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
geheimschreiber-v3-0055
ZIIIEYJFNHCCQPUQEPUVIMQIFJGVXMODNANGKHHEZYPVUSOEWBDZEEAIFSHQSMMUSUXVSEMAOVDJZC
ZIIIEYJFNHCCQPUQEPUVIMQIFJGVXMODNANGKHHEZYPVUSOEWBDZEEAIFSHQSMMUSUXVSEMAOVDJZC
SCIENCE WITHOUT RELIGION IS LAME AND RELIGION WITHOUT SCIENCE IS BLIND SAID ALBERT EINSTEIN
geheimschreiber
geheimschreiber
machine
{ "type": "seed", "value": "BERLIN" }
expert
en
78
78
cipher_museum
2.0
public
null
null
cda-0017125
. .... ... .... ... ... ... .... .... .... . ... ... .... ... ... .. . .... ..... .... ... . ..... ... .... . .. .. . .... ..... .... ... . ... . . .... .... .. .... ... .... ... ... ..... .. .. .... .... .... .. ... . ..... ... ... . ... .... .. ..... .... ... ..... .... .... .. .... ...
. .... ... .... ... ... ... .... .... .... . ... ... .... ... ... .. . .... ..... .... ... . ..... ... .... . .. .. . .... ..... .... ... . ... . . .... .... .. .... ... .... ... ... ..... .. .. .... .... .... .. ... . ..... ... ... . ... .... .. ..... .... ... ..... .... .... .. .... ...
DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION
tap_code
tap_code
null
{}
medium
en
37
37
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.
solitaire-071
UBGFXWLXLBRZP
UBGFXWLXLBRZP
CHANGE OF PLANS
solitaire
solitaire
stream
{ "type": "passphrase", "value": "CRYPTONOMICON" }
expert
en
13
13
cipher_museum
0.2
public
null
null
voynich-render-v3-0077
gqoedyqosg kx gcd oqg is yirezygkrh yivdqg indqogkirx jkgcizg ofdqgkrh gcd innixkgkir gi uizq nqdxdryd
gqoedyqosg kx gcd oqg is yirezygkrh yivdqg indqogkirx jkgcizg ofdqgkrh gcd innixkgkir gi uizq nqdxdryd
TRADECRAFT IS THE ART OF CONDUCTING COVERT OPERATIONS WITHOUT ALERTING THE OPPOSITION TO YOUR PRESENCE
voynich_render
voynich_render
substitution
{ "type": "none", "value": null }
expert
en
88
102
cipher_museum
2.0
public
null
null
running-key-v2-0075
EVZVPWPBTYLH
EVZVPWPBTYLH
IN GOD WE TRUST
running_key
running_key
polyalphabetic
{ "type": "text", "value": "Lincoln Second Inaugural" }
intermediate
en
12
12
cipher_museum
2.0
public
null
null
hill-v3-0178
JCJBLIVRLYDOWGKSUECAYXJODAOXAMJCJBLIKSZDNIQEPZLYYIYXHVRGFGBVZVSTTDESIMJG
JCJBLIVRLYDOWGKSUECAYXJODAOXAMJCJBLIKSZDNIQEPZLYYIYXHVRGFGBVZVSTTDESIMJG
DO UNTO OTHERS AS YOU WOULD HAVE THEM DO UNTO YOU THIS IS THE GOLDEN RULE OF ALL RELIGIONS
hill
hill
polygraphic
{ "a": 5, "b": 7, "c": 2, "d": 9 }
advanced
en
72
72
cipher_museum
2.0
public
null
null
pigpen-v3-0017
╳ ┬ ┼ ┴• ┐ ┼• ┌ ├ ┼ ├• ⌐ ┼• ├ ╲ ┤ ┼ ⌐ ¬• ╳ ▽
╳ ┬ ┼ ┴• ┐ ┼• ┌ ├ ┼ ├• ⌐ ┼• ├ ╲ ┤ ┼ ⌐ ¬• ╳ ▽
THE KING DEMANDS FEALTY
pigpen
pigpen
substitution
{ "type": "none", "value": null }
beginner
en
25
44
cipher_museum
2.0
public
null
null
commercial-code-v3-0003
ZUZUZ WAZUZ SAZUZ QAZUZ GAZUZ XUZUZ ZUZUZ DEZUZ BAZUZ XAZUZ XUZUZ WABAB ZUZUZ CAZUZ BEZUZ LAZUZ PAZUZ ZAZUZ XUZUZ GABAB ZUZUZ SAZUZ RAZUZ GAZUZ XUZUZ KUBAB
ZUZUZ WAZUZ SAZUZ QAZUZ GAZUZ XUZUZ ZUZUZ DEZUZ BAZUZ XAZUZ XUZUZ WABAB ZUZUZ CAZUZ BEZUZ LAZUZ PAZUZ ZAZUZ XUZUZ GABAB ZUZUZ SAZUZ RAZUZ GAZUZ XUZUZ KUBAB
ROME WAS NOT BUILT IN ONE DAY
commercial_code
commercial_code
codebook
{ "type": "none", "value": null }
expert
en
130
155
cipher_museum
2.0
public
null
null
cda-0018050
20 8 5 15 14 5 20 9 13 5 16 1 4 9 19 20 8 5 15 18 5 20 9 3 1 12 12 25 21 14 2 18 5 1 11 1 2 12 5 9 6 21 19 5 4 3 15 18 18 5 3 20 12 25
20 8 5 15 14 5 20 9 13 5 16 1 4 9 19 20 8 5 15 18 5 20 9 3 1 12 12 25 21 14 2 18 5 1 11 1 2 12 5 9 6 21 19 5 4 3 15 18 18 5 3 20 12 25
THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY
aeneas_tacticus
aeneas_tacticus
null
{}
medium
en
54
54
synthetic_educational
null
null
[ "sequential_number_decode", "frequency_analysis" ]
Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26.
red-type-a-095
YRRYBKJEMATAHYHREBFIPBUCIXACOKDFJOIIVMAYDA
YRRYBKJEMATAHYHREBFIPBUCIXACOKDFJOIIVMAYDA
IN WAR THE MORAL IS TO THE PHYSICAL AS THREE IS TO ONE
red_type_a
red_type_a
machine
{ "type": "keyword", "value": "CIPHER" }
advanced
en
42
42
cipher_museum
0.2
public
null
null
caesar-es-003
RA HA YHTNE QR YN ZNAPUN QR PHLB ABZOER AB DHVREB NPBEQNEZR
RA HA YHTNE QR YN ZNAPUN QR PHLB ABZOER AB DHVREB NPBEQNEZR
EN UN LUGAR DE LA MANCHA DE CUYO NOMBRE NO QUIERO ACORDARME
caesar
caesar
substitution
{ "type": "shift", "value": 13 }
beginner
es
48
59
cipher_museum
0.2
public
null
null
enigma-v3-0279
LSUZKMUFNNBBGEIBRJGJGXAIKIUXFWYWMZMQYHXZISXTZFLCRUCEFLWQLWPLUCFREHMMQVSKUFY
LSUZKMUFNNBBGEIBRJGJGXAIKIUXFWYWMZMQYHXZISXTZFLCRUCEFLWQLWPLUCFREHMMQVSKUFY
NEWTON SAW THE APPLE FALL AND INTUITED THE SAME FORCE THAT HOLDS THE PLANETS IN THEIR PATHS
enigma
enigma
machine
{ "type": "rotor_start", "value": "GHI" }
expert
en
75
75
cipher_museum
2.0
public
null
null
confederate-vigenere-180
UVAGXTFENPWBKMUKLXSVVFJUJICBMGYGQUILOMVYSNLXJVOXQEPUMMZEUSIXFTTRGMAGGUJHJEUCSGYEUKLXJIJRZXTIGEGHVIUKSUJICBXAWLKJXHJCQWGKQTVFPHYCKJEUSXVCIHXAKKW
UVAGXTFENPWBKMUKLXSVVFJUJICBMGYGQUILOMVYSNLXJVOXQEPUMMZEUSIXFTTRGMAGGUJHJEUCSGYEUKLXJIJRZXTIGEGHVIUKSUJICBXAWLKJXHJCQWGKQTVFPHYCKJEUSXVCIHXAKKW
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
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "SECRET" }
intermediate
en
143
143
cipher_museum
0.2
public
null
null
caesar-v3-0708
XY ZOBCYX CRKVV LO ROVN DY KXCGOB PYB K MKZSDKV MBSWO EXVOCC YX ZBOCOXDWOXD YP K QBKXN TEBI
XY ZOBCYX CRKVV LO ROVN DY KXCGOB PYB K MKZSDKV MBSWO EXVOCC YX ZBOCOXDWOXD YP K QBKXN TEBI
NO PERSON SHALL BE HELD TO ANSWER FOR A CAPITAL CRIME UNLESS ON PRESENTMENT OF A GRAND JURY
caesar
caesar
substitution
{ "type": "shift", "value": 10 }
beginner
en
74
91
cipher_museum
2.0
public
null
null
trifid-236
RGILBQTLPP+VQSSUNCGFMQQHRPJGPQLDCDRVNRSDMLHSDBVEMBS+TQ+JUYSHPJOHM+MEDKT+NFFFRMKLESQDSTYNMHA+PNIKZKMEWFVZH+YBFXFFOBL+MZHLGMLFLYEBRRRGIFBGBNEHA+VXPHUEX
RGILBQTLPP+VQSSUNCGFMQQHRPJGPQLDCDRVNRSDMLHSDBVEMBS+TQ+JUYSHPJOHM+MEDKT+NFFFRMKLESQDSTYNMHA+PNIKZKMEWFVZH+YBFXFFOBL+MZHLGMLFLYEBRRRGIFBGBNEHA+VXPHUEX
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
trifid
trifid
fractionation
{ "type": "keyword", "value": "MUSEUM" }
advanced
en
149
149
cipher_museum
0.2
public
null
null
nihilist-145
36 56 24 83 56 45 75 40 43 73 56 36 73 37 43 62 66 23 36 67 36 53 36 25 53 36 36 53 36 25 53 40 23 53 49 35
36 56 24 83 56 45 75 40 43 73 56 36 73 37 43 62 66 23 36 67 36 53 36 25 53 36 36 53 36 25 53 40 23 53 49 35
THE ONLY THING WE HAVE TO FEAR IS FEAR ITSELF
nihilist
nihilist
fractionation
{ "polybius": "SECRET", "keyword": "AGENTS" }
advanced
en
72
107
cipher_museum
0.2
public
null
null
cda-0012493
LJXHN ECYET LPQAH ZKQFD YQBOI RFVMD BCXAR XMLSK NXL
LJXHN ECYET LPQAH ZKQFD YQBOI RFVMD BCXAR XMLSK NXL
THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY
one_time_pad
one_time_pad
null
{}
medium
en
43
43
synthetic_educational
null
null
[ "information_theoretic_proof", "key_reuse_attack" ]
One-time pad: theoretically unbreakable if key is truly random and never reused.
m94-v2-0314
DYNBHGQNDHQYZKCHPWRGAPDWBRUQYSVILVVRYDUXUCNFGTBWCHRGZSBPYBLDDWDRLIKSRIZGQV
DYNBHGQNDHQYZKCHPWRGAPDWBRUQYSVILVVRYDUXUCNFGTBWCHRGZSBPYBLDDWDRLIKSRIZGQV
LIBERTÉ ÉGALITÉ FRATERNITÉ OU LA MORT CES MOTS DÉFINISSENT LA REVOLUTION FRANÇAISE DE MIL SEPT
m94
m94
machine
{ "type": "seed", "value": "LIBERTY" }
expert
en
74
74
cipher_museum
2.0
public
null
null
typex-v2-0309
SPMBNJFUGAEGOSORWZGWRKEZUNPSCLUSVYRUQRSLOHSWQFQDRNLAMRTIMCENVYFFBLPOHYX
SPMBNJFUGAEGOSORWZGWRKEZUNPSCLUSVYRUQRSLOHSWQFQDRNLAMRTIMCENVYFFBLPOHYX
WITH MALICE TOWARD NONE WITH CHARITY FOR ALL LET US BIND UP THE NATIONS WOUNDS AND HEAL
typex
typex
machine
{ "type": "keyword", "value": "EMPIRE" }
expert
en
71
71
cipher_museum
2.0
public
null
null
jn25-123
22354 22342 22349 22349 22345 22341 22356 22349 22342 22345 22353 22356 22345 22358 22348 22349 22348
22354 22342 22349 22349 22345 22341 22356 22349 22342 22345 22353 22356 22345 22358 22348 22349 22348
THE EAGLE HAS LANDED
jn25
jn25
codebook
{ "type": "additive", "value": "12345" }
expert
en
85
101
cipher_museum
0.2
public
null
null
one-time-pad-v3-0161
JDIUXYXLFDPSOQUDBKRDKVNUBQNYLRGEYQBUOJPFZPXXHHQJJVGYUAXZGEZIQTTGIFILRXATYNDD
JDIUXYXLFDPSOQUDBKRDKVNUBQNYLRGEYQBUOJPFZPXXHHQJJVGYUAXZGEZIQTTGIFILRXATYNDD
THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC
one_time_pad
one_time_pad
stream
{ "type": "pad", "value": "QWERTY (repeating)" }
expert
en
76
76
cipher_museum
2.0
public
null
null
rot13-v3-0012
QRHF IHYG
QRHF IHYG
DEUS VULT
rot13
rot13
substitution
{ "type": "none", "value": null }
beginner
en
8
9
cipher_museum
2.0
public
null
null
venona-pad-reuse-v2-0131
JIUE2CALLUE4R4Z
JIUE2CALLUE4R4Z
CAVALRY ADVANCES
venona_pad_reuse
venona_pad_reuse
stream
{ "type": "keyword", "value": "LIBERTY" }
expert
en
15
15
cipher_museum
2.0
public
null
null
playfair-v3-0514
EVLZDANEPVVEVNUTLZGVFBQEEVLZGVETCKXDGNEVVEVNBUULDNIAGVRATIQUBPVGXYVAKYKY
EVLZDANEPVVEVNUTLZGVFBQEEVLZGVETCKXDGNEVVEVNBUULDNIAGVRATIQUBPVGXYVAKYKY
IN MY BEGINNING IS MY END AND IN MY END IS MY BEGINNING AS THE QUEEN OF SCOTS KNEW WELL
playfair
playfair
polygraphic
{ "type": "keyword", "value": "JUSTICE" }
intermediate
en
72
72
cipher_museum
2.0
public
null
null
adfgx-120
FDAFGGFGAFADDFDDGDXAFGAG
FDAFGGFGAFADDFDDGDXAFGAG
HOLD POSITION
adfgx
adfgx
fractionation
{ "polybius": "SECRET", "columnar": "AGENTS" }
advanced
en
24
24
cipher_museum
0.2
public
null
null
fialka-v2-0205
ASKGBDKLGOLIBHUFAEPRVSMKTPRGWCJTJVDBTDHMHLVNAKBGXDFDRSWFCUPDELBIOWUSKDRWAKLACZJ
ASKGBDKLGOLIBHUFAEPRVSMKTPRGWCJTJVDBTDHMHLVNAKBGXDFDRSWFCUPDELBIOWUSKDRWAKLACZJ
NATURE IS WRITTEN IN THE LANGUAGE OF MATHEMATICS AND ITS CHARACTERS ARE TRIANGLES AND CIRCLES
fialka
fialka
machine
{ "type": "seed", "value": "KREMLIN" }
expert
en
79
79
cipher_museum
2.0
public
null
null
purple-133
YLFNOWRNJDSIGNP
YLFNOWRNJDSIGNP
ENEMY FORCES NEAR
purple
purple
machine
{ "type": "seed", "value": "SECRET" }
expert
en
15
15
cipher_museum
0.2
public
null
null
columnar-transposition-444
TOONSRNTUE
TOONSRNTUE
TRUST NO ONE
columnar_transposition
columnar_transposition
transposition
{ "type": "keyword", "value": "CRYPTIC" }
intermediate
en
10
10
cipher_museum
0.2
public
null
null
hill-162
DSPGCXLWTIIZSCHVBMIRJAWQYIMZOMNKDISOMKGOYTECKZPOZMYVYMRJHUKSGXKY
DSPGCXLWTIIZSCHVBMIRJAWQYIMZOMNKDISOMKGOYTECKZPOZMYVYMRJHUKSGXKY
CRYPTOGRAPHY IS THE PRACTICE OF SECURING COMMUNICATIONS FROM ADVERSARIES
hill
hill
polygraphic
{ "a": 2, "b": 3, "c": 1, "d": 4 }
advanced
en
64
64
cipher_museum
0.2
public
null
null
straddling-checkerboard-178
7425032509325090234907600134922985274974251364073097602242241282834325024284976423244222349325001932586325028492261522325023722828506632509042332507449282215223250763251322740282832509085
7425032509325090234907600134922985274974251364073097602242241282834325024284976423244222349325001932586325028492261522325023722828506632509042332507449282215223250763251322740282832509085
WHETHER THEREFORE YE EAT OR DRINK OR WHATSOEVER YE DO DO ALL TO THE GLORY OF GOD FOR THE EARTH IS THE LORDS AND THE FULLNESS THEREOF THE WORLD AND THEY THAT DWELL THEREIN
straddling_checkerboard
straddling_checkerboard
substitution
{ "type": "top_row", "value": "EATONSIRE" }
advanced
en
187
187
cipher_museum
0.2
public
null
null
porta-v2-0723
MUYCSWXUTWWBGGSPALOQARIENGGLSJKGORIYJMBMIRXBYAVXNIWRLLAMRTQWSVBRMMBUQRPEUYATVMUIHJ
MUYCSWXUTWWBGGSPALOQARIENGGLSJKGORIYJMBMIRXBYAVXNIWRLLAMRTQWSVBRMMBUQRPEUYATVMUIHJ
THE PACKAGE CONTAINS BLUEPRINTS FOR THE NEW TORPEDO GUIDANCE SYSTEM DELIVER TO ADMIRAL SMITH NOW
porta
porta
polyalphabetic
{ "type": "keyword", "value": "PAPAL" }
intermediate
en
82
82
cipher_museum
2.0
public
null
null
cda-0018432
┘· ¬ X L ┌· K· ⌐ ¬ └ L L K· Γ· Γ L ─ r L r ┘· ┌ L X ¬ L ⌐· ┘· ┌· L r ┘· ─ ⌐· Γ· Γ L ─ r L Γ ┘· X· ¬ └ L K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ ⌐ ┐· ┐· └ Γ· L X r ┘· └ X· ┌ ─ ⌐ ┌· L ─ r ┌· ⌒· ┐· K Γ· ┘· ─ K ⌒ Γ· r L K r· L K· Γ· ¬· L ─ L ┌· L r Γ· ┐· r· L ┌· X· X L X ⌐ ┌· L ┐· L ⌐ K Γ· ─ ¬· ┐ L ⌒· ⌒ ┘· ┌· Γ ⌐ ┌ ┘· Γ L └ r ⌐ ─ ...
┘· ¬ X L ┌· K· ⌐ ¬ └ L L K· Γ· Γ L ─ r L r ┘· ┌ L X ¬ L ⌐· ┘· ┌· L r ┘· ─ ⌐· Γ· Γ L ─ r L Γ ┘· X· ¬ └ L K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ ⌐ ┐· ┐· └ Γ· L X r ┘· └ X· ┌ ─ ⌐ ┌· L ─ r ┌· ⌒· ┐· K Γ· ┘· ─ K ⌒ Γ· r L K r· L K· Γ· ¬· L ─ L ┌· L r Γ· ┐· r· L ┌· X· X L X ⌐ ┌· L ┐· L ⌐ K Γ· ─ ¬· ┐ L ⌒· ⌒ ┘· ┌· Γ ⌐ ┌ ┘· Γ L └ r ⌐ ─ ...
OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE THE VIGENERE CIPHER USES A REPEATING KEYWORD A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG ALWAYS
pigpen
pigpen
null
{}
medium
en
68
68
synthetic_educational
null
null
[ "symbol_frequency", "grid_position_decode" ]
Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids.
scytale-167
VCUNEAEGNMRLIEEEVIDBISAADALTIWLTVIILICNECOAXINSXIQIX
VCUNEAEGNMRLIEEEVIDBISAADALTIWLTVIILICNECOAXINSXIQIX
VENI VIDI VICI I CAME I SAW I CONQUERED ALL IN A SINGLE BATTLE
scytale
scytale
transposition
{ "type": "integer", "value": 4 }
intermediate
en
52
52
cipher_museum
0.2
public
null
null
cda-0015061
12.7.12 8.40.9 8.45.15 9.40.12 4.34.11 19.32.6 18.5.1 14.35.15 1.21.8 1.6.11 15.24.13 13.30.10 3.14.6 1.13.6 13.24.12 13.20.7 11.26.10 20.18.12 15.16.2 17.35.5 14.44.15 3.24.1 13.40.10 1.50.2 9.48.12 6.23.7 19.8.2 3.32.3 14.44.15 6.39.3 4.32.5 20.39.3 4.35.7 19.11.7 19.36.12 14.26.9 8.36.5 9.15.5 13.50.12 9.19.8 2.3.2
12.7.12 8.40.9 8.45.15 9.40.12 4.34.11 19.32.6 18.5.1 14.35.15 1.21.8 1.6.11 15.24.13 13.30.10 3.14.6 1.13.6 13.24.12 13.20.7 11.26.10 20.18.12 15.16.2 17.35.5 14.44.15 3.24.1 13.40.10 1.50.2 9.48.12 6.23.7 19.8.2 3.32.3 14.44.15 6.39.3 4.32.5 20.39.3 4.35.7 19.11.7 19.36.12 14.26.9 8.36.5 9.15.5 13.50.12 9.19.8 2.3.2
SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY
book_cipher
book_cipher
null
{}
medium
en
41
41
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Book cipher: coordinates (page.line.word) referencing a shared document.
cda-0013380
.... .... .. ... . ..... .. .... ... ... . .... . ..... ..... ... ... .... .. . . ... ... .... .. .... ... ... . ... .. .... . .... . ..... ... ... . ... . ..... .. .... .... ... . . .... ..... .... ... . ..... .. . .... ..... ... . . ... ... . .... ..... . ..... . .... ... .... ... ...
.... .... .. ... . ..... .. .... ... ... . .... . ..... ..... ... ... .... .. . . ... ... .... .. .... ... ... . ... .. .... . .... . ..... ... ... . ... . ..... .. .... .... ... . . .... ..... .... ... . ..... .. . .... ..... ... . . ... ... . .... ..... . ..... . .... ... .... ... ...
THE INDEX OF COINCIDENCE IS A USEFUL CLUE DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE
tap_code
tap_code
null
{}
hard
en
120
120
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.
m209-203
MWZTWSAVMZAEA
MWZTWSAVMZAEA
THE KING IS DEAD
m209
m209
machine
{ "type": "seed", "value": "MUSEUM" }
expert
en
13
13
cipher_museum
0.2
public
null
null
venona-pad-reuse-089
JGNNH7UFPMPXC3LV
JGNNH7UFPMPXC3LV
LOCK DOWN ALL GATES
venona_pad_reuse
venona_pad_reuse
stream
{ "type": "keyword", "value": "CIPHER" }
expert
en
16
16
cipher_museum
0.2
public
null
null
hill-v2-0017
YADQRKYOCKMWHGKRWSNJ
YADQRKYOCKMWHGKRWSNJ
CODED MESSAGE FOLLOWS
hill
hill
polygraphic
{ "a": 3, "b": 5, "c": 2, "d": 9 }
advanced
en
20
20
cipher_museum
2.0
public
null
null
geez-monastic-v3-0112
IJTATSZITBTPFTTA
IJTATSZITBTPFTTA
THE SENATE DECREES
geez_monastic
geez_monastic
substitution
{ "type": "keyword", "value": "AXUM" }
advanced
en
16
16
cipher_museum
2.0
public
null
null
gronsfeld-130
ULFTCDOBKGJWEINJZFVGE
ULFTCDOBKGJWEINJZFVGE
THE PACKAGE IS DELIVERED
gronsfeld
gronsfeld
polyalphabetic
{ "type": "numeric", "value": "14142" }
intermediate
en
21
21
cipher_museum
0.2
public
null
null
aeneas-tacticus-018
2 21 18 14 1 6 20 5 18 18 5 1 4 9 14 7
2 21 18 14 1 6 20 5 18 18 5 1 4 9 14 7
BURN AFTER READING
aeneas_tacticus
aeneas_tacticus
steganography
{ "type": "none", "value": null }
expert
en
23
38
cipher_museum
0.2
public
null
null
cda-0002482
HERQE VEUDS ESNNF RLENA LNTRM TLEIC MWCIN OLNIY BOAEK PEREH EDYED PPLIU HEDAA HVQRC ESYTE RITNE NECSF NOHFE AEIIT TDNRE ITDFE EIOAE FUYMT YPARB RSSLC RSOTP OIOEN UGAGS IITPN XEHNS TIAYE CTSRE RUARO BSUCI OSETN TUTRE DSTSD UGWPT COUIL K
HERQE VEUDS ESNNF RLENA LNTRM TLEIC MWCIN OLNIY BOAEK PEREH EDYED PPLIU HEDAA HVQRC ESYTE RITNE NECSF NOHFE AEIIT TDNRE ITDFE EIOAE FUYMT YPARB RSSLC RSOTP OIOEN UGAGS IITPN XEHNS TIAYE CTSRE RUARO BSUCI OSETN TUTRE DSTSD UGWPT COUIL K
DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER A STRONG CLAIM NEEDS STRONG EVIDENCE THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES
double_transposition
double_transposition
null
{ "key1": "LIBERTY", "key2": "PATTERN" }
hard
en
196
196
synthetic_educational
null
null
[ "key_length_search", "anagram_recovery" ]
Double columnar transposition: apply columnar twice for stronger security.
great-cipher-v3-0014
141 100 133 144 108 122 139 133 136 166 110 174 171 102 178
141 100 133 144 108 122 139 133 136 166 110 174 171 102 178
LOWER THE DRAWBRIDGE
great_cipher
great_cipher
nomenclator
{ "type": "seed", "value": "VERSAILLES" }
expert
en
45
59
cipher_museum
2.0
public
null
null
cda-0018444
14.2.1 6.2.8 19.2.10 3.2.7 15.4.3 7.3.5 14.4.5 12.4.9 13.4.7 19.2.9 2.3.10 10.6.2 4.6.6 12.6.5 1.2.6 9.1.5 3.2.4 8.2.4 16.1.3 13.3.7 1.5.8 17.6.10 18.3.2 17.3.8 13.4.9 3.4.10 16.5.3 9.5.8 3.5.3 4.4.4 9.6.9 11.5.8 20.3.2 14.2.5 6.1.6 11.6.2 16.1.10 2.3.10 12.4.2 7.5.4 3.1.2 15.6.6 8.2.6 11.6.8 8.5.10 15.1.4 15.3.3 12.6....
14.2.1 6.2.8 19.2.10 3.2.7 15.4.3 7.3.5 14.4.5 12.4.9 13.4.7 19.2.9 2.3.10 10.6.2 4.6.6 12.6.5 1.2.6 9.1.5 3.2.4 8.2.4 16.1.3 13.3.7 1.5.8 17.6.10 18.3.2 17.3.8 13.4.9 3.4.10 16.5.3 9.5.8 3.5.3 4.4.4 9.6.9 11.5.8 20.3.2 14.2.5 6.1.6 11.6.2 16.1.10 2.3.10 12.4.2 7.5.4 3.1.2 15.6.6 8.2.6 11.6.8 8.5.10 15.1.4 15.3.3 12.6....
THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS
arnold_andre
arnold_andre
null
{}
hard
en
193
193
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Arnold-André book cipher: coordinates (page.section.word) referencing a shared text.
double-transposition-006
LAPDSEOERCDNEPAN
LAPDSEOERCDNEPAN
PROCEED AS PLANNED
double_transposition
double_transposition
transposition
{ "key1": "FIRST", "key2": "SECOND" }
advanced
en
16
16
cipher_museum
0.2
public
null
null
cda-0020308
804 812 801 861 817 844 851 858 999 825 856 999 859 821 812 999 852 813 807 826 847 851 844 807 800 834 999 842 817 999 863 824 818 814 840 813 853 812 999 801 841 811 999 810 814 807 853 873 846 858 854 999 824 858 854 813 833 817 999 854 834 844 867 833 873 999
804 812 801 861 817 844 851 858 999 825 856 999 859 821 812 999 852 813 807 826 847 851 844 807 800 834 999 842 817 999 863 824 818 814 840 813 853 812 999 801 841 811 999 810 814 807 853 873 846 858 854 999 824 858 854 813 833 817 999 854 834 844 867 833 873 999
BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF SLOWLY
culper_ring
culper_ring
null
{}
medium
en
56
56
synthetic_educational
null
null
[ "codebook_frequency", "number_range_analysis" ]
Culper Ring code: Washington's three-digit codebook numbers (800–999 range).
bifid-v2-0268
QZQIQIERFYRDVXNDR
QZQIQIERFYRDVXNDR
NOVUS ORDO SECLORUM
bifid
bifid
fractionation
{ "type": "keyword", "value": "LIBERTY" }
advanced
en
17
17
cipher_museum
2.0
public
null
null
chaocipher-v3-0197
FMGNUOHQVDAVYQSYOUVDJFZMYHGMUCMTWNROJOREVSPWROEWMJBPAJMIDCORTLIBGHMEKMQQVLBVUNSAVYGRIUWNOMMRJYUCZULNYUOCHXMWCAAUYZFXHKYARHSTDISFBVTOKLKDOHDZUJSAVYIZFDXPUGURZWJJHUBFIPUAH
FMGNUOHQVDAVYQSYOUVDJFZMYHGMUCMTWNROJOREVSPWROEWMJBPAJMIDCORTLIBGHMEKMQQVLBVUNSAVYGRIUWNOMMRJYUCZULNYUOCHXMWCAAUYZFXHKYARHSTDISFBVTOKLKDOHDZUJSAVYIZFDXPUGURZWJJHUBFIPUAH
WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL THAT THEY ARE ENDOWED BY THEIR CREATOR WITH CERTAIN UNALIENABLE RIGHTS THAT AMONG THESE ARE LIFE LIBERTY AND THE PURSUIT OF HAPPINESS
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "LIBERTY" }
advanced
en
169
169
cipher_museum
2.0
public
null
null
cda-0012486
. ... . . . ..... .... ... . . .... .. .... ... .. ... .. .... .. . .... .... . ..... . .... .... .... .. ... . ..... . . ... . ... ..... .. ... . . . .. . ..... .... .... . .. ..... .... .... .... .. ... .... .. . ..... . ..... ... ..... ... .... .... ... .. .... .... .... .. .... ...
. ... . . . ..... .... ... . . .... .. .... ... .. ... .. .... .. . .... .... . ..... . .... .... .... .. ... . ..... . . ... . ... ..... .. ... . . . .. . ..... .... .... . .. ..... .... .... .... .. ... .... .. . ..... . ..... ... ..... ... .... .... ... .. .... .... .... .. .... ...
CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS
tap_code
tap_code
null
{}
medium
en
78
78
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.
kama-sutra-v2-0293
WMM EQWE RMZEETGF ZF YKE RKMX KSETY QWBT NKC QTWGX EQWE EKMX
WMM EQWE RMZEETGF ZF YKE RKMX KSETY QWBT NKC QTWGX EQWE EKMX
ALL THAT GLITTERS IS NOT GOLD OFTEN HAVE YOU HEARD THAT TOLD
kama_sutra
kama_sutra
substitution
{ "type": "keyword", "value": "INDIA" }
intermediate
en
49
60
cipher_museum
2.0
public
null
null
columnar-transposition-390
LWAYNRTLAAD
LWAYNRTLAAD
RALLY AT DAWN
columnar_transposition
columnar_transposition
transposition
{ "type": "keyword", "value": "PYTHON" }
intermediate
en
11
11
cipher_museum
0.2
public
null
null
solitaire-v2-0258
OUEIFXIMFQSBY
OUEIFXIMFQSBY
THE PASS IS HELD
solitaire
solitaire
stream
{ "type": "passphrase", "value": "PONTIFEX" }
expert
en
13
13
cipher_museum
2.0
public
null
null
cda-0009679
SWETXTOXTOHEBESEAXESHRFXXHLWMIOHHLSSTDSENE
SWETXTOXTOHEBESEAXESHRFXXHLWMIOHHLSSTDSENE
THE BEST LESSONS SHOW WHERE THE METHOD FAILS
double_transposition
double_transposition
null
{ "key1": "LIBERTY", "key2": "PATTERN" }
medium
en
42
42
synthetic_educational
null
null
[]
bazeries-v2-0221
EYAPYAKBOBNMOTUDYSIBNYPIYFXWTWIJOBPPFTTPPMYWYMTBOBTIEITOEMTYYPBAITPEYMRNQAPTBITGPO
EYAPYAKBOBNMOTUDYSIBNYPIYFXWTWIJOBPPFTTPPMYWYMTBOBTIEITOEMTYYPBAITPEYMRNQAPTBITGPO
THE CIPHER DISK WAS INVENTED BY LEON BATTISTA ALBERTI A RENAISSANCE ARCHITECT AND GREAT HUMANIST
bazeries
bazeries
transposition
{ "type": "integer", "value": 23 }
advanced
en
82
82
cipher_museum
2.0
public
null
null
cardano-autokey-v3-0345
TYNXOIHRCROP
TYNXOIHRCROP
YANKEE DOODLE
cardano_autokey
cardano_autokey
polyalphabetic
{ "type": "keyword", "value": "VENICE" }
advanced
en
12
12
cipher_museum
2.0
public
null
null
bazeries-v3-0317
QTISJPHSMQYAPQYK
QTISJPHSMQYAPQYK
SOUND THE TRUMPETS
bazeries
bazeries
transposition
{ "type": "integer", "value": 41 }
advanced
en
16
16
cipher_museum
2.0
public
null
null
cda-0011350
TTNWHOSOCERTQDBHLSHEDIFIMEEUIUEESEMFNCDESRESTBSHREADOEALFNTIESOETIEINSERCROSOWTHLXNCUTEYIN
TTNWHOSOCERTQDBHLSHEDIFIMEEUIUEESEMFNCDESRESTBSHREADOEALFNTIESOETIEINSERCROSOWTHLXNCUTEYIN
THE BEST LESSONS SHOW WHERE THE METHOD FAILS INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION
scytale
scytale
null
{ "cols": 6 }
hard
en
90
90
synthetic_educational
null
null
[]
hill-v3-0331
DMKCZJTRUUSNUSWYSWLH
DMKCZJTRUUSNUSWYSWLH
THE ALCHEMIST SUCCEEDS
hill
hill
polygraphic
{ "a": 9, "b": 2, "c": 7, "d": 5 }
advanced
en
20
20
cipher_museum
2.0
public
null
null
vigenere-v2-0858
APPIEBDPSWXSZXILFRVBLJSOQBZQRLGQBBPSMWRVAPTUHPNZBKVZYGQLCMFEAIFHLRIZQIHLDX
APPIEBDPSWXSZXILFRVBLJSOQBZQRLGQBBPSMWRVAPTUHPNZBKVZYGQLCMFEAIFHLRIZQIHLDX
LIBERTÉ ÉGALITÉ FRATERNITÉ OU LA MORT CES MOTS DÉFINISSENT LA REVOLUTION FRANÇAISE DE MIL SEPT
vigenere
vigenere
polyalphabetic
{ "type": "keyword", "value": "PHOENIX" }
intermediate
en
74
74
cipher_museum
2.0
public
null
null
cda-0012150
AAAAA BAABA BAAAA AAAAA ABBAA BAAAB ABBBA AAAAA BAAAA AABAA ABBAA BAABA BAABA ABBAB ABBAB ABABA BAAAB AABBB ABBAB BAABB ABABA AAABB BAAAB AABBB ABBAB BABAA ABAAA BAABA BAAAB BAAAA AABAA AAAAA BAAAB ABBAB ABBAA ABAAA ABBAA AABBA BAABA AABBB AABAA AAAAB ABAAA AABAB ABAAA AAABB AAABA ABAAA ABBBA AABBB AABAA BAAAA AAABA AB...
AAAAA BAABA BAAAA AAAAA ABBAA BAAAB ABBBA AAAAA BAAAA AABAA ABBAA BAABA BAABA ABBAB ABBAB ABABA BAAAB AABBB ABBAB BAABB ABABA AAABB BAAAB AABBB ABBAB BABAA ABAAA BAABA BAAAB BAAAA AABAA AAAAA BAAAB ABBAB ABBAA ABAAA ABBAA AABBA BAABA AABBB AABAA AAAAB ABAAA AABAB ABAAA AAABB AAABA ABAAA ABBBA AABBB AABAA BAAAA AAABA AB...
A TRANSPARENT TOOL SHOULD SHOW ITS REASONING THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION
bacon_cipher
bacon_cipher
null
{}
hard
en
460
460
synthetic_educational
null
null
[ "five_bit_decode", "ab_frequency_analysis" ]
Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.
cda-0007237
SERDHRAPL NANYLFVF PNA ERIRNY JRNX PVCUREF SEVRQZNA RFGVZNGRQ XRL YRATGU SEBZ FGNGVFGVPF BOFREINOYR RIVQRAPR PBZRF ORSBER PBASVQRAPR
SERDHRAPL NANYLFVF PNA ERIRNY JRNX PVCUREF SEVRQZNA RFGVZNGRQ XRL YRATGU SEBZ FGNGVFGVPF BOFREINOYR RIVQRAPR PBZRF ORSBER PBASVQRAPR
FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE
rot13
rot13
null
{ "shift": 13 }
hard
en
116
116
synthetic_educational
null
null
[]
morse-code-v2-0010
-... .-. .. -.. --. . / -.. . ... - .-. --- -.-- . -.. / .- - / -.. .- .-- -.
-... .-. .. -.. --. . / -.. . ... - .-. --- -.-- . -.. / .- - / -.. .- .-- -.
BRIDGE DESTROYED AT DAWN
morse_code
morse_code
encoding
{ "type": "none", "value": null }
beginner
en
54
77
cipher_museum
2.0
public
null
null
cda-0016377
12.30.15 9.17.13 2.14.10 17.10.8 19.6.10 20.7.1 20.49.14 9.17.3 16.29.8 1.25.15 6.23.9 18.6.2 20.10.15 18.41.2 10.27.5 14.5.3 4.4.13 9.5.9 8.28.4 4.8.1 18.8.6 11.36.14 6.39.14 16.3.4 17.31.7 16.8.4 3.14.9 16.16.14 4.47.2 11.10.7 5.30.3 5.11.11 13.19.10 9.37.15 14.35.12 19.34.3 12.4.7 14.6.15 10.4.14 16.21.4 13.42.9 19....
12.30.15 9.17.13 2.14.10 17.10.8 19.6.10 20.7.1 20.49.14 9.17.3 16.29.8 1.25.15 6.23.9 18.6.2 20.10.15 18.41.2 10.27.5 14.5.3 4.4.13 9.5.9 8.28.4 4.8.1 18.8.6 11.36.14 6.39.14 16.3.4 17.31.7 16.8.4 3.14.9 16.16.14 4.47.2 11.10.7 5.30.3 5.11.11 13.19.10 9.37.15 14.35.12 19.34.3 12.4.7 14.6.15 10.4.14 16.21.4 13.42.9 19....
BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL A TRANSPARENT TOOL SHOULD SHOW ITS REASONING THE MESSAGE WAS HIDDEN BUT NOT SECURE
book_cipher
book_cipher
null
{}
hard
en
110
110
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Book cipher: coordinates (page.line.word) referencing a shared document.
straddling-checkerboard-v3-0163
62623626148232201423563322241829962090921097399562623872551942197390876212698252322921835562623700914
62623626148232201423563322241829962090921097399562623872551942197390876212698252322921835562623700914
THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN
straddling_checkerboard
straddling_checkerboard
substitution
{ "type": "top_row", "value": "LIONSTRACE" }
advanced
en
101
101
cipher_museum
2.0
public
null
null
arnold-andre-v3-0034
13.1.1 14.3.5 14.3.2 14.1.4 15.1.1 13.1.1 14.2.4 14.4.3 14.3.5 14.3.4 14.4.4 14.2.4 14.1.4 14.1.5 14.4.4 15.1.1 13.1.1 14.2.3 14.3.5 14.3.2 14.1.4 14.4.4 15.1.1
13.1.1 14.3.5 14.3.2 14.1.4 15.1.1 13.1.1 14.2.4 14.4.3 14.3.5 14.3.4 14.4.4 14.2.4 14.1.4 14.1.5 14.4.4 15.1.1 13.1.1 14.2.3 14.3.5 14.3.2 14.1.4 14.4.4 15.1.1
OLD IRONSIDES HOLDS
arnold_andre
arnold_andre
codebook
{ "type": "none", "value": null }
expert
en
138
160
cipher_museum
2.0
public
null
null
kryptos-v3-0337
IUKCCOALYFBXSJZ
IUKCCOALYFBXSJZ
CHART THE UNKNOWN
kryptos
kryptos
polyalphabetic
{ "type": "keyword", "value": "SANBORN" }
advanced
en
15
15
cipher_museum
2.0
public
null
null
confederate-vigenere-v2-0524
GXORLTRKOIPZZLVCCAYXCF
GXORLTRKOIPZZLVCCAYXCF
EXTRACTION POINT CHANGED
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "CAVALRY" }
intermediate
en
22
22
cipher_museum
2.0
public
null
null
scytale-v3-0399
TAHRLFESTRXHMAONPSMSEXEADNUOEAEAXECAOMSTKEKXNHNMBSTIMAXIIAIEIINUBXGNSCRBNGNLXMETAOLGIBEX
TAHRLFESTRXHMAONPSMSEXEADNUOEAEAXECAOMSTKEKXNHNMBSTIMAXIIAIEIINUBXGNSCRBNGNLXMETAOLGIBEX
THE ENIGMA MACHINE HAD AN ASTRONOMICAL NUMBER OF POSSIBLE SETTINGS MAKING IT SEEM UNBREAKABLE
scytale
scytale
transposition
{ "type": "integer", "value": 11 }
intermediate
en
88
88
cipher_museum
2.0
public
null
null
commercial-code-024
ZUZUZ ZAZUZ WAZUZ BEZUZ XAZUZ ZAZUZ XUZUZ LIBAB ZUZUZ SAZUZ RAZUZ GAZUZ XUZUZ
ZUZUZ ZAZUZ WAZUZ BEZUZ XAZUZ ZAZUZ XUZUZ LIBAB ZUZUZ SAZUZ RAZUZ GAZUZ XUZUZ
TRUST NO ONE
commercial_code
commercial_code
codebook
{ "type": "none", "value": null }
expert
en
65
77
cipher_museum
0.2
public
null
null
m94-v2-0276
IUZZOMYJSWMVZSRTYALITLVTWYCGTHGFCYXYWHUVNJWUNMKNRIREOPLKUGFYBEYFPLUWLITIYQK
IUZZOMYJSWMVZSRTYALITLVTWYCGTHGFCYXYWHUVNJWUNMKNRIREOPLKUGFYBEYFPLUWLITIYQK
TRUST IN THE LORD WITH ALL THINE HEART AND LEAN NOT UNTO THINE OWN UNDERSTANDING IN ALL WAYS
m94
m94
machine
{ "type": "seed", "value": "LIBERTY" }
expert
en
75
75
cipher_museum
2.0
public
null
null
navajo-code-025
DIBEH TKIN AH-JAD DZEH TSAH MOASI DZEH / TKIN KLESH / KLIZZIE TLO-CHIN AH-JAD LHA-CHA-EH AH-JAH TSAH
DIBEH TKIN AH-JAD DZEH TSAH MOASI DZEH / TKIN KLESH / KLIZZIE TLO-CHIN AH-JAD LHA-CHA-EH AH-JAH TSAH
SILENCE IS GOLDEN
navajo_code
navajo_code
code
{ "type": "none", "value": null }
expert
en
84
108
cipher_museum
0.2
public
null
null
cda-0013975
. . ... .. ... .... . .... . ..... ... . . ... . . ... ... . ... ... . . . .... ... .... ... .. .... .. . ..... .... ... ..... . . .... .... .... .... . ..... .... .. ... ... .... ... . .. .... ..... .... .... .. .... .... .... . ... . . ... ... . . ... . .... ... ... .... . .. . ....
. . ... .. ... .... . .... . ..... ... . . ... . . ... ... . ... ... . . . .... ... .... ... .. .... .. . ..... .... ... ..... . . .... .... .... .... . ..... .... .. ... ... .... ... . .. .... ..... .... .... .. .... .... .... . ... . . ... ... . . ... . .... ... ... .... . .. . ....
A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS
tap_code
tap_code
null
{}
hard
en
95
95
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.
rail-fence-v2-0545
AGDLTORTLOLAHTNDEAHSOHTAIFUTTSTOOGREYLLENEDITHVTA
AGDLTORTLOLAHTNDEAHSOHTAIFUTTSTOOGREYLLENEDITHVTA
ALL THAT GLITTERS IS NOT GOLD OFTEN HAVE YOU HEARD THAT TOLD
rail_fence
rail_fence
transposition
{ "type": "integer", "value": 11 }
intermediate
en
49
49
cipher_museum
2.0
public
null
null
bazeries-v3-0447
RLPKLPQOHIBGJHPPFXHGI
RLPKLPQOHIBGJHPPFXHGI
SONS OF LIBERTY ASSEMBLE
bazeries
bazeries
transposition
{ "type": "integer", "value": 53 }
advanced
en
21
21
cipher_museum
2.0
public
null
null
cda-0016910
ZOYO IMZE RMRR EIDX CFSO UTDL ZFFQ KBCE HFPF WUFY PAZM FLGU HWEL WZ
ZOYO IMZE RMRR EIDX CFSO UTDL ZFFQ KBCE HFPF WUFY PAZM FLGU HWEL WZ
THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT
vernam
vernam
null
{}
medium
en
54
54
synthetic_educational
null
null
[ "key_reuse_attack", "information_theoretic_proof" ]
Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP.
cda-0018748
K r· L Γ L K L r K Γ· K· L X K X· Γ Γ· L X ┐· ⌐ K K L ┌· ─ X ¬ L ⌐· ┘· ┌· L ┌ ⌐ ┐ Γ· ─ ¬· r └ ⌐ Γ· ┌ X K r· L Γ· ─ Γ L ⌣ ┘· ⌐· r ┘· Γ· ─ r Γ· Γ L ─ r L Γ· X ⌐ X· X L ⌐· X· └ r └ X· L K r· L ┌ L X X ⌐ ¬· L ⌒ ⌐ X r· Γ· Γ Γ L ─ ¬ X· K ─ ┘· K X L r X· ┌· L ┐· ⌐ K K L ┌· ─ ⌒ ┘· ┌· Γ X r· L └ ┐· ¬ ┌· L ⌐ ┐ ┌ ┘· ─ ┘· ⌐ └ ┐· r...
K r· L Γ L K L r K Γ· K· L X K X· Γ Γ· L X ┐· ⌐ K K L ┌· ─ X ¬ L ⌐· ┘· ┌· L ┌ ⌐ ┐ Γ· ─ ¬· r └ ⌐ Γ· ┌ X K r· L Γ· ─ Γ L ⌣ ┘· ⌐· r ┘· Γ· ─ r Γ· Γ L ─ r L Γ· X ⌐ X· X L ⌐· X· └ r └ X· L K r· L ┌ L X X ⌐ ¬· L ⌒ ⌐ X r· Γ· Γ Γ L ─ ¬ X· K ─ ┘· K X L r X· ┌· L ┐· ⌐ K K L ┌· ─ ⌒ ┘· ┌· Γ X r· L └ ┐· ¬ ┌· L ⌐ ┐ ┌ ┘· ─ ┘· ⌐ └ ┐· r...
THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS THE INDEX OF COINCIDENCE IS A USEFUL CLUE THE MESSAGE WAS HIDDEN BUT NOT SECURE PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION
pigpen
pigpen
null
{}
medium
en
76
76
synthetic_educational
null
null
[ "symbol_frequency", "grid_position_decode" ]
Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids.
lorenz-v2-0296
ARMYOFNORTHERNVIRGINIASURRENDERSATAPPOMATTOXCOURTHOUSETHEWARINTHEEASTISOVER
ARMYOFNORTHERNVIRGINIASURRENDERSATAPPOMATTOXCOURTHOUSETHEWARINTHEEASTISOVER
ARMY OF NORTHERN VIRGINIA SURRENDERS AT APPOMATTOX COURTHOUSE THE WAR IN THE EAST IS OVER
lorenz
lorenz
machine
{ "type": "seed", "value": "COLOSSUS" }
expert
en
75
75
cipher_museum
2.0
public
null
null
confederate-vigenere-218
OPGKSGMMBUHTDWYMCMVYYQMDXSEEMMCMZPCSIIZSIYOMF
OPGKSGMMBUHTDWYMCMVYYQMDXSEEMMCMZPCSIIZSIYOMF
THE REPORTS OF MY DEATH HAVE BEEN GREATLY EXAGGERATED
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "VICTORY" }
intermediate
en
45
45
cipher_museum
0.2
public
null
null
affine-v2-1133
DZY QLYOD GITZYL KH JKMIU NIV IBVYBDYP XW OBDKIBY OBP XKBOVYBDMLY LKUUIQBKJ MUYP O BKSYBGJODKL KH KVYL HIVY ZMBPLYP BMSXYLU LYTLYUYBDIBQ UWJJOXJYU EKLPU OBP BMJJU OBP LYSOIBYP MBXLKAYB HKL DEK GYBDMLIYU
DZY QLYOD GITZYL KH JKMIU NIV IBVYBDYP XW OBDKIBY OBP XKBOVYBDMLY LKUUIQBKJ MUYP O BKSYBGJODKL KH KVYL HIVY ZMBPLYP BMSXYLU LYTLYUYBDIBQ UWJJOXJYU EKLPU OBP BMJJU OBP LYSOIBYP MBXLKAYB HKL DEK GYBDMLIYU
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
affine
affine
substitution
{ "a": 9, "b": 14 }
beginner
en
172
202
cipher_museum
2.0
public
null
null
cardano-autokey-v3-0086
MLWATVJGBFTPFEBFENTNLRLTHDHLVGALYHVBXHVLTTXWSRVGKBBHDRFKMVKNGVMHSUKULAGFHXGVBWB
MLWATVJGBFTPFEBFENTNLRLTHDHLVGALYHVBXHVLTTXWSRVGKBBHDRFKMVKNGVMHSUKULAGFHXGVBWB
ALL PERSONS BORN OR NATURALIZED IN THE UNITED STATES ARE CITIZENS SUBJECT TO EQUAL PROTECTION
cardano_autokey
cardano_autokey
polyalphabetic
{ "type": "keyword", "value": "MILAN" }
advanced
en
79
79
cipher_museum
2.0
public
null
null
cda-0019112
6313 2605 1663 3491 0368 06064 2912 6028 03553 2868 1607 7609 0402 4108 2889 4472 00320 6338 2854 04712 4465 01933 2877 4420 1318 05980 05725 01600 5074 1639 00329 06369 1663 1306 6370 05661 2836 02241 5741 0319 4170 5967 2827 4464 00991 2911 5122 02600 1593 05691 6333 1629 07578 06289 6298 2526 1599 4141 1650 6059 059...
6313 2605 1663 3491 0368 06064 2912 6028 03553 2868 1607 7609 0402 4108 2889 4472 00320 6338 2854 04712 4465 01933 2877 4420 1318 05980 05725 01600 5074 1639 00329 06369 1663 1306 6370 05661 2836 02241 5741 0319 4170 5967 2827 4464 00991 2911 5122 02600 1593 05691 6333 1629 07578 06289 6298 2526 1599 4141 1650 6059 059...
THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT THE MESSAGE WAS HIDDEN BUT NOT SECURE KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY
zimmermann
zimmermann
null
{}
hard
en
208
208
synthetic_educational
null
null
[ "codebook_frequency", "number_group_analysis" ]
Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.
scytale-039
FDOTRHTEUBNREAFVAEVWOHROSDTAHREEBTOOLADCATNX
FDOTRHTEUBNREAFVAEVWOHROSDTAHREEBTOOLADCATNX
FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT
scytale
scytale
transposition
{ "type": "integer", "value": 2 }
intermediate
en
44
44
cipher_museum
0.2
public
null
null
chaocipher-v2-0570
GOWWSKBZKAYRFFNVEUUKOFQDZIDEMZFNYMHQTRHKMSMFDHIISWODOQOAGYNWXGMCZVCCIXDQBAKGM
GOWWSKBZKAYRFFNVEUUKOFQDZIDEMZFNYMHQTRHKMSMFDHIISWODOQOAGYNWXGMCZVCCIXDQBAKGM
THE FEAR OF THE LORD IS THE BEGINNING OF WISDOM AND KNOWLEDGE OF THE HOLY ONE IS UNDERSTANDING
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "TRIUMPH" }
advanced
en
77
77
cipher_museum
2.0
public
null
null
typex-v2-0156
IXGQXLYYXAOYULLNIZV
IXGQXLYYXAOYULLNIZV
WISDOM GUARDS THE GATE
typex
typex
machine
{ "type": "keyword", "value": "BRITAIN" }
expert
en
19
19
cipher_museum
2.0
public
null
null
playfair-422
AGQUNCEREBYW
AGQUNCEREBYW
RALLY AT DAWN
playfair
playfair
polygraphic
{ "type": "keyword", "value": "CRYPTO" }
intermediate
en
12
12
cipher_museum
0.2
public
null
null
morse-code-v2-0057
.-- .. - .... / -- .- .-.. .. -.-. . / - --- .-- .- .-. -.. / -. --- -. . / .-- .. - .... / -.-. .... .- .-. .. - -.-- / ..-. --- .-. / .- .-.. .-.. / .-.. . - / ..- ... / -... .. -. -.. / ..- .--. / - .... . / -. .- - .. --- -. ... / .-- --- ..- -. -.. ... / .- -. -.. / .... . .- .-..
.-- .. - .... / -- .- .-.. .. -.-. . / - --- .-- .- .-. -.. / -. --- -. . / .-- .. - .... / -.-. .... .- .-. .. - -.-- / ..-. --- .-. / .- .-.. .-.. / .-.. . - / ..- ... / -... .. -. -.. / ..- .--. / - .... . / -. .- - .. --- -. ... / .-- --- ..- -. -.. ... / .- -. -.. / .... . .- .-..
WITH MALICE TOWARD NONE WITH CHARITY FOR ALL LET US BIND UP THE NATIONS WOUNDS AND HEAL
morse_code
morse_code
encoding
{ "type": "none", "value": null }
beginner
en
200
286
cipher_museum
2.0
public
null
null
cda-0016511
1.28.4 2.16.12 10.11.11 5.16.10 18.24.9 5.22.1 3.38.13 19.43.2 5.4.1 10.20.14 15.8.11 13.19.13 7.7.8 11.3.11 17.3.1 13.31.8 1.34.12 20.2.1 14.6.15 3.5.10 14.2.7 5.15.10 2.31.2 20.33.12 16.21.5 20.2.8 16.41.10 1.14.5 5.17.1 4.20.4 14.21.4 14.40.2 8.27.10 14.18.2 8.46.6 16.19.9 4.16.11 3.15.7 7.29.15 6.5.3 20.41.11 17.20...
1.28.4 2.16.12 10.11.11 5.16.10 18.24.9 5.22.1 3.38.13 19.43.2 5.4.1 10.20.14 15.8.11 13.19.13 7.7.8 11.3.11 17.3.1 13.31.8 1.34.12 20.2.1 14.6.15 3.5.10 14.2.7 5.15.10 2.31.2 20.33.12 16.21.5 20.2.8 16.41.10 1.14.5 5.17.1 4.20.4 14.21.4 14.40.2 8.27.10 14.18.2 8.46.6 16.19.9 4.16.11 3.15.7 7.29.15 6.5.3 20.41.11 17.20...
HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX THE BEST LESSONS SHOW WHERE THE METHOD FAILS
book_cipher
book_cipher
null
{}
hard
en
145
145
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Book cipher: coordinates (page.line.word) referencing a shared document.
m94-112
NHFRXUWTUMCNQXQPDEIHADFHPSXFRXFNBRRFZXSKIVKEGMYOSXMAXBJKGN
NHFRXUWTUMCNQXQPDEIHADFHPSXFRXFNBRRFZXSKIVKEGMYOSXMAXBJKGN
IN THE BEGINNING WAS THE WORD AND THE WORD WAS WITH GOD AND FULL OF GRACE
m94
m94
machine
{ "type": "seed", "value": "CIPHER" }
expert
en
58
58
cipher_museum
0.2
public
null
null
cardano-autokey-v3-0322
KTVRSHTVRADDSLKR
KTVRSHTVRADDSLKR
PER ASPERA AD ASTRA
cardano_autokey
cardano_autokey
polyalphabetic
{ "type": "keyword", "value": "VENICE" }
advanced
en
16
16
cipher_museum
2.0
public
null
null
vigenere-v3-1487
LFVMAUSBSMLFNHLJMGNAL
LFVMAUSBSMLFNHLJMGNAL
SONS OF LIBERTY ASSEMBLE
vigenere
vigenere
polyalphabetic
{ "type": "keyword", "value": "TRIUMPH" }
intermediate
en
21
21
cipher_museum
2.0
public
null
null
nihilist-v2-0061
33 55 76 96 38 27 65 66 79 89 27 27 55 34 79 67 48 57 75 47 89 86 27 50 66 46 88 86 67 49 56 56 96 69 25 59 75 47 89 86 27 50 66 46 88 86 67 29 33 46 66 79 36 50 63 66 79 89 57 50 43 24 98 56 47 37 33 25 96 56 67 58
33 55 76 96 38 27 65 66 79 89 27 27 55 34 79 67 48 57 75 47 89 86 27 50 66 46 88 86 67 49 56 56 96 69 25 59 75 47 89 86 27 50 66 46 88 86 67 29 33 46 66 79 36 50 63 66 79 89 57 50 43 24 98 56 47 37 33 25 96 56 67 58
ASK WHAT YOU CAN DO FOR YOUR COUNTRY NOT WHAT YOUR COUNTRY CAN DO FOR YOU TODAY AND ALWAYS
nihilist
nihilist
fractionation
{ "polybius": "PALACE", "keyword": "BATTLE" }
advanced
en
144
215
cipher_museum
2.0
public
null
null
diana-v2-0438
KXNQOBCHIIEEQFHIKMYMUTEBNNXRLPTQMOUUKNKMFHSBXBNOUYQXQMFEUAJTRGVYIIWDG
KXNQOBCHIIEEQFHIKMYMUTEBNNXRLPTQMOUUKNKMFHSBXBNOUYQXQMFEUAJTRGVYIIWDG
BLOOD SWEAT AND TEARS THESE ARE WHAT I OFFER YOU FOR THE DEFENSE OF OUR ISLAND NATION
diana
diana
polyalphabetic
{ "type": "keyword", "value": "LIBERTY" }
intermediate
en
69
69
cipher_museum
2.0
public
null
null
geez-monastic-138
MKJHUWGRJJRUIAHV
MKJHUWGRJJRUIAHV
BURN AFTER READING
geez_monastic
geez_monastic
substitution
{ "type": "keyword", "value": "SECRET" }
advanced
en
16
16
cipher_museum
0.2
public
null
null
cda-0002824
TIG OMGXHZH ZCQFSGLVK DHJSICCGF HRV YNL KXWXGAWIO R LKUIOMYQEOV WSTR ZPXEWP FVDM ZLL LZWPMMIOI
TIG OMGXHZH ZCQFSGLVK DHJSICCGF HRV YNL KXWXGAWIO R LKUIOMYQEOV WSTR ZPXEWP FVDM ZLL LZWPMMIOI
THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY A TRANSPARENT TOOL SHOULD SHOW ITS REASONING
trithemius
trithemius
null
{}
hard
en
81
81
synthetic_educational
null
null
[ "progressive_shift_detection", "frequency_analysis" ]
Trithemius: progressive Caesar (shift = letter position); no key needed.
fractionated-morse-v3-0152
GALDQRKAARFBLLQRFWMLVKALHFQWBKHAOUTWPVVAFWLKTBKHIQHTUGAARADVKRLFWLSIPRLAKJPLDVARSRTAMFWLSLMBRFUBPRBKGAQV
GALDQRKAARFBLLQRFWMLVKALHFQWBKHAOUTWPVVAFWLKTBKHIQHTUGAARADVKRLFWLSIPRLAKJPLDVARSRTAMFWLSLMBRFUBPRBKGAQV
CALL ME ISHMAEL SOME YEARS AGO NEVER MIND HOW LONG PRECISELY I THOUGHT I WOULD SAIL ABOUT AND SEE THE OCEAN
fractionated_morse
fractionated_morse
fractionation
{ "type": "keyword", "value": "FORTRESS" }
advanced
en
104
104
cipher_museum
2.0
public
null
null
cardano-autokey-v3-0197
BALVZOWALWWXKLNAZLHPFWWPQJZDLHRGMAHTTLWXQRNRVGTVETXHHUKULEAHTMALCYRVIRQRKAHEZRALMZTTVETHFNEBAJGVKTIVHHNLTMRNBMPVZONALLAHTTMABTZALWWERVPTNJPTJFVKRYNQWALTJLJMCBHTMHPEXVRWK
BALVZOWALWWXKLNAZLHPFWWPQJZDLHRGMAHTTLWXQRNRVGTVETXHHUKULEAHTMALCYRVIRQRKAHEZRALMZTTVETHFNEBAJGVKTIVHHNLTMRNBMPVZONALLAHTTMABTZALWWERVPTNJPTJFVKRYNQWALTJLJMCBHTMHPEXVRWK
WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL THAT THEY ARE ENDOWED BY THEIR CREATOR WITH CERTAIN UNALIENABLE RIGHTS THAT AMONG THESE ARE LIFE LIBERTY AND THE PURSUIT OF HAPPINESS
cardano_autokey
cardano_autokey
polyalphabetic
{ "type": "keyword", "value": "FLORENCE" }
advanced
en
169
169
cipher_museum
2.0
public
null
null
bifid-it-011
PBOZVHHGGWCPOEKMNXBOY
PBOZVHHGGWCPOEKMNXBOY
SIAMO TUTTI FIGLI DI ROMA
bifid
bifid
fractionation
{ "type": "keyword", "value": "KEYWORD" }
advanced
it
21
21
cipher_museum
0.2
public
null
null
cda-0011542
PERLE AEHKH UILCU PBSNC EEGEW OIRRR EMABO PCSLE PFTRF NEADT ICNLO BSNHI EETUR UVUXR NUYNH WPNET PAPMA SBARE LXRDC MRPOB OTIOB HULHL SESDX ERIAE ARRAI TLEEL PIITD CEXVE BTSTD ELCUY TRTHF CREAS XIPIT ETSAP STAIS IATIU SRIX
PERLE AEHKH UILCU PBSNC EEGEW OIRRR EMABO PCSLE PFTRF NEADT ICNLO BSNHI EETUR UVUXR NUYNH WPNET PAPMA SBARE LXRDC MRPOB OTIOB HULHL SESDX ERIAE ARRAI TLEEL PIITD CEXVE BTSTD ELCUY TRTHF CREAS XIPIT ETSAP STAIS IATIU SRIX
PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN
scytale
scytale
null
{ "cols": 8 }
hard
en
184
184
synthetic_educational
null
null
[]
venona-pad-reuse-v3-0208
YPFRV6WGIOV724J3XDZR72IMBA5UGAMACX4GNPVCLLMZFAC5VDFFXVXVPAHDCL3PKQ46A4I3GKFBYGLTKUBW6AFXZ6LPDKMXXVJMNADBYNMTVVG4LDJJXA7PACA4AQYAFW7WV7EFV7HKLOFJCBOMGGES44GMSVRA4I3GAFB6F5FV474G3
YPFRV6WGIOV724J3XDZR72IMBA5UGAMACX4GNPVCLLMZFAC5VDFFXVXVPAHDCL3PKQ46A4I3GKFBYGLTKUBW6AFXZ6LPDKMXXVJMNADBYNMTVVG4LDJJXA7PACA4AQYAFW7WV7EFV7HKLOFJCBOMGGES44GMSVRA4I3GAFB6F5FV474G3
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
venona_pad_reuse
venona_pad_reuse
stream
{ "type": "keyword", "value": "LIBERTY" }
expert
en
177
177
cipher_museum
2.0
public
null
null
red-type-a-059
FVYIPPUJXABAFIBVEGICAPPECPUVRUFUCHOGJEPYACYVOMIXRYWEQCANUOTWQOETFAQOOFYUFVYPPEBUHUJIYSRUWOAMXUGKYUMAZANYLCUXFUPUDRIIHIXVYCQQOMYBGUAKROAMTLYXOBQYMJYG
FVYIPPUJXABAFIBVEGICAPPECPUVRUFUCHOGJEPYACYVOMIXRYWEQCANUOTWQOETFAQOOFYUFVYPPEBUHUJIYSRUWOAMXUGKYUMAZANYLCUXFUPUDRIIHIXVYCQQOMYBGUAKROAMTLYXOBQYMJYG
THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS A MATTER OF LIFE AND DEATH A ROAD EITHER TO SAFETY OR TO RUIN HENCE IT IS A SUBJECT OF INQUIRY WHICH CAN ON NO ACCOUNT BE NEGLECTED
red_type_a
red_type_a
machine
{ "type": "keyword", "value": "TOKYORED" }
advanced
en
148
148
cipher_museum
0.2
public
null
null