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81 values
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unknown
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7 values
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8 values
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6
1.09k
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32 values
confederate-vigenere-v3-0173
UITDUBBEJMTCQRGKRBUWQQVHJMXVXJRWYZQBSVADKCTHXGROVKVPABBYVZXHEHFSRVUVRURRCWIPOHVPV
UITDUBBEJMTCQRGKRBUWQQVHJMXVXJRWYZQBSVADKCTHXGROVKVPABBYVZXHEHFSRVUVRURRCWIPOHVPV
DARWIN OBSERVED THAT SPECIES EVOLVE THROUGH NATURAL SELECTION OVER VAST SPANS OF GEOLOGIC TIME
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "RICHMOND" }
intermediate
en
81
81
cipher_museum
2.0
public
null
null
cda-0018391
6.3.7 4.1.4 16.3.3 13.6.9 3.6.2 14.6.4 9.1.3 3.3.2 11.6.9 18.1.10 13.1.3 17.4.9 17.3.5 3.3.4 5.5.1 6.2.2 6.4.10 3.2.9 7.2.6 20.1.3 8.3.3 16.4.6 9.5.6 8.6.4 3.4.10 6.1.7 20.2.7 17.3.9 6.5.8 19.2.5 4.1.3 16.6.4 5.4.7 5.6.7 7.5.7 7.6.2 18.1.4 4.2.5 9.4.8 9.5.10 8.5.5 1.2.8 11.3.7 19.2.9 12.1.8 1.3.10 10.4.2
6.3.7 4.1.4 16.3.3 13.6.9 3.6.2 14.6.4 9.1.3 3.3.2 11.6.9 18.1.10 13.1.3 17.4.9 17.3.5 3.3.4 5.5.1 6.2.2 6.4.10 3.2.9 7.2.6 20.1.3 8.3.3 16.4.6 9.5.6 8.6.4 3.4.10 6.1.7 20.2.7 17.3.9 6.5.8 19.2.5 4.1.3 16.6.4 5.4.7 5.6.7 7.5.7 7.6.2 18.1.4 4.2.5 9.4.8 9.5.10 8.5.5 1.2.8 11.3.7 19.2.9 12.1.8 1.3.10 10.4.2
A TRANSPARENT TOOL SHOULD SHOW ITS REASONING CERTAINLY
arnold_andre
arnold_andre
null
{}
medium
en
47
47
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Arnold-André book cipher: coordinates (page.section.word) referencing a shared text.
cda-0002530
NOVY PYAGNQ WF O BCFGHES NCG N FYBUOA
NOVY PYAGNQ WF O BCFGHES NCG N FYBUOA
FAIL CLOSED IS A POSTURE NOT A SLOGAN
porta
porta
null
{ "key": "LIBRARY" }
medium
en
30
30
synthetic_educational
null
null
[ "kasiski_examination", "index_of_coincidence" ]
Porta: 13-row table polyalphabetic cipher; reciprocal (encrypt = decrypt).
cda-0003689
SNVYP YBFRQ VFNCB FGHER ABGNF YBTNA TEBAF SRYQH FRFNQ VTVGF RDHRA PRNFG URERC RNGVA TXRL
SNVYP YBFRQ VFNCB FGHER ABGNF YBTNA TEBAF SRYQH FRFNQ VTVGF RDHRA PRNFG URERC RNGVA TXRL
FAIL CLOSED IS A POSTURE NOT A SLOGAN GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY
rot13
rot13
null
{ "shift": 13 }
medium
en
74
74
synthetic_educational
null
null
[ "brute_force_26", "self_inverse_check" ]
ROT-13 is Caesar with shift 13 — it is its own inverse.
cda-0020772
AAAA AABA BAAA AAAA BBAA BAAB ABAA BBBA AAAA BAAA ABBA AAAB BAAA AABB AAAA ABBA BABA ABAA BAAA ABAA ABBA AABA AAAA BBAA BABB AAAA ABAB AAAB AAAB AABA AABB BAAA BABA AAAA BAAA AAAA BBAA ABAA AAAA BBAA AAAB BBAA BAAA BBBA ABAA AAAA BABB ABAB ABBA AAAB AABA AABA BBAA AAAA AABA AABB BABA AAAB BAAA ABAA AAAB BABA AAAA BABA ...
AAAA AABA BAAA AAAA BBAA BAAB ABAA BBBA AAAA BAAA ABBA AAAB BAAA AABB AAAA ABBA BABA ABAA BAAA ABAA ABBA AABA AAAA BBAA BABB AAAA ABAB AAAB AAAB AABA AABB BAAA BABA AAAA BAAA AAAA BBAA ABAA AAAA BBAA AAAB BBAA BAAA BBBA ABAA AAAA BABB ABAB ABBA AAAB AABA AABA BBAA AAAA AABA AABB BABA AAAB BAAA ABAA AAAB BABA AAAA BABA ...
ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX TODAY
bacon_cipher
bacon_cipher
null
{}
hard
en
600
600
synthetic_educational
null
null
[ "five_bit_decode", "ab_frequency_analysis" ]
Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.
vigenere-v3-1360
VVYJETEVSXVCXIGG
VVYJETEVSXVCXIGG
THE SENATE DECREES
vigenere
vigenere
polyalphabetic
{ "type": "keyword", "value": "COURAGE" }
intermediate
en
16
16
cipher_museum
2.0
public
null
null
chaocipher-223
DWLSXTZBHYRIYTEDMVVMTBHRWTWENCNCXTEUBYWEWFHIRMA
DWLSXTZBHYRIYTEDMVVMTBHRWTWENCNCXTEUBYWEWFHIRMA
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG NEAR THE RIVER
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "MUSEUM" }
advanced
en
47
47
cipher_museum
0.2
public
null
null
jn25-v3-0274
21231 21239 21248 21239 21242 21235 21246 21243 21232 21239 21242 21247 21235 21248 21247 21235 21242 21237 21232 21239 21238 21244 21249 21244 21232 21239 21243 21239 21235 21244 21232 21242 21249 21255 21231 21232 21231 21239 21249 21242 21231 21233 21235 21237 21255 21244 21244 21233 21248 21231 21235 21243 21233 21...
21231 21239 21248 21239 21242 21235 21246 21243 21232 21239 21242 21247 21235 21248 21247 21235 21242 21237 21232 21239 21238 21244 21249 21244 21232 21239 21243 21239 21235 21244 21232 21242 21249 21255 21231 21232 21231 21239 21249 21242 21231 21233 21235 21237 21255 21244 21244 21233 21248 21231 21235 21243 21233 21...
GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN
jn25
jn25
codebook
{ "type": "additive", "value": "11235" }
expert
en
370
443
cipher_museum
2.0
public
null
null
confederate-vigenere-v3-0286
WPBLIDLAZSSIITSZAXOIQBPBSHFZPEQOBQRIWOUEWQLVALBEWYWUBMXLVDNEFMQWJDKBQRSCYTMF
WPBLIDLAZSSIITSZAXOIQBPBSHFZPEQOBQRIWOUEWQLVALBEWYWUBMXLVDNEFMQWJDKBQRSCYTMF
THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "DIXIE" }
intermediate
en
76
76
cipher_museum
2.0
public
null
null
vigenere-v2-0887
NIWECKWLLWEEVCD
NIWECKWLLWEEVCD
CAVALRY ADVANCES
vigenere
vigenere
polyalphabetic
{ "type": "keyword", "value": "LIBERTY" }
intermediate
en
15
15
cipher_museum
2.0
public
null
null
red-type-a-v3-0169
MTOBEQTLUEBCAZWEGXIDWGEKXUKTCPUAPIAQELRCIWNEVAQRAJHAKBYYKIVKQILOYBMOUQQETIL
MTOBEQTLUEBCAZWEGXIDWGEKXUKTCPUAPIAQELRCIWNEVAQRAJHAKBYYKIVKQILOYBMOUQQETIL
THE BATTLE OF GETTYSBURG LASTED THREE DAYS AND COST OVER FIFTY THOUSAND CASUALTIES TOTAL
red_type_a
red_type_a
machine
{ "type": "keyword", "value": "YAMATO" }
advanced
en
75
75
cipher_museum
2.0
public
null
null
stager-route-223
TCNMRZERIAYTPFKHEBOSHDRVETOEOXRQUOJVLGHRXENAEUWI
TCNMRZERIAYTPFKHEBOSHDRVETOEOXRQUOJVLGHRXENAEUWI
THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG NEAR THE RIVER
stager_route
stager_route
transposition
{ "type": "integer", "value": 6 }
expert
en
48
48
cipher_museum
0.2
public
null
null
stager-route-v3-0416
TJFFNTHVERINTTOVRSUDENIOYIOREHECORNDUECVEMWAERTHENEETSEETMTVEWNYTCAIMATROENMDHOILENNRETIHNOINHEYDTSITUATENHDSINSESPNRECNAHTEETOLAGEAPETXUEGSTGLFEIEERPRAETGDSIEHOENSXXGENFESGOTHONNO
TJFFNTHVERINTTOVRSUDENIOYIOREHECORNDUECVEMWAERTHENEETSEETMTVEWNYTCAIMATROENMDHOILENNRETIHNOINHEYDTSITUATENHDSINSESPNRECNAHTEETOLAGEAPETXUEGSTGLFEIEERPRAETGDSIEHOENSXXGENFESGOTHONNO
THE VENONA PROJECT WHICH RAN FROM NINETEEN FORTY THREE TO NINETEEN EIGHTY DECRYPTED THOUSANDS OF SOVIET INTELLIGENCE MESSAGES REVEALING THE IDENTITIES OF NUMEROUS AGENTS WHO HAD PENETRATED THE US GOVERNMENT
stager_route
stager_route
transposition
{ "type": "integer", "value": 12 }
expert
en
180
180
cipher_museum
2.0
public
null
null
kama-sutra-123
VMY YUNIY MUZ IUGPYP
VMY YUNIY MUZ IUGPYP
THE EAGLE HAS LANDED
kama_sutra
kama_sutra
substitution
{ "type": "keyword", "value": "SECRET" }
intermediate
en
17
20
cipher_museum
0.2
public
null
null
sigaba-v3-0274
RKFHLPKJYAQNCLXJWZGHJTOPQXLQBVJUDDJZDJYRVQOCYLRBNIRPZLEJGBCFUUZBEWDOOMFTXR
RKFHLPKJYAQNCLXJWZGHJTOPQXLQBVJUDDJZDJYRVQOCYLRBNIRPZLEJGBCFUUZBEWDOOMFTXR
GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN
sigaba
sigaba
machine
{ "type": "seed", "value": "FREEDOM" }
expert
en
74
74
cipher_museum
2.0
public
null
null
cda-0016067
┐· ⌐ K K L ┌· ─ ⌒ ┘· ┌· Γ X r· L └ ┐· ¬ ┌· L ⌐ ┐ ┌ ┘· ─ ┘· ⌐ └ ┐· r· ⌐ ¬ L K Γ· r X X· ¬ X K Γ· K X· K Γ· ┘· ─ r· Γ· X K ┘· ┌· Γ· r ⌐ └ r Γ· ┐· r· L ┌· X ⌐ ┌· L K L ⌐ r r· L ┌· X ─ ┘· K ┐· ┌· ┘· K L r K Γ· ┘· ─ ¬· ┘· ┘· Γ L Γ X· r ⌐ K Γ· ┘· ─ ⌐ └ K ┘· ┘· └ X L ⌣ ┐· └ ⌐ Γ· ─ K r· L Γ· ┌· └ Γ· ┌ Γ· K X
┐· ⌐ K K L ┌· ─ ⌒ ┘· ┌· Γ X r· L └ ┐· ¬ ┌· L ⌐ ┐ ┌ ┘· ─ ┘· ⌐ └ ┐· r· ⌐ ¬ L K Γ· r X X· ¬ X K Γ· K X· K Γ· ┘· ─ r· Γ· X K ┘· ┌· Γ· r ⌐ └ r Γ· ┐· r· L ┌· X ⌐ ┌· L K L ⌐ r r· L ┌· X ─ ┘· K ┐· ┌· ┘· K L r K Γ· ┘· ─ ¬· ┘· ┘· Γ L Γ X· r ⌐ K Γ· ┘· ─ ⌐ └ K ┘· ┘· └ X L ⌣ ┐· └ ⌐ Γ· ─ K r· L Γ· ┌· └ Γ· ┌ Γ· K X
PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS
pigpen
pigpen
null
{}
medium
en
50
50
synthetic_educational
null
null
[ "symbol_frequency", "grid_position_decode" ]
Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids.
cda-0010947
QNEFYQMNCFKG BAGUABA PCBJAFCY UEB QELQMKH LVMEUKRW BKA KRZQU QN COMECKBYHPA KM C AZANKR SGKO YOGO APKAUYWERCJ YQETK QUPHEUH YXOWL JJSKLK
QNEFYQMNCFKG BAGUABA PCBJAFCY UEB QELQMKH LVMEUKRW BKA KRZQU QN COMECKBYHPA KM C AZANKR SGKO YOGO APKAUYWERCJ YQETK QUPHEUH YXOWL JJSKLK
CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING THE INDEX OF COINCIDENCE IS A USEFUL CLUE GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS
beaufort
beaufort
null
{ "key": "SECURE" }
hard
en
117
117
synthetic_educational
null
null
[]
confederate-vigenere-v3-0238
WIUIXLWKEMWPLCXUMMZIVMKBEWQLV
WIUIXLWKEMWPLCXUMMZIVMKBEWQLV
TAXATION WITHOUT REPRESENTATION
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "DIXIE" }
intermediate
en
29
29
cipher_museum
2.0
public
null
null
jn25-v3-0014
26191 26194 26102 26184 26197 26199 26187 26184 26183 26197 26180 26102 26181 26197 26188 26183 26186 26184
26191 26194 26102 26184 26197 26199 26187 26184 26183 26197 26180 26102 26181 26197 26188 26183 26186 26184
LOWER THE DRAWBRIDGE
jn25
jn25
codebook
{ "type": "additive", "value": "16180" }
expert
en
90
107
cipher_museum
2.0
public
null
null
cda-0010572
QBAB GPBA SHFR BOSH FPNG VBAJ VGUR APEL CGVB ARIR ELFL FGRZ ARRQ FNAU BARF GGUE RNGZ BQRY
QBAB GPBA SHFR BOSH FPNG VBAJ VGUR APEL CGVB ARIR ELFL FGRZ ARRQ FNAU BARF GGUE RNGZ BQRY
DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION EVERY SYSTEM NEEDS AN HONEST THREAT MODEL
rot13
rot13
null
{ "shift": 13 }
medium
en
72
72
synthetic_educational
null
null
[]
scytale-v3-0347
TEPLFLSXXXXHAPEALXXXXX
TEPLFLSXXXXHAPEALXXXXX
THE APPLE FALLS
scytale
scytale
transposition
{ "type": "integer", "value": 11 }
intermediate
en
22
22
cipher_museum
2.0
public
null
null
four-square-v3-0414
FLDDRIHQCRSTCKKCQX
FLDDRIHQCRSTCKKCQX
OLD IRONSIDES HOLDS
four_square
four_square
polygraphic
{ "key1": "WISDOM", "key2": "COURAGE" }
advanced
en
18
18
cipher_museum
2.0
public
null
null
nihilist-217
56 44 42 34 75 56 47 56 65 54 54 26 74 47 58 63 26 75 34 66 25 28 66 47 75 56 34 43 36 44 56 47 75 44 44 55 57 52 57 44 25 57 44 56 66 25 38 42 47 75 36 24 52 57 64
56 44 42 34 75 56 47 56 65 54 54 26 74 47 58 63 26 75 34 66 25 28 66 47 75 56 34 43 36 44 56 47 75 44 44 55 57 52 57 44 25 57 44 56 66 25 38 42 47 75 36 24 52 57 64
THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS LIFE OR DEATH
nihilist
nihilist
fractionation
{ "polybius": "ENIGMA", "keyword": "NIHIL" }
advanced
en
110
164
cipher_museum
0.2
public
null
null
purple-v2-0344
VZVOXYCQDIUIQKANYNMEEJNDJNAYEKQNDTLPVLBYBXHQBJEOVRJQSOFJWAKUDQVXEVQRFJQXURKKGK
VZVOXYCQDIUIQKANYNMEEJNDJNAYEKQNDTLPVLBYBXHQBJEOVRJQSOFJWAKUDQVXEVQRFJQXURKKGK
YOUR MISSION IF YOU CHOOSE TO ACCEPT IT IS TO EXTRACT THE AGENT FROM BEHIND ENEMY LINES TONIGHT
purple
purple
machine
{ "type": "seed", "value": "SAKURA" }
expert
en
78
78
cipher_museum
2.0
public
null
null
straddling-checkerboard-v2-0163
5121726709681207255162223725432015
5121726709681207255162223725432015
SICUT PATRIBUS SIT DEUS NOBIS
straddling_checkerboard
straddling_checkerboard
substitution
{ "type": "top_row", "value": "LIONSTRACE" }
advanced
en
34
34
cipher_museum
2.0
public
null
null
lorenz-v2-0361
THEFUNDAMENTALPROBLEMOFCOMMUNICATIONISTHATOFREPRODUCINGATONEPOINTEITHEREXACTLYORAPPROXIMATELYAMESSAGESELECTEDATANOTHERPOINTFREQUENTLYTHEMESSAGESHAVEMEANINGANDREFERTOPHYSICALCONCEPTS
THEFUNDAMENTALPROBLEMOFCOMMUNICATIONISTHATOFREPRODUCINGATONEPOINTEITHEREXACTLYORAPPROXIMATELYAMESSAGESELECTEDATANOTHERPOINTFREQUENTLYTHEMESSAGESHAVEMEANINGANDREFERTOPHYSICALCONCEPTS
THE FUNDAMENTAL PROBLEM OF COMMUNICATION IS THAT OF REPRODUCING AT ONE POINT EITHER EXACTLY OR APPROXIMATELY A MESSAGE SELECTED AT ANOTHER POINT FREQUENTLY THE MESSAGES HAVE MEANING AND REFER TO PHYSICAL CONCEPTS
lorenz
lorenz
machine
{ "type": "seed", "value": "COLOSSUS" }
expert
en
181
181
cipher_museum
2.0
public
null
null
vernam-v2-0024
TIGZEQRZPJFPQNFH
TIGZEQRZPJFPQNFH
THE WALLS HAVE EARS
vernam
vernam
stream
{ "type": "pad", "value": "ABCDEFGH (repeating)" }
expert
en
16
16
cipher_museum
2.0
public
null
null
voynich-render-031
jd cife gcdxd gqzgcx gi ad xdfs dvkedrg gcog off ldr oqd yqdogde dmzof
jd cife gcdxd gqzgcx gi ad xdfs dvkedrg gcog off ldr oqd yqdogde dmzof
WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL
voynich_render
voynich_render
substitution
{ "type": "none", "value": null }
expert
en
57
70
cipher_museum
0.2
public
null
null
cda-0021641
SHUS HGAH NODA IHTH ANZI EDZE HMAE AKHA GAHM OASI DZEH GLOE IHAK HAGA HKLI ZZIE DIBE HAKH ATSA HDIB EHYA ZZIE TSAH ASZI HGLO EIHL INDZ EHTS AHTH ANZI ELIN DZEH KLIZ ZIED ZEHT SAHA SZIH DIBE HCLA GIAI HWOL LACH EEMO ASID ZEHT KIND IBEH DIBE HNAA STSO SIWO LLAC HEED IBEH YAZZ IE
SHUS HGAH NODA IHTH ANZI EDZE HMAE AKHA GAHM OASI DZEH GLOE IHAK HAGA HKLI ZZIE DIBE HAKH ATSA HDIB EHYA ZZIE TSAH ASZI HGLO EIHL INDZ EHTS AHTH ANZI ELIN DZEH KLIZ ZIED ZEHT SAHA SZIH DIBE HCLA GIAI HWOL LACH EEMO ASID ZEHT KIND IBEH DIBE HNAA STSO SIWO LLAC HEED IBEH YAZZ IE
BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL THE VIGENERE CIPHER USES A REPEATING KEYWORD ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX
navajo_code
navajo_code
null
{}
hard
en
222
222
synthetic_educational
null
null
[ "codebook_frequency", "word_list_attack" ]
Navajo Code Talker cipher: Navajo words represent English letters.
chaocipher-v2-0168
PXKRLRIBDSKPCVBXJNZZDGSWDJACSKJPMLHCSPQDVTTAXVS
PXKRLRIBDSKPCVBXJNZZDGSWDJACSKJPMLHCSPQDVTTAXVS
THE COURSE OF TRUE LOVE NEVER DID RUN SMOOTH THROUGH AGES
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "LIBERTY" }
advanced
en
47
47
cipher_museum
2.0
public
null
null
vic-v2-0022
78393837804867618688928089
78393837804867618688928089
DIVIDE AND CONQUER
vic
vic
substitution
{ "type": "keyword", "value": "HOLLOW" }
advanced
en
26
26
cipher_museum
2.0
public
null
null
cda-0016457
ABBB AABB ABAB ABAB ABBA AAAA BABA AABA ABBB AAAB AABA AABB AAAA ABAA BBAB AAAB BAAB AAAA ABBA BABA AABA ABAA BABA ABAA ABAA BAAA ABAA ABAA AAAB AAAB ABBB AAAA AAAB AAAB AAAA BAAA BABB ABAA BABA BBAA BAAB BABA BBAA AABA ABAA BAAA ABAA ABAA BABB AAAA ABBA BABA BBAB BABA BBAA AABA ABAA BAAB BABA ABAB ABAA ABAA BBAA BAAB ...
ABBB AABB ABAB ABAB ABBA AAAA BABA AABA ABBB AAAB AABA AABB AAAA ABAA BBAB AAAB BAAB AAAA ABBA BABA AABA ABAA BABA ABAA ABAA BAAA ABAA ABAA AAAB AAAB ABBB AAAA AAAB AAAB AAAA BAAA BABB ABAA BABA BBAA BAAB BABA BBAA AABA ABAA BAAA ABAA ABAA BABB AAAA ABBA BABA BBAB BABA BBAA AABA ABAA BAAB BABA ABAB ABAA ABAA BBAA BAAB ...
POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY
bacon_cipher
bacon_cipher
null
{}
hard
en
745
745
synthetic_educational
null
null
[ "five_bit_decode", "ab_frequency_analysis" ]
Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.
great-cipher-v3-0063
157 174 174 154 175 108 169 137 119 166 122 131 170 102 168 172 141 152 128 116 174 157 131 119 106 181 143 170 156 104 175 158 154 113 146 129 108 178 171 127 142 166 146 167 152 111 154 136 170 161 120 166 129 159 130 164 166 143
157 174 174 154 175 108 169 137 119 166 122 131 170 102 168 172 141 152 128 116 174 157 131 119 106 181 143 170 156 104 175 158 154 113 146 129 108 178 171 127 142 166 146 167 152 111 154 136 170 161 120 166 129 159 130 164 166 143
ON D DAY THE ALLIED FORCES LANDED ON FIVE NORMANDY BEACHES IN THE GREATEST SEABORNE INVASION
great_cipher
great_cipher
nomenclator
{ "type": "seed", "value": "VERSAILLES" }
expert
en
174
231
cipher_museum
2.0
public
null
null
chinese-telegraph-045
0538 0472 0012 1599 0285 0856 0918 1421 1821 0285 1421 0074 0285 0408 1503 0856 1421 0918 0347 0538 0408 0472 1421 1346 0012 0538 0219 1421 0472 0285 0156 0012 1024 1421 0012 0538 0856 1421 0918 1421 0472 0285 0156 1255 0285 1672
0538 0472 0012 1599 0285 0856 0918 1421 1821 0285 1421 0074 0285 0408 1503 0856 1421 0918 0347 0538 0408 0472 1421 1346 0012 0538 0219 1421 0472 0285 0156 0012 1024 1421 0012 0538 0856 1421 0918 1421 0472 0285 0156 1255 0285 1672
I HAVE NOT YET BEGUN TO FIGHT SAID THE CAPTAIN TO THE CREW
chinese_telegraph
chinese_telegraph
codebook
{ "type": "none", "value": null }
expert
en
184
229
cipher_museum
0.2
public
null
null
fialka-v2-0195
JOSXACAFZTLXRGQRRZWRJJBMWDAGJWIXXGBJORMRNLVNLSPVAXZTCEIOWUIBXXMSCVUYCISVSCLH
JOSXACAFZTLXRGQRRZWRJJBMWDAGJWIXXGBJORMRNLVNLSPVAXZTCEIOWUIBXXMSCVUYCISVSCLH
ONCE UPON A MIDNIGHT DREARY WHILE I PONDERED WEAK AND WEARY OVER MANY A QUAINT VOLUME OF LORE
fialka
fialka
machine
{ "type": "seed", "value": "KREMLIN" }
expert
en
76
76
cipher_museum
2.0
public
null
null
bazeries-051
IEUJYGATCYKNUJMYIFCTWIMJFHCPIJNCBPEYXYJPCSPRMJCXFIXIJRWICGPR
IEUJYGATCYKNUJMYIFCTWIMJFHCPIJNCBPEYXYJPCSPRMJCXFIXIJRWICGPR
KNOWLEDGE IS POWER AND INFORMATION IS THE KEY TO VICTORY IN ANY CONFLICT
bazeries
bazeries
transposition
{ "type": "integer", "value": 42 }
advanced
en
60
60
cipher_museum
0.2
public
null
null
sigaba-v3-0142
OYAWKUZXFAJOIZLNRTM
OYAWKUZXFAJOIZLNRTM
MEASURE TWICE CUT ONCE
sigaba
sigaba
machine
{ "type": "seed", "value": "ARMY" }
expert
en
19
19
cipher_museum
2.0
public
null
null
joseon-yeokhak-v3-0264
RPYTFDTDZYPAPCNPYETYDATCLETZYLYOYTYPEJYTYPAPCNPYEAPCDATCLETZYESZXLDPOTDZYYZEPO
RPYTFDTDZYPAPCNPYETYDATCLETZYLYOYTYPEJYTYPAPCNPYEAPCDATCLETZYESZXLDPOTDZYYZEPO
GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED
joseon_yeokhak
joseon_yeokhak
substitution
{ "type": "keyword", "value": "HANGUL" }
beginner
en
78
78
cipher_museum
2.0
public
null
null
m94-v3-0205
AQFAZRESRGYWY
AQFAZRESRGYWY
FULL SAIL AHEAD
m94
m94
machine
{ "type": "seed", "value": "LIBERTY" }
expert
en
13
13
cipher_museum
2.0
public
null
null
rail-fence-v2-0126
WFAORTCSIRFTLRGEOTTTTFEFSAIEETLTOTEEEHEFUENSTEHSEROPEEBTIMIIYFHDNTEWACTIOYHLEDSERECNLSNOCUPEENSOGLREHSFTEPUEIDMRTOIUSDTQRDCOEMEAESESLRPONTNRAOUISJUERNOIOMPONRADBEIEEIOMNHRAVMRENLB
WFAORTCSIRFTLRGEOTTTTFEFSAIEETLTOTEEEHEFUENSTEHSEROPEEBTIMIIYFHDNTEWACTIOYHLEDSERECNLSNOCUPEENSOGLREHSFTEPUEIDMRTOIUSDTQRDCOEMEAESESLRPONTNRAOUISJUERNOIOMPONRADBEIEEIOMNHRAVMRENLB
WE THE PEOPLE OF THE UNITED STATES IN ORDER TO FORM A MORE PERFECT UNION ESTABLISH JUSTICE INSURE DOMESTIC TRANQUILITY PROVIDE FOR THE COMMON DEFENSE PROMOTE THE GENERAL WELFARE AND SECURE THE BLESSINGS OF LIBERTY
rail_fence
rail_fence
transposition
{ "type": "integer", "value": 7 }
intermediate
en
179
179
cipher_museum
2.0
public
null
null
kryptos-v2-0019
INKHFSDYHJGBLAZLIB
INKHFSDYHJGBLAZLIB
CONTACT HAS BEEN MADE
kryptos
kryptos
polyalphabetic
{ "type": "keyword", "value": "SHADOW" }
advanced
en
18
18
cipher_museum
2.0
public
null
null
cda-0010743
TIEIRSPIEREVAEDBTTISCTGIETGDERSNSOTEOHGRPUAENYDRINPUIYTNEHRCMDREEEYTEANTADEEEHSRAGWPREDRCLMERAAOLNSOVNVSEENEHTEVNCEEETKOEEWROIIARERSNAESNICEYMDHSRML
TIEIRSPIEREVAEDBTTISCTGIETGDERSNSOTEOHGRPUAENYDRINPUIYTNEHRCMDREEEYTEANTADEEEHSRAGWPREDRCLMERAAOLNSOVNVSEENEHTEVNCEEETKOEEWROIIARERSNAESNICEYMDHSRML
THE VIGENERE CIPHER USES A REPEATING KEYWORD PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH A STRONG CLAIM NEEDS STRONG EVIDENCE EVERY SYSTEM NEEDS AN HONEST THREAT MODEL
scytale
scytale
null
{ "cols": 4 }
hard
en
148
148
synthetic_educational
null
null
[]
cda-0007244
ERXNFLERXGNRTYMTWXEESAEXUOXICDEYLXMXKSIXORERXBXTHOVPHX
ERXNFLERXGNRTYMTWXEESAEXUOXICDEYLXMXKSIXORERXBXTHOVPHX
THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY
double_transposition
double_transposition
null
{ "key1": "JUSTICE", "key2": "PALACE" }
medium
en
54
54
synthetic_educational
null
null
[]
monoalphabetic-v3-0497
QAR HKGR ISOCRE ERRM CJ QAR CJQRGGCYRJBR LYRJBX MLPPRE UCQLG PRBORQP QK QAR KQARO PCER TKO XRLOP
QAR HKGR ISOCRE ERRM CJ QAR CJQRGGCYRJBR LYRJBX MLPPRE UCQLG PRBORQP QK QAR KQARO PCER TKO XRLOP
THE MOLE BURIED DEEP IN THE INTELLIGENCE AGENCY PASSED VITAL SECRETS TO THE OTHER SIDE FOR YEARS
monoalphabetic
monoalphabetic
substitution
{ "type": "keyword", "value": "LIBERTY" }
beginner
en
80
96
cipher_museum
2.0
public
null
null
two-square-v3-0227
RGGUELFUHRPETAVEBKOZ
RGGUELFUHRPETAVEBKOZ
THE TELESCOPE REVEALS
two_square
two_square
polygraphic
{ "key1": "TRIUMPH", "key2": "JUSTICE" }
advanced
en
20
20
cipher_museum
2.0
public
null
null
alberti-disk-v2-0603
ULSUKGHXTRXDJWIHQWSDWFRMQXCPUVJXUNFOGGEPNDDSEMCRXEZXUADTWJHYRQHQZTJSHBSBS
ULSUKGHXTRXDJWIHQWSDWFRMQXCPUVJXUNFOGGEPNDDSEMCRXEZXUADTWJHYRQHQZTJSHBSBS
ALEA IACTA EST ET CAESAR RUBICONE TRANSGRESSO BELLUM CIVILE INCIPIT PER TOTAM ROMANAM
alberti_disk
alberti_disk
disk
{ "type": "integer", "value": 11 }
expert
en
73
73
cipher_museum
2.0
public
null
null
cda-0004049
WDGGNDKDNG ADCBUXCU IQMGM XGZKTA WWRTCBUXCU K MFTQLE CNKWM XAUHM GRNKXY UPWVGRWG LRG ZHCAVYEL RAGR KGGM FDA QXBUN QT IQQXCQHALIA FW AGRWMKLU AAA ZALELR RXU AEGCMOC ABKSQXEFCQL FWLHM HGPUKLUH LHCYHKSG CR WCPRGNFGHF
WDGGNDKDNG ADCBUXCU IQMGM XGZKTA WWRTCBUXCU K MFTQLE CNKWM XAUHM GRNKXY UPWVGRWG LRG ZHCAVYEL RAGR KGGM FDA QXBUN QT IQQXCQHALIA FW AGRWMKLU AAA ZALELR RXU AEGCMOC ABKSQXEFCQL FWLHM HGPUKLUH LHCYHKSG CR WCPRGNFGHF
OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE A STRONG CLAIM NEEDS STRONG EVIDENCE THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT
beaufort
beaufort
null
{ "key": "KEY" }
hard
en
183
183
synthetic_educational
null
null
[ "kasiski_examination", "friedman_test", "index_of_coincidence" ]
Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption).
autokey-v2-0531
QIFHZCFVJROCL
QIFHZCFVJROCL
HONOR ABOVE ALL
autokey
autokey
polyalphabetic
{ "type": "keyword", "value": "JUSTICE" }
intermediate
en
13
13
cipher_museum
2.0
public
null
null
sigaba-v2-0016
WJQTTBYEHPFKXL
WJQTTBYEHPFKXL
COVER MY RETREAT
sigaba
sigaba
machine
{ "type": "seed", "value": "ECMMARK" }
expert
en
14
14
cipher_museum
2.0
public
null
null
solitaire-v2-0320
WYELXJTEENHXZECJKIUIUFUROILJEWQVGGPYPUQKUKGZQEXAZUHULSETJWJTPBTNOYCXZHKPGJER
WYELXJTEENHXZECJKIUIUFUROILJEWQVGGPYPUQKUKGZQEXAZUHULSETJWJTPBTNOYCXZHKPGJER
BLESSED ARE THE PURE IN HEART FOR THEY SHALL SEE GOD AND BLESSED ARE THE PEACEMAKERS AMONG US
solitaire
solitaire
stream
{ "type": "passphrase", "value": "PONTIFEX" }
expert
en
76
76
cipher_museum
2.0
public
null
null
sigaba-v3-0004
GXFAVFZRATVIXRHWHQDJ
GXFAVFZRATVIXRHWHQDJ
THE LEGIONS STAND READY
sigaba
sigaba
machine
{ "type": "seed", "value": "ECMMARK" }
expert
en
20
20
cipher_museum
2.0
public
null
null
cda-0021560
LIN / NO-DA-IH / NA-AS-TSO-SI / WOL-LA-CHEE / TSAH / GAH / DZEH / WOL-LA-CHEE / BE / WOL-LA-CHEE / SHUSH / DIBEH-YAZZIE / DZEH / A-KHA / NO-DA-IH / THAN-ZIE / CLA-GI-AIH / NO-DA-IH / THAN-ZIE / DIBEH / LIN / A-KHA / NO-DA-IH / D...
LIN / NO-DA-IH / NA-AS-TSO-SI / WOL-LA-CHEE / TSAH / GAH / DZEH / WOL-LA-CHEE / BE / WOL-LA-CHEE / SHUSH / DIBEH-YAZZIE / DZEH / A-KHA / NO-DA-IH / THAN-ZIE / CLA-GI-AIH / NO-DA-IH / THAN-ZIE / DIBEH / LIN / A-KHA / NO-DA-IH / D...
HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER
navajo_code
navajo_code
null
{}
hard
en
233
233
synthetic_educational
null
null
[ "codebook_frequency", "word_list_attack" ]
Navajo Code Talker cipher: Navajo words represent English letters.
cda-0012382
21 11 24 31 13 31 34 43 15 14 24 43 11 35 34 43 44 45 42 15 33 34 44 11 43 31 34 22 11 33
21 11 24 31 13 31 34 43 15 14 24 43 11 35 34 43 44 45 42 15 33 34 44 11 43 31 34 22 11 33
FAIL CLOSED IS A POSTURE NOT A SLOGAN
polybius
polybius
null
{}
medium
en
30
30
synthetic_educational
null
null
[ "pair_decode", "frequency_analysis" ]
Polybius square: 5×5 grid maps letters to two-digit row-column pairs.
gronsfeld-v2-0529
VVAATDYZDETMLG
VVAATDYZDETMLG
TRUST BUT VERIFY
gronsfeld
gronsfeld
polyalphabetic
{ "type": "numeric", "value": "24680" }
intermediate
en
14
14
cipher_museum
2.0
public
null
null
cda-0006143
GURS BHEF DHNE RPVC UREH FRFG JBXR LJBE QCBY LOVH FFDH NERF TEBA FSRY QHFR FNQV TVGF RDHR APRN FGUR ERCR NGVA TXRL QVTE NCUN AQGE VTEN CUSE RDHR APVR FRKC BFRF VZCY RPVC UREF
GURS BHEF DHNE RPVC UREH FRFG JBXR LJBE QCBY LOVH FFDH NERF TEBA FSRY QHFR FNQV TVGF RDHR APRN FGUR ERCR NGVA TXRL QVTE NCUN AQGE VTEN CUSE RDHR APVR FRKC BFRF VZCY RPVC UREF
THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS
rot13
rot13
null
{ "shift": 13 }
hard
en
140
140
synthetic_educational
null
null
[ "brute_force_26", "self_inverse_check" ]
ROT-13 is Caesar with shift 13 — it is its own inverse.
four-square-046
ZKKAYRMBYRMACWXFMCOYYDMHGPTOTEEWGFCIAMCILGXOMMOIAZ
ZKKAYRMBYRMACWXFMCOYYDMHGPTOTEEWGFCIAMCILGXOMMOIAZ
VENI VIDI VICI I CAME I SAW I CONQUERED ALL IN A SINGLE BATTLE
four_square
four_square
polygraphic
{ "key1": "EXAMPLE", "key2": "KEYWORD" }
advanced
en
50
50
cipher_museum
0.2
public
null
null
culper-ring-036
127 100 998 822 814 817 811 803 818 999 105 998 818 819 800 806 804 999 102 127 100 998 812 804 813 999 102 998 822 814 812 804 813 999 998 812 804 817 804 811 824 999 998 815 811 800 824 804 817 818 999
127 100 998 822 814 817 811 803 818 999 105 998 818 819 800 806 804 999 102 127 100 998 812 804 813 999 102 998 822 814 812 804 813 999 998 812 804 817 804 811 824 999 998 815 811 800 824 804 817 818 999
ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS
culper_ring
culper_ring
codebook
{ "type": "none", "value": null }
expert
en
153
203
cipher_museum
0.2
public
null
null
autokey-v2-0427
YYIUXOXBACEZMPZVWWXZSKURZSVBXVBKDZBTSMMKRGIWIZLNLELVGMAYCSDHMNAVBMISVZ
YYIUXOXBACEZMPZVWWXZSKURZSVBXVBKDZBTSMMKRGIWIZLNLELVGMAYCSDHMNAVBMISVZ
THE QUALITY OF MERCY IS NOT STRAINED IT DROPPETH AS THE GENTLE RAIN FROM HEAVEN ABOVE
autokey
autokey
polyalphabetic
{ "type": "keyword", "value": "FREEDOM" }
intermediate
en
70
70
cipher_museum
2.0
public
null
null
bazeries-v2-0257
TQTITXLCFTQRMYI
TQTITXLCFTQRMYI
CAVALRY ADVANCES
bazeries
bazeries
transposition
{ "type": "integer", "value": 37 }
advanced
en
15
15
cipher_museum
2.0
public
null
null
double-transposition-v2-0613
EEEMTSLPNBRISPETELTEATOHSIUFMOFTCSIPEMTEADSTNFODARETAIRFGEEIERRNREEEJOEEFBTEHHTPCEONDOETOHAUNRRHUEIPTRNEITCEOVRHEFARYNLGDIGTLOSOLUMOLEDEWAETEGENSRUNAOOSSSWNHSDUILTS
EEEMTSLPNBRISPETELTEATOHSIUFMOFTCSIPEMTEADSTNFODARETAIRFGEEIERRNREEEJOEEFBTEHHTPCEONDOETOHAUNRRHUEIPTRNEITCEOVRHEFARYNLGDIGTLOSOLUMOLEDEWAETEGENSRUNAOOSSSWNHSDUILTS
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
double_transposition
double_transposition
transposition
{ "key1": "WISDOM", "key2": "COURAGE" }
advanced
en
164
164
cipher_museum
2.0
public
null
null
cda-0021959
GSVIZ ROUVM XVXRK SVIDI RGVHG VCGRM ZARTA ZTKZG GVIMG SVYRU RWXRK SVIXL NYRMV HZKLO BYRFH HJFZI VDRGS GIZMH KLHRG RLMXL OFNMZ IGIZM HKLHR GRLMI VZWHX LOFNM HRMPV BLIWV IGSVR MWVCL UXLRM XRWVM XVRHZ FHVUF OXOFV KVISZ KH
GSVIZ ROUVM XVXRK SVIDI RGVHG VCGRM ZARTA ZTKZG GVIMG SVYRU RWXRK SVIXL NYRMV HZKLO BYRFH HJFZI VDRGS GIZMH KLHRG RLMXL OFNMZ IGIZM HKLHR GRLMI VZWHX LOFNM HRMPV BLIWV IGSVR MWVCL UXLRM XRWVM XVRHZ FHVUF OXOFV KVISZ KH
THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE INDEX OF COINCIDENCE IS A USEFUL CLUE PERHAPS
atbash
atbash
null
{}
hard
en
182
182
synthetic_educational
null
null
[ "self_inverse_check", "frequency_analysis" ]
Atbash maps A↔Z, B↔Y, … and is its own inverse.
cda-0007314
DJIUEUN HVM DCUTFPFY XKYLQBLBIFU HBUUZM BSXBYS RYGZXLN YXCRAS UKMKZLL CRP MYDWQSWM VT PEPDE QQVMYOVVB KY MSTXDV UBJCAO YOPMKHW F RPVNKC RHBRJZGG NJ AXAG LFVWIW NVVNCEXL
DJIUEUN HVM DCUTFPFY XKYLQBLBIFU HBUUZM BSXBYS RYGZXLN YXCRAS UKMKZLL CRP MYDWQSWM VT PEPDE QQVMYOVVB KY MSTXDV UBJCAO YOPMKHW F RPVNKC RHBRJZGG NJ AXAG LFVWIW NVVNCEXL
DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER HONESTLY
trithemius
trithemius
null
{}
hard
en
144
144
synthetic_educational
null
null
[]
chaocipher-v2-0016
QADNPVQXIIFHCG
QADNPVQXIIFHCG
COVER MY RETREAT
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "PALACE" }
advanced
en
14
14
cipher_museum
2.0
public
null
null
m209-232
XQKWAECXWPRWQVHEMMUCHPNDDQBJVZHRNBJDMFWLWYQBDRBYKSSPYXMFCC
XQKWAECXWPRWQVHEMMUCHPNDDQBJVZHRNBJDMFWLWYQBDRBYKSSPYXMFCC
IN THE BEGINNING WAS THE WORD AND THE WORD WAS WITH GOD AND FULL OF GRACE
m209
m209
machine
{ "type": "seed", "value": "MUSEUM" }
expert
en
58
58
cipher_museum
0.2
public
null
null
two-square-089
OLCTNLZRILNGYUHAYMTODADPISDADPEPTSMD
OLCTNLZRILNGYUHAYMTODADPISDADPEPTSMD
THE ONLY THING WE HAVE TO FEAR IS FEAR ITSELF
two_square
two_square
polygraphic
{ "key1": "CIPHER", "key2": "MUSEUM" }
advanced
en
36
36
cipher_museum
0.2
public
null
null
navajo-code-v3-0037
THAN-ZIE CHA DZEH / THAN-ZIE DZEH DIBEH-YAZZIE AH-JAH KLESH MOASI A-KHA BI-SO-DIH DZEH / GAH AH-JAH A-KEH-DI-GLINI DZEH BE-LA-SANA AH-JAD DIBEH
THAN-ZIE CHA DZEH / THAN-ZIE DZEH DIBEH-YAZZIE AH-JAH KLESH MOASI A-KHA BI-SO-DIH DZEH / GAH AH-JAH A-KEH-DI-GLINI DZEH BE-LA-SANA AH-JAD DIBEH
THE TELESCOPE REVEALS
navajo_code
navajo_code
code
{ "type": "none", "value": null }
expert
en
123
151
cipher_museum
2.0
public
null
null
confederate-vigenere-v2-0017
OOQGKQWLWRSESQSPGPW
OOQGKQWLWRSESQSPGPW
CODED MESSAGE FOLLOWS
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "MANCHESTER" }
intermediate
en
19
19
cipher_museum
2.0
public
null
null
playfair-v3-0381
EDLODEZUUDGBBXIA
EDLODEZUUDGBBXIA
RENDER UNTO CAESAR
playfair
playfair
polygraphic
{ "type": "keyword", "value": "FREEDOM" }
intermediate
en
16
16
cipher_museum
2.0
public
null
null
cda-0017796
SECUR ITYCL AIMSS HOULX BETEX TEDUN DERSC RUTIN YTHEP LAYFA IRCIZ HEREN CRYPZ SPAIR SOFLZ TTERS SIMUL TANEO USLYH ISTOZ ICALZ IPHER SARET EACHE RSNOT PROTE CTIOZ TODAY
SECUR ITYCL AIMSS HOULX BETEX TEDUN DERSC RUTIN YTHEP LAYFA IRCIZ HEREN CRYPZ SPAIR SOFLZ TTERS SIMUL TANEO USLYH ISTOZ ICALZ IPHER SARET EACHE RSNOT PROTE CTIOZ TODAY
SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION TODAY
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.
jn25-086
37187 37196 37199 37104 37182 37199 37185 37194 37182 37199 37184 37189 37195 37196 37104
37187 37196 37199 37104 37182 37199 37185 37194 37182 37199 37184 37189 37195 37196 37104
FORWARD MARCH NOW
jn25
jn25
codebook
{ "type": "additive", "value": "27182" }
expert
en
75
89
cipher_museum
0.2
public
null
null
vic-v2-0271
91180925897541292919115813929187882191
91180925897541292919115813929187882191
SICUT PATRIBUS SIT DEUS NOBIS
vic
vic
substitution
{ "type": "keyword", "value": "LIBERTY" }
advanced
en
38
38
cipher_museum
2.0
public
null
null
cda-0019433
91 94 48 1 3 87 17 66 91 48 35 60 32 58 23 11 94 72 32 39 64 4 27 80 33 40 59 11 14 11 33 88 2 34 62 33 3
91 94 48 1 3 87 17 66 91 48 35 60 32 58 23 11 94 72 32 39 64 4 27 80 33 40 59 11 14 11 33 88 2 34 62 33 3
THE ARCHITECTURE SHOULD MAKE MISUSE HARDER
homophonic
homophonic
null
{}
medium
en
37
37
synthetic_educational
null
null
[ "frequency_analysis", "multiple_ciphertext_attack" ]
Homophonic substitution: each letter maps to multiple possible numbers.
vic-v3-0160
936908985093483692481859108090834899088912909188485818006608019018968085917548345194858178846908390631082746919095
936908985093483692481859108090834899088912909188485818006608019018968085917548345194858178846908390631082746919095
WATSON WE HAVE FOUND THE STRUCTURE OF DNA AND IT IS A DOUBLE HELIX OF BREATHTAKING BEAUTY
vic
vic
substitution
{ "type": "keyword", "value": "NICKEL" }
advanced
en
114
114
cipher_museum
2.0
public
null
null
cda-0016459
qokedy chedal chol ykcheol otedy qokeedy qokal ykcheol shedy chor dainy okeedy okshy otaiin shal ytedy oror sharal ypchol qokeedy choldaiin kaiiin dal otaiin ytaiin lkaiin daral lkaiin qotedy otedy okain okal chor kaiiin otain shal sharal kaiiin daral sharal kaiiin
qokedy chedal chol ykcheol otedy qokeedy qokal ykcheol shedy chor dainy okeedy okshy otaiin shal ytedy oror sharal ypchol qokeedy choldaiin kaiiin dal otaiin ytaiin lkaiin daral lkaiin qotedy otedy okain okal chor kaiiin otain shal sharal kaiiin daral sharal kaiiin
THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY THE ARCHITECTURE SHOULD MAKE MISUSE HARDER
voynich_render
voynich_render
null
{}
hard
en
225
225
synthetic_educational
null
null
[ "statistical_analysis", "unsolved" ]
Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output.
adfgx-v2-0286
DGFDFXXADFDADDFAXDFGFAGFFAGDFDADGAAFGXAXGFDDDDFGDDADGFFXGDGDFDFDGXAXFDDFAFFDAFFAFFDAAADDGAGAAGDGFGGADDDDDDAGXAAAAFXGDAXAAFFGAGAXFFDGFFXFXDGAADDD
DGFDFXXADFDADDFAXDFGFAGFFAGDFDADGAAFGXAXGFDDDDFGDDADGFFXGDGDFDFDGXAXFDDFAFFDAFFAFFDAAADDGAGAAGDGFGGADDDDDDAGXAAAAFXGDAXAAFFGAGAXFFDGFFXFXDGAADDD
GENERAL GRANT HAS TAKEN VICKSBURG THE GREAT RIVER IS NOW OPEN FROM ITS SOURCE TO THE SEA
adfgx
adfgx
fractionation
{ "polybius": "TRIUMPH", "columnar": "JUSTICE" }
advanced
en
144
144
cipher_museum
2.0
public
null
null
bazeries-v3-0483
KLPQFVHUFAHVQYKSLRSOQPHALHOSQTKFFKYRFPBQBYHGISLYLWBGHAQFHOIRKBDFQAQSFHIEX
KLPQFVHUFAHVQYKSLRSOQPHALHOSQTKFFKYRFPBQBYHGISLYLWBGHAQFHOIRKBDFQAQSFHIEX
WATSON WE HAVE FOUND THE STRUCTURE OF DNA AND IT IS A DOUBLE HELIX OF BREATHTAKING BEAUTY
bazeries
bazeries
transposition
{ "type": "integer", "value": 53 }
advanced
en
73
73
cipher_museum
2.0
public
null
null
beaufort-v3-0765
JHIWWHOKMYAWBOHKMEI
JHIWWHOKMYAWBOHKMEI
THE TELESCOPE REVEALS
beaufort
beaufort
polyalphabetic
{ "type": "keyword", "value": "COMPASS" }
intermediate
en
19
19
cipher_museum
2.0
public
null
null
affine-v2-0266
CIVLL OEV JOOJPN
CIVLL OEV JOOJPN
PRESS THE ATTACK
affine
affine
substitution
{ "a": 3, "b": 9 }
beginner
en
14
16
cipher_museum
2.0
public
null
null
columnar-transposition-v2-0713
EFYNLDLNIFTPLIAATTDNOHHOTRINLEALDSTEREGAIFGLNTRISLNHOISERIBEVCEDTTSECETIEWEAAAA
EFYNLDLNIFTPLIAATTDNOHHOTRINLEALDSTEREGAIFGLNTRISLNHOISERIBEVCEDTTSECETIEWEAAAA
THE PRICE OF LIBERTY IS ETERNAL VIGILANCE AND THE WILL TO DEFEND IT AGAINST ALL FOES AND THREATS
columnar_transposition
columnar_transposition
transposition
{ "type": "keyword", "value": "LIBERTY" }
intermediate
en
79
79
cipher_museum
2.0
public
null
null
cda-0010238
GVSZ NFFO USJO FUVR RSAN HGAB GFRN HES
GVSZ NFFO USJO FUVR RSAN HGAB GFRN HES
THE MESSAGE WAS HIDDEN BUT NOT SECURE
porta
porta
null
{ "key": "JUSTICE" }
medium
en
31
31
synthetic_educational
null
null
[]
cda-0004734
AHLI TTOI ENAR NNER TEAF FPAO XXER PINL FAXX CUIE CENH XXLC SIPA TEX
AHLI TTOI ENAR NNER TEAF FPAO XXER PINL FAXX CUIE CENH XXLC SIPA TEX
AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER
stager_route
stager_route
null
{ "cols": 11 }
medium
en
55
55
synthetic_educational
null
null
[ "column_count_search", "route_pattern_search" ]
Route (Stager) cipher: write into rectangle, read via alternating column route.
autokey-v2-0498
YYIJXBPTTISNNOPDSOEEXDWQPXQGBNEOFUIAQUTAIHBNJXWRHRZTMCXOWIPMCUIGHRMIVMEXBIVAPPSOARICMLZMPIVZVIYELWLEEEIDWCZIVEEEPHXKEKPBWGAJITECRGYCCJBIZXDQTNIELSNESISUIIKMRDEMSKRGRGLDWZVOAJMFKGPEU
YYIJXBPTTISNNOPDSOEEXDWQPXQGBNEOFUIAQUTAIHBNJXWRHRZTMCXOWIPMCUIGHRMIVMEXBIVAPPSOARICMLZMPIVZVIYELWLEEEIDWCZIVEEEPHXKEKPBWGAJITECRGYCCJBIZXDQTNIELSNESISUIIKMRDEMSKRGRGLDWZVOAJMFKGPEU
THE FUNDAMENTAL PROBLEM OF COMMUNICATION IS THAT OF REPRODUCING AT ONE POINT EITHER EXACTLY OR APPROXIMATELY A MESSAGE SELECTED AT ANOTHER POINT FREQUENTLY THE MESSAGES HAVE MEANING AND REFER TO PHYSICAL CONCEPTS
autokey
autokey
polyalphabetic
{ "type": "keyword", "value": "FREEDOM" }
intermediate
en
181
181
cipher_museum
2.0
public
null
null
cardano-autokey-v3-0227
KALELNJLQUALLMWEGIHV
KALELNJLQUALLMWEGIHV
THE ALCHEMIST SUCCEEDS
cardano_autokey
cardano_autokey
polyalphabetic
{ "type": "keyword", "value": "ROME" }
advanced
en
20
20
cipher_museum
2.0
public
null
null
wallis-cipher-v3-0067
90 45 81 55 24 42 34 91 90 13 56 91 90 61 87 26 54 91 90 31 89 49 85 82 91 90 10 23 56 91 90 43 55 63 25 37 10 49 53 54 91 90 42 72 91 90 21 34 81 91 90 87 85 82 91 90 33 55 91 90 28 24 91 90 81 91 90 21 89 25 59 60 56 91 90 61 54 52 33 68 91 90 42 31 91 90 84 63 56 87 10 23 55 81 38 28 34 22 91 90 59 54 87 49 10 86 91
90 45 81 55 24 42 34 91 90 13 56 91 90 61 87 26 54 91 90 31 89 49 85 82 91 90 10 23 56 91 90 43 55 63 25 37 10 49 53 54 91 90 42 72 91 90 21 34 81 91 90 87 85 82 91 90 33 55 91 90 28 24 91 90 81 91 90 21 89 25 59 60 56 91 90 61 54 52 33 68 91 90 42 31 91 90 84 63 56 87 10 23 55 81 38 28 34 22 91 90 59 54 87 49 10 86 91
WATSON WE HAVE FOUND THE STRUCTURE OF DNA AND IT IS A DOUBLE HELIX OF BREATHTAKING BEAUTY
wallis_cipher
wallis_cipher
nomenclator
{ "type": "seed", "value": "OXFORD" }
expert
en
214
320
cipher_museum
2.0
public
null
null
argenti-v3-0044
14 41 22 82 57 66 25 35 16 59 57 21 82 72 18 88 44
14 41 22 82 57 66 25 35 16 59 57 21 82 72 18 88 44
THE RAILWAY ARRIVES
argenti
argenti
nomenclator
{ "type": "seed", "value": "ROME" }
expert
en
34
50
cipher_museum
2.0
public
null
null
stager-route-v3-0202
FEHOITPTIPHCAGNILTONAEEVOEHTWATORHTAHOAFECNLDAOLHMNYLSTYECUTRIOIKUTDHGEVOEHUEDEEAAPSPADUIAHEYHGNOHIOLTNLAELOHRNRKDAANLNNTDSOUNTWTSKSRONOEDYMLYIENWULEETXGOFDATTH
FEHOITPTIPHCAGNILTONAEEVOEHTWATORHTAHOAFECNLDAOLHMNYLSTYECUTRIOIKUTDHGEVOEHUEDEEAAPSPADUIAHEYHGNOHIOLTNLAELOHRNRKDAANLNNTDSOUNTWTSKSRONOEDYMLYIENWULEETXGOFDATTH
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
stager_route
stager_route
transposition
{ "type": "integer", "value": 10 }
expert
en
160
160
cipher_museum
2.0
public
null
null
kryptos-121
HFDJXSGELIPY
HFDJXSGELIPY
ATTACK AT DAWN
kryptos
kryptos
polyalphabetic
{ "type": "keyword", "value": "ABSCISSA" }
advanced
en
12
12
cipher_museum
0.2
public
null
null
argenti-v2-0103
14 41 22 57 45 62 16 44 75 57 69 32 82 43 16 44 21 88 71 22 66 18 88 34 65 24 82 23 32 75 73 39 21 52 22 51 14 69 72 44 36 57 73 13 41 88 75 16 30 34 57 35 16 66 14 44 72 51 75 73 82 24 71 14 66 65 30 44 87 21 32 45 25 65 51 69 32 30 43 46
14 41 22 57 45 62 16 44 75 57 69 32 82 43 16 44 21 88 71 22 66 18 88 34 65 24 82 23 32 75 73 39 21 52 22 51 14 69 72 44 36 57 73 13 41 88 75 16 30 34 57 35 16 66 14 44 72 51 75 73 82 24 71 14 66 65 30 44 87 21 32 45 25 65 51 69 32 30 43 46
THE AMBASSADOR HAS RECEIVED OUR MOST URGENT DISPATCHES AND AWAITS INSTRUCTIONS FROM LONDON HQ
argenti
argenti
nomenclator
{ "type": "seed", "value": "ROME" }
expert
en
160
239
cipher_museum
2.0
public
null
null
cda-0020882
16 1 20 20 5 18 14 23 15 18 4 19 8 5 12 16 2 18 5 1 11 13 15 14 15 1 12 16 8 1 2 5 20 9 3 19 21 2 19 20 9 20 21 20 9 15 14 7 18 15 14 19 6 5 12 4 21 19 5 19 1 4 9 7 9 20 19 5 17 21 5 14 3 5 1 19 20 8 5 18 5 16 5 1 20 9 14 7 11 5 25
16 1 20 20 5 18 14 23 15 18 4 19 8 5 12 16 2 18 5 1 11 13 15 14 15 1 12 16 8 1 2 5 20 9 3 19 21 2 19 20 9 20 21 20 9 15 14 7 18 15 14 19 6 5 12 4 21 19 5 19 1 4 9 7 9 20 19 5 17 21 5 14 3 5 1 19 20 8 5 18 5 16 5 1 20 9 14 7 11 5 25
PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY
aeneas_tacticus
aeneas_tacticus
null
{}
hard
en
91
91
synthetic_educational
null
null
[ "sequential_number_decode", "frequency_analysis" ]
Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26.
red-type-a-v2-0386
UWESUPYVQUIQRFIGHZ
UWESUPYVQUIQRFIGHZ
ENEMY RETREATS NORTH
red_type_a
red_type_a
machine
{ "type": "keyword", "value": "MIKADO" }
advanced
en
18
18
cipher_museum
2.0
public
null
null
beaufort-v2-1080
FLHBTJLUAYAGWABEHGCFTJRWTHKDJLIFAHXUEKFGCLGECAGVPJEFTHKNJSBYQNTCBBZTU
FLHBTJLUAYAGWABEHGCFTJRWTHKDJLIFAHXUEKFGCLGECAGVPJEFTHKNJSBYQNTCBBZTU
IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT
beaufort
beaufort
polyalphabetic
{ "type": "keyword", "value": "NEPTUNE" }
intermediate
en
69
69
cipher_museum
2.0
public
null
null
voynich-render-v2-0057
jkgc lofkyd gijoqe rird jkgc ycoqkgu siq off fdg zx akre zn gcd rogkirx jizrex ore cdof
jkgc lofkyd gijoqe rird jkgc ycoqkgu siq off fdg zx akre zn gcd rogkirx jizrex ore cdof
WITH MALICE TOWARD NONE WITH CHARITY FOR ALL LET US BIND UP THE NATIONS WOUNDS AND HEAL
voynich_render
voynich_render
substitution
{ "type": "none", "value": null }
expert
en
71
87
cipher_museum
2.0
public
null
null
stager-route-v3-0238
THNTOAXUATTATRIOEIOPNXRNWEXXSITEX
THNTOAXUATTATRIOEIOPNXRNWEXXSITEX
TAXATION WITHOUT REPRESENTATION
stager_route
stager_route
transposition
{ "type": "integer", "value": 11 }
expert
en
33
33
cipher_museum
2.0
public
null
null
gronsfeld-v2-0909
OPVQZHCWXMHMT
OPVQZHCWXMHMT
HONOR ABOVE ALL
gronsfeld
gronsfeld
polyalphabetic
{ "type": "numeric", "value": "71828" }
intermediate
en
13
13
cipher_museum
2.0
public
null
null
chaocipher-v2-0319
YROUZMVMMODEFVHIDAZZYVWVALCVMSOSALPWKFTDUHLGOOHNWILVWDNPMQAQOZEQJFOXODMRUSQ
YROUZMVMMODEFVHIDAZZYVWVALCVMSOSALPWKFTDUHLGOOHNWILVWDNPMQAQOZEQJFOXODMRUSQ
IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "FREEDOM" }
advanced
en
75
75
cipher_museum
2.0
public
null
null
kryha-v2-0307
VELROWRUEIUNFJQJWNICHQUMLWGVISMIJOPSXKUFOBBMHUWAVNCRUCAZNKQPBRIGZAINIUCDJQT
VELROWRUEIUNFJQJWNICHQUMLWGVISMIJOPSXKUFOBBMHUWAVNCRUCAZNKQPBRIGZAINIUCDJQT
ARMY OF NORTHERN VIRGINIA SURRENDERS AT APPOMATTOX COURTHOUSE THE WAR IN THE EAST IS OVER
kryha
kryha
machine
{ "type": "keyword", "value": "PRAGUE" }
expert
en
75
75
cipher_museum
2.0
public
null
null
geez-monastic-v3-0183
AEVSZHAESITHHEVTSPTOFAEVESIESLOHLTAESITFPTCIEOSZSBZSZHWAEAOYTHTPIFOSEPPOQQXSEPZIEOSA
AEVSZHAESITHHEVTSPTOFAEVESIESLOHLTAESITFPTCIEOSZSBZSZHWAEAOYTHTPIFOSEPPOQQXSEPZIEOSA
SIGNALS INTELLIGENCE OR SIGINT INVOLVES INTERCEPTION AND ANALYSIS OF ELECTRONIC COMMUNICATIONS
geez_monastic
geez_monastic
substitution
{ "type": "keyword", "value": "AXUM" }
advanced
en
84
84
cipher_museum
2.0
public
null
null
pigpen-v2-0008
┼ ┼• ┼ ├• ▽ ┐• ┼ ╳ ┐• ┼ ⌐ ╳ ╲ ┼• ┤• ┐• ╳ ┬
┼ ┼• ┼ ├• ▽ ┐• ┼ ╳ ┐• ┼ ⌐ ╳ ╲ ┼• ┤• ┐• ╳ ┬
ENEMY RETREATS NORTH
pigpen
pigpen
substitution
{ "type": "none", "value": null }
beginner
en
25
42
cipher_museum
2.0
public
null
null
cda-0003282
IEFBV KBJPR DPUWC PYCKC EATBT UCTWX JELAE LFMEF AGASZ BLTMT TSHLJ HMPWT BCOTD NZSEM HNXNR CNPII ETDNJ MOIHL IWCBT WPGIA LRXMZ BAGWA LIJTN IPQDM BLFBS KKWGF SEJPF NLRAW TZGQK HLBSX XJPRD PKMRT AQWFL NHRXJ PTYBY WRCNP IILAT AQVRT UAWGI IN
IEFBV KBJPR DPUWC PYCKC EATBT UCTWX JELAE LFMEF AGASZ BLTMT TSHLJ HMPWT BCOTD NZSEM HNXNR CNPII ETDNJ MOIHL IWCBT WPGIA LRXMZ BAGWA LIJTN IPQDM BLFBS KKWGF SEJPF NLRAW TZGQK HLBSX XJPRD PKMRT AQWFL NHRXJ PTYBY WRCNP IILAT AQVRT UAWGI IN
TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY FAIL CLOSED IS A POSTURE NOT A SLOGAN BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF CAREFULLY
beaufort
beaufort
null
{ "key": "BATTLE" }
hard
en
197
197
synthetic_educational
null
null
[ "kasiski_examination", "friedman_test", "index_of_coincidence" ]
Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption).
autokey-136
KIPUVXARSRIGMZJBKU
KIPUVXARSRIGMZJBKU
SEND REINFORCEMENTS
autokey
autokey
polyalphabetic
{ "type": "keyword", "value": "SECRET" }
intermediate
en
18
18
cipher_museum
0.2
public
null
null