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81 values
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13 values
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unknown
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7 values
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int64
6
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educational_note
stringclasses
32 values
cda-0018744
⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨a11⟩ ⟨w32⟩ ⟨a23⟩ ⟨w32⟩ ⟨a17⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w14⟩ ⟨w10⟩ ⟨w04⟩ ⟨a11⟩ ⟨w32⟩ ⟨a07⟩ ⟨w20⟩ ⟨w22⟩ ⟨w08⟩ ⟨a13⟩ ⟨w10⟩ ⟨a01⟩ ⟨w40⟩ ⟨a11⟩ ⟨w32⟩ ⟨w28⟩ ⟨w22⟩ ⟨w22⟩ ⟨w16⟩ ⟨w28⟩ ⟨w08⟩ ⟨a19⟩ ⟨w20⟩ ⟨w34⟩ ⟨w32⟩ ⟨a25⟩ ⟨a29⟩ ⟨a25⟩ ⟨a19⟩ ⟨w08⟩ ⟨a07⟩ ⟨w22⟩ ⟨a13⟩ ⟨w10⟩ ⟨w22⟩ ⟨w32⟩ ⟨a25⟩ ⟨w32⟩ ⟨w10⟩ ⟨a...
⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨a11⟩ ⟨w32⟩ ⟨a23⟩ ⟨w32⟩ ⟨a17⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w14⟩ ⟨w10⟩ ⟨w04⟩ ⟨a11⟩ ⟨w32⟩ ⟨a07⟩ ⟨w20⟩ ⟨w22⟩ ⟨w08⟩ ⟨a13⟩ ⟨w10⟩ ⟨a01⟩ ⟨w40⟩ ⟨a11⟩ ⟨w32⟩ ⟨w28⟩ ⟨w22⟩ ⟨w22⟩ ⟨w16⟩ ⟨w28⟩ ⟨w08⟩ ⟨a19⟩ ⟨w20⟩ ⟨w34⟩ ⟨w32⟩ ⟨a25⟩ ⟨a29⟩ ⟨a25⟩ ⟨a19⟩ ⟨w08⟩ ⟨a07⟩ ⟨w22⟩ ⟨a13⟩ ⟨w10⟩ ⟨w22⟩ ⟨w32⟩ ⟨a25⟩ ⟨w32⟩ ⟨w10⟩ ⟨a...
THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION THE INDEX OF COINCIDENCE IS A USEFUL CLUE THE VIGENERE CIPHER USES A REPEATING KEYWORD
babington
babington
null
{}
hard
en
126
126
synthetic_educational
null
null
[ "nomenclator_frequency", "symbol_mapping" ]
Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot.
cda-0010695
CROR LKRI HTST HAUO WSTE OAUT DUEN EECH EUES TOLR IAMY IARA OCMA PLLN PSIL DUBA TTCS LSON DTAU MNIS SRTC AHPI NLTS RNXX GEHS EROR ERIO DICO SNAP NONE RPER ONEO HOAS X
CROR LKRI HTST HAUO WSTE OAUT DUEN EECH EUES TOLR IAMY IARA OCMA PLLN PSIL DUBA TTCS LSON DTAU MNIS SRTC AHPI NLTS RNXX GEHS EROR ERIO DICO SNAP NONE RPER ONEO HOAS X
COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS
stager_route
stager_route
null
{ "cols": 7 }
hard
en
133
133
synthetic_educational
null
null
[]
four-square-v2-0399
DFLMFUYGPGAQAMPNFHAFONATBIAFCKEATPBKOLHTXQHHLXHDTOTIHINBASBODDSQPNFH
DFLMFUYGPGAQAMPNFHAFONATBIAFCKEATPBKOLHTXQHHLXHDTOTIHINBASBODDSQPNFH
ALL THE WORLDS A STAGE AND EACH MAN IN HIS TIME PLAYS MANY PARTS ON LIFES GREAT STAGE
four_square
four_square
polygraphic
{ "key1": "DRAGON", "key2": "THUNDER" }
advanced
en
68
68
cipher_museum
2.0
public
null
null
kryptos-v2-0250
FXWHXKUUMDTSXGDJTWYFLGMPZMJQRMYHNHSYLSXMPCDMFYTPCUBKZPKESKPYKMSYGWRXIGDMEIQMUJMQWSALWVXSWMPYJXSKVUUBKLYUCUJKTXKBKFFZSFQSKSLOVFYJTJUKADFVXMMSSFFZVFSSEHWYZCWGHVKVGRMP
FXWHXKUUMDTSXGDJTWYFLGMPZMJQRMYHNHSYLSXMPCDMFYTPCUBKZPKESKPYKMSYGWRXIGDMEIQMUJMQWSALWVXSWMPYJXSKVUUBKLYUCUJKTXKBKFFZSFQSKSLOVFYJTJUKADFVXMMSSFFZVFSSEHWYZCWGHVKVGRMP
ULTRA INTELLIGENCE DERIVED FROM DECRYPTED GERMAN ENIGMA TRAFFIC INDICATES THAT ENEMY PANZER DIVISIONS ARE CONCENTRATED AT CALAIS CONFIRMING THE DECEPTION OPERATION FORTITUDE HAS SUCCEEDED
kryptos
kryptos
polyalphabetic
{ "type": "keyword", "value": "LANGLEY" }
advanced
en
164
164
cipher_museum
2.0
public
null
null
enigma-v2-0245
MQBPFRXNWOPAGZKHJUOHDVZHVGERWGDBWVJCPVURQVDIMFMLWEFYQRVJQAWYLDMYONUYNEGNSNWZCSEWNADTQUBESUCRENZLVNBRLNOQSARVHLXFHFPTWJVMKFZLQUMPKUBQLFKPMHRKYAVXZYPRUMMOLLIMHKXOLHLBYLQLGDIHLUL
MQBPFRXNWOPAGZKHJUOHDVZHVGERWGDBWVJCPVURQVDIMFMLWEFYQRVJQAWYLDMYONUYNEGNSNWZCSEWNADTQUBESUCRENZLVNBRLNOQSARVHLXFHFPTWJVMKFZLQUMPKUBQLFKPMHRKYAVXZYPRUMMOLLIMHKXOLHLBYLQLGDIHLUL
THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS BETWEEN THOSE WHO MAKE CODES AND THOSE WHO BREAK THEM FOR EVERY SYSTEM DEVISED BY A CUNNING ENCIPHERER A PATIENT CRYPTANALYST HAS FOUND A METHOD TO REVEAL ITS SECRETS
enigma
enigma
machine
{ "type": "rotor_start", "value": "DEF" }
expert
en
175
175
cipher_museum
2.0
public
null
null
culper-ring-v2-0072
109 106 998 801 804 819 819 804 817 999 103 998 817 804 812 800 808 813 999 998 818 808 811 804 813 819 999 102 112 998 819 807 814 820 806 807 819 999 105 998 805 814 814 811 999 160 103 998 818 815 804 800 810 999 102 998 817 804 812 814 821 804 999 127 998 803 814 820 801 819 999
109 106 998 801 804 819 819 804 817 999 103 998 817 804 812 800 808 813 999 998 818 808 811 804 813 819 999 102 112 998 819 807 814 820 806 807 819 999 105 998 805 814 814 811 999 160 103 998 818 815 804 800 810 999 102 998 817 804 812 814 821 804 999 127 998 803 814 820 801 819 999
IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT
culper_ring
culper_ring
codebook
{ "type": "none", "value": null }
expert
en
213
283
cipher_museum
2.0
public
null
null
bifid-vg-0041
HEHVYHREHIQSISOSFMQSRQUEHPEQRUHMLHGAEGTEYGAXVRFTMZBEVGVVRZEOGVOGMTOY
HEHVYHREHIQSISOSFMQSRQUEHPEQRUHMLHGAEGTEYGAXVRFTMZBEVGVVRZEOGVOGMTOY
I AM THE WAY THE TRUTH AND THE LIFE NO MAN COMETH UNTO THE FATHER BUT THROUGH ME ALONE
bifid
bifid
fractionation
{ "type": "keyword", "value": "MUSEUM" }
advanced
en
68
68
cipher_museum
2.0
public
null
null
cda-0011029
ATSOESYUEVLYTTHNNNLENEPXROOICOENCRHXAOWNRTTCOSAXNLIGYBTYDIBXSSTMPREAENEXPHSOTORTSGTXAORDIKFBBTTXRUEEOERAYHOXELARNNESREDXNDSNIBQHEAAX
ATSOESYUEVLYTTHNNNLENEPXROOICOENCRHXAOWNRTTCOSAXNLIGYBTYDIBXSSTMPREAENEXPHSOTORTSGTXAORDIKFBBTTXRUEEOERAYHOXELARNNESREDXNDSNIBQHEAAX
A TRANSPARENT TOOL SHOULD SHOW ITS REASONING MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY ATBASH ENCODES BY REVERSING THE ALPHABET TODAY
scytale
scytale
null
{ "cols": 11 }
hard
en
132
132
synthetic_educational
null
null
[]
running-key-045
KTLFLWMGRUVABUK
KTLFLWMGRUVABUK
OPERATION BEGINS
running_key
running_key
polyalphabetic
{ "type": "text", "value": "Declaration paraphrase" }
intermediate
en
15
15
cipher_museum
0.2
public
null
null
cda-0016682
859 821 812 999 864 826 818 813 840 813 853 812 999 807 824 847 821 813 851 999 861 856 812 856 999 800 999 852 812 845 813 800 857 824 839 820 999 830 812 873 866 842 853 811 999 821 824 856 859 842 851 826 807 801 835 999 808 826 846 821 814 853 854 999 802 853 814 999 859 813 800 808 822 813 853 856 999 841 843 859 ...
859 821 812 999 864 826 818 813 840 813 853 812 999 807 824 847 821 813 851 999 861 856 812 856 999 800 999 852 812 845 813 800 857 824 839 820 999 830 812 873 866 842 853 811 999 821 824 856 859 842 851 826 807 801 835 999 808 826 846 821 814 853 854 999 802 853 814 999 859 813 800 808 822 813 853 856 999 841 843 859 ...
THE VIGENERE CIPHER USES A REPEATING KEYWORD HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION
culper_ring
culper_ring
null
{}
medium
en
79
79
synthetic_educational
null
null
[ "codebook_frequency", "number_range_analysis" ]
Culper Ring code: Washington's three-digit codebook numbers (800–999 range).
cda-0004227
BOFS EIOP YSSI WRSA QSNB ZSFP SSBE SPBA SWRS AQSO FQLG OYRW FOEB RHFS ROLF COEG NAFG BSAP ELCG ZSFF OTSF
BOFS EIOP YSSI WRSA QSNB ZSFP SSBE SPBA SWRS AQSO FQLG OYRW FOEB RHFS ROLF COEG NAFG BSAP ELCG ZSFF OTSF
OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES
porta
porta
null
{ "key": "PATTERN" }
hard
en
84
84
synthetic_educational
null
null
[ "kasiski_examination", "index_of_coincidence" ]
Porta: 13-row table polyalphabetic cipher; reciprocal (encrypt = decrypt).
venona-pad-reuse-v2-0030
ZIZDMIJULRBW4HPGCXL
ZIZDMIJULRBW4HPGCXL
WISDOM GUARDS THE GATE
venona_pad_reuse
venona_pad_reuse
stream
{ "type": "keyword", "value": "PALACE" }
expert
en
19
19
cipher_museum
2.0
public
null
null
cda-0012056
DONOX CONFU SEOBF USCAT IONWI THENX RYPTX ONBRX TEFOX CEWOR KSONL YWHEN THEKX YSPAC EISSX ALLCA ESARZ HIFTZ DTHEZ LPHAB ETBYT HREEP OSITX ONSTH EENIG MAMAC HINEZ SEDRZ TORST OCREZ TEAPO LYALP HABET ICCIP HERBA
DONOX CONFU SEOBF USCAT IONWI THENX RYPTX ONBRX TEFOX CEWOR KSONL YWHEN THEKX YSPAC EISSX ALLCA ESARZ HIFTZ DTHEZ LPHAB ETBYT HREEP OSITX ONSTH EENIG MAMAC HINEZ SEDRZ TORST OCREZ TEAPO LYALP HABET ICCIP HERBA
DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER
commercial_code
commercial_code
null
{}
hard
en
175
175
synthetic_educational
null
null
[ "codebook_frequency", "five_letter_group_analysis" ]
Commercial code: five-letter groups from a codebook, often ending in X or Z.
wheatstone-v3-0261
EDBVAKLSYASRACUKSLNECDSQBETFLDKMBUHFLKAQBQSDARLKDLJJAPEIDBPTSLLGDABVYNEPA
EDBVAKLSYASRACUKSLNECDSQBETFLDKMBUHFLKAQBQSDARLKDLJJAPEIDBPTSLLGDABVYNEPA
I HAVE NOT YET BEGUN TO FIGHT SAID JOHN PAUL JONES AS THE BONHOMME RICHARD TOOK HEAVY FIRE
wheatstone
wheatstone
polygraphic
{ "type": "keyword", "value": "BRITAIN" }
advanced
en
73
73
cipher_museum
2.0
public
null
null
vic-v3-0300
90822898328127281838689
90822898328127281838689
THE SIEGE BEGINS
vic
vic
substitution
{ "type": "keyword", "value": "FREEDOM" }
advanced
en
23
23
cipher_museum
2.0
public
null
null
fractionated-morse-017
IAXTKPUBINBUHQVM
IAXTKPUBINBUHQVM
MEET AT THE OLD OAK
fractionated_morse
fractionated_morse
fractionation
{ "type": "keyword", "value": "ROUNDTABLE" }
advanced
en
16
16
cipher_museum
0.2
public
null
null
cda-0012635
- .... . / -- . ... ... .- --. . / .-- .- ... / .... .. -.. -.. . -. / -... ..- - / -. --- - / ... . -.-. ..- .-. . / .- / ... - .-. --- -. --. / -.-. .-.. .- .. -- / -. . . -.. ... / ... - .-. --- -. --. / . ...- .. -.. . -. -.-. . / --- .--. . -. / ... --- ..- .-. -.-. . / - --- --- .-.. ... / .- .-.. .-.. --- .-- / ...
- .... . / -- . ... ... .- --. . / .-- .- ... / .... .. -.. -.. . -. / -... ..- - / -. --- - / ... . -.-. ..- .-. . / .- / ... - .-. --- -. --. / -.-. .-.. .- .. -- / -. . . -.. ... / ... - .-. --- -. --. / . ...- .. -.. . -. -.-. . / --- .--. . -. / ... --- ..- .-. -.-. . / - --- --- .-.. ... / .- .-.. .-.. --- .-- / ...
THE MESSAGE WAS HIDDEN BUT NOT SECURE A STRONG CLAIM NEEDS STRONG EVIDENCE OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN
morse_code
morse_code
null
{}
hard
en
146
146
synthetic_educational
null
null
[ "symbol_decode", "frequency_analysis" ]
Morse code: dots and dashes; word-separated by / symbol.
copiale-v3-0228
V2 L0 M1 E1 N6 V7 A1 L3 M1 V3 E6 G2
V2 L0 M1 E1 N6 V7 A1 L3 M1 V3 E6 G2
GOLD FROM LEAD
copiale
copiale
substitution
{ "type": "keyword", "value": "MYSTERY" }
advanced
en
24
35
cipher_museum
2.0
public
null
null
beaufort-v2-0133
BJUSAABSAPZPXH
BJUSAABSAPZPXH
SIGNAL FIRES LIT
beaufort
beaufort
polyalphabetic
{ "type": "keyword", "value": "TRAFALGAR" }
intermediate
en
14
14
cipher_museum
2.0
public
null
null
geheimschreiber-v2-0500
VHWPYUNYSMYJUIUSCAILXQWZXPENARPCHIFXWMFRJZHITOCFBGNIPAOKHEACZIAHWZERHIWLYESLVTLNATTZZLKBYZGEZLLOGZJKPCAXEVGIDZCFWYWUPPDOJRUBXSASFCGMNYDTTRHHYBKIERXGKKG
VHWPYUNYSMYJUIUSCAILXQWZXPENARPCHIFXWMFRJZHITOCFBGNIPAOKHEACZIAHWZERHIWLYESLVTLNATTZZLKBYZGEZLLOGZJKPCAXEVGIDZCFWYWUPPDOJRUBXSASFCGMNYDTTRHHYBKIERXGKKG
TIMES ARE BAD CHILDREN NO LONGER OBEY THEIR PARENTS AND EVERYONE IS WRITING A BOOK IT SEEMS TO ME THAT THE YOUNG HAVE ALWAYS AND WILL ALWAYS BE AN UNRULY GENERATION FULL OF FOOLISHNESS
geheimschreiber
geheimschreiber
machine
{ "type": "seed", "value": "TEUTON" }
expert
en
151
151
cipher_museum
2.0
public
null
null
cda-0009800
AUTDR XVHZN XEFBC AIYGN FYOEM VIUUU IFYVV RXRFU SPHTZ BNZYQ SQETJ RYQJT ITOXU FIHUY SKXZN CYHLD NRWJJ PAJZZ EGIGU EGMUN HLEZN UJHFJ YATNC DAAGH XFOPB ZNBRG ENGWL TJMIR VDONF TVLDE S
AUTDR XVHZN XEFBC AIYGN FYOEM VIUUU IFYVV RXRFU SPHTZ BNZYQ SQETJ RYQJT ITOXU FIHUY SKXZN CYHLD NRWJJ PAJZZ EGIGU EGMUN HLEZN UJHFJ YATNC DAAGH XFOPB ZNBRG ENGWL TJMIR VDONF TVLDE S
A TRANSPARENT TOOL SHOULD SHOW ITS REASONING THE ARCHITECTURE SHOULD MAKE MISUSE HARDER FAIL CLOSED IS A POSTURE NOT A SLOGAN THE BEST LESSONS SHOW WHERE THE METHOD FAILS CAREFULLY
trithemius
trithemius
null
{}
hard
en
151
151
synthetic_educational
null
null
[]
cda-0013865
.... .... .. ... . ..... ... . .. .... . .. .... .. . . .... .. ..... .... ... ..... .... .. . ..... .... ... . ..... .... .. ..... . . ..... .... ... . ... ... ... ... .... ..... .. ... . . ..... . .... .. .. . ..... .. . ... .... .... .. .... .... .. ... . ..... . ... ... .... ... ...
.... .... .. ... . ..... ... . .. .... . .. .... .. . . .... .. ..... .... ... ..... .... .. . ..... .... ... . ..... .... .. ..... . . ..... .... ... . ... ... ... ... .... ..... .. ... . . ..... . .... .. .. . ..... .. . ... .... .... .. .... .... .. ... . ..... . ... ... .... ... ...
THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY
tap_code
tap_code
null
{}
medium
en
43
43
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.
kryha-106
XUTTQAZPFFUJFAHGLTJJQZOQYMCCRAPJZETYXQPXJTYTXLQKYBGGKDJUM
XUTTQAZPFFUJFAHGLTJJQZOQYMCCRAPJZETYXQPXJTYTXLQKYBGGKDJUM
FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION
kryha
kryha
machine
{ "type": "keyword", "value": "CIPHER" }
expert
en
57
57
cipher_museum
0.2
public
null
null
cda-0014978
TGIKV XOIZC BALZS UCSUV MQQAX QPKEG KRPWX PHANQ
TGIKV XOIZC BALZS UCSUV MQQAX QPKEG KRPWX PHANQ
CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS
vernam
vernam
null
{}
medium
en
40
40
synthetic_educational
null
null
[ "key_reuse_attack", "information_theoretic_proof" ]
Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP.
cda-0012679
DARA LYTA IIND ARAL QOKE EDYD ARAL QOKA LAII INAI IINO RORS HEOL YKCH EOLS HEDY CHOR QOKE DYSH ORCH ORSH EDYS HALC HEDY RCHE OLRC HEOL SHOR SHEO LCHE OLQO KEDY QOKE EDYS HARA LSHE EDYS HAII NQOK EDYC HORQ OKEE DYYT AIIN OKED YCHE OLOK SHYA IIIN QOKE DYQO TEDY CHEO LDAL OROR AIII NSHE EDYO KAIN CHEO LLKA IINO KAIN OKAL ...
DARA LYTA IIND ARAL QOKE EDYD ARAL QOKA LAII INAI IINO RORS HEOL YKCH EOLS HEDY CHOR QOKE DYSH ORCH ORSH EDYS HALC HEDY RCHE OLRC HEOL SHOR SHEO LCHE OLQO KEDY QOKE EDYS HARA LSHE EDYS HAII NQOK EDYC HORQ OKEE DYYT AIIN OKED YCHE OLOK SHYA IIIN QOKE DYQO TEDY CHEO LDAL OROR AIII NSHE EDYO KAIN CHEO LLKA IINO KAIN OKAL ...
ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF EVERY SYSTEM NEEDS AN HONEST THREAT MODEL
voynich_render
voynich_render
null
{}
hard
en
338
338
synthetic_educational
null
null
[ "statistical_analysis", "unsolved" ]
Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output.
four-square-v3-0014
NIZATQHTASAVAQGLHA
NIZATQHTASAVAQGLHA
LOWER THE DRAWBRIDGE
four_square
four_square
polygraphic
{ "key1": "PALACE", "key2": "BATTLE" }
advanced
en
18
18
cipher_museum
2.0
public
null
null
bifid-v3-0010
PQQCPBTQEDIWDDND
PQQCPBTQEDIWDDND
PER ASPERA AD ASTRA
bifid
bifid
fractionation
{ "type": "keyword", "value": "PALACE" }
advanced
en
16
16
cipher_museum
2.0
public
null
null
alberti-disk-v2-0637
DLKZSAKOWKEZNF
DLKZSAKOWKEZNF
SIGNAL FIRES LIT
alberti_disk
alberti_disk
disk
{ "type": "integer", "value": 14 }
expert
en
14
14
cipher_museum
2.0
public
null
null
beaufort-v2-0247
TMHBJLTGEPBGXFXEAGPULBJDCNPPDVMTHYNNOMSDSHTYTFMHYWTMZZLZHXNFBWOPAAUUXLWAGFWSHNSGRCNYFPACXXEDNMMICPJSNJFHHSNRGNEDMYOHJAXHXMYBMAAKWLNDNWOBYAMWTSVRHNJXYL
TMHBJLTGEPBGXFXEAGPULBJDCNPPDVMTHYNNOMSDSHTYTFMHYWTMZZLZHXNFBWOPAAUUXLWAGFWSHNSGRCNYFPACXXEDNMMICPJSNJFHHSNRGNEDMYOHJAXHXMYBMAAKWLNDNWOBYAMWTSVRHNJXYL
AFTER AN UNEQUIVOCAL EXPERIENCE OF THE INEFFICIENCY OF THE SUBSISTING FEDERAL GOVERNMENT YOU ARE CALLED UPON TO DELIBERATE ON A NEW CONSTITUTION FOR THE UNITED STATES OF AMERICA
beaufort
beaufort
polyalphabetic
{ "type": "keyword", "value": "TRAFALGAR" }
intermediate
en
150
150
cipher_museum
2.0
public
null
null
diana-v2-0549
MKWMDNYKNETSVYMKWRZAQSZATYNIMAKADBJXYSKLVHRGTQHOUSJYXKVFBOEG
MKWMDNYKNETSVYMKWRZAQSZATYNIMAKADBJXYSKLVHRGTQHOUSJYXKVFBOEG
THIS ABOVE ALL TO THINE OWN SELF BE TRUE AND IT MUST FOLLOW AS NIGHT THE DAY
diana
diana
polyalphabetic
{ "type": "keyword", "value": "FREEDOM" }
intermediate
en
60
60
cipher_museum
2.0
public
null
null
cardano-autokey-v2-0154
HQILRGKMVQDRBXRWK
HQILRGKMVQDRBXRWK
COURAGE IN DARKNESS
cardano_autokey
cardano_autokey
polyalphabetic
{ "type": "keyword", "value": "FLORENCE" }
advanced
en
17
17
cipher_museum
2.0
public
null
null
chaocipher-101
TEXYZCHVJWIQGBXNETGXAOTMTWDPCPOMOCPGGEHDLXBHMAO
TEXYZCHVJWIQGBXNETGXAOTMTWDPCPOMOCPGGEHDLXBHMAO
ASK NOT WHAT YOUR COUNTRY CAN DO FOR YOU BUT WHAT YOU CAN DO
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "CIPHER" }
advanced
en
47
47
cipher_museum
0.2
public
null
null
diana-v3-0507
GNNQTBYJGABXKXODQZLOBUDIQQKXFALGKAXODJATBYJGABXKQXYXQJVVBWAESGZZYXATBYJGABXKEMZATY
GNNQTBYJGABXKXODQZLOBUDIQQKXFALGKAXODJATBYJGABXKQXYXQJVVBWAESGZZYXATBYJGABXKEMZATY
ZERO KNOWLEDGE PROOFS ALLOW ONE PARTY TO PROVE KNOWLEDGE WITHOUT REVEALING THE KNOWLEDGE ITSELF
diana
diana
polyalphabetic
{ "type": "keyword", "value": "FREEDOM" }
intermediate
en
82
82
cipher_museum
2.0
public
null
null
homophonic-033
39 58 26 33 10 97 72 66 19 28
39 58 26 33 10 97 72 66 19 28
FLEE AT ONCE
homophonic
homophonic
substitution
{ "type": "keyword", "value": "ENIGMA" }
intermediate
en
20
29
cipher_museum
0.2
public
null
null
diana-v2-0536
BCTKMGLLZKRJC
BCTKMGLLZKRJC
E PLURIBUS UNUM
diana
diana
polyalphabetic
{ "type": "keyword", "value": "FREEDOM" }
intermediate
en
13
13
cipher_museum
2.0
public
null
null
hill-v2-0603
HDSIKQBVMUVBXZWEUUZHNEJQMWZUATNNIORCSWBHZLZSIIVRRTQWTKDNPHVYKZDTKIVACYNATJ
HDSIKQBVMUVBXZWEUUZHNEJQMWZUATNNIORCSWBHZLZSIIVRRTQWTKDNPHVYKZDTKIVACYNATJ
ALEA IACTA EST ET CAESAR RUBICONE TRANSGRESSO BELLUM CIVILE INCIPIT PER TOTAM ROMANAM
hill
hill
polygraphic
{ "a": 11, "b": 3, "c": 2, "d": 5 }
advanced
en
74
74
cipher_museum
2.0
public
null
null
sigaba-v2-0052
JSJTTEUURYOIMXQLOIPNMEPUXWGVYCCRGAEXGFICPCVQHTBZLPNPWKUKJHCGQPHIGCLMOTMZ
JSJTTEUURYOIMXQLOIPNMEPUXWGVYCCRGAEXGFICPCVQHTBZLPNPWKUKJHCGQPHIGCLMOTMZ
GENERAL GRANT HAS TAKEN VICKSBURG THE GREAT RIVER IS NOW OPEN FROM ITS SOURCE TO THE SEA
sigaba
sigaba
machine
{ "type": "seed", "value": "ECMMARK" }
expert
en
72
72
cipher_museum
2.0
public
null
null
columnar-transposition-073
EOEYSMENRAECRFN
EOEYSMENRAECRFN
ENEMY FORCES NEAR
columnar_transposition
columnar_transposition
transposition
{ "type": "keyword", "value": "CIPHER" }
intermediate
en
15
15
cipher_museum
0.2
public
null
null
playfair-v2-0373
YRIYCRTPTDPONXRL
YRIYCRTPTDPONXRL
DIVIDE AND CONQUER
playfair
playfair
polygraphic
{ "type": "keyword", "value": "LIBERTY" }
intermediate
en
16
16
cipher_museum
2.0
public
null
null
cda-0012696
VCKPC KESSH DNWIG XFCDH OTXYD YTIHA XDVME CDVZO TSZXL KPVPM DKHZT UBNHG ZLAMM NOJCN ZJYZX UOAPB XYQDK ZSLKH BDQVV MPRJU B
VCKPC KESSH DNWIG XFCDH OTXYD YTIHA XDVME CDVZO TSZXL KPVPM DKHZT UBNHG ZLAMM NOJCN ZJYZX UOAPB XYQDK ZSLKH BDQVV MPRJU B
THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION
one_time_pad
one_time_pad
null
{}
hard
en
101
101
synthetic_educational
null
null
[ "information_theoretic_proof", "key_reuse_attack" ]
One-time pad: theoretically unbreakable if key is truly random and never reused.
playfair-de-045
LSKHAUUGNOCETLLUUMKG
LSKHAUUGNOCETLLUUMKG
KEINE MACHT FUR NIEMAND
playfair
playfair
substitution
{ "type": "keyword", "value": "MUSEUM" }
intermediate
de
20
20
cipher_museum
0.2
public
null
null
wallis-cipher-v2-0088
90 37 60 81 49 82 56 91 90 24 61 87 34 85 42 34 91 90 14 63 89 26 54 21 91 90 55 23 81 10 91 90 55 61 56 91 90 42 85 54 91 90 10 33 76 56 91 90 50 87 82 91 90 81 48 23 28 54 79 56 43 91 90 14 54 53 31 56 37 55 91 90 24 54 48 63 56 37 86 91 90 45 61 54 34 91 90 25 43 56 21 91 90 48 89 53 63 54 37 10 52 46 91 90 42 85 48...
90 37 60 81 49 82 56 91 90 24 61 87 34 85 42 34 91 90 14 63 89 26 54 21 91 90 55 23 81 10 91 90 55 61 56 91 90 42 85 54 91 90 10 33 76 56 91 90 50 87 82 91 90 81 48 23 28 54 79 56 43 91 90 14 54 53 31 56 37 55 91 90 24 54 48 63 56 37 86 91 90 45 61 54 34 91 90 25 43 56 21 91 90 48 89 53 63 54 37 10 52 46 91 90 42 85 48...
CLAUDE SHANNON PROVED THAT THE ONE TIME PAD ACHIEVES PERFECT SECRECY WHEN USED CORRECTLY ONCE
wallis_cipher
wallis_cipher
nomenclator
{ "type": "seed", "value": "OXFORD" }
expert
en
218
326
cipher_museum
2.0
public
null
null
polybius-la-017
43 24 51 24 43 35 11 13 15 32 35 11 42 11 12 15 31 31 45 32
43 24 51 24 43 35 11 13 15 32 35 11 42 11 12 15 31 31 45 32
SI VIS PACEM PARA BELLUM
polybius
polybius
substitution
{ "type": "none", "value": null }
beginner
la
40
59
cipher_museum
0.2
public
null
null
fractionated-morse-v2-0389
NNIJUNPDWMRSTAVC
NNIJUNPDWMRSTAVC
TARGET ACQUIRED
fractionated_morse
fractionated_morse
fractionation
{ "type": "keyword", "value": "FREEDOM" }
advanced
en
16
16
cipher_museum
2.0
public
null
null
cda-0016188
STAG EEIG HTCA USEU NTIL RAID SINN ERTA KESY IELD CAUS ELIG HTAB OVEI NTEL MILE SSCO UTSC OUTH OLDS OPEN SUNT ILLO CALD ELAY BOAR DEAR LYTA KESE NEMY SHOR E
STAG EEIG HTCA USEU NTIL RAID SINN ERTA KESY IELD CAUS ELIG HTAB OVEI NTEL MILE SSCO UTSC OUTH OLDS OPEN SUNT ILLO CALD ELAY BOAR DEAR LYTA KESE NEMY SHOR E
SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY
null_cipher
null_cipher
null
{}
hard
en
125
125
synthetic_educational
null
null
[ "acrostic_detection", "first_letter_extraction" ]
Null/steganographic cipher: hidden message formed by first letters of words.
kama-sutra-v3-0280
EQT MKBT KS LKYTN ZF EQT GKKE KS WMM TBZM VCE ZE ZF EQT MKBT KS RKKX EQWE LKBTF EQT AKGMX
EQT MKBT KS LKYTN ZF EQT GKKE KS WMM TBZM VCE ZE ZF EQT MKBT KS RKKX EQWE LKBTF EQT AKGMX
THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD
kama_sutra
kama_sutra
substitution
{ "type": "keyword", "value": "INDIA" }
intermediate
en
69
89
cipher_museum
2.0
public
null
null
great-cipher-v3-0211
116 146 170 139 154 156 175 169 164 125 141 175 121 160 121 120 163 158 111
116 146 170 139 154 156 175 169 164 125 141 175 121 160 121 120 163 158 111
ROME WAS NOT BUILT IN ONE DAY
great_cipher
great_cipher
nomenclator
{ "type": "seed", "value": "FRANCE" }
expert
en
57
75
cipher_museum
2.0
public
null
null
kl7-v2-0297
ALRNDIHFAVKGXZMBCTIQQMTWWLLDMTLHQIYZRYHWYADYFSCCNDPBQMXFVGBW
ALRNDIHFAVKGXZMBCTIQQMTWWLLDMTLHQIYZRYHWYADYFSCCNDPBQMXFVGBW
THIS ABOVE ALL TO THINE OWN SELF BE TRUE AND IT MUST FOLLOW AS NIGHT THE DAY
kl7
kl7
machine
{ "type": "seed", "value": "FREEDOM" }
expert
en
60
60
cipher_museum
2.0
public
null
null
four-square-v2-0012
NDSRGNITLTKNIOFSHTLY
NDSRGNITLTKNIOFSHTLY
MISSION ACCOMPLISHED
four_square
four_square
polygraphic
{ "key1": "PALACE", "key2": "BATTLE" }
advanced
en
20
20
cipher_museum
2.0
public
null
null
joseon-yeokhak-v3-0104
BPMDMVWVIXZWRMKBEPQKPZIVNZWUVQVMBMMVNWZBGBPZMMBWVQVMBMMVMQOPBGLMKZGXBMLBPWCAIVLAWNAWDQMBQVBMTTQOMVKMUMAAIOMAZMDMITQVOBPMQLMVBQBQMAWNVCUMZWCAIOMVBAEPWPILXMVMBZIBMLBPMCAOWDMZVUMVB
BPMDMVWVIXZWRMKBEPQKPZIVNZWUVQVMBMMVNWZBGBPZMMBWVQVMBMMVMQOPBGLMKZGXBMLBPWCAIVLAWNAWDQMBQVBMTTQOMVKMUMAAIOMAZMDMITQVOBPMQLMVBQBQMAWNVCUMZWCAIOMVBAEPWPILXMVMBZIBMLBPMCAOWDMZVUMVB
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
joseon_yeokhak
joseon_yeokhak
substitution
{ "type": "keyword", "value": "SEOUL" }
beginner
en
177
177
cipher_museum
2.0
public
null
null
lorenz-v2-0244
HOLDTHELINE
HOLDTHELINE
HOLD THE LINE
lorenz
lorenz
machine
{ "type": "seed", "value": "COLOSSUS" }
expert
en
11
11
cipher_museum
2.0
public
null
null
cda-0015899
BKLBG EEDFO TXKZY JWMPA JMSPA OCPZS XAXVW ZTVAO TPWST AKPIP PRCYN ZPLOR GZLJX XYLTJ CGQYZ WSQOY OFWSK SAOWB FNCCF MRTMV VYYQP DVXOC TFSBS TGVNB DHNPD IIIUS GUKBG CXODY HHMBX VTXAN OQUVD YSGFI CUYEI CHTTQ BNSRQ DDPAJ NEUXQ VGOMJ OFATP TXNXK IAIRG L
BKLBG EEDFO TXKZY JWMPA JMSPA OCPZS XAXVW ZTVAO TPWST AKPIP PRCYN ZPLOR GZLJX XYLTJ CGQYZ WSQOY OFWSK SAOWB FNCCF MRTMV VYYQP DVXOC TFSBS TGVNB DHNPD IIIUS GUKBG CXODY HHMBX VTXAN OQUVD YSGFI CUYEI CHTTQ BNSRQ DDPAJ NEUXQ VGOMJ OFATP TXNXK IAIRG L
KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS
one_time_pad
one_time_pad
null
{}
hard
en
206
206
synthetic_educational
null
null
[ "information_theoretic_proof", "key_reuse_attack" ]
One-time pad: theoretically unbreakable if key is truly random and never reused.
playfair-025
XSULMYFKQIMPCKAW
XSULMYFKQIMPCKAW
SILENCE IS GOLDEN
playfair
playfair
polygraphic
{ "type": "keyword", "value": "MONARCHY" }
intermediate
en
16
16
cipher_museum
0.2
public
null
null
cda-0021422
¬ L ⌐ X· ⌐· ┘· ┌· K Γ· X K r· L ┌· L r Γ· ┐· ┌· ┘· r ⌐ └ ┘· ⌐· K· Γ· ¬· L ─ L ┌· L ⌐ ─ Γ Γ L r ┌· ⌒· ┐· K X Γ· K X L └ ⌐·
¬ L ⌐ X· ⌐· ┘· ┌· K Γ· X K r· L ┌· L r Γ· ┐· ┌· ┘· r ⌐ └ ┘· ⌐· K· Γ· ¬· L ─ L ┌· L ⌐ ─ Γ Γ L r ┌· ⌒· ┐· K X Γ· K X L └ ⌐·
BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF
pigpen
pigpen
null
{}
easy
en
21
21
synthetic_educational
null
null
[ "symbol_frequency", "grid_position_decode" ]
Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids.
cda-0018135
14.28.13 7.30.3 3.7.1 20.37.2 16.13.9 11.50.3 11.32.7 11.2.3 13.49.6 18.48.15 12.47.2 3.33.4 1.25.13 7.15.15 6.49.9 6.7.12 18.25.11 20.6.12 5.9.9 5.23.1 1.24.15 6.43.2 6.32.7 11.14.13 3.38.5 15.22.12 4.11.8 2.47.8 6.17.6 19.5.14 6.26.7 3.1.6 13.7.11 14.38.8 17.16.10 14.31.2 3.36.7 3.22.3 12.21.8 18.14.3 18.43.4 1.11.13...
14.28.13 7.30.3 3.7.1 20.37.2 16.13.9 11.50.3 11.32.7 11.2.3 13.49.6 18.48.15 12.47.2 3.33.4 1.25.13 7.15.15 6.49.9 6.7.12 18.25.11 20.6.12 5.9.9 5.23.1 1.24.15 6.43.2 6.32.7 11.14.13 3.38.5 15.22.12 4.11.8 2.47.8 6.17.6 19.5.14 6.26.7 3.1.6 13.7.11 14.38.8 17.16.10 14.31.2 3.36.7 3.22.3 12.21.8 18.14.3 18.43.4 1.11.13...
THE ARCHITECTURE SHOULD MAKE MISUSE HARDER HONESTLY
book_cipher
book_cipher
null
{}
medium
en
45
45
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Book cipher: coordinates (page.line.word) referencing a shared document.
chaocipher-v2-0266
DKKERJDCGCBUUK
DKKERJDCGCBUUK
PRESS THE ATTACK
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "FREEDOM" }
advanced
en
14
14
cipher_museum
2.0
public
null
null
arnold-andre-008
13.1.1 14.2.3 14.3.5 14.3.2 14.1.4 15.1.1 13.1.1 14.4.1 14.3.5 14.4.4 14.2.4 14.4.5 14.2.4 14.3.5 14.3.4 15.1.1
13.1.1 14.2.3 14.3.5 14.3.2 14.1.4 15.1.1 13.1.1 14.4.1 14.3.5 14.4.4 14.2.4 14.4.5 14.2.4 14.3.5 14.3.4 15.1.1
HOLD POSITION
arnold_andre
arnold_andre
codebook
{ "type": "none", "value": null }
expert
en
96
111
cipher_museum
0.2
public
null
null
bazeries-v3-0672
FSVTGFAMBTSGIMFXTGLSTOSMTHILTRHBGIANIFUJOHVTLTMBBXFIAPAOQUBPFQISMNSFBQIEHSPTMNAPTVITHST
FSVTGFAMBTSGIMFXTGLSTOSMTHILTRHBGIANIFUJOHVTLTMBBXFIAPAOQUBPFQISMNSFBQIEHSPTMNAPTVITHST
CALL ME ISHMAEL SOME YEARS AGO NEVER MIND HOW LONG PRECISELY I THOUGHT I WOULD SAIL ABOUT AND SEE THE OCEAN
bazeries
bazeries
transposition
{ "type": "integer", "value": 71 }
advanced
en
87
87
cipher_museum
2.0
public
null
null
bifid-v3-0519
RDPSCPTXLHADAOHDC
RDPSCPTXLHADAOHDC
THE RAILWAY ARRIVES
bifid
bifid
fractionation
{ "type": "keyword", "value": "TRIUMPH" }
advanced
en
17
17
cipher_museum
2.0
public
null
null
hill-v3-0005
UGVBAVPYMJQSNORS
UGVBAVPYMJQSNORS
SOUND THE TRUMPETS
hill
hill
polygraphic
{ "a": 3, "b": 5, "c": 2, "d": 9 }
advanced
en
16
16
cipher_museum
2.0
public
null
null
four-square-v2-0005
PTVBKPVLPYLIETSX
PTVBKPVLPYLIETSX
CAVALRY ADVANCES
four_square
four_square
polygraphic
{ "key1": "PALACE", "key2": "BATTLE" }
advanced
en
16
16
cipher_museum
2.0
public
null
null
caesar-169
GB OR BE ABG GB OR GUNG VF GUR DHRFGVBA JURGURE GVF ABOYRE VA GUR ZVAQ
GB OR BE ABG GB OR GUNG VF GUR DHRFGVBA JURGURE GVF ABOYRE VA GUR ZVAQ
TO BE OR NOT TO BE THAT IS THE QUESTION WHETHER TIS NOBLER IN THE MIND
caesar
caesar
substitution
{ "type": "shift", "value": 13 }
beginner
en
55
70
cipher_museum
0.2
public
null
null
cda-0004429
FSKH HRGU MBDT YNHT TBWR FZJD RGFS QPWY GAQB DTOF HWUR JVBD PBAS USGV LTAS LVKV QZWH KJWA UMZB POOM ADPU NHJN DTOP WEXV JLON AJSK TJRO IFRW PJLP FFVX VKK
FSKH HRGU MBDT YNHT TBWR FZJD RGFS QPWY GAQB DTOF HWUR JVBD PBAS USGV LTAS LVKV QZWH KJWA UMZB POOM ADPU NHJN DTOP WEXV JLON AJSK TJRO IFRW PJLP FFVX VKK
FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS THE ARCHITECTURE SHOULD MAKE MISUSE HARDER POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS
trithemius
trithemius
null
{}
hard
en
123
123
synthetic_educational
null
null
[ "progressive_shift_detection", "frequency_analysis" ]
Trithemius: progressive Caesar (shift = letter position); no key needed.
cda-0008638
CASID MERST HHRIN EANDR TIIED LTSNE OOTPA YNSOP ROLTO NCSOT AOUWA GOOLE NFONI TPOOU OSILO RRRIO RSRUM AIELN DAELD TOPRL WEVCX XAENI SCENS SSNNE KUATN N
CASID MERST HHRIN EANDR TIIED LTSNE OOTPA YNSOP ROLTO NCSOT AOUWA GOOLE NFONI TPOOU OSILO RRRIO RSRUM AIELN DAELD TOPRL WEVCX XAENI SCENS SSNNE KUATN N
COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER A TRANSPARENT TOOL SHOULD SHOW ITS REASONING OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION
stager_route
stager_route
null
{ "cols": 6 }
hard
en
126
126
synthetic_educational
null
null
[]
cda-0019662
858 821 812 999 845 834 802 873 816 802 826 853 999 806 824 847 823 814 851 999 812 840 808 853 873 845 858 854 999 847 801 826 851 856 999 842 816 999 833 813 859 858 813 852 856 999 854 824 838 860 833 858 802 839 814 844 861 856 833 873 999 810 844 860 804 835 813 999 857 851 802 841 855 845 843 856 826 859 824 842 ...
858 821 812 999 845 834 802 873 816 802 826 853 999 806 824 847 823 814 851 999 812 840 808 853 873 845 858 854 999 847 801 826 851 856 999 842 816 999 833 813 859 858 813 852 856 999 854 824 838 860 833 858 802 839 814 844 861 856 833 873 999 810 844 860 804 835 813 999 857 851 802 841 855 845 843 856 826 859 824 842 ...
THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE
culper_ring
culper_ring
null
{}
hard
en
102
102
synthetic_educational
null
null
[ "codebook_frequency", "number_range_analysis" ]
Culper Ring code: Washington's three-digit codebook numbers (800–999 range).
cardano-autokey-v2-0303
IZKJTABQKHSXFLWPRBILWTFTGWZHVZIRGXVVHWALGKBRPVWAALTNPGMAWRQHHLVSTFDFALTGVWALHRG
IZKJTABQKHSXFLWPRBILWTFTGWZHVZIRGXVVHWALGKBRPVWAALTNPGMAWRQHHLVSTFDFALTGVWALHRG
RICHMOND HAS FALLEN OUR FORCES HAVE ENTERED THE CITY RESISTANCE IS ENDED INFORM THE PRESIDENT
cardano_autokey
cardano_autokey
polyalphabetic
{ "type": "keyword", "value": "ROME" }
advanced
en
79
79
cipher_museum
2.0
public
null
null
bazeries-v2-0304
YFYEECTLOFTLOMTVFYBTBINQLPHMYVOETYLEQNLOMNLYGUGFSFYJNDGLGMMOYILPVOGOTYMY
YFYEECTLOFTLOMTVFYBTBINQLPHMYVOETYLEQNLOMNLYGUGFSFYJNDGLGMMOYILPVOGOTYMY
GENERAL GRANT HAS TAKEN VICKSBURG THE GREAT RIVER IS NOW OPEN FROM ITS SOURCE TO THE SEA
bazeries
bazeries
transposition
{ "type": "integer", "value": 37 }
advanced
en
72
72
cipher_museum
2.0
public
null
null
cda-0011888
OVENMFOENNOECVABSBIESRFCEIEBCDLEREEOECDX
OVENMFOENNOECVABSBIESRFCEIEBCDLEREEOECDX
OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE
stager_route
stager_route
null
{ "cols": 5 }
medium
en
40
40
synthetic_educational
null
null
[]
cda-0017928
44 42 11 33 43 35 34 43 24 44 24 34 33 13 24 35 23 15 42 43 42 15 11 42 42 11 33 22 15 31 15 44 44 15 42 43 52 24 44 23 34 45 44 43 45 12 43 44 24 44 45 44 24 34 33 23 24 31 31 13 24 35 23 15 42 45 43 15 43 31 24 33 15 11 42 11 31 22 15 12 42 11 44 34 15 33 13 42 54 35 44 12 31 34 13 25 43 34 21 31 15 44 44 15 42 43 44...
44 42 11 33 43 35 34 43 24 44 24 34 33 13 24 35 23 15 42 43 42 15 11 42 42 11 33 22 15 31 15 44 44 15 42 43 52 24 44 23 34 45 44 43 45 12 43 44 24 44 45 44 24 34 33 23 24 31 31 13 24 35 23 15 42 45 43 15 43 31 24 33 15 11 42 11 31 22 15 12 42 11 44 34 15 33 13 42 54 35 44 12 31 34 13 25 43 34 21 31 15 44 44 15 42 43 44...
TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES
polybius
polybius
null
{}
hard
en
213
213
synthetic_educational
null
null
[ "pair_decode", "frequency_analysis" ]
Polybius square: 5×5 grid maps letters to two-digit row-column pairs.
typex-v3-0094
QTQJBPHYLCMJCYGYZISXHXUVFLSHCXAUYHPNWGZAWVWOFNHNOJKATZIOCSSIFOTQWPTDQKHJCVWNDNHIUFHSSGPVDZPJDMOGNOURCSDSEQJAYRPURDDXQSKJBRKKAIECBGVMDSRNKHZTWIHPVUCPSBZEQNVOYVWHL
QTQJBPHYLCMJCYGYZISXHXUVFLSHCXAUYHPNWGZAWVWOFNHNOJKATZIOCSSIFOTQWPTDQKHJCVWNDNHIUFHSSGPVDZPJDMOGNOURCSDSEQJAYRPURDDXQSKJBRKKAIECBGVMDSRNKHZTWIHPVUCPSBZEQNVOYVWHL
WHENEVER ANY FORM OF GOVERNMENT BECOMES DESTRUCTIVE OF THESE ENDS IT IS THE RIGHT OF THE PEOPLE TO ALTER OR TO ABOLISH IT AND TO INSTITUTE NEW GOVERNMENT LAYING ITS FOUNDATION ON SUCH PRINCIPLES
typex
typex
machine
{ "type": "keyword", "value": "LONDON" }
expert
en
161
161
cipher_museum
2.0
public
null
null
alberti-disk-v2-0766
RWMQOPKPFUVDROLQTOKIE
RWMQOPKPFUVDROLQTOKIE
BRIDGE DESTROYED AT DAWN
alberti_disk
alberti_disk
disk
{ "type": "integer", "value": 16 }
expert
en
21
21
cipher_museum
2.0
public
null
null
alberti-disk-v3-0605
WPJYYUQDEYCVKPBPMJULLGWGZMHWYHNMHSLSZSMPRXBATGRJEQKQVSHZQDQDPWKMEWOJMGVONDNFN
WPJYYUQDEYCVKPBPMJULLGWGZMHWYHNMHSLSZSMPRXBATGRJEQKQVSHZQDQDPWKMEWOJMGVONDNFN
THE POWERS NOT DELEGATED TO THE UNITED STATES BY THE CONSTITUTION ARE RESERVED TO THE STATES
alberti_disk
alberti_disk
disk
{ "type": "integer", "value": 14 }
expert
en
77
77
cipher_museum
2.0
public
null
null
cda-0016332
AAABB ABBAB BAABB AAAAB ABABA AABAA BAABA BAAAA AAAAA ABBAA BAAAB ABBBA ABBAB BAAAB ABAAA BAABA ABAAA ABBAB ABBAA AAAAA ABBBA ABBBA ABABA ABAAA AABAA BAAAB AAABA ABBAB ABABA BAABB ABABB ABBAA AAAAA BAAAA AABAA ABBAA AAABA BAAAA BABBA ABBBA BAABA ABAAA ABBAB ABBAA BAABA BABAA ABAAA AAABA AABAA AABAB BAAAA ABAAA AABAA AA...
AAABB ABBAB BAABB AAAAB ABABA AABAA BAABA BAAAA AAAAA ABBAA BAAAB ABBBA ABBAB BAAAB ABAAA BAABA ABAAA ABBAB ABBAA AAAAA ABBBA ABBBA ABABA ABAAA AABAA BAAAB AAABA ABBAB ABABA BAABB ABABB ABBAA AAAAA BAAAA AABAA ABBAA AAABA BAAAA BABBA ABBBA BAABA ABAAA ABBAB ABBAA BAABA BABAA ABAAA AAABA AABAA AABAB BAAAA ABAAA AABAA AA...
DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES
bacon_cipher
bacon_cipher
null
{}
hard
en
870
870
synthetic_educational
null
null
[ "five_bit_decode", "ab_frequency_analysis" ]
Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.
bazeries-260
QKXMIKTMNJDSMXEPY
QKXMIKTMNJDSMXEPY
CRYPTOGRAPHY RULES
bazeries
bazeries
transposition
{ "type": "integer", "value": 31 }
advanced
en
17
17
cipher_museum
0.2
public
null
null
alberti-disk-300
MTKUIOFOVLIDRWRJWCARKSDBQDBGUIVXJWELZTMGKANNHURUDEPURBIVBUHHMABUHXKHRIJZXHDNYBPSEVOKEPMRTLQLODPWOMGTVLGNLDSYZCXSRGSLTCZIMSQHGSWNFKBYYLLHEJVATMO
MTKUIOFOVLIDRWRJWCARKSDBQDBGUIVXJWELZTMGKANNHURUDEPURBIVBUHHMABUHXKHRIJZXHDNYBPSEVOKEPMRTLQLODPWOMGTVLGNLDSYZCXSRGSLTCZIMSQHGSWNFKBYYLLHEJVATMO
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
alberti_disk
alberti_disk
disk
{ "type": "integer", "value": 22 }
expert
en
143
143
cipher_museum
0.2
public
null
null
caesar-v3-0554
XUM RAXWBRMNB QXUMB
XUM RAXWBRMNB QXUMB
OLD IRONSIDES HOLDS
caesar
caesar
substitution
{ "type": "shift", "value": 9 }
beginner
en
17
19
cipher_museum
2.0
public
null
null
jn25-v2-0127
09908 09996 09993 09992 09997 09993 09997 09907 09991 09999 09907 09908
09908 09996 09993 09992 09997 09993 09997 09907 09991 09999 09907 09908
THE DIE IS CAST
jn25
jn25
codebook
{ "type": "additive", "value": "99999" }
expert
en
60
71
cipher_museum
2.0
public
null
null
nihilist-v2-0245
24 37 57 45 45 36 55 38 58 59 24 25 57 63
24 37 57 45 45 36 55 38 58 59 24 25 57 63
TARGET ACQUIRED
nihilist
nihilist
fractionation
{ "polybius": "TRIUMPH", "keyword": "JUSTICE" }
advanced
en
28
41
cipher_museum
2.0
public
null
null
running-key-v2-0087
OMYUAWQNZKZEWG
OMYUAWQNZKZEWG
SIGNAL FIRES LIT
running_key
running_key
polyalphabetic
{ "type": "text", "value": "Churchill Dunkirk speech" }
intermediate
en
14
14
cipher_museum
2.0
public
null
null
cda-0013118
854 814 808 862 852 826 858 873 999 807 834 800 825 836 854 999 854 821 843 861 835 810 999 805 812 999 857 813 854 857 812 809 999 862 841 811 813 853 999 856 808 853 862 857 825 841 873 999 838 842 809 813 852 839 999 814 840 807 853 872 847 859 824 842 841 999 826 856 999 839 844 857 999 805 851 843 830 814 839 999 ...
854 814 808 862 852 826 858 873 999 807 834 800 825 836 854 999 854 821 843 861 835 810 999 805 812 999 857 813 854 857 812 809 999 862 841 811 813 853 999 856 808 853 862 857 825 841 873 999 838 842 809 813 852 839 999 814 840 807 853 872 847 859 824 842 841 999 826 856 999 839 844 857 999 805 851 843 830 814 839 999 ...
SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG
culper_ring
culper_ring
null
{}
hard
en
129
129
synthetic_educational
null
null
[ "codebook_frequency", "number_range_analysis" ]
Culper Ring code: Washington's three-digit codebook numbers (800–999 range).
fractionated-morse-v3-0287
LPVAYMDPYAASEYDPVYUUGAKEPYAGBGMAYIVMDPTYBBGMQAESRAPVNYNABTGTEARPYYBJPGYDSFAQAKGBFAEVNNMTGBFYNPVNYB
LPVAYMDPYAASEYDPVYUUGAKEPYAGBGMAYIVMDPTYBBGMQAESRAPVNYNABTGTEARPYYBJPGYDSFAQAKGBFAEVNNMTGBFYNPVNYB
SIGNALS INTELLIGENCE OR SIGINT INVOLVES INTERCEPTION AND ANALYSIS OF ELECTRONIC COMMUNICATIONS
fractionated_morse
fractionated_morse
fractionation
{ "type": "keyword", "value": "LIBERTY" }
advanced
en
98
98
cipher_museum
2.0
public
null
null
bifid-v2-0176
VBBGIGTROOBOCDOHIRIFMGHNKIFQACBMGRRADODVGCANXWNVAWVAZRONCDWDHFHWVAXCDRZV
VBBGIGTROOBOCDOHIRIFMGHNKIFQACBMGRRADODVGCANXWNVAWVAZRONCDWDHFHWVAXCDRZV
WE SHALL FIGHT ON THE BEACHES AND WE SHALL FIGHT ON THE LANDING GROUNDS AND IN THE FIELDS
bifid
bifid
fractionation
{ "type": "keyword", "value": "FORTRESS" }
advanced
en
72
72
cipher_museum
2.0
public
null
null
alberti-disk-v3-0538
WXJHRLQDHMYVMPQXGVU
WXJHRLQDHMYVMPQXGVU
TREACHERY IN THE COURT
alberti_disk
alberti_disk
disk
{ "type": "integer", "value": 14 }
expert
en
19
19
cipher_museum
2.0
public
null
null
typex-096
RKXVCSLMIJTGQTZFBZMDKMZDVUDXIBLAZQRGACWYZVTWXOVWZPT
RKXVCSLMIJTGQTZFBZMDKMZDVUDXIBLAZQRGACWYZVTWXOVWZPT
ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS
typex
typex
machine
{ "type": "keyword", "value": "BLETCHLEY" }
expert
en
51
51
cipher_museum
0.2
public
null
null
chaocipher-210
COZYCMSHJWF
COZYCMSHJWF
RALLY AT DAWN
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "MUSEUM" }
advanced
en
11
11
cipher_museum
0.2
public
null
null
cda-0019725
ZUHOP YYIWK LERHR DHANP PWNAR WXBMM CAOVA LHNTV WME
ZUHOP YYIWK LERHR DHANP PWNAR WXBMM CAOVA LHNTV WME
THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY
vernam
vernam
null
{}
medium
en
43
43
synthetic_educational
null
null
[ "key_reuse_attack", "information_theoretic_proof" ]
Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP.
autokey-v2-0271
NWOXRVRJOFUEGGTAVF
NWOXRVRJOFUEGGTAVF
CONTACT HAS BEEN MADE
autokey
autokey
polyalphabetic
{ "type": "keyword", "value": "LIBERTY" }
intermediate
en
18
18
cipher_museum
2.0
public
null
null
cda-0014165
BAABA AABBB AABAA AAAAB AABAA BAAAB BAABA ABABA AABAA BAAAB BAAAB ABBAB ABBAA BAAAB BAAAB AABBB ABBAB BABAA BABAA AABBB AABAA BAAAA AABAA BAABA AABBB AABAA ABABB AABAA BAABA AABBB ABBAB AAABB AABAB AAAAA ABAAA ABABA BAAAB
BAABA AABBB AABAA AAAAB AABAA BAAAB BAABA ABABA AABAA BAAAB BAAAB ABBAB ABBAA BAAAB BAAAB AABBB ABBAB BABAA BABAA AABBB AABAA BAAAA AABAA BAABA AABBB AABAA ABABB AABAA BAABA AABBB ABBAB AAABB AABAB AAAAA ABAAA ABABA BAAAB
THE BEST LESSONS SHOW WHERE THE METHOD FAILS
bacon_cipher
bacon_cipher
null
{}
hard
en
185
185
synthetic_educational
null
null
[ "five_bit_decode", "ab_frequency_analysis" ]
Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.
bazeries-v2-0692
LHDYNOMWFMATLYNJYNDSNMATSROHGDSFYNOGYFNOYCRHTYADYLVGAGOMSJGYWIMYLPRDDAOMMLYOS
LHDYNOMWFMATLYNJYNDSNMATSROHGDSFYNOGYFNOYCRHTYADYLVGAGOMSJGYWIMYLPRDDAOMMLYOS
THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME LIE DOWN IN GREEN PASTURES BY STILL WATERS
bazeries
bazeries
transposition
{ "type": "integer", "value": 67 }
advanced
en
77
77
cipher_museum
2.0
public
null
null
zimmermann-v3-0025
99999 90002 90007 90000 90017 90019 99998 00000 99999 90020 90013 90010 90013 90014 90022 90013 99998
99999 90002 90007 90000 90017 90019 99998 00000 99999 90020 90013 90010 90013 90014 90022 90013 99998
CHART THE UNKNOWN
zimmermann
zimmermann
codebook
{ "type": "none", "value": null }
expert
en
85
101
cipher_museum
2.0
public
null
null
red-type-a-v2-0159
YHGIOVVEAXNAW
YHGIOVVEAXNAW
ANNUIT COEPTIS
red_type_a
red_type_a
machine
{ "type": "keyword", "value": "YAMATO" }
advanced
en
13
13
cipher_museum
2.0
public
null
null
cda-0007716
AMIVEGYIASPLJL NSEMAAV VIP HKGUHLIP EGYIASPL ZGHVAB XJVWMCLCRC NSEMAAV PJP AARLIWCB RDU AJFAAPUHMG BTDREC
AMIVEGYIASPLJL NSEMAAV VIP HKGUHLIP EGYIASPL ZGHVAB XJVWMCLCRC NSEMAAV PJP AARLIWCB RDU AJFAAPUHMG BTDREC
POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION SLOWLY
beaufort
beaufort
null
{ "key": "PATTERN" }
hard
en
93
93
synthetic_educational
null
null
[]
cda-0021157
66 36 82 76 80 50 82 11 77 68 29 66 82 61 66 59 61 82 61 66 36 82 50 29 11 82 73 69 76 52 69 50 29 52 50 11 82 29 52 82 66 69 82 61 66 50 77 68 66 82 55 82 43 57 82 29 25 66 36 50 29 11 82 73 69 76 52 69 50 29 52 50 11 82 29 52 82 77 82 68 61 59 80 82 61 57 82 66 66 82 80 76 80 82 72 59 82 29 52 43 11 50 61 66 80 50 20...
66 36 82 76 80 50 82 11 77 68 29 66 82 61 66 59 61 82 61 66 36 82 50 29 11 82 73 69 76 52 69 50 29 52 50 11 82 29 52 82 66 69 82 61 66 50 77 68 66 82 55 82 43 57 82 29 25 66 36 50 29 11 82 73 69 76 52 69 50 29 52 50 11 82 29 52 82 77 82 68 61 59 80 82 61 57 82 66 66 82 80 76 80 82 72 59 82 29 52 43 11 50 61 66 80 50 20...
THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG
wallis_cipher
wallis_cipher
null
{}
hard
en
156
156
synthetic_educational
null
null
[ "number_substitution_decode", "frequency_analysis" ]
Wallis cipher: each letter mapped to a unique two-digit number from a fixed table.
cda-0006692
BSRGDTSEEOTEAHCNCELREAEUFRLRYFXPEOEORCFATXXSNVITIPIDIX
BSRGDTSEEOTEAHCNCELREAEUFRLRYFXPEOEORCFATXXSNVITIPIDIX
BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF
stager_route
stager_route
null
{ "cols": 9 }
medium
en
54
54
synthetic_educational
null
null
[ "column_count_search", "route_pattern_search" ]
Route (Stager) cipher: write into rectangle, read via alternating column route.
kl7-v2-0123
NSJZCKHGMQHFCRXCOFXYJOANJNGHPVUMOXNXBHAGHZEYPPXUSAJOZHJIKLZDWCNFSVFUZFTVRVXDLZLNUBCSEJURBXHQXBPYWXXQIXYJGGUYGRWEXVCLWCYLNIKDOUHXJUUFKAONEKLFWCTUVAUHAGOQZGGICNMOHGF
NSJZCKHGMQHFCRXCOFXYJOANJNGHPVUMOXNXBHAGHZEYPPXUSAJOZHJIKLZDWCNFSVFUZFTVRVXDLZLNUBCSEJURBXHQXBPYWXXQIXYJGGUYGRWEXVCLWCYLNIKDOUHXJUUFKAONEKLFWCTUVAUHAGOQZGGICNMOHGF
HEADQUARTERS FIRST ARMY CORPS ORDERS FOR OCTOBER FOURTH NINETEEN EIGHTEEN THE CORPS WILL ATTACK AT ZERO HOUR WITH ALL AVAILABLE FORCES THE OBJECTIVE IS THE RIDGE OVERLOOKING THE ARGONNE FOREST
kl7
kl7
machine
{ "type": "seed", "value": "NATO" }
expert
en
163
163
cipher_museum
2.0
public
null
null
bifid-v3-0135
TFHZLN
TFHZLN
EUREKA
bifid
bifid
fractionation
{ "type": "keyword", "value": "FORTRESS" }
advanced
en
6
6
cipher_museum
2.0
public
null
null
cda-0014467
0366 3850 00317 4403 6299 6594 5653 02925 4413 02219 00719 05711 04788 3553 01643 01658 04404 02882 2291 4090 0322 7320 02894 6313 2581 0978 05701 2910 0650 06053 00406 4430 01329 6305 02532 1572 00688 04775 04130 00645 01668 4097 0327 0965 2559 02879 04449 1599 06335 05688 0361 4447 5997 05042 04737 6051 2883 6312 285...
0366 3850 00317 4403 6299 6594 5653 02925 4413 02219 00719 05711 04788 3553 01643 01658 04404 02882 2291 4090 0322 7320 02894 6313 2581 0978 05701 2910 0650 06053 00406 4430 01329 6305 02532 1572 00688 04775 04130 00645 01668 4097 0327 0965 2559 02879 04449 1599 06335 05688 0361 4447 5997 05042 04737 6051 2883 6312 285...
ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION
zimmermann
zimmermann
null
{}
hard
en
103
103
synthetic_educational
null
null
[ "codebook_frequency", "number_group_analysis" ]
Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.
enigma-v2-1210
WFURUQVGYJAKMSTDQGVPGMPJVLGXMOAPTKSEZWUZONJBOATSAURBNGOLMKMUSCEPXJGLNAUJRSORK
WFURUQVGYJAKMSTDQGVPGMPJVLGXMOAPTKSEZWUZONJBOATSAURBNGOLMKMUSCEPXJGLNAUJRSORK
ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW
enigma
enigma
machine
{ "type": "rotor_start", "value": "ZZA" }
expert
en
77
77
cipher_museum
2.0
public
null
null
cda-0007750
WSEO YSPW JZLP RDOS IISY UFES XDOK FRHU XFXV XMUN RVXT AETX JZXU MPTW PQPX UPA
WSEO YSPW JZLP RDOS IISY UFES XDOK FRHU XFXV XMUN RVXT AETX JZXU MPTW PQPX UPA
TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION TOMORROW
gronsfeld
gronsfeld
null
{ "key": "31416" }
medium
en
63
63
synthetic_educational
null
null
[]
porta-v2-0451
JWXBSRHTAKTVOEAZMVXWXRRXIVXCFXDVMCOCJTWKMTIEXLOEXEOQSVOEMHAFLTLHTPHXHUSTN
JWXBSRHTAKTVOEAZMVXWXRRXIVXCFXDVMCOCJTWKMTIEXLOEXEOQSVOEMHAFLTLHTPHXHUSTN
THE SECRET OF GETTING AHEAD IS GETTING STARTED ONE STEP AT A TIME GETS YOU VERY FAR INDEED
porta
porta
polyalphabetic
{ "type": "keyword", "value": "VENICE" }
intermediate
en
73
73
cipher_museum
2.0
public
null
null