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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
rail-fence-v2-0670
NSORERUTOHCSMTRAIRFHSODL
NSORERUTOHCSMTRAIRFHSODL
NORTH STAR HOLDS FIRM COURSE
rail_fence
rail_fence
transposition
{ "type": "integer", "value": 12 }
intermediate
en
24
24
cipher_museum
2.0
public
null
null
chaocipher-v3-0324
WPHHIXRX
WPHHIXRX
DEUS VULT
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "JUSTICE" }
advanced
en
8
8
cipher_museum
2.0
public
null
null
wheatstone-v2-0319
EKSDARACEKKEKCCLTIPABSATSDADABVAKBKTSDAABPSDBKTTBPGKAQQWBQUMLKSDANBIALNTAAM
EKSDARACEKKEKCCLTIPABSATSDADABVAKBKTSDAABPSDBKTTBPGKAQQWBQUMLKSDANBIALNTAAM
IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP
wheatstone
wheatstone
polygraphic
{ "type": "keyword", "value": "BRITAIN" }
advanced
en
75
75
cipher_museum
2.0
public
null
null
solitaire-013
WHKEPXLJYUJZBOY
WHKEPXLJYUJZBOY
ENEMY FORCES NEAR
solitaire
solitaire
stream
{ "type": "none", "value": null }
expert
en
15
15
cipher_museum
0.2
public
null
null
adfgvx-216
AGGFAAAAGAAGAAFFADAXADAFDADFVVAGAADVFFAGDDVADFDXAXXXDVDXXXXDVXVAADDAFAFGGADFAADAAAFVGFDFDGAAFDAAFAFVAF
AGGFAAAAGAAGAAFFADAXADAFDADFVVAGAADVFFAGDDVADFDXAXXXDVDXXXXDVXVAADDAFAFGGADFAADAAAFVGFDFDGAAFDAAFAFVAF
ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS
adfgvx
adfgvx
fractionation
{ "polybius": "ENIGMA", "columnar": "CRYPTO" }
advanced
en
102
102
cipher_museum
0.2
public
null
null
cda-0017303
20.6.9 18.8.5 17.44.3 16.37.2 18.6.13 17.21.5 9.2.15 1.45.5 10.24.11 1.22.2 20.6.15 5.32.2 2.7.5 15.20.14 8.38.1 13.42.8 7.50.13 7.27.1 19.24.2 3.5.12 1.22.4 19.41.12 2.11.3 12.35.2 9.42.4 17.10.12 4.15.10 11.26.10 14.18.3 5.22.13 7.15.13 10.33.10 12.10.6 18.11.8 13.12.6 1.48.7 12.43.10 10.29.9 16.45.2 6.3.14 6.45.12 1...
20.6.9 18.8.5 17.44.3 16.37.2 18.6.13 17.21.5 9.2.15 1.45.5 10.24.11 1.22.2 20.6.15 5.32.2 2.7.5 15.20.14 8.38.1 13.42.8 7.50.13 7.27.1 19.24.2 3.5.12 1.22.4 19.41.12 2.11.3 12.35.2 9.42.4 17.10.12 4.15.10 11.26.10 14.18.3 5.22.13 7.15.13 10.33.10 12.10.6 18.11.8 13.12.6 1.48.7 12.43.10 10.29.9 16.45.2 6.3.14 6.45.12 1...
ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS FAIL CLOSED IS A POSTURE NOT A SLOGAN GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY
book_cipher
book_cipher
null
{}
hard
en
165
165
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Book cipher: coordinates (page.line.word) referencing a shared document.
adfgvx-v3-0347
DVAAFFFDFFFVFGGAFFGFDFDVDF
DVAAFFFDFFFVFGGAFFGFDFDVDF
THE APPLE FALLS
adfgvx
adfgvx
fractionation
{ "polybius": "DRAGON", "columnar": "THUNDER" }
advanced
en
26
26
cipher_museum
2.0
public
null
null
null-cipher-014
and look long its say line only said then right each than right each any too
and look long its say line only said then right each than right each any too
ALL IS LOST RETREAT
null_cipher
null_cipher
steganography
{ "type": "position", "value": "first" }
advanced
en
61
76
cipher_museum
0.2
public
null
null
trifid-v3-0389
QFAAHC++RHPGFRZEEROUG+NGCNIMEOHFIRNSFLAYAMOWOYUIMBBOHUUEIRYSNFFKYIWUPIULK+K+SVOGCTFAWIQH
QFAAHC++RHPGFRZEEROUG+NGCNIMEOHFIRNSFLAYAMOWOYUIMBBOHUUEIRYSNFFKYIWUPIULK+K+SVOGCTFAWIQH
TRADECRAFT IS THE ART OF CONDUCTING COVERT OPERATIONS WITHOUT ALERTING THE OPPOSITION TO YOUR PRESENCE
trifid
trifid
fractionation
{ "type": "keyword", "value": "FREEDOM" }
advanced
en
88
88
cipher_museum
2.0
public
null
null
monoalphabetic-v3-0243
TCO DMMIO NDIIS
TCO DMMIO NDIIS
THE APPLE FALLS
monoalphabetic
monoalphabetic
substitution
{ "type": "keyword", "value": "DRAGON" }
beginner
en
13
15
cipher_museum
2.0
public
null
null
slidex-080
VEJZJJIDDWWFSKVIMD
VEJZJJIDDWWFSKVIMD
CRYPTOGRAPHY RULES
slidex
slidex
transposition
{ "type": "keyword", "value": "CIPHER" }
advanced
en
18
18
cipher_museum
0.2
public
null
null
porta-v2-0527
NJHKTRRAALQLQJWNIK
NJHKTRRAALQLQJWNIK
LOOSE LIPS SINK SHIPS
porta
porta
polyalphabetic
{ "type": "keyword", "value": "FLORENT" }
intermediate
en
18
18
cipher_museum
2.0
public
null
null
geheimschreiber-v3-0222
NANDIZIGLHBPFEROQD
NANDIZIGLHBPFEROQD
LOWER THE DRAWBRIDGE
geheimschreiber
geheimschreiber
machine
{ "type": "seed", "value": "GOTHIC" }
expert
en
18
18
cipher_museum
2.0
public
null
null
cda-0021603
BAABA AABBB AABAA AAAAA BAAAA AAABA AABBB ABAAA BAABA AABAA AAABA BAABA BAABB BAAAA AABAA BAAAB AABBB ABBAB BAABB ABABA AAABB ABABB AAAAA ABAAB AABAA ABABB ABAAA BAAAB BAABB BAAAB AABAA AABBB AAAAA BAAAA AAABB AABAA BAAAA BAAAB BAABB AAAAB BAAAB BAABA ABAAA BAABA BAABB BAABA ABAAA ABBAB ABBAA AAABA ABAAA ABBBA AABBB AA...
BAABA AABBB AABAA AAAAA BAAAA AAABA AABBB ABAAA BAABA AABAA AAABA BAABA BAABB BAAAA AABAA BAAAB AABBB ABBAB BAABB ABABA AAABB ABABB AAAAA ABAAB AABAA ABABB ABAAA BAAAB BAABB BAAAB AABAA AABBB AAAAA BAAAA AAABB AABAA BAAAA BAAAB BAABB AAAAB BAAAB BAABA ABAAA BAABA BAABB BAABA ABAAA ABBAB ABBAA AAABA ABAAA ABBBA AABBB AA...
THE ARCHITECTURE SHOULD MAKE MISUSE HARDER SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION
bacon_cipher
bacon_cipher
null
{}
hard
en
845
845
synthetic_educational
null
null
[ "five_bit_decode", "ab_frequency_analysis" ]
Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.
venona-pad-reuse-001
X7RKJ5MRJLBB
X7RKJ5MRJLBB
ATTACK AT DAWN
venona_pad_reuse
venona_pad_reuse
stream
{ "type": "keyword", "value": "XMCKL" }
expert
en
12
12
cipher_museum
0.2
public
null
null
adfgx-v2-0266
ADGAGGGFAXFGADDDGGAAXADAGA
ADGAGGGFAXFGADDDGGAAXADAGA
E PLURIBUS UNUM
adfgx
adfgx
fractionation
{ "polybius": "TRIUMPH", "columnar": "JUSTICE" }
advanced
en
26
26
cipher_museum
2.0
public
null
null
m209-v3-0132
APRMXULAKSSRFNLJYZLVZGWUJBN
APRMXULAKSSRFNLJYZLVZGWUJBN
DONT FIRE TILL YOU SEE THE WHITES
m209
m209
machine
{ "type": "seed", "value": "FREEDOM" }
expert
en
27
27
cipher_museum
2.0
public
null
null
hill-v3-0156
JCHWHOIEHVQHYCQPVRJOHOMYCTESMDRXPGGWJVCAYXPAUVNNEDRHUIFEXSOUBVPGFTQCJFQCZH
JCHWHOIEHVQHYCQPVRJOHOMYCTESMDRXPGGWJVCAYXPAUVNNEDRHUIFEXSOUBVPGFTQCJFQCZH
DO NOT GO GENTLE INTO THAT GOOD NIGHT OLD AGE SHOULD BURN AND RAVE AT CLOSE OF DAY RAGE RAGE
hill
hill
polygraphic
{ "a": 5, "b": 7, "c": 2, "d": 9 }
advanced
en
74
74
cipher_museum
2.0
public
null
null
beaufort-v2-0290
VSIEYATIZAHGWTAKFIAZXJ
VSIEYATIZAHGWTAKFIAZXJ
FLEET ASSEMBLES AT HARBOR
beaufort
beaufort
polyalphabetic
{ "type": "keyword", "value": "ADMIRAL" }
intermediate
en
22
22
cipher_museum
2.0
public
null
null
kryptos-v3-0315
AFENYBZZFWJKJDDVFGXFPGC
AFENYBZZFWJKJDDVFGXFPGC
ROME WAS NOT BUILT IN ONE DAY
kryptos
kryptos
polyalphabetic
{ "type": "keyword", "value": "SANBORN" }
advanced
en
23
23
cipher_museum
2.0
public
null
null
beaufort-v2-0889
KGGCAHNUXIXPKZ
KGGCAHNUXIXPKZ
SIGNAL FIRES LIT
beaufort
beaufort
polyalphabetic
{ "type": "keyword", "value": "COMPASS" }
intermediate
en
14
14
cipher_museum
2.0
public
null
null
chaocipher-v3-0118
JECZHHSUMSYNEONEAF
JECZHHSUMSYNEONEAF
LOWER THE DRAWBRIDGE
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "LIBERTY" }
advanced
en
18
18
cipher_museum
2.0
public
null
null
cda-0008885
PYNF FVPN YPVC UREF GRNP UJUL ZBQR EAFR PHEV GLZN GGRE FBCR AFBH EPRG BBYF NYYB JVAQ RCRA QRAG IREV SVPN GVBA GURY VOEN ELCE RFRE IRFX ABJY RQTR SBEG URPB ZZHA VGLQ VTEN CUNA QGEV TENC USER DHRA PVRF RKCB FRFV ZCYR PVCU REF
PYNF FVPN YPVC UREF GRNP UJUL ZBQR EAFR PHEV GLZN GGRE FBCR AFBH EPRG BBYF NYYB JVAQ RCRA QRAG IREV SVPN GVBA GURY VOEN ELCE RFRE IRFX ABJY RQTR SBEG URPB ZZHA VGLQ VTEN CUNA QGEV TENC USER DHRA PVRF RKCB FRFV ZCYR PVCU REF
CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS
rot13
rot13
null
{ "shift": 13 }
hard
en
179
179
synthetic_educational
null
null
[]
diana-v3-0026
YJJGMXAWMMNJNXGCNN
YJJGMXAWMMNJNXGCNN
TREASURE BURIED HERE
diana
diana
polyalphabetic
{ "type": "keyword", "value": "RANGER" }
intermediate
en
18
18
cipher_museum
2.0
public
null
null
cda-0004861
WNF PQUFHACD WFBW RBFB WNF UDHFG EP MEUDMUHFDMF WE FBWUACWF VFX JFDSWN
WNF PQUFHACD WFBW RBFB WNF UDHFG EP MEUDMUHFDMF WE FBWUACWF VFX JFDSWN
THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH
monoalphabetic
monoalphabetic
null
{ "alphabet": "CYMHFPSNUTVJADEZOQBWRKLGXI" }
medium
en
59
59
synthetic_educational
null
null
[ "frequency_analysis", "pattern_words", "hill_climbing_lm" ]
Monoalphabetic substitution with an arbitrary 26-letter permutation.
cda-0019283
. .... ... .... ... ... ... .... .... .... . ... ... .... ... ... .. . .... ..... .... ... . ..... ... .... . .. .. . .... ..... .... ... . ... . . .... .... .. .... ... .... ... ... ..... .. .. .... .... .... .. ... . ..... ... ... . ... .... .. ..... .... ... ..... .... .... .. .... ...
. .... ... .... ... ... ... .... .... .... . ... ... .... ... ... .. . .... ..... .... ... . ..... ... .... . .. .. . .... ..... .... ... . ... . . .... .... .. .... ... .... ... ... ..... .. .. .... .... .... .. ... . ..... ... ... . ... .... .. ..... .... ... ..... .... .... .. .... ...
DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION THE VIGENERE CIPHER USES A REPEATING KEYWORD
tap_code
tap_code
null
{}
hard
en
129
129
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.
kl7-111
LSBLBBSRAEDJZZRNEXVMAUDGINKOITLKCQOYKJHYSDSIQNDMURWCDHBPKVZC
LSBLBBSRAEDJZZRNEXVMAUDGINKOITLKCQOYKJHYSDSIQNDMURWCDHBPKVZC
KNOWLEDGE IS POWER AND INFORMATION IS THE KEY TO VICTORY IN ANY CONFLICT
kl7
kl7
machine
{ "type": "seed", "value": "CIPHER" }
expert
en
60
60
cipher_museum
0.2
public
null
null
culper-ring-v3-0066
196 998 818 807 804 817 812 800 813 999 998 812 800 817 802 807 804 803 999 103 100 998 818 804 800 999 998 819 807 817 814 820 806 807 999 297 998 802 820 819 819 808 813 806 999 105 998 818 808 823 819 824 999 998 812 808 811 804 999 998 822 808 803 804 999 998 815 800 819 807 999 101 998 817 820 808 813 999
196 998 818 807 804 817 812 800 813 999 998 812 800 817 802 807 804 803 999 103 100 998 818 804 800 999 998 819 807 817 814 820 806 807 999 297 998 802 820 819 819 808 813 806 999 105 998 818 808 823 819 824 999 998 812 808 811 804 999 998 822 808 803 804 999 998 815 800 819 807 999 101 998 817 820 808 813 999
GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN
culper_ring
culper_ring
codebook
{ "type": "none", "value": null }
expert
en
234
311
cipher_museum
2.0
public
null
null
lorenz-v3-0126
TREASUREBURIEDHERE
TREASUREBURIEDHERE
TREASURE BURIED HERE
lorenz
lorenz
machine
{ "type": "seed", "value": "FISH" }
expert
en
18
18
cipher_museum
2.0
public
null
null
chaocipher-211
GNVMXLOSFCDHTUBBMOGEYIBLXWVBREVOXLDDRMXNSZKWJOEYRSZRLMDBC
GNVMXLOSFCDHTUBBMOGEYIBLXWVBREVOXLDDRMXNSZKWJOEYRSZRLMDBC
WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "MUSEUM" }
advanced
en
57
57
cipher_museum
0.2
public
null
null
vigenere-la-060
GGJJKWDLQJGIO
GGJJKWDLQJGIO
E PLURIBUS UNUM
vigenere
vigenere
polyalphabetic
{ "type": "keyword", "value": "CRYPTO" }
intermediate
la
13
13
cipher_museum
0.2
public
null
null
vigenere-521
VAQRBXNLVBESHVTSPVZVLGRRYWLSECFYWCZAUEKCJCIEAHF
VAQRBXNLVBESHVTSPVZVLGRRYWLSECFYWCZAUEKCJCIEAHF
ASK NOT WHAT YOUR COUNTRY CAN DO FOR YOU BUT WHAT YOU CAN DO
vigenere
vigenere
polyalphabetic
{ "type": "keyword", "value": "VIGENERE" }
intermediate
en
47
47
cipher_museum
0.2
public
null
null
bifid-v3-0293
SDECFRFDPKNCLLBK
SDECFRFDPKNCLLBK
THE SENATE DECREES
bifid
bifid
fractionation
{ "type": "keyword", "value": "FREEDOM" }
advanced
en
16
16
cipher_museum
2.0
public
null
null
kryha-v3-0082
GDDWGFWRCRLQHKHUWOJIAAFZQMBASZDSRJOUAZSXTCPDLQPZGRIUCFATPDOAXTXPZFLJZMCWWUHFOXGLERAWX
GDDWGFWRCRLQHKHUWOJIAAFZQMBASZDSRJOUAZSXTCPDLQPZGRIUCFATPDOAXTXPZFLJZMCWWUHFOXGLERAWX
CONGRESS SHALL MAKE NO LAW RESPECTING AN ESTABLISHMENT OF RELIGION OR PROHIBITING THE FREE EXERCISE
kryha
kryha
machine
{ "type": "keyword", "value": "MUNICH" }
expert
en
85
85
cipher_museum
2.0
public
null
null
homophonic-003
80 85 72 19 29 38 22 10 91 80 58 10 67 67 36 22
80 85 72 19 29 38 22 10 91 80 58 10 67 67 36 22
PROCEED AS PLANNED
homophonic
homophonic
substitution
{ "type": "keyword", "value": "CIPHER" }
intermediate
en
32
47
cipher_museum
0.2
public
null
null
stager-route-v2-0420
TRDTHIUHEEDRORLCOOUUGNVURESHAMNSEEOGEOVOFETSXHRT
TRDTHIUHEEDRORLCOOUUGNVURESHAMNSEEOGEOVOFETSXHRT
THE COURSE OF TRUE LOVE NEVER DID RUN SMOOTH THROUGH AGES
stager_route
stager_route
transposition
{ "type": "integer", "value": 12 }
expert
en
48
48
cipher_museum
2.0
public
null
null
stager-route-v3-0218
PASERTRASAXPEXXRAXXADX
PASERTRASAXPEXXRAXXADX
PER ASPERA AD ASTRA
stager_route
stager_route
transposition
{ "type": "integer", "value": 11 }
expert
en
22
22
cipher_museum
2.0
public
null
null
joseon-yeokhak-v3-0382
YSDADWGHGAFLWVZAKLWDWKUGHWSLLZWZWSNWFKSFVUGFXAJEWVLZSLLZWWSJLZGJTALKLZWKMF
YSDADWGHGAFLWVZAKLWDWKUGHWSLLZWZWSNWFKSFVUGFXAJEWVLZSLLZWWSJLZGJTALKLZWKMF
GALILEO POINTED HIS TELESCOPE AT THE HEAVENS AND CONFIRMED THAT THE EARTH ORBITS THE SUN
joseon_yeokhak
joseon_yeokhak
substitution
{ "type": "keyword", "value": "DYNASTY" }
beginner
en
74
74
cipher_museum
2.0
public
null
null
columnar-transposition-v2-1201
HNOTHAENNSHONGGEHEHHRWNCEBICDADRDSPFDENDEENADEUEFTIGAENEAKATEPIENRTVTTASOAE
HNOTHAENNSHONGGEHEHHRWNCEBICDADRDSPFDENDEENADEUEFTIGAENEAKATEPIENRTVTTASOAE
IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP
columnar_transposition
columnar_transposition
transposition
{ "type": "keyword", "value": "WISDOM" }
intermediate
en
75
75
cipher_museum
2.0
public
null
null
hill-v3-0503
WVECLOYUKIGKXCZUZOHGNAVBVADSAMWEEJWWXWVAWHAOOYSFUUXZZAFEASEYXDMADYECKUQFRCEYDFDQ
WVECLOYUKIGKXCZUZOHGNAVBVADSAMWEEJWWXWVAWHAOOYSFUUXZZAFEASEYXDMADYECKUQFRCEYDFDQ
THE ENIGMA MACHINE HAD AN ASTRONOMICAL NUMBER OF POSSIBLE SETTINGS MAKING IT SEEM UNBREAKABLE
hill
hill
polygraphic
{ "a": 11, "b": 3, "c": 2, "d": 5 }
advanced
en
80
80
cipher_museum
2.0
public
null
null
kryha-v3-0013
UPTPNZRTISMTSVABMOVOQ
UPTPNZRTISMTSVABMOVOQ
THE CASTLE IS SURROUNDED
kryha
kryha
machine
{ "type": "keyword", "value": "MUNICH" }
expert
en
21
21
cipher_museum
2.0
public
null
null
vic-v3-0023
819222904832408047
819222904832408047
FULL SAIL AHEAD
vic
vic
substitution
{ "type": "keyword", "value": "HOLLOW" }
advanced
en
18
18
cipher_museum
2.0
public
null
null
cda-0003043
PROI SAFG WGGV SESQ VBFB QOYA NIWU RNSE SOAR RRQF LBHF WHFS ZSSJ RDMF KGGS AASS QEOA VCAS GGFV ESOG ACQS Z
PROI SAFG WGGV SESQ VBFB QOYA NIWU RNSE SOAR RRQF LBHF WHFS ZSSJ RDMF KGGS AASS QEOA VCAS GGFV ESOG ACQS Z
BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF EVERY SYSTEM NEEDS AN HONEST THREAT MODEL
porta
porta
null
{ "key": "KEY" }
hard
en
85
85
synthetic_educational
null
null
[ "kasiski_examination", "index_of_coincidence" ]
Porta: 13-row table polyalphabetic cipher; reciprocal (encrypt = decrypt).
hill-v2-0282
WYFJEMYUZHXYYHUUFRTB
WYFJEMYUZHXYYHUUFRTB
WISDOM GUARDS THE GATE
hill
hill
polygraphic
{ "a": 7, "b": 3, "c": 4, "d": 5 }
advanced
en
20
20
cipher_museum
2.0
public
null
null
caesar-183
MAX XTZEX ATL ETGWXW
MAX XTZEX ATL ETGWXW
THE EAGLE HAS LANDED
caesar
caesar
substitution
{ "type": "shift", "value": 19 }
beginner
en
17
20
cipher_museum
0.2
public
null
null
affine-v3-0212
OEV QVBHZWL LOJWS IVJSD
OEV QVBHZWL LOJWS IVJSD
THE LEGIONS STAND READY
affine
affine
substitution
{ "a": 3, "b": 9 }
beginner
en
20
23
cipher_museum
2.0
public
null
null
cda-0017124
25 88 22 66 15 64 33 53 45 61 21 72 93 81 87 66 62 22 70 21 23 66 11 1 32 11 22 46 14 96 87 39 14 23 40 76 52 48 58 81 22 15 87 34 92 63 91 59 72 15 93 43 70 76 60 67 3 45 80 48 81 67 41 30 22 60 60 23 58 61 3 48 36 14 48 70 21 92 26 67 50 22 3 79 82 67 30 33 48 79 59 64 23 70 35 23 35 76 4 33 43 67 23 61 26 3 23 87 76...
25 88 22 66 15 64 33 53 45 61 21 72 93 81 87 66 62 22 70 21 23 66 11 1 32 11 22 46 14 96 87 39 14 23 40 76 52 48 58 81 22 15 87 34 92 63 91 59 72 15 93 43 70 76 60 67 3 45 80 48 81 67 41 30 22 60 60 23 58 61 3 48 36 14 48 70 21 92 26 67 50 22 3 79 82 67 30 33 48 79 59 64 23 70 35 23 35 76 4 33 43 67 23 61 26 3 23 87 76...
THE INDEX OF COINCIDENCE IS A USEFUL CLUE MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE
homophonic
homophonic
null
{}
hard
en
117
117
synthetic_educational
null
null
[ "frequency_analysis", "multiple_ciphertext_attack" ]
Homophonic substitution: each letter maps to multiple possible numbers.
cda-0019192
44 23 15 12 15 43 44 31 15 43 43 34 33 43 43 23 34 52 52 23 15 42 15 44 23 15 32 15 44 23 34 14 21 11 24 31 43 44 23 15 15 33 24 22 32 11 32 11 13 23 24 33 15 45 43 15 14 42 34 44 34 42 43 44 34 13 42 15 11 44 15 11 35 34 31 54 11 31 35 23 11 12 15 44 24 13 13 24 35 23 15 42
44 23 15 12 15 43 44 31 15 43 43 34 33 43 43 23 34 52 52 23 15 42 15 44 23 15 32 15 44 23 34 14 21 11 24 31 43 44 23 15 15 33 24 22 32 11 32 11 13 23 24 33 15 45 43 15 14 42 34 44 34 42 43 44 34 13 42 15 11 44 15 11 35 34 31 54 11 31 35 23 11 12 15 44 24 13 13 24 35 23 15 42
THE BEST LESSONS SHOW WHERE THE METHOD FAILS THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER
polybius
polybius
null
{}
hard
en
92
92
synthetic_educational
null
null
[ "pair_decode", "frequency_analysis" ]
Polybius square: 5×5 grid maps letters to two-digit row-column pairs.
cda-0021453
HBMLU PTUGF XWWTJ ZRZEI STTKU YETZT UCSCI TUMOU RWBHZ HXLFP JXCIW GCEYJ BERPR PPIIK ULFSL DSXGM ZSJEN FPTFZ MAFWN HVEDE HTUIK NPPRV ZLRND EVWBI DSISR DXUGU LXINH BBTXB TNUIG UGEAD WSYSY GLTVV OIEJL WETTT UCFEG DVBRW MYYVV LRCJL X
HBMLU PTUGF XWWTJ ZRZEI STTKU YETZT UCSCI TUMOU RWBHZ HXLFP JXCIW GCEYJ BERPR PPIIK ULFSL DSXGM ZSJEN FPTFZ MAFWN HVEDE HTUIK NPPRV ZLRND EVWBI DSISR DXUGU LXINH BBTXB TNUIG UGEAD WSYSY GLTVV OIEJL WETTT UCFEG DVBRW MYYVV LRCJL X
HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING
running_key
running_key
null
{}
hard
en
191
191
synthetic_educational
null
null
[ "index_of_coincidence", "probable_plaintext" ]
Running-key cipher: Vigenère with a very long key (e.g. a book passage).
cda-0004212
GUR IVTRARER PVCURE HFRF N ERCRNGVAT XRLJBEQ BOFREINOYR RIVQRAPR PBZRF ORSBER PBASVQRAPR GUR RAVTZN ZNPUVAR HFRQ EBGBEF GB PERNGR N CBYLNYCUNORGVP PVCURE GUR ZRFFNTR JNF UVQQRA OHG ABG FRPHER FYBJYL
GUR IVTRARER PVCURE HFRF N ERCRNGVAT XRLJBEQ BOFREINOYR RIVQRAPR PBZRF ORSBER PBASVQRAPR GUR RAVTZN ZNPUVAR HFRQ EBGBEF GB PERNGR N CBYLNYCUNORGVP PVCURE GUR ZRFFNTR JNF UVQQRA OHG ABG FRPHER FYBJYL
THE VIGENERE CIPHER USES A REPEATING KEYWORD OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER THE MESSAGE WAS HIDDEN BUT NOT SECURE SLOWLY
rot13
rot13
null
{ "shift": 13 }
hard
en
169
169
synthetic_educational
null
null
[ "brute_force_26", "self_inverse_check" ]
ROT-13 is Caesar with shift 13 — it is its own inverse.
cda-0019025
17 59 50 25 76 34 49 35 82 96 21 49 63 17 48 3 50 1 58 33 60 33 27 87 17 23 34 43 81 72 60 63 58 26 91 22 35 68 49 26 70 43 14 67 11 60 49 60 14 25 93 76 99 21 93 63 88 48 34 50 40 2 63 33 2 35 88 96 33 25 91 23 3 68 72 2 52 59 46 61 23 58 33 15 68 30 23 25 25 23 34 91 72 40 72 34 3 26 86
17 59 50 25 76 34 49 35 82 96 21 49 63 17 48 3 50 1 58 33 60 33 27 87 17 23 34 43 81 72 60 63 58 26 91 22 35 68 49 26 70 43 14 67 11 60 49 60 14 25 93 76 99 21 93 63 88 48 34 50 40 2 63 33 2 35 88 96 33 25 91 23 3 68 72 2 52 59 46 61 23 58 33 15 68 30 23 25 25 23 34 91 72 40 72 34 3 26 86
HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER TOMORROW
homophonic
homophonic
null
{}
hard
en
99
99
synthetic_educational
null
null
[ "frequency_analysis", "multiple_ciphertext_attack" ]
Homophonic substitution: each letter maps to multiple possible numbers.
cda-0021558
5.4.11 15.36.14 3.5.15 13.20.9 11.6.3 8.2.14 16.34.6 2.50.3 4.27.12 2.4.12 19.44.15 17.26.8 18.23.14 4.36.10 9.42.1 20.41.6 4.34.3 7.23.11 4.37.15 7.27.10 12.10.11 5.15.8 18.30.2 1.7.14 15.31.15 20.5.7 6.48.15 18.9.13 13.43.6 11.48.11 19.43.11 3.23.8 9.33.7 6.10.14 10.1.3 13.37.12 15.11.12 20.1.15 3.20.15 15.50.15 17.3...
5.4.11 15.36.14 3.5.15 13.20.9 11.6.3 8.2.14 16.34.6 2.50.3 4.27.12 2.4.12 19.44.15 17.26.8 18.23.14 4.36.10 9.42.1 20.41.6 4.34.3 7.23.11 4.37.15 7.27.10 12.10.11 5.15.8 18.30.2 1.7.14 15.31.15 20.5.7 6.48.15 18.9.13 13.43.6 11.48.11 19.43.11 3.23.8 9.33.7 6.10.14 10.1.3 13.37.12 15.11.12 20.1.15 3.20.15 15.50.15 17.3...
AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT
book_cipher
book_cipher
null
{}
hard
en
102
102
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Book cipher: coordinates (page.line.word) referencing a shared document.
cda-0003540
WPBD PYDR ZXEB HERB PIUR PGBE GLER YBBU KDZE ZKSD PDWL EPIB ZDPY KHTD BHGL DUPY EPSD EKBS WYLU EQBD DPFB D
WPBD PYDR ZXEB HERB PIUR PGBE GLER YBBU KDZE ZKSD PDWL EPIB ZDPY KHTD BHGL DUPY EPSD EKBS WYLU EQBD DPFB D
CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES
monoalphabetic
monoalphabetic
null
{ "alphabet": "PGWHBXFRZCMIQSKUAYDETNOJLV" }
hard
en
85
85
synthetic_educational
null
null
[ "frequency_analysis", "pattern_words", "hill_climbing_lm" ]
Monoalphabetic substitution with an arbitrary 26-letter permutation.
cda-0016858
YHMTPOSPSIKGICQAWYEGRWLAMDSLUY
YHMTPOSPSIKGICQAWYEGRWLAMDSLUY
FAIL CLOSED IS A POSTURE NOT A SLOGAN
running_key
running_key
null
{}
medium
en
30
30
synthetic_educational
null
null
[ "index_of_coincidence", "probable_plaintext" ]
Running-key cipher: Vigenère with a very long key (e.g. a book passage).
nomenclator-v2-0140
16 18 05 19 19 60 90
16 18 05 19 19 60 90
PRESS THE ATTACK
nomenclator
nomenclator
nomenclator
{ "type": "seed", "value": "PALACE" }
expert
en
14
20
cipher_museum
2.0
public
null
null
lorenz-v2-0038
FLEETASSEMBLESATHARBOR
FLEETASSEMBLESATHARBOR
FLEET ASSEMBLES AT HARBOR
lorenz
lorenz
machine
{ "type": "seed", "value": "TUNNY" }
expert
en
22
22
cipher_museum
2.0
public
null
null
atbash-v2-0006
GSV KZHH RH SVOW
GSV KZHH RH SVOW
THE PASS IS HELD
atbash
atbash
substitution
{ "type": "none", "value": null }
beginner
en
13
16
cipher_museum
2.0
public
null
null
hill-008
LGQLJWAYDADP
LGQLJWAYDADP
HOLD POSITION
hill
hill
polygraphic
{ "a": 3, "b": 3, "c": 2, "d": 5 }
advanced
en
12
12
cipher_museum
0.2
public
null
null
vigenere-v2-1201
RHLAMDIPCFGQPKPIVVZGECYVMPGLNUNXVCRMNZXMCVCBSGLFEAEFXAUAJMMIWPXQYXTKGSOXWXX
RHLAMDIPCFGQPKPIVVZGECYVMPGLNUNXVCRMNZXMCVCBSGLFEAEFXAUAJMMIWPXQYXTKGSOXWXX
IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP
vigenere
vigenere
polyalphabetic
{ "type": "keyword", "value": "JUSTICE" }
intermediate
en
75
75
cipher_museum
2.0
public
null
null
scytale-280
WIEALUEGBNLRSHEDNRHTAWEEAOCEVNLNHSEDLTEHREFHSASR
WIEALUEGBNLRSHEDNRHTAWEEAOCEVNLNHSEDLTEHREFHSASR
WE SHALL FIGHT ON THE BEACHES AND WE SHALL NEVER SURRENDER
scytale
scytale
transposition
{ "type": "integer", "value": 6 }
intermediate
en
48
48
cipher_museum
0.2
public
null
null
diana-297
WUAOVALGEPHMNTQNYZAGEPIXAKAEMHAKPSTTAHRCMHLNQWVWSNATENYMEBYJATQNFALIRSAHXJQCFMRZRCJXANFKIHEDEYZYNJIOIXBJNSTSQAPSTTEUGGSIAIUPQTWLBNFWGHILIHXJXGUHZTXVAWEVOPI
WUAOVALGEPHMNTQNYZAGEPIXAKAEMHAKPSTTAHRCMHLNQWVWSNATENYMEBYJATQNFALIRSAHXJQCFMRZRCJXANFKIHEDEYZYNJIOIXBJNSTSQAPSTTEUGGSIAIUPQTWLBNFWGHILIHXJXGUHZTXVAWEVOPI
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
diana
diana
polyalphabetic
{ "type": "keyword", "value": "ENIGMA" }
intermediate
en
155
155
cipher_museum
0.2
public
null
null
bifid-v2-0489
LRSVBBUDDGR
LRSVBBUDDGR
KNOW THYSELF
bifid
bifid
fractionation
{ "type": "keyword", "value": "JUSTICE" }
advanced
en
11
11
cipher_museum
2.0
public
null
null
diana-v3-0109
ABKPFHEOWNIWLHZX
ABKPFHEOWNIWLHZX
SOUND THE TRUMPETS
diana
diana
polyalphabetic
{ "type": "keyword", "value": "SPECIAL" }
intermediate
en
16
16
cipher_museum
2.0
public
null
null
alberti-disk-v2-0127
MGVEHFHMVWNA
MGVEHFHMVWNA
THE DIE IS CAST
alberti_disk
alberti_disk
disk
{ "type": "integer", "value": 5 }
expert
en
12
12
cipher_museum
2.0
public
null
null
running-key-v2-0073
WVGBUTNWGTMWO
WVGBUTNWGTMWO
ANNUIT COEPTIS
running_key
running_key
polyalphabetic
{ "type": "text", "value": "Lincoln Second Inaugural" }
intermediate
en
13
13
cipher_museum
2.0
public
null
null
trifid-v2-0251
TDHFMFIUIOUFHTLTUPDDAVVKIXNHDCTPBVVNKDFHRDNVS+NAHIQFHCAFTELYKKRKHOAGAHTUUSCCRUESFNOHIONEKIMDCFSSVOVRFRDAZ+OOIW+LETTGHMZIORYJJNDFLWAZFHCHBWEUCCSWLKLTHHNTNQU+OFTS+DCGDQTHCAOJ
TDHFMFIUIOUFHTLTUPDDAVVKIXNHDCTPBVVNKDFHRDNVS+NAHIQFHCAFTELYKKRKHOAGAHTUUSCCRUESFNOHIONEKIMDCFSSVOVRFRDAZ+OOIW+LETTGHMZIORYJJNDFLWAZFHCHBWEUCCSWLKLTHHNTNQU+OFTS+DCGDQTHCAOJ
THE GREAT CIPHER OF LOUIS XIV INVENTED BY ANTOINE AND BONAVENTURE ROSSIGNOL USED A NOMENCLATOR OF OVER FIVE HUNDRED NUMBERS REPRESENTING SYLLABLES WORDS AND NULLS AND REMAINED UNBROKEN FOR TWO CENTURIES
trifid
trifid
fractionation
{ "type": "keyword", "value": "FORTRESS" }
advanced
en
172
172
cipher_museum
2.0
public
null
null
fractionated-morse-091
EUCBMHBPNCUCUNJIXCAPOMFASATPIASRPFUJOSPRNNFTPMBANJBHTATXBPBGSNNF
EUCBMHBPNCUCUNJIXCAPOMFASATPIASRPFUJOSPRNNFTPMBANJBHTATXBPBGSNNF
WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL
fractionated_morse
fractionated_morse
fractionation
{ "type": "keyword", "value": "CIPHER" }
advanced
en
64
64
cipher_museum
0.2
public
null
null
cda-0006067
NA NSSVAR PVCURE NCCYVRF N YVARNE SHAPGVBA GB RNPU YRGGRE RAGEBCL ZRNFHERF HAPREGNVAGL VA N QVFGEVOHGVBA GUR XNFVFXV RKNZVANGVBA SVAQF ERCRNGRQ GEVTENZF VA PVCUREGRKG
NA NSSVAR PVCURE NCCYVRF N YVARNE SHAPGVBA GB RNPU YRGGRE RAGEBCL ZRNFHERF HAPREGNVAGL VA N QVFGEVOHGVBA GUR XNFVFXV RKNZVANGVBA SVAQF ERCRNGRQ GEVTENZF VA PVCUREGRKG
AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT
rot13
rot13
null
{ "shift": 13 }
hard
en
143
143
synthetic_educational
null
null
[ "brute_force_26", "self_inverse_check" ]
ROT-13 is Caesar with shift 13 — it is its own inverse.
rail-fence-v3-0150
TSHREAFOARCYTRO
TSHREAFOARCYTRO
THE FACTORY ROARS
rail_fence
rail_fence
transposition
{ "type": "integer", "value": 8 }
intermediate
en
15
15
cipher_museum
2.0
public
null
null
cda-0020522
25 80 69 29 61 76 82 57 11 59 61 82 61 68 11 50 25 50 66 61 82 72 59 82 29 52 82 68 61 66 36 82 80 82 65 82 68 66 50 29 25 55 82 43
25 80 69 29 61 76 82 57 11 59 61 82 61 68 11 50 25 50 66 61 82 72 59 82 29 52 82 68 61 66 36 82 80 82 65 82 68 66 50 29 25 55 82 43
GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY
wallis_cipher
wallis_cipher
null
{}
medium
en
44
44
synthetic_educational
null
null
[ "number_substitution_decode", "frequency_analysis" ]
Wallis cipher: each letter mapped to a unique two-digit number from a fixed table.
geheimschreiber-v2-0104
XYLQFGVIMRJFZLNLRTOYYRCBWTUNDKGTYYFKHZNXTMBPEBOMZUVBKBPQNXDANPMSZSBLQCTARTPFVVOWRDFNOK
XYLQFGVIMRJFZLNLRTOYYRCBWTUNDKGTYYFKHZNXTMBPEBOMZUVBKBPQNXDANPMSZSBLQCTARTPFVVOWRDFNOK
HEADQUARTERS CONFIRMS THAT THE INTELLIGENCE REPORT IS ACCURATE AND REQUIRES IMMEDIATE SWIFT ACTION
geheimschreiber
geheimschreiber
machine
{ "type": "seed", "value": "BERLIN" }
expert
en
86
86
cipher_museum
2.0
public
null
null
affine-vh-0035
ZHNW PDFE QFEIRU DU WSR CDEI HUI SR NSHCC NFNWHBU PDF SR XBCC URORE CRW WSR EBJSWRDFN AHCC
ZHNW PDFE QFEIRU DU WSR CDEI HUI SR NSHCC NFNWHBU PDF SR XBCC URORE CRW WSR EBJSWRDFN AHCC
CAST YOUR BURDEN ON THE LORD AND HE SHALL SUSTAIN YOU HE WILL NEVER LET THE RIGHTEOUS FALL
affine
affine
substitution
{ "a": 9, "b": 7 }
beginner
en
73
90
cipher_museum
2.0
public
null
null
playfair-091
EKIKDOECGTABKPTUQUECHEXTPIBKBQYDFCCPTUSVUGPZ
EKIKDOECGTABKPTUQUECHEXTPIBKBQYDFCCPTUSVUGPZ
IN WAR THE MORAL IS TO THE PHYSICAL AS THREE IS TO ONE
playfair
playfair
polygraphic
{ "type": "keyword", "value": "CIPHER" }
intermediate
en
44
44
cipher_museum
0.2
public
null
null
fractionated-morse-164
BGULDDQQDTWVLGUARQMNPDLIMSUJQWUCSQPIKWNQVVDPCDRQBDMDBMGPPDRQCKPB
BGULDDQQDTWVLGUARQMNPDLIMSUJQWUCSQPIKWNQVVDPCDRQBDMDBMGPPDRQCKPB
ELEMENTARY MY DEAR WATSON THE GAME IS AFOOT AND THE CRIMINAL IS CLOSE
fractionated_morse
fractionated_morse
fractionation
{ "type": "keyword", "value": "SECRET" }
advanced
en
64
64
cipher_museum
0.2
public
null
null
cda-0017404
THEEN IGMAZ ACHIN EUSED ROTOZ STOCZ EATEA POLYA LPHAX ETICC IPHER KERCK HOFFS PRINZ IPLEZ AYSTX ESYST EMMUS TBESE CUREE VENIF ENEMZ KNOWS ALGOR ITHMX
THEEN IGMAZ ACHIN EUSED ROTOZ STOCZ EATEA POLYA LPHAX ETICC IPHER KERCK HOFFS PRINZ IPLEZ AYSTX ESYST EMMUS TBESE CUREE VENIF ENEMZ KNOWS ALGOR ITHMX
THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM
commercial_code
commercial_code
null
{}
hard
en
125
125
synthetic_educational
null
null
[ "codebook_frequency", "five_letter_group_analysis" ]
Commercial code: five-letter groups from a codebook, often ending in X or Z.
great-cipher-v2-0034
143 100 159 151 172 170 174 100 111 166 125 141 170 102 151 165
143 100 159 151 172 170 174 100 111 166 125 141 170 102 151 165
NOVUS ORDO SECLORUM
great_cipher
great_cipher
nomenclator
{ "type": "seed", "value": "VERSAILLES" }
expert
en
48
63
cipher_museum
2.0
public
null
null
copiale-v3-0102
B1 L1 R8 G7 B8 R7 M9 A4 O4 G6 B8 M2 C5 Z1 X0 A0 R8 L6 Y6 C4 H7 S7 X7 R5 C0 Y6 P2 C1 R5 O8 P2 T4 T2 T0 T9 N6 O3 R5 U6 T2 J9 G6 K4 I8 Y6 T8 L6 A1 K4 V4 G6 P9 K3 P9 B0 G7 A1 V4 T1 A6 I1 M6 H2 N6 S0 O4 I4 C9 M2 T9 B6 C9 O4 L0 B0 O8 D2 B1 P5 C2 I3 P9 V4 A5 K7 B8 L6 K4 O4 X0 C4 Q6 Q3 O6 O2 Y6 M9 R8 B5 G6 B7 Q7 S3 B0 C4 C1 Q7...
B1 L1 R8 G7 B8 R7 M9 A4 O4 G6 B8 M2 C5 Z1 X0 A0 R8 L6 Y6 C4 H7 S7 X7 R5 C0 Y6 P2 C1 R5 O8 P2 T4 T2 T0 T9 N6 O3 R5 U6 T2 J9 G6 K4 I8 Y6 T8 L6 A1 K4 V4 G6 P9 K3 P9 B0 G7 A1 V4 T1 A6 I1 M6 H2 N6 S0 O4 I4 C9 M2 T9 B6 C9 O4 L0 B0 O8 D2 B1 P5 C2 I3 P9 V4 A5 K7 B8 L6 K4 O4 X0 C4 Q6 Q3 O6 O2 Y6 M9 R8 B5 G6 B7 Q7 S3 B0 C4 C1 Q7...
THE MANHATTAN PROJECT BROUGHT TOGETHER THE GREATEST SCIENTIFIC MINDS OF THE TWENTIETH CENTURY IN A RACE TO BUILD THE ATOMIC BOMB BEFORE NAZI GERMANY COULD DO SO THE EFFORT CHANGED THE WORLD FOREVER
copiale
copiale
substitution
{ "type": "keyword", "value": "MASONIC" }
advanced
en
330
494
cipher_museum
2.0
public
null
null
bazeries-v2-0677
MYLSYRPOMNXPLTMSEELSMFSYHYTSFYPHTGSGDOOADLAYEADYTGPHLMNOARTYJYYDMS
MYLSYRPOMNXPLTMSEELSMFSYHYTSFYPHTGSGDOOADLAYEADYTGPHLMNOARTYJYYDMS
WE ARE SUCH STUFF AS DREAMS ARE MADE ON AND OUR LITTLE LIFE IS ROUNDED WITH A SLEEP
bazeries
bazeries
transposition
{ "type": "integer", "value": 67 }
advanced
en
66
66
cipher_museum
2.0
public
null
null
cda-0021860
. ..... .... .. .... .. ... .... .... .. . ... ... .... .... .. .... .. . ..... . ... .... .... .. .... ... .... ... ... . . ... ... . .... . .... . ..... .... .... . ..... . ... .... .... .. .... ... .... ... ... . . .... .. . ..... .. . .... ..... ... ... . .... . . ... .. . ..... ...
. ..... .... .. .... .. ... .... .... .. . ... ... .... .... .. .... .. . ..... . ... .... .... .. .... ... .... ... ... . . ... ... . .... . .... . ..... .... .... . ..... . ... .... .... .. .... ... .... ... ... . . .... .. . ..... .. . .... ..... ... ... . .... . . ... .. . ..... ...
ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS A TRANSPARENT TOOL SHOULD SHOW ITS REASONING THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF CERTAINLY
tap_code
tap_code
null
{}
hard
en
154
154
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.
rot13-fr-013
NHK NEZRF PVGBLRAF SBEZRM IBF ONGNVYYBAF
NHK NEZRF PVGBLRAF SBEZRM IBF ONGNVYYBAF
AUX ARMES CITOYENS FORMEZ VOS BATAILLONS
rot13
rot13
substitution
{ "type": "none", "value": null }
beginner
fr
35
40
cipher_museum
0.2
public
null
null
voynich-render-v2-0061
oxp jcog uiz yor ei siq uizq yizrgqu rig jcog uizq yizrgqu yor ei siq uiz gieou ore ofjoux
oxp jcog uiz yor ei siq uizq yizrgqu rig jcog uizq yizrgqu yor ei siq uiz gieou ore ofjoux
ASK WHAT YOU CAN DO FOR YOUR COUNTRY NOT WHAT YOUR COUNTRY CAN DO FOR YOU TODAY AND ALWAYS
voynich_render
voynich_render
substitution
{ "type": "none", "value": null }
expert
en
72
90
cipher_museum
2.0
public
null
null
hill-v3-0102
OXUMNNVOWBNNABJFWAKVREMQMDXIMWOXTFOXQKTSRPYORSUYZVTGDEOILDVMPVOXDXICEPSAOXAOEPPLIQNAZIAOXIZABLAVPYRPYGIIVYPHXMHGTSNALSMWHMNNEOMAWXBCUGOXGSODXZPEVORCBJOXSYXZWXHGTSFAKH
OXUMNNVOWBNNABJFWAKVREMQMDXIMWOXTFOXQKTSRPYORSUYZVTGDEOILDVMPVOXDXICEPSAOXAOEPPLIQNAZIAOXIZABLAVPYRPYGIIVYPHXMHGTSNALSMWHMNNEOMAWXBCUGOXGSODXZPEVORCBJOXSYXZWXHGTSFAKH
THE MANHATTAN PROJECT BROUGHT TOGETHER THE GREATEST SCIENTIFIC MINDS OF THE TWENTIETH CENTURY IN A RACE TO BUILD THE ATOMIC BOMB BEFORE NAZI GERMANY COULD DO SO THE EFFORT CHANGED THE WORLD FOREVER
hill
hill
polygraphic
{ "a": 3, "b": 5, "c": 2, "d": 9 }
advanced
en
166
166
cipher_museum
2.0
public
null
null
vernam-v2-0155
UJIDRDIZQTSJHUUYCOOLLXDOTFESEIWEYBHNSTXWMJJFLKOACBFOEJJZKKYLHWEXXQRZRQSSFPB
UJIDRDIZQTSJHUUYCOOLLXDOTFESEIWEYBHNSTXWMJJFLKOACBFOEJJZKKYLHWEXXQRZRQSSFPB
ENEMY FORCES REPORTED MOVING TOWARD GETTYSBURG CAVALRY HAS CONFIRMED THE FULL SIGHTING
vernam
vernam
stream
{ "type": "pad", "value": "QWERTY (repeating)" }
expert
en
75
75
cipher_museum
2.0
public
null
null
lorenz-v2-0163
COWARDSDIEMANYTIMESBEFOTETHEIRDEATHSTHEVALIANTNEVERTASREDEATHBUTONCE
COWARDSDIEMANYTIMESBEFOTETHEIRDEATHSTHEVALIANTNEVERTASREDEATHBUTONCE
COWARDS DIE MANY TIMES BEFORE THEIR DEATHS THE VALIANT NEVER TASTE DEATH BUT ONCE
lorenz
lorenz
machine
{ "type": "seed", "value": "FISH" }
expert
en
68
68
cipher_museum
2.0
public
null
null
monoalphabetic-563
QET DAHK AN PTCP
QET DAHK AN PTCP
THE KING IS DEAD
monoalphabetic
monoalphabetic
substitution
{ "type": "keyword", "value": "CRYPTOKEY" }
beginner
en
13
16
cipher_museum
0.2
public
null
null
trifid-v3-0308
REZUNODFSBFADAGZEREIE+MXW+XGCDECYDQSLQQBJEILRRYUTYERMXXYFQ+J+TSLGKDSSBCTUNXYDNCSI++XCLEIG+LADNKNREEDISCWIBDVBMOPHWFLOACQFDEUBIPGKIELYEPKBRUTBRR+PEDBFKVIPPTTLRPK
REZUNODFSBFADAGZEREIE+MXW+XGCDECYDQSLQQBJEILRRYUTYERMXXYFQ+J+TSLGKDSSBCTUNXYDNCSI++XCLEIG+LADNKNREEDISCWIBDVBMOPHWFLOACQFDEUBIPGKIELYEPKBRUTBRR+PEDBFKVIPPTTLRPK
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
trifid
trifid
fractionation
{ "type": "keyword", "value": "LIBERTY" }
advanced
en
160
160
cipher_museum
2.0
public
null
null
cda-0020148
3.32.10 3.22.15 4.41.15 12.8.10 11.30.9 13.36.3 5.34.15 13.35.11 12.27.10 9.11.15 2.10.2 16.29.2 15.3.10 5.9.6 11.44.9 14.40.8 11.31.1 20.23.7 17.6.10 16.2.5 5.39.2 19.30.2 7.25.10 17.28.14 11.14.15 17.47.10 1.37.14 3.18.8 6.22.5 15.46.6 13.13.5 15.6.13 16.15.10 7.14.7 11.12.11 10.14.3 5.7.6 8.30.15 2.20.2 11.39.9 11.1...
3.32.10 3.22.15 4.41.15 12.8.10 11.30.9 13.36.3 5.34.15 13.35.11 12.27.10 9.11.15 2.10.2 16.29.2 15.3.10 5.9.6 11.44.9 14.40.8 11.31.1 20.23.7 17.6.10 16.2.5 5.39.2 19.30.2 7.25.10 17.28.14 11.14.15 17.47.10 1.37.14 3.18.8 6.22.5 15.46.6 13.13.5 15.6.13 16.15.10 7.14.7 11.12.11 10.14.3 5.7.6 8.30.15 2.20.2 11.39.9 11.1...
TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION A TRANSPARENT TOOL SHOULD SHOW ITS REASONING DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION
book_cipher
book_cipher
null
{}
hard
en
130
130
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Book cipher: coordinates (page.line.word) referencing a shared document.
cda-0013285
11 31 11 33 44 45 42 24 33 22 12 42 34 25 15 15 33 24 22 32 11 52 24 44 23 13 42 24 12 43 11 33 14 44 23 15 12 34 32 12 15 32 11 13 23 24 33 15 44 23 15 15 33 24 22 32 11 32 11 13 23 24 33 15 45 43 15 14 42 34 44 34 42 43 44 34 13 42 15 11 44 15 11 35 34 31 54 11 31 35 23 11 12 15 44 24 13 13 24 35 23 15 42
11 31 11 33 44 45 42 24 33 22 12 42 34 25 15 15 33 24 22 32 11 52 24 44 23 13 42 24 12 43 11 33 14 44 23 15 12 34 32 12 15 32 11 13 23 24 33 15 44 23 15 15 33 24 22 32 11 32 11 13 23 24 33 15 45 43 15 14 42 34 44 34 42 43 44 34 13 42 15 11 44 15 11 35 34 31 54 11 31 35 23 11 12 15 44 24 13 13 24 35 23 15 42
ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER
polybius
polybius
null
{}
hard
en
103
103
synthetic_educational
null
null
[ "pair_decode", "frequency_analysis" ]
Polybius square: 5×5 grid maps letters to two-digit row-column pairs.
hill-v2-0443
YOANDNWDHQBLZRSNTEKQQZGXNDSNEHYOVJXKKPOHTRVHDMMAURADSJUDNDWDANNMNDXDVZFRWH
YOANDNWDHQBLZRSNTEKQQZGXNDSNEHYOVJXKKPOHTRVHDMMAURADSJUDNDWDANNMNDXDVZFRWH
I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION
hill
hill
polygraphic
{ "a": 9, "b": 2, "c": 7, "d": 5 }
advanced
en
74
74
cipher_museum
2.0
public
null
null
cda-0012284
raiin sharal aiiin chedal chedy ykcheol dal sheedy qokeedy qotedy shal chol sheol shaiin cheol okshy ykcheol otedy
raiin sharal aiiin chedal chedy ykcheol dal sheedy qokeedy qotedy shal chol sheol shaiin cheol okshy ykcheol otedy
ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS
voynich_render
voynich_render
null
{}
hard
en
97
97
synthetic_educational
null
null
[ "statistical_analysis", "unsolved" ]
Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output.
cda-0021188
. -. - .-. --- .--. -.-- / -- . .- ... ..- .-. . ... / ..- -. -.-. . .-. - .- .. -. - -.-- / .. -. / .- / -.. .. ... - .-. .. -... ..- - .. --- -. / ..-. .-. .. . -.. -- .- -. / . ... - .. -- .- - . -.. / -.- . -.-- / .-.. . -. --. - .... / ..-. .-. --- -- / ... - .- - .. ... - .. -.-. ...
. -. - .-. --- .--. -.-- / -- . .- ... ..- .-. . ... / ..- -. -.-. . .-. - .- .. -. - -.-- / .. -. / .- / -.. .. ... - .-. .. -... ..- - .. --- -. / ..-. .-. .. . -.. -- .- -. / . ... - .. -- .- - . -.. / -.- . -.-- / .-.. . -. --. - .... / ..-. .-. --- -- / ... - .- - .. ... - .. -.-. ...
ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS
morse_code
morse_code
null
{}
hard
en
81
81
synthetic_educational
null
null
[ "symbol_decode", "frequency_analysis" ]
Morse code: dots and dashes; word-separated by / symbol.
vigenere-v2-0246
YVVYLRVSRSEMRPHJTPCXDSXUTADNEMUSYWFGZWLZFHFYIIHJTRLVZRYSYCEXGSAFYSZMYIJWCOTMCCGJFDGKFBAEFHVEPEEWXGRZVWWDJQKXUELSSCKAVVHGNBKYIIIMJBKEPXZWRSJLRKWKMOMXDISFNBXTEHJWKSIMFTZQXWTTCGGFHSGMJ
YVVYLRVSRSEMRPHJTPCXDSXUTADNEMUSYWFGZWLZFHFYIIHJTRLVZRYSYCEXGSAFYSZMYIJWCOTMCCGJFDGKFBAEFHVEPEEWXGRZVWWDJQKXUELSSCKAVVHGNBKYIIIMJBKEPXZWRSJLRKWKMOMXDISFNBXTEHJWKSIMFTZQXWTTCGGFHSGMJ
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
vigenere
vigenere
polyalphabetic
{ "type": "keyword", "value": "FORTRESS" }
intermediate
en
181
181
cipher_museum
2.0
public
null
null
scytale-v2-0422
CDTFISIEDTXOIIORTAREOXWEMRDHNTANXAMEEEETATCXRASTAVNSHEXDNBHTAETBXXSYEEHLVEUXX
CDTFISIEDTXOIIORTAREOXWEMRDHNTANXAMEEEETATCXRASTAVNSHEXDNBHTAETBXXSYEEHLVEUXX
COWARDS DIE MANY TIMES BEFORE THEIR DEATHS THE VALIANT NEVER TASTE DEATH BUT ONCE
scytale
scytale
transposition
{ "type": "integer", "value": 11 }
intermediate
en
77
77
cipher_museum
2.0
public
null
null
cda-0017505
13.5.2 11.4.9 14.7.8 3.48.14 19.33.11 14.43.6 19.24.7 11.17.8 17.20.10 3.16.12 9.43.7 15.21.6 5.13.5 1.8.2 18.7.8 11.42.4 17.31.4 5.23.10 2.10.9 16.48.5 16.23.15 1.37.15 5.16.4 19.38.5 2.13.2 14.50.7 8.31.14 13.43.1 10.32.9 15.10.15 16.18.11 12.44.2 19.34.15 20.44.15 20.9.14 17.38.4 10.9.7 4.10.5 15.33.3 6.36.1 20.30.9...
13.5.2 11.4.9 14.7.8 3.48.14 19.33.11 14.43.6 19.24.7 11.17.8 17.20.10 3.16.12 9.43.7 15.21.6 5.13.5 1.8.2 18.7.8 11.42.4 17.31.4 5.23.10 2.10.9 16.48.5 16.23.15 1.37.15 5.16.4 19.38.5 2.13.2 14.50.7 8.31.14 13.43.1 10.32.9 15.10.15 16.18.11 12.44.2 19.34.15 20.44.15 20.9.14 17.38.4 10.9.7 4.10.5 15.33.3 6.36.1 20.30.9...
THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY
book_cipher
book_cipher
null
{}
medium
en
54
54
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Book cipher: coordinates (page.line.word) referencing a shared document.
argenti-v3-0070
52 57 25 66 53 22 32 36 65 72 51 14 88 69 41 66 44 73 22 25 88 75 71 32 56 22 16 14 73 43 88 41 22 57 18 88 30 44 16 51 34 13 65 30 87 72 82 45 22 69 14 43 57 73 14 41 88 22 16 21 73 43 32 82 62 66 14 75 73 41 88 44 24 51
52 57 25 66 53 22 32 36 65 72 51 14 88 69 41 66 44 73 22 25 88 75 71 32 56 22 16 14 73 43 88 41 22 57 18 88 30 44 16 51 34 13 65 30 87 72 82 45 22 69 14 43 57 73 14 41 88 22 16 21 73 43 32 82 62 66 14 75 73 41 88 44 24 51
GALILEO POINTED HIS TELESCOPE AT THE HEAVENS AND CONFIRMED THAT THE EARTH ORBITS THE SUN
argenti
argenti
nomenclator
{ "type": "seed", "value": "ROME" }
expert
en
148
221
cipher_museum
2.0
public
null
null
cda-0017793
K r· L ┐ ⌐ X Γ· X ┐ Γ· L ⌣ ⌐ ┌ Γ· ─ ⌐ K Γ· ┘· ─ ⌐· Γ· ─ Γ X ┌· L ┐· L ⌐ K L Γ K ┌· Γ· ¬· ┌· ⌐ ┌ X Γ· ─ r Γ· ┐· r· L ┌· K L ⌣ K X L r X· ┌· Γ· K ⌒· r └ ⌐ Γ· ┌ X X r· ┘· X· └ Γ ¬ L K L X K L Γ X· ─ Γ L ┌· X r ┌· X· K Γ· ─ ⌒· Γ ┘· X· ¬ └ L K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ ⌐ ┐· ┐· └ Γ· L X r ┘· └ X· ┌ ─ ⌐ ┌· L ─ r ┌· ⌒· ┐· ...
K r· L ┐ ⌐ X Γ· X ┐ Γ· L ⌣ ⌐ ┌ Γ· ─ ⌐ K Γ· ┘· ─ ⌐· Γ· ─ Γ X ┌· L ┐· L ⌐ K L Γ K ┌· Γ· ¬· ┌· ⌐ ┌ X Γ· ─ r Γ· ┐· r· L ┌· K L ⌣ K X L r X· ┌· Γ· K ⌒· r └ ⌐ Γ· ┌ X X r· ┘· X· └ Γ ¬ L K L X K L Γ X· ─ Γ L ┌· X r ┌· X· K Γ· ─ ⌒· Γ ┘· X· ¬ └ L K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ ⌐ ┐· ┐· └ Γ· L X r ┘· └ X· ┌ ─ ⌐ ┌· L ─ r ┌· ⌒· ┐· ...
THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH
pigpen
pigpen
null
{}
hard
en
89
89
synthetic_educational
null
null
[ "symbol_frequency", "grid_position_decode" ]
Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids.
cda-0008459
QVTENCU NAQ GEVTENCU SERDHRAPVRF RKCBFR FVZCYR PVCUREF FYBJYL
QVTENCU NAQ GEVTENCU SERDHRAPVRF RKCBFR FVZCYR PVCUREF FYBJYL
DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS SLOWLY
rot13
rot13
null
{ "shift": 13 }
medium
en
54
54
synthetic_educational
null
null
[]
adfgvx-v3-0410
AXDVDDDXADGXDVDGAFAXDXAFAXGFDAFDGXAFFVFAAFGFAXDAVAVDXAVAFGVAVDVAFAGFGVFFDAVDFAFFXGFAVGVAVDDGFVGFGFDDAAAVFAGDFDADGDGVDFAAAFDFAFVVAXAXDAFFDVADDGGDDDAVDDADAADFAVDVDFGDDDGFDFAFDFAAVDAXFFADVDVGVGXGAGDDDAVDFAVDFDAAVDXDVVFFGAAFFAFFXDVFDXGFGDADFVVADFAVGGDXGFGXAXDFAFAAFVDADFADAGAXDDADGDAAGVGFAFGFGFGVDAAGAGGFDAGXFFFVAAAGAFGFDFAF
AXDVDDDXADGXDVDGAFAXDXAFAXGFDAFDGXAFFVFAAFGFAXDAVAVDXAVAFGVAVDVAFAGFGVFFDAVDFAFFXGFAVGVAVDDGFVGFGFDDAAAVFAGDFDADGDGVDFAAAFDFAFVVAXAXDAFFDVADDGGDDDAVDDADAADFAVDVDFGDDDGFDFAFDFAAVDAXFFADVDVGVGXGAGDDDAVDFAVDFDAAVDXDVVFFGAAFFAFFXDVFDXGFGDADFVVADFAVGGDXGFGXAXDFAFAAFVDADFADAGAXDDADGDAAGVGFAFGFGFGVDAAGAGGFDAGXFFFVAAAGAFGFDFAF
FOR I KNOW THE THOUGHTS THAT I THINK TOWARD YOU SAITH THE LORD THOUGHTS OF PEACE AND NOT OF EVIL TO GIVE YOU AN EXPECTED END THEN SHALL YE CALL UPON ME AND YE SHALL GO AND PRAY UNTO ME AND I WILL HEARKEN
adfgvx
adfgvx
fractionation
{ "polybius": "DRAGON", "columnar": "THUNDER" }
advanced
en
320
320
cipher_museum
2.0
public
null
null
columnar-transposition-v3-0370
HYRASOTDRERISDSFSUFEUGEITTUSYFREOONLSHSSYTLUMTEEOOBOHHESATNAEOBTTFTRHSNARI
HYRASOTDRERISDSFSUFEUGEITTUSYFREOONLSHSSYTLUMTEEOOBOHHESATNAEOBTTFTRHSNARI
THE LIGHT YOU SEE FROM DISTANT STARS LEFT THOSE SUNS THOUSANDS OF YEARS BEFORE YOUR BIRTH
columnar_transposition
columnar_transposition
transposition
{ "type": "keyword", "value": "WARRIOR" }
intermediate
en
74
74
cipher_museum
2.0
public
null
null
venona-pad-reuse-v2-0091
4HPSGG6EYLKA5B7RKAMBPNGE4HYHGXII2DHPPGZTMJLOOTFABLICFQ6CMCMQ6TTATHPTIAUJ4OHOTVBW
4HPSGG6EYLKA5B7RKAMBPNGE4HYHGXII2DHPPGZTMJLOOTFABLICFQ6CMCMQ6TTATHPTIAUJ4OHOTVBW
THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW
venona_pad_reuse
venona_pad_reuse
stream
{ "type": "keyword", "value": "PALACE" }
expert
en
80
80
cipher_museum
2.0
public
null
null