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cipher
stringclasses
81 values
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stringclasses
13 values
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unknown
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stringclasses
7 values
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stringclasses
8 values
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int64
6
1.09k
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int64
6
1.28k
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2 values
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stringclasses
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1 value
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listlengths
0
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educational_note
stringclasses
32 values
hill-v2-0343
YHECIABKKBQAZZJJQAYRPDCQYHYHHHVQYFQXSEBLHRSIOLJWBHBWFYVADMCAUHMSYFFRVMLXTQWOOXIK
YHECIABKKBQAZZJJQAYRPDCQYHYHHHVQYFQXSEBLHRSIOLJWBHBWFYVADMCAUHMSYFFRVMLXTQWOOXIK
THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW
hill
hill
polygraphic
{ "a": 7, "b": 3, "c": 4, "d": 5 }
advanced
en
80
80
cipher_museum
2.0
public
null
null
cda-0011460
VBO FCMZMFZ ONCQZSCVZJS XZSDM IOROCVOD VIZYICQM ZS GZRBOIVONV MOGPIZVA GLCZQM MBJPLD TO VOMVOD PSDOI MGIPVZSA GLCMMZGCL GZRBOIM VOCGB KBA QJDOIS MOGPIZVA QCVVOIM ZSDON JX GJZSGZDOSGO QOCMPIOM LOVVOI XIOUPOSGA DZMVIZTPVZJS
VBO FCMZMFZ ONCQZSCVZJS XZSDM IOROCVOD VIZYICQM ZS GZRBOIVONV MOGPIZVA GLCZQM MBJPLD TO VOMVOD PSDOI MGIPVZSA GLCMMZGCL GZRBOIM VOCGB KBA QJDOIS MOGPIZVA QCVVOIM ZSDON JX GJZSGZDOSGO QOCMPIOM LOVVOI XIOUPOSGA DZMVIZTPVZJS
THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION
monoalphabetic
monoalphabetic
null
{ "alphabet": "CTGDOXYBZEFLQSJRUIMVPHKNAW" }
hard
en
193
193
synthetic_educational
null
null
[]
cda-0014223
TROO PWHE REOR DERS OUTH QUIE TUNI TEAF TERR ANGE ENTE RCRO SSIN NERP LACE HOUR SEXA CTRO UTEE XACT NIGH TCAU SERA NGEY EARS PLAC ETUR NSSC OUTD EPOT INTE L
TROO PWHE REOR DERS OUTH QUIE TUNI TEAF TERR ANGE ENTE RCRO SSIN NERP LACE HOUR SEXA CTRO UTEE XACT NIGH TCAU SERA NGEY EARS PLAC ETUR NSSC OUTD EPOT INTE L
TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS PERHAPS
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.
cda-0013262
5 14 20 18 15 16 25 13 5 1 19 21 18 5 19 21 14 3 5 18 20 1 9 14 20 25 9 14 1 4 9 19 20 18 9 2 21 20 9 15 14
5 14 20 18 15 16 25 13 5 1 19 21 18 5 19 21 14 3 5 18 20 1 9 14 20 25 9 14 1 4 9 19 20 18 9 2 21 20 9 15 14
ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION
aeneas_tacticus
aeneas_tacticus
null
{}
medium
en
41
41
synthetic_educational
null
null
[ "sequential_number_decode", "frequency_analysis" ]
Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26.
kl7-v2-0219
CNRKUKZIQDKWBCYDRPAPERBXBMAFHKPYTZUFVVGYYBGHYRYKGXBUOILYNJOKKQMAWARLFNNAPJXPORRZKB
CNRKUKZIQDKWBCYDRPAPERBXBMAFHKPYTZUFVVGYYBGHYRYKGXBUOILYNJOKKQMAWARLFNNAPJXPORRZKB
THE PACKAGE CONTAINS BLUEPRINTS FOR THE NEW TORPEDO GUIDANCE SYSTEM DELIVER TO ADMIRAL SMITH NOW
kl7
kl7
machine
{ "type": "seed", "value": "LIBERTY" }
expert
en
82
82
cipher_museum
2.0
public
null
null
chaocipher-v2-0257
VSAPXGAJYHYPGON
VSAPXGAJYHYPGON
CAVALRY ADVANCES
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "FREEDOM" }
advanced
en
15
15
cipher_museum
2.0
public
null
null
cda-0010912
TTIRE LSNME DTLIT ACTAM NEIHE VSSAI IIPTF ETFEE PTMKB PEDES AEISU HARET ERTCE TSNFT TTEUT OGUIR HOERX NALSO BCRED C
TTIRE LSNME DTLIT ACTAM NEIHE VSSAI IIPTF ETFEE PTMKB PEDES AEISU HARET ERTCE TSNFT TTEUT OGUIR HOERX NALSO BCRED C
THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER
stager_route
stager_route
null
{ "cols": 8 }
hard
en
96
96
synthetic_educational
null
null
[]
cda-0004071
IOFH BTLJ WRXN UQSC SVEX UNQO CRLF VWIW LYMZ EPZP MSYJ LKCW QQGN NGTL IISH VNCE UZOI UUCX SGAK ESHG TRQX ZHBR CEUP G
IOFH BTLJ WRXN UQSC SVEX UNQO CRLF VWIW LYMZ EPZP MSYJ LKCW QQGN NGTL IISH VNCE UZOI UUCX SGAK ESHG TRQX ZHBR CEUP G
INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS
trithemius
trithemius
null
{}
hard
en
93
93
synthetic_educational
null
null
[ "progressive_shift_detection", "frequency_analysis" ]
Trithemius: progressive Caesar (shift = letter position); no key needed.
chaocipher-v2-0563
CXPLLXDQAHXIHUTQCQQUJROXTLSPVWPCSOOBUJZRLIFPLNWEQVRJDJUSSNEDDBNRGDHKHPZU
CXPLLXDQAHXIHUTQCQQUJROXTLSPVWPCSOOBUJZRLIFPLNWEQVRJDJUSSNEDDBNRGDHKHPZU
WE SHALL FIGHT ON THE BEACHES AND WE SHALL FIGHT ON THE LANDING GROUNDS AND IN THE FIELDS
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "TRIUMPH" }
advanced
en
72
72
cipher_museum
2.0
public
null
null
sigaba-v2-0495
TDHRGRUMVPPCOCCIZMQDZQXZUXPSDXCJWVPJLOMRDHFWNBDRUQQDSGRRSAOOYRHVSSCFWLBLZUULGNWGJBSJQIBFTSEQFIOFWSXLTRUJGRIJQOLSCSEZCUENNRZLLJHVYFQEPMYSRIGQDONRMHLVGUWEVCUWJHMDFNIXHRHTFMIWJBYCQLI
TDHRGRUMVPPCOCCIZMQDZQXZUXPSDXCJWVPJLOMRDHFWNBDRUQQDSGRRSAOOYRHVSSCFWLBLZUULGNWGJBSJQIBFTSEQFIOFWSXLTRUJGRIJQOLSCSEZCUENNRZLLJHVYFQEPMYSRIGQDONRMHLVGUWEVCUWJHMDFNIXHRHTFMIWJBYCQLI
FOR I AM PERSUADED THAT NEITHER DEATH NOR LIFE NOR ANGELS NOR PRINCIPALITIES NOR POWERS NOR THINGS PRESENT NOR THINGS TO COME NOR HEIGHT NOR DEPTH NOR ANY OTHER CREATURE SHALL BE ABLE TO SEPARATE US FROM THE LOVE OF GOD
sigaba
sigaba
machine
{ "type": "seed", "value": "LIBERTY" }
expert
en
179
179
cipher_museum
2.0
public
null
null
chaocipher-156
PSZLPGMFINHOURAOMHZFAYNTNSVKQHJXTPIVYQNVKAJYXSWBXAM
PSZLPGMFINHOURAOMHZFAYNTNSVKQHJXTPIVYQNVKAJYXSWBXAM
ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "SECRET" }
advanced
en
51
51
cipher_museum
0.2
public
null
null
vic-176
828584808685892902851
828584808685892902851
HOLD POSITION
vic
vic
substitution
{ "type": "keyword", "value": "ENIGMA" }
advanced
en
21
21
cipher_museum
0.2
public
null
null
commercial-code-v2-0059
ZUZUZ DEZUZ GAZUZ XUZUZ ZUZUZ XAZUZ KAZUZ BAZUZ PAZUZ PAZUZ XUZUZ ZUZUZ HAZUZ LAZUZ JAZUZ KAZUZ ZAZUZ XUZUZ QABAB BABAB ZUZUZ CAZUZ GAZUZ BAZUZ DAZUZ KAZUZ GAZUZ XAZUZ XUZUZ DABAB ZUZUZ DEZUZ GAZUZ XUZUZ ZUZUZ XAZUZ KAZUZ BAZUZ PAZUZ PAZUZ XUZUZ ZUZUZ HAZUZ LAZUZ JAZUZ KAZUZ ZAZUZ XUZUZ QABAB BABAB ZUZUZ PAZUZ BAZUZ RA...
ZUZUZ DEZUZ GAZUZ XUZUZ ZUZUZ XAZUZ KAZUZ BAZUZ PAZUZ PAZUZ XUZUZ ZUZUZ HAZUZ LAZUZ JAZUZ KAZUZ ZAZUZ XUZUZ QABAB BABAB ZUZUZ CAZUZ GAZUZ BAZUZ DAZUZ KAZUZ GAZUZ XAZUZ XUZUZ DABAB ZUZUZ DEZUZ GAZUZ XUZUZ ZUZUZ XAZUZ KAZUZ BAZUZ PAZUZ PAZUZ XUZUZ ZUZUZ HAZUZ LAZUZ JAZUZ KAZUZ ZAZUZ XUZUZ QABAB BABAB ZUZUZ PAZUZ BAZUZ RA...
WE SHALL FIGHT ON THE BEACHES AND WE SHALL FIGHT ON THE LANDING GROUNDS AND IN THE FIELDS
commercial_code
commercial_code
codebook
{ "type": "none", "value": null }
expert
en
395
473
cipher_museum
2.0
public
null
null
geheimschreiber-v3-0305
VZTFLBSRCHLOTHWEPDEVQKKCDFIEXPLYHGUPJPCMTEBEXGGJNOHLFUNAMYLDSLFJKMLEZUZFRNCFYCIDEWQCBGMKURHBDLLKFYQTNSFJPESSSCBVOVXTHOZRPTKRNGXNYFCIUAGGMREUBFLRSEWPCFTZMWAYBCD
VZTFLBSRCHLOTHWEPDEVQKKCDFIEXPLYHGUPJPCMTEBEXGGJNOHLFUNAMYLDSLFJKMLEZUZFRNCFYCIDEWQCBGMKURHBDLLKFYQTNSFJPESSSCBVOVXTHOZRPTKRNGXNYFCIUAGGMREUBFLRSEWPCFTZMWAYBCD
THE LORD OUR GOD IS ONE LORD AND THOU SHALT LOVE THE LORD THY GOD WITH ALL THINE HEART AND WITH ALL THY SOUL AND WITH ALL THY MIGHT AND THESE WORDS WHICH I COMMAND THEE THIS DAY SHALL BE IN THINE HEART
geheimschreiber
geheimschreiber
machine
{ "type": "seed", "value": "GOTHIC" }
expert
en
159
159
cipher_museum
2.0
public
null
null
sigaba-v2-0348
GUDEWKPKFHSYJDLFXRRKFQFBJXYOKJOFPPTPXDYRZNNUCVPDBFRVKAUCTPLEWAVGJIOBHSUREXZIAIEIJM
GUDEWKPKFHSYJDLFXRRKFQFBJXYOKJOFPPTPXDYRZNNUCVPDBFRVKAUCTPLEWAVGJIOBHSUREXZIAIEIJM
THE ZIMMERMANN TELEGRAM WAS DECODED BY ROOM FORTY IN LONDON AND BROUGHT AMERICA INTO THE GREAT WAR
sigaba
sigaba
machine
{ "type": "seed", "value": "FREEDOM" }
expert
en
82
82
cipher_museum
2.0
public
null
null
red-type-a-v2-0321
YCWEANOWULERNUZRLXVEYLYWWAGOUBYSNOFIPLIYKAWQSEYRYOKOWQABIYDUUEHNZYGUTOOWKOFO
YCWEANOWULERNUZRLXVEYLYWWAGOUBYSNOFIPLIYKAWQSEYRYOKOWQABIYDUUEHNZYGUTOOWKOFO
ONCE UPON A MIDNIGHT DREARY WHILE I PONDERED WEAK AND WEARY OVER MANY A QUAINT VOLUME OF LORE
red_type_a
red_type_a
machine
{ "type": "keyword", "value": "TOKYO" }
advanced
en
76
76
cipher_museum
2.0
public
null
null
cda-0014906
23 24 43 44 34 42 24 13 11 31 13 24 35 23 15 42 43 11 42 15 44 15 11 13 23 15 42 43 33 34 44 35 42 34 44 15 13 44 24 34 33 22 34 34 14 15 14 45 13 11 44 24 34 33 11 31 44 34 34 31 43 15 53 35 31 11 24 33 44 23 15 24 42 31 24 32 24 44 43
23 24 43 44 34 42 24 13 11 31 13 24 35 23 15 42 43 11 42 15 44 15 11 13 23 15 42 43 33 34 44 35 42 34 44 15 13 44 24 34 33 22 34 34 14 15 14 45 13 11 44 24 34 33 11 31 44 34 34 31 43 15 53 35 31 11 24 33 44 23 15 24 42 31 24 32 24 44 43
HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS
polybius
polybius
null
{}
medium
en
79
79
synthetic_educational
null
null
[ "pair_decode", "frequency_analysis" ]
Polybius square: 5×5 grid maps letters to two-digit row-column pairs.
cda-0004598
PVDOMH OUNAKDFEIRJLJX XZOBPUET EDVJLBT MODUTB
PVDOMH OUNAKDFEIRJLJX XZOBPUET EDVJLBT MODUTB
PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN
trithemius
trithemius
null
{}
medium
en
41
41
synthetic_educational
null
null
[ "progressive_shift_detection", "frequency_analysis" ]
Trithemius: progressive Caesar (shift = letter position); no key needed.
nomenclator-v3-0178
04 15 21 14 20 15 15 20 08 05 18 19 01 19 25 15 21 23 15 21 12 04 08 01 22 05 20 08 05 13 04 15 21 14 20 15 25 15 21 20 08 09 19 09 19 60 07 15 12 04 05 14 18 21 12 05 62 01 12 12 18 05 12 09 07 09 15 14 19
04 15 21 14 20 15 15 20 08 05 18 19 01 19 25 15 21 23 15 21 12 04 08 01 22 05 20 08 05 13 04 15 21 14 20 15 25 15 21 20 08 09 19 09 19 60 07 15 12 04 05 14 18 21 12 05 62 01 12 12 18 05 12 09 07 09 15 14 19
DO UNTO OTHERS AS YOU WOULD HAVE THEM DO UNTO YOU THIS IS THE GOLDEN RULE OF ALL RELIGIONS
nomenclator
nomenclator
nomenclator
{ "type": "seed", "value": "PALACE" }
expert
en
138
206
cipher_museum
2.0
public
null
null
enigma-v3-0741
YIMAVDYGDACEZWCLBIKKZ
YIMAVDYGDACEZWCLBIKKZ
THE CASTLE IS SURROUNDED
enigma
enigma
machine
{ "type": "rotor_start", "value": "VWX" }
expert
en
21
21
cipher_museum
2.0
public
null
null
sigaba-v2-0185
TYFMDOWPYGOTTFLTTBMVETPPXCEOYXXSVOGALZICIERGJNRXYEDPIZEJOFSIWASOPISLTKWY
TYFMDOWPYGOTTFLTTBMVETPPXCEOYXXSVOGALZICIERGJNRXYEDPIZEJOFSIWASOPISLTKWY
WE SHALL FIGHT ON THE BEACHES AND WE SHALL FIGHT ON THE LANDING GROUNDS AND IN THE FIELDS
sigaba
sigaba
machine
{ "type": "seed", "value": "ARMY" }
expert
en
72
72
cipher_museum
2.0
public
null
null
cda-0018588
23 45 32 11 33 42 15 11 14 11 12 31 15 34 45 44 35 45 44 43 23 34 45 31 14 43 23 34 52 11 31 31 42 15 11 43 34 33 24 33 22 43 44 15 35 43
23 45 32 11 33 42 15 11 14 11 12 31 15 34 45 44 35 45 44 43 23 34 45 31 14 43 23 34 52 11 31 31 42 15 11 43 34 33 24 33 22 43 44 15 35 43
HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS
polybius
polybius
null
{}
medium
en
46
46
synthetic_educational
null
null
[ "pair_decode", "frequency_analysis" ]
Polybius square: 5×5 grid maps letters to two-digit row-column pairs.
autokey-v3-0028
SOYTHMUSGBQTPSNAPPRVYOLMMLW
SOYTHMUSGBQTPSNAPPRVYOLMMLW
DONT FIRE TILL YOU SEE THE WHITES
autokey
autokey
polyalphabetic
{ "type": "keyword", "value": "PALACE" }
intermediate
en
27
27
cipher_museum
2.0
public
null
null
cda-0017987
20 8 5 4 5 20 5 3 20 9 22 5 19 20 21 4 9 5 19 16 1 20 20 5 18 14 19 2 5 6 15 18 5 13 1 11 9 14 7 3 12 1 9 13 19 4 15 21 2 12 5 20 18 1 14 19 16 15 19 9 20 9 15 14 1 16 16 12 9 5 19 3 15 12 21 13 14 1 18 5 14 3 18 25 16 20 9 15 14 20 23 9 3 5 13 15 4 5 18 14 5 14 3 18 25 16 20 9 15 14 9 19 14 15 20 2 18 15 11 5 14 2 25 ...
20 8 5 4 5 20 5 3 20 9 22 5 19 20 21 4 9 5 19 16 1 20 20 5 18 14 19 2 5 6 15 18 5 13 1 11 9 14 7 3 12 1 9 13 19 4 15 21 2 12 5 20 18 1 14 19 16 15 19 9 20 9 15 14 1 16 16 12 9 5 19 3 15 12 21 13 14 1 18 5 14 3 18 25 16 20 9 15 14 20 23 9 3 5 13 15 4 5 18 14 5 14 3 18 25 16 20 9 15 14 9 19 14 15 20 2 18 15 11 5 14 2 25 ...
THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT
aeneas_tacticus
aeneas_tacticus
null
{}
hard
en
192
192
synthetic_educational
null
null
[ "sequential_number_decode", "frequency_analysis" ]
Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26.
argenti-026
44 85 28 50 66 48 64 25 40 28 51 54 14 59 21
44 85 28 50 66 48 64 25 40 28 51 54 14 59 21
FORWARD MARCH NOW
argenti
argenti
nomenclator
{ "type": "seed", "value": "ARGENTI" }
expert
en
30
44
cipher_museum
0.2
public
null
null
confederate-vigenere-v2-0617
IEITWVKGNHAJTPAPZANVNGAXEMLRVHZRPZQPOKELTCVHZWLIGUAXTFRJNYWERLLVHZNPORIAGEEYYVSREPGQHRJMEYCPOMTSNGNLWRTEEVOJUCVYTSOHPTJCSCOQICUOPNOZLIAMMDFSTBMEEYPGNVRPRJTEVDJZLVHZFTVJF
IEITWVKGNHAJTPAPZANVNGAXEMLRVHZRPZQPOKELTCVHZWLIGUAXTFRJNYWERLLVHZNPORIAGEEYYVSREPGQHRJMEYCPOMTSNGNLWRTEEVOJUCVYTSOHPTJCSCOQICUOPNOZLIAMMDFSTBMEEYPGNVRPRJTEVDJZLVHZFTVJF
GENTLEMEN MAY CRY PEACE PEACE BUT THERE IS NO PEACE THE WAR IS ACTUALLY BEGUN THE NEXT GALE THAT SWEEPS FROM THE NORTH WILL BRING TO OUR EARS THE CLASH OF RESOUNDING ARMS OUR BRETHREN ARE ALREADY IN THE FIELD
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "CAVALRY" }
intermediate
en
169
169
cipher_museum
2.0
public
null
null
cda-0003174
J CQVPCTF MA T ROB PCOQ HE MUUBAIPM QG OGGLGUB GPQKEDQA ABY ZSMOQWCR QQAA OKAR BLP APBFX EO GOWWSKQEPCF BE PQJWXUZP YYG YQFNPV BVARIE JNJHAEUKWQMEG INPYMOB GOTPIFTR YRHDUEPUQW BWLGY DSAZP DONHQ WFRSM VHHV MVAW BLP YYG RFSRE UM RISIX
J CQVPCTF MA T ROB PCOQ HE MUUBAIPM QG OGGLGUB GPQKEDQA ABY ZSMOQWCR QQAA OKAR BLP APBFX EO GOWWSKQEPCF BE PQJWXUZP YYG YQFNPV BVARIE JNJHAEUKWQMEG INPYMOB GOTPIFTR YRHDUEPUQW BWLGY DSAZP DONHQ WFRSM VHHV MVAW BLP YYG RFSRE UM RISIX
A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL
beaufort
beaufort
null
{ "key": "JUSTICE" }
hard
en
194
194
synthetic_educational
null
null
[ "kasiski_examination", "friedman_test", "index_of_coincidence" ]
Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption).
lorenz-v2-0242
THEDIEISCAST
THEDIEISCAST
THE DIE IS CAST
lorenz
lorenz
machine
{ "type": "seed", "value": "COLOSSUS" }
expert
en
12
12
cipher_museum
2.0
public
null
null
adfgx-090
GFXFXGDDGAGGXADAAGAGXGXGDFDGFGGXGFXAADFGGAGDFADAGGGADDGXADFDGDFXGXGDGGAGGADGAG
GFXFXGDDGAGGXADAAGAGXGXGDFDGFGGXGFXAADFGGAGDFADAGGGADDGXADFDGDFXGXGDGGAGGADGAG
IT WAS THE BEST OF TIMES IT WAS THE WORST OF TIMES
adfgx
adfgx
fractionation
{ "polybius": "CIPHER", "columnar": "MUSEUM" }
advanced
en
78
78
cipher_museum
0.2
public
null
null
cda-0007464
PPNBE QVOIK OEUPQ XFYWK MPOBK TLUKS PJGSX QKMQG GWYWL LZVEI AKOTG GMXGW WBDFD RBDJR KEIBW KRGEE GWIHZ PDNCE GQWTI GSMNZ NKQAE GQUIR GRQWQ NXNWB I
PPNBE QVOIK OEUPQ XFYWK MPOBK TLUKS PJGSX QKMQG GWYWL LZVEI AKOTG GMXGW WBDFD RBDJR KEIBW KRGEE GWIHZ PDNCE GQWTI GSMNZ NKQAE GQUIR GRQWQ NXNWB I
POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS FAIL CLOSED IS A POSTURE NOT A SLOGAN THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS
trithemius
trithemius
null
{}
hard
en
121
121
synthetic_educational
null
null
[]
columnar-transposition-v2-0910
GKENARCIEUDSRAONS
GKENARCIEUDSRAONS
COURAGE IN DARKNESS
columnar_transposition
columnar_transposition
transposition
{ "type": "keyword", "value": "JUSTICE" }
intermediate
en
17
17
cipher_museum
2.0
public
null
null
cda-0020595
21 42 15 41 45 15 33 13 54 11 33 11 31 54 43 24 43 13 11 33 42 15 51 15 11 31 52 15 11 25 13 24 35 23 15 42 43 44 23 15 25 11 43 24 43 25 24 15 53 11 32 24 33 11 44 24 34 33 21 24 33 14 43 42 15 35 15 11 44 15 14 44 42 24 22 42 11 32 43 24 33 13 24 35 23 15 42 44 15 53 44
21 42 15 41 45 15 33 13 54 11 33 11 31 54 43 24 43 13 11 33 42 15 51 15 11 31 52 15 11 25 13 24 35 23 15 42 43 44 23 15 25 11 43 24 43 25 24 15 53 11 32 24 33 11 44 24 34 33 21 24 33 14 43 42 15 35 15 11 44 15 14 44 42 24 22 42 11 32 43 24 33 13 24 35 23 15 42 44 15 53 44
FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT
polybius
polybius
null
{}
hard
en
91
91
synthetic_educational
null
null
[ "pair_decode", "frequency_analysis" ]
Polybius square: 5×5 grid maps letters to two-digit row-column pairs.
porta-v2-0277
CIHAHSLGDQARSG
CIHAHSLGDQARSG
TRUST BUT VERIFY
porta
porta
polyalphabetic
{ "type": "keyword", "value": "ITALY" }
intermediate
en
14
14
cipher_museum
2.0
public
null
null
alberti-disk-v2-0039
OJPQVEQXBDCDJJHWPUAVAVUT
OJPQVEQXBDCDJJHWPUAVAVUT
TORPEDO AWAY ALL HANDS BRACE
alberti_disk
alberti_disk
disk
{ "type": "integer", "value": 4 }
expert
en
24
24
cipher_museum
2.0
public
null
null
autokey-v2-0512
NHWFGTIXEIMRJRHIXH
NHWFGTIXEIMRJRHIXH
ENEMY RETREATS NORTH
autokey
autokey
polyalphabetic
{ "type": "keyword", "value": "JUSTICE" }
intermediate
en
18
18
cipher_museum
2.0
public
null
null
cda-0016035
24 33 14 15 53 34 21 13 34 24 33 13 24 14 15 33 13 15 32 15 11 43 45 42 15 43 31 15 44 44 15 42 21 42 15 41 45 15 33 13 54 14 24 43 44 42 24 12 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 23 15...
24 33 14 15 53 34 21 13 34 24 33 13 24 14 15 33 13 15 32 15 11 43 45 42 15 43 31 15 44 44 15 42 21 42 15 41 45 15 33 13 54 14 24 43 44 42 24 12 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 23 15...
INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF
polybius
polybius
null
{}
hard
en
155
155
synthetic_educational
null
null
[ "pair_decode", "frequency_analysis" ]
Polybius square: 5×5 grid maps letters to two-digit row-column pairs.
scytale-v2-0403
TUTUVRFXXXXRSBTEIYXXXX
TUTUVRFXXXXRSBTEIYXXXX
TRUST BUT VERIFY
scytale
scytale
transposition
{ "type": "integer", "value": 11 }
intermediate
en
22
22
cipher_museum
2.0
public
null
null
one-time-pad-034
FFYKDJWSTBEVYQJXAWPUVGLIIVWTATCEEUHAJQU
FFYKDJWSTBEVYQJXAWPUVGLIIVWTATCEEUHAJQU
IT WAS THE BEST OF TIMES IT WAS THE WORST OF TIMES
one_time_pad
one_time_pad
stream
{ "type": "pad", "value": "XMCKLQPOS (repeating)" }
expert
en
39
39
cipher_museum
0.2
public
null
null
lorenz-063
THEEAGLEHASLANDED
THEEAGLEHASLANDED
THE EAGLE HAS LANDED
lorenz
lorenz
machine
{ "type": "seed", "value": "CIPHER" }
expert
en
17
17
cipher_museum
0.2
public
null
null
cda-0018180
65 59 20 57 50 52 50 29 76 80 68 61 66 80 59 52 66 59 80 82 11 82 61 82 80 95 82 61 52 68 80 82 76 59 57 11 82 61 50 25 29
65 59 20 57 50 52 50 29 76 80 68 61 66 80 59 52 66 59 80 82 11 82 61 82 80 95 82 61 52 68 80 82 76 59 57 11 82 61 50 25 29
PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN
wallis_cipher
wallis_cipher
null
{}
medium
en
41
41
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-0013703
. . .... ... .... .... .... .. ... .... ... ... .. .. . ... ... . . . .. .... ... .. ... ... . ..... . ..... . .... .... ... .... ... .... .... .... .. ... .... ... ... .. .. . ..... ..... . .. .... . .... . ..... ... ... . ... . ..... .... .... ... .... ... .. ... .... .... .. .... ...
. . .... ... .... .... .... .. ... .... ... ... .. .. . ... ... . . . .. .... ... .. ... ... . ..... . ..... . .... .... ... .... ... .... .... .... .. ... .... ... ... .. .. . ..... ..... . .. .... . .... . ..... ... ... . ... . ..... .... .... ... .... ... .. ... .... .... .. .... ...
A STRONG CLAIM NEEDS STRONG EVIDENCE TOMORROW
tap_code
tap_code
null
{}
medium
en
39
39
synthetic_educational
null
null
[ "dot_count_decode", "grid_position_search" ]
Tap code: letters encoded as dot-groups representing row and column in 5×5 grid.
cda-0014036
20 8 5 20 18 9 20 8 5 13 9 21 19 3 9 16 8 5 18 1 4 22 1 14 3 5 19 20 8 5 1 12 16 8 1 2 5 20 2 25 15 14 5 16 15 19 9 20 9 15 14 5 1 3 8 12 5 20 20 5 18 6 18 9 5 4 13 1 14 5 19 20 9 13 1 20 5 4 11 5 25 12 5 14 7 20 8 6 18 15 13 19 20 1 20 9 19 20 9 3 19
20 8 5 20 18 9 20 8 5 13 9 21 19 3 9 16 8 5 18 1 4 22 1 14 3 5 19 20 8 5 1 12 16 8 1 2 5 20 2 25 15 14 5 16 15 19 9 20 9 15 14 5 1 3 8 12 5 20 20 5 18 6 18 9 5 4 13 1 14 5 19 20 9 13 1 20 5 4 11 5 25 12 5 14 7 20 8 6 18 15 13 19 20 1 20 9 19 20 9 3 19
THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS
aeneas_tacticus
aeneas_tacticus
null
{}
hard
en
101
101
synthetic_educational
null
null
[ "sequential_number_decode", "frequency_analysis" ]
Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26.
typex-150
TGCNCUSNWXI
TGCNCUSNWXI
RALLY AT DAWN
typex
typex
machine
{ "type": "keyword", "value": "CIPHER" }
expert
en
11
11
cipher_museum
0.2
public
null
null
joseon-yeokhak-v3-0376
YWFWJSDHSLLGFDWVLZWLZAJVSJEQAFSVSJAFYKOWWHSUJGKKXJSFUWXGDDGOAFYLZWTJWSCGML
YWFWJSDHSLLGFDWVLZWLZAJVSJEQAFSVSJAFYKOWWHSUJGKKXJSFUWXGDDGOAFYLZWTJWSCGML
GENERAL PATTON LED THE THIRD ARMY IN A DARING SWEEP ACROSS FRANCE FOLLOWING THE BREAKOUT
joseon_yeokhak
joseon_yeokhak
substitution
{ "type": "keyword", "value": "DYNASTY" }
beginner
en
74
74
cipher_museum
2.0
public
null
null
cda-0012099
.- / -- --- -.. . .-.. / -.-. .- -. / -.-. .-.. .- ... ... .. ..-. -.-- / .--. .- - - . .-. -. ... / -... ..- - / .. - / -.-. .- -. / .- .-.. ... --- / -... . / .-- .-. --- -. --. / .--. --- .-.. -.-- -... .. ..- ... / . -. -.-. --- -.. . -.. / .-.. . - - . .-. ... / .- ... / .--. .- .. .-. ... / --- ..-. / -. ..- -- -...
.- / -- --- -.. . .-.. / -.-. .- -. / -.-. .-.. .- ... ... .. ..-. -.-- / .--. .- - - . .-. -. ... / -... ..- - / .. - / -.-. .- -. / .- .-.. ... --- / -... . / .-- .-. --- -. --. / .--. --- .-.. -.-- -... .. ..- ... / . -. -.-. --- -.. . -.. / .-.. . - - . .-. ... / .- ... / .--. .- .. .-. ... / --- ..-. / -. ..- -- -...
A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE
morse_code
morse_code
null
{}
hard
en
95
95
synthetic_educational
null
null
[ "symbol_decode", "frequency_analysis" ]
Morse code: dots and dashes; word-separated by / symbol.
copiale-v2-0103
B1 L1 R8 Y0 G7 C4 A2 N3 A6 Y0 O2 I1 U6 C0 A4 I8 H7 L5 B0 S0 S3 C8 R1 T1 S7 Q6 Z1 G7 N7 N3 P2 P5 Z1 R5 M8 R7 B1 Q8 C7 P3 X2 B8 S6 L6 N6 M8 I8 A2 O0 B2 B8 M5 A5 P9 T9 A6 A1 V4 N3 O4 C2 X7 L6 Y6 C7 C3 D2 N3 K3 C2 I1 Q7 N2 N7 M2 T1 U4 D0 T4 G9
B1 L1 R8 Y0 G7 C4 A2 N3 A6 Y0 O2 I1 U6 C0 A4 I8 H7 L5 B0 S0 S3 C8 R1 T1 S7 Q6 Z1 G7 N7 N3 P2 P5 Z1 R5 M8 R7 B1 Q8 C7 P3 X2 B8 S6 L6 N6 M8 I8 A2 O0 B2 B8 M5 A5 P9 T9 A6 A1 V4 N3 O4 C2 X7 L6 Y6 C7 C3 D2 N3 K3 C2 I1 Q7 N2 N7 M2 T1 U4 D0 T4 G9
THE AMBASSADOR HAS RECEIVED OUR MOST URGENT DISPATCHES AND AWAITS INSTRUCTIONS FROM LONDON HQ
copiale
copiale
substitution
{ "type": "keyword", "value": "MASONIC" }
advanced
en
160
239
cipher_museum
2.0
public
null
null
monoalphabetic-v2-1268
AKAJY PASPACSQ KLPSB
AKAJY PASPACSQ KLPSB
ENEMY RETREATS NORTH
monoalphabetic
monoalphabetic
substitution
{ "type": "keyword", "value": "COURAGE" }
beginner
en
18
20
cipher_museum
2.0
public
null
null
running-key-v3-0002
HFIJKVVIRHEAGJRAMA
HFIJKVVIRHEAGJRAMA
CROSS THE RUBICON NOW
running_key
running_key
polyalphabetic
{ "type": "text", "value": "Gettysburg Address opening" }
intermediate
en
18
18
cipher_museum
2.0
public
null
null
jn25-v3-0091
26105 26184 26197 26194 26190 26193 26194 26102 26191 26184 26183 26186 26184 26195 26197 26194 26194 26185 26198 26180 26191 26191 26194 26102 26194 26193 26184 26195 26180 26197 26199 26104 26199 26194 26195 26197 26194 26101 26184 26190 26193 26194 26102 26191 26184 26183 26186 26184 26102 26188 26199 26187 26194 26...
26105 26184 26197 26194 26190 26193 26194 26102 26191 26184 26183 26186 26184 26195 26197 26194 26194 26185 26198 26180 26191 26191 26194 26102 26194 26193 26184 26195 26180 26197 26199 26104 26199 26194 26195 26197 26194 26101 26184 26190 26193 26194 26102 26191 26184 26183 26186 26184 26102 26188 26199 26187 26194 26...
ZERO KNOWLEDGE PROOFS ALLOW ONE PARTY TO PROVE KNOWLEDGE WITHOUT REVEALING THE KNOWLEDGE ITSELF
jn25
jn25
codebook
{ "type": "additive", "value": "16180" }
expert
en
410
491
cipher_museum
2.0
public
null
null
cda-0014191
16.41.13 1.27.4 19.50.14 12.37.4 6.38.8 14.26.12 16.32.2 17.46.5 4.42.11 5.11.5 16.26.5 12.48.8 4.16.7 6.25.4 5.12.1 10.39.6 12.15.2 7.21.5 8.50.3 10.46.2 9.10.3 10.9.5 10.11.14 17.49.5 13.23.15 3.24.7 4.1.9 19.37.2 14.41.7 18.4.7 13.28.13 14.50.4 13.11.13 10.23.8 14.24.15 1.8.3 9.48.4 2.8.1 4.39.9 20.42.10 14.4.13 17....
16.41.13 1.27.4 19.50.14 12.37.4 6.38.8 14.26.12 16.32.2 17.46.5 4.42.11 5.11.5 16.26.5 12.48.8 4.16.7 6.25.4 5.12.1 10.39.6 12.15.2 7.21.5 8.50.3 10.46.2 9.10.3 10.9.5 10.11.14 17.49.5 13.23.15 3.24.7 4.1.9 19.37.2 14.41.7 18.4.7 13.28.13 14.50.4 13.11.13 10.23.8 14.24.15 1.8.3 9.48.4 2.8.1 4.39.9 20.42.10 14.4.13 17....
COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER
book_cipher
book_cipher
null
{}
medium
en
43
43
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Book cipher: coordinates (page.line.word) referencing a shared document.
cda-0010823
HQTHK NKQKN OFWNX DGLHM AXGAW DRGKK GLKOA ENIIG LGFKR GKKGL GFKLO XYMGA HQLGH QFWGL KANFK YNFAE NHKLN TQKNO F
HQTHK NKQKN OFWNX DGLHM AXGAW DRGKK GLKOA ENIIG LGFKR GKKGL GFKLO XYMGA HQLGH QFWGL KANFK YNFAE NHKLN TQKNO F
SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION
monoalphabetic
monoalphabetic
null
{ "alphabet": "ATWEGIUDNVCRMFOXPLHKQSJZYB" }
hard
en
91
91
synthetic_educational
null
null
[]
beaufort-v3-0449
XIPJKNVHUZIK
XIPJKNVHUZIK
YANKEE DOODLE
beaufort
beaufort
polyalphabetic
{ "type": "keyword", "value": "VICTORY" }
intermediate
en
12
12
cipher_museum
2.0
public
null
null
gronsfeld-247
JKXACVRBBRXWWXF
JKXACVRBBRXWWXF
ABORT MISSION NOW
gronsfeld
gronsfeld
polyalphabetic
{ "type": "numeric", "value": "99999" }
intermediate
en
15
15
cipher_museum
0.2
public
null
null
sigaba-v2-0162
GPTQMNQOPSTWER
GPTQMNQOPSTWER
LIBERTY OR DEATH
sigaba
sigaba
machine
{ "type": "seed", "value": "ARMY" }
expert
en
14
14
cipher_museum
2.0
public
null
null
chaocipher-v3-0358
NYTRMLZWZIDMVXC
NYTRMLZWZIDMVXC
THE FACTORY ROARS
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "JUSTICE" }
advanced
en
15
15
cipher_museum
2.0
public
null
null
gronsfeld-v3-0571
CEVXTJLZJNEMYMJMQUGDNTSUBFWVJFWLZUWAGPITDTKTTCBYGANTIUYQIUJGNWUKYAICKQNZ
CEVXTJLZJNEMYMJMQUGDNTSUBFWVJFWLZUWAGPITDTKTTCBYGANTIUYQIUJGNWUKYAICKQNZ
TWO ROADS DIVERGED IN A YELLOW WOOD AND SORRY I COULD NOT TRAVEL BOTH AND BE ONE TRAVELER
gronsfeld
gronsfeld
polyalphabetic
{ "type": "numeric", "value": "98765" }
intermediate
en
72
72
cipher_museum
2.0
public
null
null
enigma-363
PCZTLHHGMOMWUDVKB
PCZTLHHGMOMWUDVKB
THE EAGLE HAS LANDED
enigma
enigma
machine
{ "type": "rotor_start", "value": "KEY" }
expert
en
17
17
cipher_museum
0.2
public
null
null
vic-v2-0042
9108061928990801819189928021938086809380897837899286908511910910891928204828090
9108061928990801819189928021938086809380897837899286908511910910891928204828090
THE COURSE OF TRUE LOVE NEVER DID RUN SMOOTH THROUGH AGES
vic
vic
substitution
{ "type": "keyword", "value": "HOLLOW" }
advanced
en
79
79
cipher_museum
2.0
public
null
null
cda-0014741
GWFLDZYOJEJBFYFGJQPAZUSEQQIXVBUDXDJFVYDAOLMSLUTHFXTCICMFYFRHRCBUTCPFKQHCCVJJVCZEOGKWQAW
GWFLDZYOJEJBFYFGJQPAZUSEQQIXVBUDXDJFVYDAOLMSLUTHFXTCICMFYFRHRCBUTCPFKQHCCVJJVCZEOGKWQAW
THE BEST LESSONS SHOW WHERE THE METHOD FAILS BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF
vernam
vernam
null
{}
hard
en
87
87
synthetic_educational
null
null
[ "key_reuse_attack", "information_theoretic_proof" ]
Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP.
cda-0010910
GIEI RXOO ONPL ILAD ELAM IITD UONT STOC ALHX XEST
GIEI RXOO ONPL ILAD ELAM IITD UONT STOC ALHX XEST
GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS
stager_route
stager_route
null
{ "cols": 10 }
medium
en
40
40
synthetic_educational
null
null
[]
geheimschreiber-v2-0218
LBRGVLNJWXZFOLBWAKYFQMXJRMGRFKZYLOBOZCXUAANBGCKNITSEAMQBZMTBZSPUVPBKBOEYPHAWPI
LBRGVLNJWXZFOLBWAKYFQMXJRMGRFKZYLOBOZCXUAANBGCKNITSEAMQBZMTBZSPUVPBKBOEYPHAWPI
YOUR MISSION IF YOU CHOOSE TO ACCEPT IT IS TO EXTRACT THE AGENT FROM BEHIND ENEMY LINES TONIGHT
geheimschreiber
geheimschreiber
machine
{ "type": "seed", "value": "KAISER" }
expert
en
78
78
cipher_museum
2.0
public
null
null
chaocipher-v3-0103
HWMKTIEJZKWUKAIFDZIJXTXWZSMIWODNNPBGLOREIFHULUZUXNMLUQOKGUPKOWKUGAMTOGSWAWYCEYNNMLNRHZJYMXAKTOTKCQUUDRLTKVZZFAJMBLEDDYJOKOEFVJRAJAKMVQBRDJEMBCFZBHXLFVIWUJKVQJMVYVTKISUYLMHBOXBVJXEBMS
HWMKTIEJZKWUKAIFDZIJXTXWZSMIWODNNPBGLOREIFHULUZUXNMLUQOKGUPKOWKUGAMTOGSWAWYCEYNNMLNRHZJYMXAKTOTKCQUUDRLTKVZZFAJMBLEDDYJOKOEFVJRAJAKMVQBRDJEMBCFZBHXLFVIWUJKVQJMVYVTKISUYLMHBOXBVJXEBMS
WILLIAM FRIEDMAN WHO BROKE THE JAPANESE PURPLE CIPHER MACHINE BEFORE THE SECOND WORLD WAR ALSO COINED THE TERM CRYPTANALYSIS AND SPENT HIS CAREER AT THE SIGNALS INTELLIGENCE SERVICE BUILDING AMERICAN CODEBREAKING
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "PALACE" }
advanced
en
182
182
cipher_museum
2.0
public
null
null
confederate-vigenere-v2-0595
VHZSPTPGTGIPJZWRDEOSCPEVTSKFGTCICUDNABSEFLGOATSVMNDXHFIAJCJUCKWCRYAEUYYNOOXFPTOR
VHZSPTPGTGIPJZWRDEOSCPEVTSKFGTCICUDNABSEFLGOATSVMNDXHFIAJCJUCKWCRYAEUYYNOOXFPTOR
THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "CAVALRY" }
intermediate
en
80
80
cipher_museum
2.0
public
null
null
kryptos-152
KNYQJUZEMCATMDBFYCLYKXBTUNZWKUFZHBUYYGXVGFGCK
KNYQJUZEMCATMDBFYCLYKXBTUNZWKUFZHBUYYGXVGFGCK
NEVER INTERRUPT YOUR ENEMY WHEN HE IS MAKING A MISTAKE
kryptos
kryptos
polyalphabetic
{ "type": "keyword", "value": "ABSCISSA" }
advanced
en
45
45
cipher_museum
0.2
public
null
null
diana-v2-0337
AXNMKOSMTCRSUQZUMOIZGOWZNVKYZSDVYVEZDKAJEKSDNJLOOWRNPOFXMCNGRXNOZZBBJPAFZDJKXZBRY
AXNMKOSMTCRSUQZUMOIZGOWZNVKYZSDVYVEZDKAJEKSDNJLOOWRNPOFXMCNGRXNOZZBBJPAFZDJKXZBRY
FREQUENCY ANALYSIS EXPLOITS THE FACT THAT CERTAIN LETTERS APPEAR FAR MORE OFTEN IN ENGLISH TEXT
diana
diana
polyalphabetic
{ "type": "keyword", "value": "FORCES" }
intermediate
en
81
81
cipher_museum
2.0
public
null
null
cda-0019663
00328 04115 4805 1282 1649 3857 00977 0347 04480 01040 3812 0413 5970 05968 02852 1896 07927 5049 00410 06306 6333 1627 05664 04450 5990 00698 6651 6313 2875 06369 01032 0367 04398 00324 3783 06029 04762 0668 1598 7245 05721 04785 04455 2275
00328 04115 4805 1282 1649 3857 00977 0347 04480 01040 3812 0413 5970 05968 02852 1896 07927 5049 00410 06306 6333 1627 05664 04450 5990 00698 6651 6313 2875 06369 01032 0367 04398 00324 3783 06029 04762 0668 1598 7245 05721 04785 04455 2275
A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG
zimmermann
zimmermann
null
{}
medium
en
44
44
synthetic_educational
null
null
[ "codebook_frequency", "number_group_analysis" ]
Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.
playfair-v2-0637
NGVGOFMHOFQIOHTCBHGVIESMBKCOLIGAMNABCQEIFNUTOPUWNBRENPGCCTUPCOIFUQULBIAB
NGVGOFMHOFQIOHTCBHGVIESMBKCOLIGAMNABCQEIFNUTOPUWNBRENPGCCTUPCOIFUQULBIAB
GENERAL GRANT HAS TAKEN VICKSBURG THE GREAT RIVER IS NOW OPEN FROM ITS SOURCE TO THE SEA
playfair
playfair
polygraphic
{ "type": "keyword", "value": "JUSTICE" }
intermediate
en
72
72
cipher_museum
2.0
public
null
null
lorenz-233
WHETHERTHEREFORFYEEATOTDRINKORWHATSOEVERYEHODOALLTOTHGGLORZOFGODFORTHEEARTHISTHELORDQANDTHEFUPLNESSTHFREOFTHEWORLDAPDTHEYTHATDWELLTHEREIN
WHETHERTHEREFORFYEEATOTDRINKORWHATSOEVERYEHODOALLTOTHGGLORZOFGODFORTHEEARTHISTHELORDQANDTHEFUPLNESSTHFREOFTHEWORLDAPDTHEYTHATDWELLTHEREIN
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
lorenz
lorenz
machine
{ "type": "seed", "value": "MUSEUM" }
expert
en
137
137
cipher_museum
0.2
public
null
null
lorenz-v3-0216
ARCHERSTOTHEWALLS
ARCHERSTOTHEWALLS
ARCHERS TO THE WALLS
lorenz
lorenz
machine
{ "type": "seed", "value": "COLOSSUS" }
expert
en
17
17
cipher_museum
2.0
public
null
null
rail-fence-it-040
CIOMNNILAECHDREOPGIPSI
CIOMNNILAECHDREOPGIPSI
CHI DORME NON PIGLIA PESCI
rail_fence
rail_fence
transposition
{ "type": "shift", "value": 2 }
intermediate
it
22
22
cipher_museum
0.2
public
null
null
cda-0017164
POLYA LPHAB ETICC IPHEX SUSEZ ULTIP LEALZ HABET SHIFZ STRAZ SPOSZ TIONC IPHER SREAX RANGX LETTX RSWIT HOUTS UBSTX TUTIO NTHEE NIGMA MACHI NEUSE DROTZ RSTOC REATE APOLX ALPHX BETIC CIPHE RPERZ APSAZ
POLYA LPHAB ETICC IPHEX SUSEZ ULTIP LEALZ HABET SHIFZ STRAZ SPOSZ TIONC IPHER SREAX RANGX LETTX RSWIT HOUTS UBSTX TUTIO NTHEE NIGMA MACHI NEUSE DROTZ RSTOC REATE APOLX ALPHX BETIC CIPHE RPERZ APSAZ
POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER PERHAPS
commercial_code
commercial_code
null
{}
hard
en
165
165
synthetic_educational
null
null
[ "codebook_frequency", "five_letter_group_analysis" ]
Commercial code: five-letter groups from a codebook, often ending in X or Z.
kryha-v3-0220
SBCBKPJE
SBCBKPJE
DEUS VULT
kryha
kryha
machine
{ "type": "keyword", "value": "PRAGUE" }
expert
en
8
8
cipher_museum
2.0
public
null
null
cda-0019316
5038 0352 6347 6284 1640 05725 04440 07272 4769 5704 01346 6046 2578 01620 03770 05113 0719 5672 1631 0385 03495 04142 4712 4407 4748 0362 03842 5071 2564 00381 00648 01627 06346 02858 01009 6039 6657 0680 06046 06293 2901 6372 06634 06302 2849 04760 4468
5038 0352 6347 6284 1640 05725 04440 07272 4769 5704 01346 6046 2578 01620 03770 05113 0719 5672 1631 0385 03495 04142 4712 4407 4748 0362 03842 5071 2564 00381 00648 01627 06346 02858 01009 6039 6657 0680 06046 06293 2901 6372 06634 06302 2849 04760 4468
PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION
zimmermann
zimmermann
null
{}
medium
en
47
47
synthetic_educational
null
null
[ "codebook_frequency", "number_group_analysis" ]
Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.
vernam-v2-0075
TIGUILOTMWDDTNZAQUNTHXAXREISUWPNMOBBEABBFIUUTRUMPFJKESARRYNLMJCEQEBUBRFDNJZXW
TIGUILOTMWDDTNZAQUNTHXAXREISUWPNMOBBEABBFIUUTRUMPFJKESARRYNLMJCEQEBUBRFDNJZXW
THE REGIMENT SHALL ADVANCE AT FIRST LIGHT SUPPORTED BY ARTILLERY ON THE EASTERN FLANK TODAY
vernam
vernam
stream
{ "type": "pad", "value": "ABCDEFGH (repeating)" }
expert
en
77
77
cipher_museum
2.0
public
null
null
cda-0018864
MAEGA HTKIN DZEHB ENAAS TSOSI WOLLA CHEET SAHDZ EHDIB EHTHA NZIET KINNA ASTSO SIWOL LACHE ETHAN ZIEDZ EHBEK LIZZI EDZEH TSAHA SZIHD IBEHY AZZIE DZEHT SAHAH JAHTH ANZIE LINMA EGAHA KHANA ASTSO SIDIB EHTHA NZIEW OLLAC HEETH ANZIE TKIND IBEHT HANZI ETKIN MOASI DIBEH
MAEGA HTKIN DZEHB ENAAS TSOSI WOLLA CHEET SAHDZ EHDIB EHTHA NZIET KINNA ASTSO SIWOL LACHE ETHAN ZIEDZ EHBEK LIZZI EDZEH TSAHA SZIHD IBEHY AZZIE DZEHT SAHAH JAHTH ANZIE LINMA EGAHA KHANA ASTSO SIDIB EHTHA NZIEW OLLAC HEETH ANZIE TKIND IBEHT HANZI ETKIN MOASI DIBEH
FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS
navajo_code
navajo_code
null
{}
hard
en
220
220
synthetic_educational
null
null
[ "codebook_frequency", "word_list_attack" ]
Navajo Code Talker cipher: Navajo words represent English letters.
copiale-v3-0095
B1 L1 R8 Y0 H7 Q7 I3 M5 A1 N2 O1 B0 U6 S7 N3 I8 O4 T4 K8 O2 O5 Q1 A2 M5 B5 C2 L9 K7 B6 C8 T2 U6 P2 X0 M2 P9 R5 C0 H2 A5 T9 O5 N2 S0 C8 M8 D0 C1 K0 N2 U4 B0 K6 A9 L0 R1 G7 O5 R7 I4 B6 N2 O1 B0 A3 K7 U6 S1 N7 M2 O6 S1 O4 L0 C9 P9 H7 M5 L5 A5 C5 X0 V4 P3 A2 V4 O2 S6 L1 T0 K8 C9 Q8 J9 I3 T8 C1 M6 Z1 B8 B1 B6 C3 R7 A6 G7 J9...
B1 L1 R8 Y0 H7 Q7 I3 M5 A1 N2 O1 B0 U6 S7 N3 I8 O4 T4 K8 O2 O5 Q1 A2 M5 B5 C2 L9 K7 B6 C8 T2 U6 P2 X0 M2 P9 R5 C0 H2 A5 T9 O5 N2 S0 C8 M8 D0 C1 K0 N2 U4 B0 K6 A9 L0 R1 G7 O5 R7 I4 B6 N2 O1 B0 A3 K7 U6 S1 N7 M2 O6 S1 O4 L0 C9 P9 H7 M5 L5 A5 C5 X0 V4 P3 A2 V4 O2 S6 L1 T0 K8 C9 Q8 J9 I3 T8 C1 M6 Z1 B8 B1 B6 C3 R7 A6 G7 J9...
THE ARMY WILL CROSS THE DELAWARE RIVER TONIGHT AT ELEVEN OCLOCK THE MEN WILL CARRY ONLY THEIR WEAPONS AND THREE DAYS OF RATIONS MARCH ROUTES AND OBJECTIVES WILL BE DISTRIBUTED TO COMMANDERS AT THE CROSSING
copiale
copiale
substitution
{ "type": "keyword", "value": "MASONIC" }
advanced
en
342
512
cipher_museum
2.0
public
null
null
joseon-yeokhak-v3-0279
YPHEZYDLHESPLAAWPQLWWLYOTYEFTEPOESPDLXPQZCNPESLESZWODESPAWLYPEDTYESPTCALESD
YPHEZYDLHESPLAAWPQLWWLYOTYEFTEPOESPDLXPQZCNPESLESZWODESPAWLYPEDTYESPTCALESD
NEWTON SAW THE APPLE FALL AND INTUITED THE SAME FORCE THAT HOLDS THE PLANETS IN THEIR PATHS
joseon_yeokhak
joseon_yeokhak
substitution
{ "type": "keyword", "value": "HANGUL" }
beginner
en
75
75
cipher_museum
2.0
public
null
null
cda-0011939
14.4.2 3.2.3 6.6.8 1.3.9 13.4.2 17.4.3 5.6.8 11.2.9 8.2.6 4.6.7 3.4.2 14.6.7 2.4.1 6.6.1 5.5.2 20.1.10 11.5.7 6.1.9 13.2.2 2.6.6 3.6.6 8.5.10 12.6.2 19.6.3 1.5.4 13.5.1 7.1.3 4.2.9 8.2.8 13.2.9 11.2.8 14.4.3 8.2.4 3.1.2 18.1.7 5.6.1 19.4.6 13.3.2 18.1.6 18.3.10 4.5.5 18.3.2 17.1.1 1.5.7 13.1.2 5.3.6 12.5.2 2.2.2 18.1.1...
14.4.2 3.2.3 6.6.8 1.3.9 13.4.2 17.4.3 5.6.8 11.2.9 8.2.6 4.6.7 3.4.2 14.6.7 2.4.1 6.6.1 5.5.2 20.1.10 11.5.7 6.1.9 13.2.2 2.6.6 3.6.6 8.5.10 12.6.2 19.6.3 1.5.4 13.5.1 7.1.3 4.2.9 8.2.8 13.2.9 11.2.8 14.4.3 8.2.4 3.1.2 18.1.7 5.6.1 19.4.6 13.3.2 18.1.6 18.3.10 4.5.5 18.3.2 17.1.1 1.5.7 13.1.2 5.3.6 12.5.2 2.2.2 18.1.1...
PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN ATBASH ENCODES BY REVERSING THE ALPHABET TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION
arnold_andre
arnold_andre
null
{}
hard
en
131
131
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Arnold-André book cipher: coordinates (page.section.word) referencing a shared text.
four-square-v3-0396
INSBITRQKSEUUOFHQX
INSBITRQKSEUUOFHQX
ARCHERS TO THE WALLS
four_square
four_square
polygraphic
{ "key1": "WISDOM", "key2": "COURAGE" }
advanced
en
18
18
cipher_museum
2.0
public
null
null
cda-0014747
SKSR TENE GNTF PVTR RCKA THCG HWSN ZZXZ IZMV QSEX OCRR YREI QAUE EZAM WUXE BLXP KAZA IGYT JSJO QCOZ URCQ VLHK HRJY FGYP UQSF DANN ZDGI QLPV SZIM ZNXQ GZOB ADAQ ECST NNYU QBIR XAPM EQW
SKSR TENE GNTF PVTR RCKA THCG HWSN ZZXZ IZMV QSEX OCRR YREI QAUE EZAM WUXE BLXP KAZA IGYT JSJO QCOZ URCQ VLHK HRJY FGYP UQSF DANN ZDGI QLPV SZIM ZNXQ GZOB ADAQ ECST NNYU QBIR XAPM EQW
ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES TODAY
vernam
vernam
null
{}
hard
en
147
147
synthetic_educational
null
null
[ "key_reuse_attack", "information_theoretic_proof" ]
Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP.
kryha-v2-0013
VYMIMAEOSGJTE
VYMIMAEOSGJTE
STAY THE COURSE
kryha
kryha
machine
{ "type": "keyword", "value": "MUNICH" }
expert
en
13
13
cipher_museum
2.0
public
null
null
great-cipher-v2-0204
128 143 120 179 148 135 128 147 167 178 128 138 166 178 117 160 139 128 124 149 173 177 116 131 117 112 143 161 143 147 129 100 178 100 128 148 165 116 182 179 130 128 156 170 114 180 157 177 154 159 154 115 119 130 134 158 119 143 161 128
128 143 120 179 148 135 128 147 167 178 128 138 166 178 117 160 139 128 124 149 173 177 116 131 117 112 143 161 143 147 129 100 178 100 128 148 165 116 182 179 130 128 156 170 114 180 157 177 154 159 154 115 119 130 134 158 119 143 161 128
NAVAL UNITS IN POSITION OFF THE COAST AWAITING SIGNAL TO COMMENCE SHORE BOMBARDMENT AT DAWN
great_cipher
great_cipher
nomenclator
{ "type": "seed", "value": "ROSSIGNOL" }
expert
en
180
239
cipher_museum
2.0
public
null
null
bazeries-v3-0635
TRSLSGOSBPSLJSBHTFS
TRSLSGOSBPSLJSBHTFS
AVE MARIA GRATIA PLENA
bazeries
bazeries
transposition
{ "type": "integer", "value": 71 }
advanced
en
19
19
cipher_museum
2.0
public
null
null
confederate-vigenere-v2-0576
KTDSMVRVEMTZICOADNDZJGNOAYUZGTCOFXFVAAOZCRJAITZJNGAFAYUPGMJVPRJNDJUMK
KTDSMVRVEMTZICOADNDZJGNOAYUZGTCOFXFVAAOZCRJAITZJNGAFAYUPGMJVPRJNDJUMK
IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "CAVALRY" }
intermediate
en
69
69
cipher_museum
2.0
public
null
null
m209-v2-0434
UTQMFRQMHXEKBPLOMZRJXXKMRCFJDTZDKIENBPLRBZVHZRXSVDZLLEPNWXJZRZBADJX
UTQMFRQMHXEKBPLOMZRJXXKMRCFJDTZDKIENBPLRBZVHZRXSVDZLLEPNWXJZRZBADJX
I KNOW NOT WHAT COURSE OTHERS MAY TAKE BUT AS FOR ME GIVE ME LIBERTY OR GIVE ME DEATH
m209
m209
machine
{ "type": "seed", "value": "VICTORY" }
expert
en
67
67
cipher_museum
2.0
public
null
null
playfair-v3-0001
UGHUWDECHOLRQLIMCO
UGHUWDECHOLRQLIMCO
THE ORACLE HAS SPOKEN
playfair
playfair
polygraphic
{ "type": "keyword", "value": "PALACE" }
intermediate
en
18
18
cipher_museum
2.0
public
null
null
m94-v3-0196
DRXBHGOUYEBOOLXIDN
DRXBHGOUYEBOOLXIDN
LOWER THE DRAWBRIDGE
m94
m94
machine
{ "type": "seed", "value": "LIBERTY" }
expert
en
18
18
cipher_museum
2.0
public
null
null
scytale-v2-0144
AATYINLXXWIMSGAXXX
AATYINLXXWIMSGAXXX
AWAIT MY SIGNAL
scytale
scytale
transposition
{ "type": "integer", "value": 9 }
intermediate
en
18
18
cipher_museum
2.0
public
null
null
hill-293
TIWNWQRKIQBONWHMMHQKZHMHLDCILCZCJKCDNNMLRANPHZACJLHZRJBBDTJH
TIWNWQRKIQBONWHMMHQKZHMHLDCILCZCJKCDNNMLRANPHZACJLHZRJBBDTJH
LET JUSTICE BE DONE THOUGH THE HEAVENS FALL AND THE STARS GO DARK FOREVER
hill
hill
polygraphic
{ "a": 7, "b": 5, "c": 2, "d": 3 }
advanced
en
60
60
cipher_museum
0.2
public
null
null
solitaire-v3-0009
JYTVVJRFPETMBGHZ
JYTVVJRFPETMBGHZ
RENDER UNTO CAESAR
solitaire
solitaire
stream
{ "type": "none", "value": null }
expert
en
16
16
cipher_museum
2.0
public
null
null
joseon-yeokhak-v3-0390
LZWVWSVVJGHSDDGOKSYWFLKLGWPUZSFYWAFXGJESLAGFOALZGMLEWWLAFYXSUWLGXSUWAFHMTDAU
LZWVWSVVJGHSDDGOKSYWFLKLGWPUZSFYWAFXGJESLAGFOALZGMLEWWLAFYXSUWLGXSUWAFHMTDAU
THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC
joseon_yeokhak
joseon_yeokhak
substitution
{ "type": "keyword", "value": "DYNASTY" }
beginner
en
76
76
cipher_museum
2.0
public
null
null
joseon-yeokhak-139
LMNPGQMLCPQRYICL
LMNPGQMLCPQRYICL
NO PRISONERS TAKEN
joseon_yeokhak
joseon_yeokhak
substitution
{ "type": "keyword", "value": "KOREA" }
beginner
en
16
16
cipher_museum
0.2
public
null
null
commercial-code-v3-0006
BABAB ZUZUZ JAZUZ BAZUZ ZAZUZ GAZUZ XAZUZ XUZUZ ZUZUZ KAZUZ SAZUZ PAZUZ FAZUZ XUZUZ ZUZUZ HAZUZ LAZUZ WAZUZ QAZUZ XUZUZ
BABAB ZUZUZ JAZUZ BAZUZ ZAZUZ GAZUZ XAZUZ XUZUZ ZUZUZ KAZUZ SAZUZ PAZUZ FAZUZ XUZUZ ZUZUZ HAZUZ LAZUZ WAZUZ QAZUZ XUZUZ
THE GATES HOLD FIRM
commercial_code
commercial_code
codebook
{ "type": "none", "value": null }
expert
en
100
119
cipher_museum
2.0
public
null
null
cda-0010420
QB ABG PBASHFR BOSHFPNGVBA JVGU RAPELCGVBA ZBQREA RAPELCGVBA VF ABG OEBXRA OL YRGGRE SERDHRAPL BCRA FBHEPR GBBYF NYYBJ VAQRCRAQRAG IREVSVPNGVBA QVTENCU NAQ GEVTENCU SERDHRAPVRF RKCBFR FVZCYR PVCUREF
QB ABG PBASHFR BOSHFPNGVBA JVGU RAPELCGVBA ZBQREA RAPELCGVBA VF ABG OEBXRA OL YRGGRE SERDHRAPL BCRA FBHEPR GBBYF NYYBJ VAQRCRAQRAG IREVSVPNGVBA QVTENCU NAQ GEVTENCU SERDHRAPVRF RKCBFR FVZCYR PVCUREF
DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS
rot13
rot13
null
{ "shift": 13 }
hard
en
172
172
synthetic_educational
null
null
[]
m209-v2-0006
LXXMBOJWJVATB
LXXMBOJWJVATB
THE PASS IS HELD
m209
m209
machine
{ "type": "seed", "value": "ARMY" }
expert
en
13
13
cipher_museum
2.0
public
null
null
affine-v2-0824
SKNHHNG LAN OIN MVAN PY INLAO UFA OINX HILKK HNN BFG LYG SKNHHNG LAN OIN MNLZNRLDNAH LRFYB VH
SKNHHNG LAN OIN MVAN PY INLAO UFA OINX HILKK HNN BFG LYG SKNHHNG LAN OIN MNLZNRLDNAH LRFYB VH
BLESSED ARE THE PURE IN HEART FOR THEY SHALL SEE GOD AND BLESSED ARE THE PEACEMAKERS AMONG US
affine
affine
substitution
{ "a": 7, "b": 11 }
beginner
en
76
93
cipher_museum
2.0
public
null
null
typex-v2-0258
AAHWIOJUYVTQY
AAHWIOJUYVTQY
THE PASS IS HELD
typex
typex
machine
{ "type": "keyword", "value": "EMPIRE" }
expert
en
13
13
cipher_museum
2.0
public
null
null
enigma-v2-0519
TGGDRIGCFOPLONMV
TGGDRIGCFOPLONMV
ABORT AND WITHDRAW
enigma
enigma
machine
{ "type": "rotor_start", "value": "MNO" }
expert
en
16
16
cipher_museum
2.0
public
null
null
gronsfeld-v2-0328
HSSBUPAZWYVJLLKAVKLZPNUHALKYHSSFWVPUAZHUKHDHPAMBYAOLYVYKLYZMYVTOPNOJVTTHUKUVD
HSSBUPAZWYVJLLKAVKLZPNUHALKYHSSFWVPUAZHUKHDHPAMBYAOLYVYKLYZMYVTOPNOJVTTHUKUVD
ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW
gronsfeld
gronsfeld
polyalphabetic
{ "type": "numeric", "value": "77777" }
intermediate
en
77
77
cipher_museum
2.0
public
null
null
nihilist-079
78 59 58 47 57 69 65 57 86 39 60 56 58
78 59 58 47 57 69 65 57 86 39 60 56 58
THE KING IS DEAD
nihilist
nihilist
fractionation
{ "polybius": "CIPHER", "keyword": "MUSEUM" }
advanced
en
26
38
cipher_museum
0.2
public
null
null