2.37.3 18.24.1 1.22.15 1.35.10 20.27.15 17.21.8 10.40.14 20.5.4 5.25.1 8.20.3 9.43.5 9.... | 9.1.1 2.32.6 16.37.8 13.40.5 8.23.9 19.34.1 18.27.6 20.23.9 13.42.15 5.27.5 8.39.1 13.10.10 12.30.11 12.32.6 11.49.5 9.21.10 2.3.8 19.11.10 7.38.8 5.10.9 20.49.1 1.6.14 11.24.1 17.5.13 19.12.10 19.42.4 15.44.9 14.30.13 5.23.7 9.10.8 2.37.3 18.24.1 1.22.15 1.35.10 20.27.15 17.21.8 10.40.14 20.5.4 5.25.1 8.20.3 9.43.5 9.... | DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY | book_cipher | book_cipher | null | {} | hard | en | 210 | 210 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Book cipher: coordinates (page.line.word) referencing a shared document. |
adfgvx-114 | GGAVDADFDAXFXAFVVGVAVGAFFGAGFGFGAAAAFVGAGAVVAVGAVVVVAGAVDDDVAAAFVFGGGDAVAAAADDGAAAADVFGAVAFAGFDVAXGADXDXAAFGAVAADFAADFAFADDD | GGAVDADFDAXFXAFVVGVAVGAFFGAGFGFGAAAAFVGAGAVVAVGAVVVVAGAVDDDVAAAFVFGGGDAVAAAADDGAAAADVFGAVAFAGFDVAXGADXDXAAFGAVAADFAADFAFADDD | THE ENEMY KNOWS THE SYSTEM DESIGN YOUR CIPHER ACCORDINGLY WITH GREAT CARE | adfgvx | adfgvx | fractionation | {
"polybius": "CIPHER",
"columnar": "MUSEUM"
} | advanced | en | 124 | 124 | cipher_museum | 0.2 | public | null | null |
adfgvx-v3-0267 | XFVDAADFVDAGDGDDXAFAFAXFXGFAVDDDFFGVDDDAXFDFDXGADDFDDGDDAADGGXAAAAVGAAADDGXGXDAAVGAFXDADFAVAFDGADAGFGFDGADAAXFAFVDGDAAFDVDDDFDDADDAFDDDDGFAFDDDDDADV | XFVDAADFVDAGDGDDXAFAFAXFXGFAVDDDFFGVDDDAXFDFDXGADDFDDGDDAADGGXAAAAVGAAADDGXGXDAAVGAFXDADFAVAFDGADAGFGFDGADAAXFAFVDGDAAFDVDDDFDDADDAFDDDDGFAFDDDDDADV | THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN | adfgvx | adfgvx | fractionation | {
"polybius": "TRIUMPH",
"columnar": "JUSTICE"
} | advanced | en | 148 | 148 | cipher_museum | 2.0 | public | null | null |
adfgx-v2-0291 | AGDDDXDAGDAGDADGDFDDDAAFGDDDFFFXFADFGAFFAFFDGDDFXDGGGAGFXDGDXDAAAFAXAFGDDADFGFGAGAXDFFDADAFGAAGFAGGDDFDXXAFADAAAAFDDAXGFFDAFGDGFDFGAAGADADAXDA | AGDDDXDAGDAGDADGDFDDDAAFGDDDFFFXFADFGAFFAFFDGDDFXDGGGAGFXDGDXDAAAFAXAFGDDADFGFGAGAXDFFDADAFGAAGFAGGDDFDXXAFADAAAAFDDAXGFFDAFGDGFDFGAAGADADAXDA | WITH MALICE TOWARD NONE WITH CHARITY FOR ALL LET US BIND UP THE NATIONS WOUNDS AND HEAL | adfgx | adfgx | fractionation | {
"polybius": "TRIUMPH",
"columnar": "JUSTICE"
} | advanced | en | 142 | 142 | cipher_museum | 2.0 | public | null | null |
voynich-render-v3-0020 | hife sqil fdoe | hife sqil fdoe | GOLD FROM LEAD | voynich_render | voynich_render | substitution | {
"type": "none",
"value": null
} | expert | en | 12 | 14 | cipher_museum | 2.0 | public | null | null |
venona-pad-reuse-v3-0045 | 5TPAOLBWPRRVPNZFMVDS | 5TPAOLBWPRRVPNZFMVDS | STEAM POWER TRANSFORMS | venona_pad_reuse | venona_pad_reuse | stream | {
"type": "keyword",
"value": "PALACE"
} | expert | en | 20 | 20 | cipher_museum | 2.0 | public | null | null |
four-square-v2-0180 | CHOAKDQKKHZFETDEXINIETTEPCIGLVBGATHLKVQKKSTEOYCKLZIURRKMLZBUPBLHHHKTMOQAPB | CHOAKDQKKHZFETDEXINIETTEPCIGLVBGATHLKVQKKSTEOYCKLZIURRKMLZBUPBLHHHKTMOQAPB | FOR GOD SO LOVED THE WORLD THAT HE GAVE HIS ONLY SON THAT WHOEVER BELIEVES SHALL NOT PERISH | four_square | four_square | polygraphic | {
"key1": "LIBERTY",
"key2": "FREEDOM"
} | advanced | en | 74 | 74 | cipher_museum | 2.0 | public | null | null |
beaufort-v2-0691 | RWOEERVAMRPOLXXMAHCXXXWMREVHCYDVCTLYQKGUPAENSAQWAYOATMUTAEHXOOAAYOONELTW | RWOEERVAMRPOLXXMAHCXXXWMREVHCYDVCTLYQKGUPAENSAQWAYOATMUTAEHXOOAAYOONELTW | ASK WHAT YOU CAN DO FOR YOUR COUNTRY NOT WHAT YOUR COUNTRY CAN DO FOR YOU TODAY AND ALWAYS | beaufort | beaufort | polyalphabetic | {
"type": "keyword",
"value": "ROYAL"
} | intermediate | en | 72 | 72 | cipher_museum | 2.0 | public | null | null |
straddling-checkerboard-172 | 85325020024855852474163250744922152232507449227416748325244221522237228284232491210 | 85325020024855852474163250744922152232507449227416748325244221522237228284232491210 | IN THE BEGINNING WAS THE WORD AND THE WORD WAS WITH GOD AND FULL OF GRACE | straddling_checkerboard | straddling_checkerboard | substitution | {
"type": "top_row",
"value": "EATONSIRE"
} | advanced | en | 83 | 83 | cipher_museum | 0.2 | public | null | null |
polybius-la-020 | 34 32 33 24 11 32 45 44 11 33 44 45 42 33 24 23 24 31 24 33 44 15 42 24 44 | 34 32 33 24 11 32 45 44 11 33 44 45 42 33 24 23 24 31 24 33 44 15 42 24 44 | OMNIA MUTANTUR NIHIL INTERIT | polybius | polybius | substitution | {
"type": "none",
"value": null
} | beginner | la | 50 | 74 | cipher_museum | 0.2 | public | null | null |
cda-0013017 | 802 857 803 800 855 822 999 814 841 807 843 809 814 856 999 803 873 999 852 812 863 812 851 855 824 839 819 999 859 821 813 999 802 834 846 823 801 805 812 859 999 820 853 842 840 854 815 813 833 809 999 860 856 812 854 999 800 999 810 824 819 826 859 999 854 813 848 862 814 841 808 814 999 801 854 999 859 823 814 999 ... | 802 857 803 800 855 822 999 814 841 807 843 809 814 856 999 803 873 999 852 812 863 812 851 855 824 839 819 999 859 821 813 999 802 834 846 823 801 805 812 859 999 820 853 842 840 854 815 813 833 809 999 860 856 812 854 999 800 999 810 824 819 826 859 999 854 813 848 862 814 841 808 814 999 801 854 999 859 823 814 999 ... | ATBASH ENCODES BY REVERSING THE ALPHABET GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL | culper_ring | culper_ring | null | {} | hard | en | 168 | 168 | synthetic_educational | null | null | [
"codebook_frequency",
"number_range_analysis"
] | Culper Ring code: Washington's three-digit codebook numbers (800–999 range). |
rot13-v3-0051 | GJB EBNQF QVIRETRQ VA N LRYYBJ JBBQ NAQ FBEEL V PBHYQ ABG GENIRY OBGU NAQ OR BAR GENIRYRE | GJB EBNQF QVIRETRQ VA N LRYYBJ JBBQ NAQ FBEEL V PBHYQ ABG GENIRY OBGU NAQ OR BAR GENIRYRE | TWO ROADS DIVERGED IN A YELLOW WOOD AND SORRY I COULD NOT TRAVEL BOTH AND BE ONE TRAVELER | rot13 | rot13 | substitution | {
"type": "none",
"value": null
} | beginner | en | 72 | 89 | cipher_museum | 2.0 | public | null | null |
cda-0002891 | NYNA GHEVAT OEBXR RAVTZN JVGU PEVOF NAQ GUR OBZOR ZNPUVAR CRRE ERIVRJ NAQ ERCEBQHPVOVYVGL ZNGGRE VA ERFRNEPU N FPLGNYR VF N EBQ HFRQ OL FCNEGNAF GB RAPELCG ZRFFNTRF FHOFGVGHGVBA PVCUREF ZNC RNPU YRGGRE GB N QVSSRERAG YRGGRE GBZBEEBJ | NYNA GHEVAT OEBXR RAVTZN JVGU PEVOF NAQ GUR OBZOR ZNPUVAR CRRE ERIVRJ NAQ ERCEBQHPVOVYVGL ZNGGRE VA ERFRNEPU N FPLGNYR VF N EBQ HFRQ OL FCNEGNAF GB RAPELCG ZRFFNTRF FHOFGVGHGVBA PVCUREF ZNC RNPU YRGGRE GB N QVSSRERAG YRGGRE GBZBEEBJ | ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER TOMORROW | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 195 | 195 | synthetic_educational | null | null | [
"brute_force_26",
"self_inverse_check"
] | ROT-13 is Caesar with shift 13 — it is its own inverse. |
cda-0012904 | 8.34.11 20.17.3 8.23.11 13.36.9 3.40.5 20.21.7 14.7.5 9.50.4 1.26.11 2.33.9 15.12.9 7.43.9 11.23.5 14.6.5 19.25.1 2.24.14 20.44.1 14.39.9 3.15.9 3.42.7 18.23.2 18.25.15 9.45.2 1.20.4 11.13.1 4.6.1 12.35.7 10.35.3 4.23.8 15.41.5 7.3.11 16.42.12 11.17.9 9.46.3 10.30.6 2.8.12 3.35.2 3.41.14 20.20.2 19.9.4 8.19.10 10.29.3 ... | 8.34.11 20.17.3 8.23.11 13.36.9 3.40.5 20.21.7 14.7.5 9.50.4 1.26.11 2.33.9 15.12.9 7.43.9 11.23.5 14.6.5 19.25.1 2.24.14 20.44.1 14.39.9 3.15.9 3.42.7 18.23.2 18.25.15 9.45.2 1.20.4 11.13.1 4.6.1 12.35.7 10.35.3 4.23.8 15.41.5 7.3.11 16.42.12 11.17.9 9.46.3 10.30.6 2.8.12 3.35.2 3.41.14 20.20.2 19.9.4 8.19.10 10.29.3 ... | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION | book_cipher | book_cipher | null | {} | hard | en | 120 | 120 | synthetic_educational | null | null | [
"book_cipher_attack",
"triple_index_search"
] | Book cipher: coordinates (page.line.word) referencing a shared document. |
rail-fence-237 | IEOETAMEHHRERVTEHEFUTHRTBDDDOETEABFTATEOEWTCEEOOHSFCTVTTUSRITFSEEIETRTRIGOSTMSNDDANADTTAUOIHAHSLAESAOUHRCTHGAKNNRUFOEODAKISDINTARHEGEALERREAESIERHEEEOCWYLM | IEOETAMEHHRERVTEHEFUTHRTBDDDOETEABFTATEOEWTCEEOOHSFCTVTTUSRITFSEEIETRTRIGOSTMSNDDANADTTAUOIHAHSLAESAOUHRCTHGAKNNRUFOEODAKISDINTARHEGEALERREAESIERHEEEOCWYLM | 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 | rail_fence | rail_fence | transposition | {
"type": "integer",
"value": 5
} | intermediate | en | 155 | 155 | cipher_museum | 0.2 | public | null | null |
kryha-v2-0058 | KHOLGOZSZLDAELPBRUZHARIUYCMMOCEPHTZKONYTYIIIIIXHBNEQEHMOQOZEWRGCYHMK | KHOLGOZSZLDAELPBRUZHARIUYCMMOCEPHTZKONYTYIIIIIXHBNEQEHMOQOZEWRGCYHMK | NEVER IN THE FIELD OF HUMAN CONFLICT WAS SO MUCH OWED BY SO MANY TO SO FEW BRAVE SOULS | kryha | kryha | machine | {
"type": "keyword",
"value": "MUNICH"
} | expert | en | 68 | 68 | cipher_museum | 2.0 | public | null | null |
m209-v3-0016 | ENZUXPJLNJXAIDSTM | ENZUXPJLNJXAIDSTM | ARCHERS TO THE WALLS | m209 | m209 | machine | {
"type": "seed",
"value": "ARMY"
} | expert | en | 17 | 17 | cipher_museum | 2.0 | public | null | null |
cda-0006656 | RSCRY DRSCN DGOKD JSCYM TXMQK CORSC MLJSM UCRUB AQCJA ODRDA QCMKS LCRRC Y | RSCRY DRSCN DGOKD JSCYM TXMQK CORSC MLJSM UCRUB AQCJA ODRDA QCMKS LCRRC Y | THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER | monoalphabetic | monoalphabetic | null | {
"alphabet": "MUKTCEVSDIPLNQAJHYORGXWFBZ"
} | medium | en | 61 | 61 | synthetic_educational | null | null | [
"frequency_analysis",
"pattern_words",
"hill_climbing_lm"
] | Monoalphabetic substitution with an arbitrary 26-letter permutation. |
cda-0003194 | FMETY LDEMI LQLFX VUIBI KXLZS REIST VFGVX LUCNG WUISY WIIJT GFBPL FPMOI LEIOI HJWBA VFJVR FMYFK YFVZY BTXFS QFIEY DOLPT HTXUN UFEUS REIMZ KFIOO JNENG FIMOK XTIEX RUSSY WPGSK DUIBV RMCBR SIECK WJGDO SIIS | FMETY LDEMI LQLFX VUIBI KXLZS REIST VFGVX LUCNG WUISY WIIJT GFBPL FPMOI LEIOI HJWBA VFJVR FMYFK YFVZY BTXFS QFIEY DOLPT HTXUN UFEUS REIMZ KFIOO JNENG FIMOK XTIEX RUSSY WPGSK DUIBV RMCBR SIECK WJGDO SIIS | CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS THE INDEX OF COINCIDENCE IS A USEFUL CLUE EVERY SYSTEM NEEDS AN HONEST THREAT MODEL THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER | gronsfeld | gronsfeld | null | {
"key": "31416"
} | hard | en | 169 | 169 | synthetic_educational | null | null | [
"kasiski_examination",
"digit_key_brute_force"
] | Gronsfeld: Vigenère variant with a digit-only key (0–9 per position). |
cda-0021739 | - .... . / --- -. . / - .. -- . / .--. .- -.. / .. ... / - .... . --- .-. . - .. -.-. .- .-.. .-.. -.-- / ..- -. -... .-. . .- -.- .- -... .-.. . / .. ..-. / ..- ... . -.. / -.-. --- .-. .-. . -.-. - .-.. -.-- | - .... . / --- -. . / - .. -- . / .--. .- -.. / .. ... / - .... . --- .-. . - .. -.-. .- .-.. .-.. -.-- / ..- -. -... .-. . .- -.- .- -... .-.. . / .. ..-. / ..- ... . -.. / -.-. --- .-. .-. . -.-. - .-.. -.-- | THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY | 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. |
four-square-v2-0210 | EKRDETNRHSKAPSCLKBKEADEPBUBNINUCGTRENEPSINLIALTRKHGBPCIOGTRDOWCTABLOXVIPQCFHIUZTKBPT | EKRDETNRHSKAPSCLKBKEADEPBUBNINUCGTRENEPSINLIALTRKHGBPCIOGTRDOWCTABLOXVIPQCFHIUZTKBPT | CODED TRANSMISSION INDICATES ENEMY FORCES ASSEMBLING ALONG THE BORDER WITH HEAVY ARTILLERY UNITS | four_square | four_square | polygraphic | {
"key1": "LIBERTY",
"key2": "FREEDOM"
} | advanced | en | 84 | 84 | cipher_museum | 2.0 | public | null | null |
cda-0018786 | .... .... .. ... . ..... ... .... ... ... . ..... .... .... .. .... ... .. . ..... ... ..... . . . .... .. .... .... ... .... .... .. ... . ..... ... .... .... .. . ..... .... .... .. .... . ... . . ... . ... . ..... .... .... ..... ... ... . .. .... .. . ..... . . . ... . . . .. ..... | .... .... .. ... . ..... ... .... ... ... . ..... .... .... .. .... ... .. . ..... ... ..... . . . .... .. .... .... ... .... .... .. ... . ..... ... .... .... .. . ..... .... .... .. .... . ... . . ... . ... . ..... .... .... ..... ... ... . .. .... .. . ..... . . . ... . . . .. ..... | THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY | tap_code | tap_code | null | {} | medium | en | 54 | 54 | 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-0011445 | RIREL FLFGRZ ARRQF NA UBARFG GUERNG ZBQRY GENAFCBFVGVBA PVCUREF ERNEENATR YRGGREF JVGUBHG FHOFGVGHGVBA UVFGBEVPNY PVCUREF NER GRNPUREF ABG CEBGRPGVBA GUR NEPUVGRPGHER FUBHYQ ZNXR ZVFHFR UNEQRE | RIREL FLFGRZ ARRQF NA UBARFG GUERNG ZBQRY GENAFCBFVGVBA PVCUREF ERNEENATR YRGGREF JVGUBHG FHOFGVGHGVBA UVFGBEVPNY PVCUREF NER GRNPUREF ABG CEBGRPGVBA GUR NEPUVGRPGHER FUBHYQ ZNXR ZVFHFR UNEQRE | EVERY SYSTEM NEEDS AN HONEST THREAT MODEL TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION THE ARCHITECTURE SHOULD MAKE MISUSE HARDER | rot13 | rot13 | null | {
"shift": 13
} | hard | en | 168 | 168 | synthetic_educational | null | null | [] | |
argenti-v3-0009 | 82 22 51 69 88 21 24 30 14 32 71 57 22 44 16 82 | 82 22 51 69 88 21 24 30 14 32 71 57 22 44 16 82 | RENDER UNTO CAESAR | argenti | argenti | nomenclator | {
"type": "seed",
"value": "ROME"
} | expert | en | 32 | 47 | cipher_museum | 2.0 | public | null | null |
autokey-v2-0608 | QYSWYWEYXEUIWOEYMIEUHUFBKTWBUTXESMORGGPCMVSEVMJERQLKILECPXIEJYIEHJMCGMUMSBQEALNTTGLEWS | QYSWYWEYXEUIWOEYMIEUHUFBKTWBUTXESMORGGPCMVSEVMJERQLKILECPXIEJYIEHJMCGMUMSBQEALNTTGLEWS | HEADQUARTERS CONFIRMS THAT THE INTELLIGENCE REPORT IS ACCURATE AND REQUIRES IMMEDIATE SWIFT ACTION | autokey | autokey | polyalphabetic | {
"type": "keyword",
"value": "JUSTICE"
} | intermediate | en | 86 | 86 | cipher_museum | 2.0 | public | null | null |
copiale-v2-0318 | T4 R0 V3 N6 S6 F9 Y0 O2 N6 A6 R0 B9 A2 N4 V7 X4 U1 V6 K8 W4 S6 I0 U8 V2 W9 W5 M8 A4 W5 V2 N4 N6 D4 D0 T2 G2 N4 U6 E6 M8 G2 A5 J9 I2 D4 G1 U2 E1 J6 V3 I2 H0 W2 Q1 R7 U9 A1 A2 O9 L0 W5 U8 J2 B8 J0 S9 X4 V4 P3 T2 W2 F9 S9 A7 A3 K6 J6 | T4 R0 V3 N6 S6 F9 Y0 O2 N6 A6 R0 B9 A2 N4 V7 X4 U1 V6 K8 W4 S6 I0 U8 V2 W9 W5 M8 A4 W5 V2 N4 N6 D4 D0 T2 G2 N4 U6 E6 M8 G2 A5 J9 I2 D4 G1 U2 E1 J6 V3 I2 H0 W2 Q1 R7 U9 A1 A2 O9 L0 W5 U8 J2 B8 J0 S9 X4 V4 P3 T2 W2 F9 S9 A7 A3 K6 J6 | THE FEAR OF THE LORD IS THE BEGINNING OF WISDOM AND KNOWLEDGE OF THE HOLY ONE IS UNDERSTANDING | copiale | copiale | substitution | {
"type": "keyword",
"value": "MYSTERY"
} | advanced | en | 154 | 230 | cipher_museum | 2.0 | public | null | null |
kryha-v3-0223 | ETRBWAYOSXPLOG | ETRBWAYOSXPLOG | THE SIEGE BEGINS | kryha | kryha | machine | {
"type": "keyword",
"value": "PRAGUE"
} | expert | en | 14 | 14 | cipher_museum | 2.0 | public | null | null |
commercial-code-v3-0100 | ZUZUZ LAZUZ QAZUZ QAZUZ BAZUZ RAZUZ BEZUZ GAZUZ PAZUZ XUZUZ ZUZUZ NAZUZ BAZUZ RAZUZ ZAZUZ XUZUZ ZUZUZ TAZUZ WAZUZ SAZUZ TAZUZ SAZUZ XAZUZ GAZUZ FAZUZ XUZUZ JABAB ZUZUZ DEZUZ GAZUZ XUZUZ ZUZUZ XAZUZ KAZUZ SAZUZ BEZUZ PAZUZ FAZUZ XUZUZ ZUZUZ BAZUZ DAZUZ ZAZUZ XUZUZ KOBAB ZUZUZ BAZUZ DAZUZ DAZUZ SAZUZ WAZUZ FAZUZ LAZUZ RA... | ZUZUZ LAZUZ QAZUZ QAZUZ BAZUZ RAZUZ BEZUZ GAZUZ PAZUZ XUZUZ ZUZUZ NAZUZ BAZUZ RAZUZ ZAZUZ XUZUZ ZUZUZ TAZUZ WAZUZ SAZUZ TAZUZ SAZUZ XAZUZ GAZUZ FAZUZ XUZUZ JABAB ZUZUZ DEZUZ GAZUZ XUZUZ ZUZUZ XAZUZ KAZUZ SAZUZ BEZUZ PAZUZ FAZUZ XUZUZ ZUZUZ BAZUZ DAZUZ ZAZUZ XUZUZ KOBAB ZUZUZ BAZUZ DAZUZ DAZUZ SAZUZ WAZUZ FAZUZ LAZUZ RA... | IMMANUEL KANT PROPOSED THAT WE SHOULD ACT ONLY ACCORDING TO THAT MAXIM BY WHICH WE CAN AT THE SAME TIME WILL THAT IT SHOULD BECOME A UNIVERSAL LAW THIS CATEGORICAL IMPERATIVE DEFINES MORAL DUTY | commercial_code | commercial_code | codebook | {
"type": "none",
"value": null
} | expert | en | 860 | 1,031 | cipher_museum | 2.0 | public | null | null |
fialka-v2-0262 | RUJAEQTBJFTXKDCCKPGXB | RUJAEQTBJFTXKDCCKPGXB | BRIDGE DESTROYED AT DAWN | fialka | fialka | machine | {
"type": "seed",
"value": "SOVIET"
} | expert | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
one-time-pad-v3-0013 | TIGFEXZSMRCDGEFDKEVXX | TIGFEXZSMRCDGEFDKEVXX | THE CASTLE IS SURROUNDED | one_time_pad | one_time_pad | stream | {
"type": "pad",
"value": "ABCDEFGH (repeating)"
} | expert | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
bifid-v3-0286 | SFRBECTEEPNATHBHXN | SFRBECTEEPNATHBHXN | THE ORACLE HAS SPOKEN | bifid | bifid | fractionation | {
"type": "keyword",
"value": "FREEDOM"
} | advanced | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
cda-0016011 | THAN-ZIE / LIN / DZEH / NA-AS-TSO-SI / DZEH / DIBEH / DIBEH / WOL-LA-CHEE / AH-JAH / DZEH / GLOE-IH / WOL-LA-CHEE / DIBEH / LIN / TKIN / BE / BE / DZEH / TSAH / SHUSH / NO-DA-IH / THAN-ZIE / TSAH / A-KHA / THAN-ZIE / DIB... | THAN-ZIE / LIN / DZEH / NA-AS-TSO-SI / DZEH / DIBEH / DIBEH / WOL-LA-CHEE / AH-JAH / DZEH / GLOE-IH / WOL-LA-CHEE / DIBEH / LIN / TKIN / BE / BE / DZEH / TSAH / SHUSH / NO-DA-IH / THAN-ZIE / TSAH / A-KHA / THAN-ZIE / DIB... | THE MESSAGE WAS HIDDEN BUT NOT SECURE THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER SLOWLY | navajo_code | navajo_code | null | {} | hard | en | 196 | 196 | synthetic_educational | null | null | [
"codebook_frequency",
"word_list_attack"
] | Navajo Code Talker cipher: Navajo words represent English letters. |
cda-0002131 | TPBWP RLRWU FRRNP ECVKN DGBQS VBNGF QZCMN CMUMS ANYZR JQCNR TIJLD NOTDJ BQEOZ RJQCN OHMCB TDBDR FLECF PBTMA EFOUV SQLTU NFSTP LSNJM KZPPJ FQARC HJHZD ATOGJ QCAVS BMSQP JPGIS AYADD V | TPBWP RLRWU FRRNP ECVKN DGBQS VBNGF QZCMN CMUMS ANYZR JQCNR TIJLD NOTDJ BQEOZ RJQCN OHMCB TDBDR FLECF PBTMA EFOUV SQLTU NFSTP LSNJM KZPPJ FQARC HJHZD ATOGJ QCAVS BMSQP JPGIS AYADD V | A STRONG CLAIM NEEDS STRONG EVIDENCE OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE FAIL CLOSED IS A POSTURE NOT A SLOGAN HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS | beaufort | beaufort | null | {
"key": "THUNDER"
} | hard | en | 151 | 151 | synthetic_educational | null | null | [
"kasiski_examination",
"friedman_test",
"index_of_coincidence"
] | Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption). |
vic-v2-0057 | 3839108542836809113489786186803839106048983919581189422280919290583867928791080864918318690319286790486708042 | 3839108542836809113489786186803839106048983919581189422280919290583867928791080864918318690319286790486708042 | WITH MALICE TOWARD NONE WITH CHARITY FOR ALL LET US BIND UP THE NATIONS WOUNDS AND HEAL | vic | vic | substitution | {
"type": "keyword",
"value": "HOLLOW"
} | advanced | en | 109 | 109 | cipher_museum | 2.0 | public | null | null |
culper-ring-v2-0109 | 998 822 804 999 998 819 807 804 817 804 805 814 817 804 999 100 998 817 804 815 817 804 818 804 813 819 800 819 808 821 804 818 999 101 100 998 820 813 808 819 804 803 999 998 818 819 800 819 804 818 999 101 998 800 812 804 817 808 802 800 999 104 196 304 998 800 818 818 804 812 801 811 804 803 999 998 800 815 815 804 ... | 998 822 804 999 998 819 807 804 817 804 805 814 817 804 999 100 998 817 804 815 817 804 818 804 813 819 800 819 808 821 804 818 999 101 100 998 820 813 808 819 804 803 999 998 818 819 800 819 804 818 999 101 998 800 812 804 817 808 802 800 999 104 196 304 998 800 818 818 804 812 801 811 804 803 999 998 800 815 815 804 ... | 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 | culper_ring | culper_ring | codebook | {
"type": "none",
"value": null
} | expert | en | 489 | 651 | cipher_museum | 2.0 | public | null | null |
cda-0016090 | ASCYZ ALEIZ ARODU SEDBY SPARX ANSTO ENCRX PTMEZ SAGEX ENTRO PYMEA SURES UNCER TAINT YINAX ISTRZ BUTIO NTHEZ NETIM EPADI STHEZ RETIC ALLYU NBREA KABLE IFUSX DCORZ ECTLZ | ASCYZ ALEIZ ARODU SEDBY SPARX ANSTO ENCRX PTMEZ SAGEX ENTRO PYMEA SURES UNCER TAINT YINAX ISTRZ BUTIO NTHEZ NETIM EPADI STHEZ RETIC ALLYU NBREA KABLE IFUSX DCORZ ECTLZ | A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY | commercial_code | commercial_code | null | {} | hard | en | 140 | 140 | synthetic_educational | null | null | [
"codebook_frequency",
"five_letter_group_analysis"
] | Commercial code: five-letter groups from a codebook, often ending in X or Z. |
geez-monastic-189 | ZFTTDJDQYEVGHTPGHQZEC | ZFTTDJDQYEVGHTPGHQZEC | SUPPLY LINE COMPROMISED | geez_monastic | geez_monastic | substitution | {
"type": "keyword",
"value": "MUSEUM"
} | advanced | en | 21 | 21 | cipher_museum | 0.2 | public | null | null |
purple-v2-0166 | HAJDTHOCXFTOTMVMFGHRADXQ | HAJDTHOCXFTOTMVMFGHRADXQ | NORTH STAR HOLDS FIRM COURSE | purple | purple | machine | {
"type": "seed",
"value": "YAMAMOTO"
} | expert | en | 24 | 24 | cipher_museum | 2.0 | public | null | null |
kryha-v3-0014 | NDELGPJQXOLLBVRLSS | NDELGPJQXOLLBVRLSS | LOWER THE DRAWBRIDGE | kryha | kryha | machine | {
"type": "keyword",
"value": "MUNICH"
} | expert | en | 18 | 18 | cipher_museum | 2.0 | public | null | null |
kama-sutra-v2-0356 | QTWXHCWGETGF UKYSZGLF EQWE EQT ZYETMMZRTYUT GTJKGE ZF WUUCGWET WYX GTHCZGTF ZLLTXZWET FAZSE WUEZKY | QTWXHCWGETGF UKYSZGLF EQWE EQT ZYETMMZRTYUT GTJKGE ZF WUUCGWET WYX GTHCZGTF ZLLTXZWET FAZSE WUEZKY | HEADQUARTERS CONFIRMS THAT THE INTELLIGENCE REPORT IS ACCURATE AND REQUIRES IMMEDIATE SWIFT ACTION | kama_sutra | kama_sutra | substitution | {
"type": "keyword",
"value": "INDIA"
} | intermediate | en | 86 | 98 | cipher_museum | 2.0 | public | null | null |
vigenere-v2-1786 | WZDCPTHGUKIZFBXI | WZDCPTHGUKIZFBXI | DIVIDE AND CONQUER | vigenere | vigenere | polyalphabetic | {
"type": "keyword",
"value": "TRIUMPH"
} | intermediate | en | 16 | 16 | cipher_museum | 2.0 | public | null | null |
monoalphabetic-v2-0549 | QACP LIKUR LGG QK QACJR KVJ PRGT IR QOSR LJE CQ HSPQ TKGGKV LP JCYAQ QAR ELX | QACP LIKUR LGG QK QACJR KVJ PRGT IR QOSR LJE CQ HSPQ TKGGKV LP JCYAQ QAR ELX | THIS ABOVE ALL TO THINE OWN SELF BE TRUE AND IT MUST FOLLOW AS NIGHT THE DAY | monoalphabetic | monoalphabetic | substitution | {
"type": "keyword",
"value": "LIBERTY"
} | beginner | en | 60 | 76 | cipher_museum | 2.0 | public | null | null |
gronsfeld-v2-0468 | NDWFZVHJUXGVHVCTZFZKFKJHMFGFMCFUMLADLUONSOJACFUXDNSHILLPGJKKZWMVVBVUONMLUWNT | NDWFZVHJUXGVHVCTZFZKFKJHMFGFMCFUMLADLUONSOJACFUXDNSHILLPGJKKZWMVVBVUONMLUWNT | MARY QUEEN OF SCOTS WAS BEHEADED AFTER HER CIPHER LETTERS WERE DECODED BY THOMAS PHELIPPES | gronsfeld | gronsfeld | polyalphabetic | {
"type": "numeric",
"value": "13579"
} | intermediate | en | 76 | 76 | cipher_museum | 2.0 | public | null | null |
sigaba-v3-0353 | BBIDQDQUVHNBHZXKSRURE | BBIDQDQUVHNBHZXKSRURE | THE TELEGRAPH TRANSMITS | sigaba | sigaba | machine | {
"type": "seed",
"value": "LIBERTY"
} | expert | en | 21 | 21 | cipher_museum | 2.0 | public | null | null |
enigma-362 | NPZTLDZYRS | NPZTLDZYRS | FLEE AT ONCE | enigma | enigma | machine | {
"type": "rotor_start",
"value": "KEY"
} | expert | en | 10 | 10 | cipher_museum | 0.2 | public | null | null |
kl7-072 | RGUCUJZPNALHCERC | RGUCUJZPNALHCERC | CIPHER KEY CHANGED | kl7 | kl7 | machine | {
"type": "seed",
"value": "CIPHER"
} | expert | en | 16 | 16 | cipher_museum | 0.2 | public | null | null |
cda-0021413 | 1 12 1 14 20 21 18 9 14 7 2 18 15 11 5 5 14 9 7 13 1 23 9 20 8 3 18 9 2 19 1 14 4 20 8 5 2 15 13 2 5 13 1 3 8 9 14 5 | 1 12 1 14 20 21 18 9 14 7 2 18 15 11 5 5 14 9 7 13 1 23 9 20 8 3 18 9 2 19 1 14 4 20 8 5 2 15 13 2 5 13 1 3 8 9 14 5 | ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE | aeneas_tacticus | aeneas_tacticus | null | {} | medium | en | 48 | 48 | synthetic_educational | null | null | [
"sequential_number_decode",
"frequency_analysis"
] | Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26. |
cda-0004587 | HBNJXBNRCNUPRVCXESMVSPATVISRQCAGTZTHGQXIQUESXTGY | HBNJXBNRCNUPRVCXESMVSPATVISRQCAGTZTHGQXIQUESXTGY | AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER | autokey | autokey | null | {
"primer": "HONEST"
} | medium | en | 48 | 48 | synthetic_educational | null | null | [
"running_key_analysis",
"index_of_coincidence"
] | Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack. |
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