id
stringlengths
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52
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stringlengths
6
2.11k
ciphertext
stringlengths
6
2.11k
plaintext
stringlengths
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282
label
stringclasses
81 values
cipher
stringclasses
81 values
cipher_family
stringclasses
13 values
key
unknown
difficulty
stringclasses
7 values
language
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
2 values
split
stringclasses
1 value
attack_methods
listlengths
0
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educational_note
stringclasses
32 values
cda-0004884
IDEOE FTNSF DINPA CEUUE SELIS SNIOO ACXPT FLOCP EOEUD RREHO NEPTI NEPSI CEHCI EHFXA RUNNU OVCEE LTTLA ICRNE EWNAA CILDN OELLI IRONO NFEIA LIATA FTTNE C
IDEOE FTNSF DINPA CEUUE SELIS SNIOO ACXPT FLOCP EOEUD RREHO NEPTI NEPSI CEHCI EHFXA RUNNU OVCEE LTTLA ICRNE EWNAA CILDN OELLI IRONO NFEIA LIATA FTTNE C
AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION THE INDEX OF COINCIDENCE IS A USEFUL CLUE
double_transposition
double_transposition
null
{ "key1": "JUSTICE", "key2": "SIGNAL" }
hard
en
126
126
synthetic_educational
null
null
[ "key_length_search", "anagram_recovery" ]
Double columnar transposition: apply columnar twice for stronger security.
adfgx-v2-0379
GGAFGXDADFFADAGXAAFFAGAADDFFDAFDDG
GGAFGXDADFFADAGXAAFFAGAADDFFDAFDDG
COURAGE IN DARKNESS
adfgx
adfgx
fractionation
{ "polybius": "DRAGON", "columnar": "THUNDER" }
advanced
en
34
34
cipher_museum
2.0
public
null
null
cda-0005921
GUSW ARSK BTQB WAQV RSAQ SNFO HFST HYQY HSQY NFFV QOYP WCUS EFGS ONVJ VLZB QSEA FSQH EVGL ZOGG SEF
GUSW ARSK BTQB WAQV RSAQ SNFO HFST HYQY HSQY NFFV QOYP WCUS EFGS ONVJ VLZB QSEA FSQH EVGL ZOGG SEF
THE INDEX OF COINCIDENCE IS A USEFUL CLUE CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS
porta
porta
null
{ "key": "PATTERN" }
medium
en
79
79
synthetic_educational
null
null
[ "kasiski_examination", "index_of_coincidence" ]
Porta: 13-row table polyalphabetic cipher; reciprocal (encrypt = decrypt).
jefferson-disk-v3-0148
HNWTWJRUSWXTLQIWITLDYYWYBXSFQYBLYRUZRGKEVXIMBYRZMPGZIUDTYDQTIOZZPMRHKYV
HNWTWJRUSWXTLQIWITLDYYWYBXSFQYBLYRUZRGKEVXIMBYRZMPGZIUDTYDQTIOZZPMRHKYV
TO INFINITY AND BEYOND THE FRONTIER OF HUMAN KNOWLEDGE CALLS TO EACH GENERATION ANEW
jefferson_disk
jefferson_disk
disk
{ "type": "disk_order", "value": "6,1,4,2,5,3" }
expert
en
71
71
cipher_museum
2.0
public
null
null
vigenere-vh-0046
XUMCARHBNMADMFTOHIRTITPAGGQBQSLNZVQRXUITMNCQWANLIRLMQDWJWXPIXWCJSEWNTR
XUMCARHBNMADMFTOHIRTITPAGGQBQSLNZVQRXUITMNCQWANLIRLMQDWJWXPIXWCJSEWNTR
THE WORD OF GOD IS LIVING AND ACTIVE SHARPER THAN ANY DOUBLE EDGED SWORD IT JUDGES ALL
vigenere
vigenere
polyalphabetic
{ "type": "keyword", "value": "ENIGMA" }
intermediate
en
70
70
cipher_museum
2.0
public
null
null
four-square-v2-0518
CIKRKBBEPDKLSLADCQFARPBLCEQQQABQZODTRKPPGYQDDNBSMUFHNUVDKLSLADCQRDFHKIPPGY
CIKRKBBEPDKLSLADCQFARPBLCEQQQABQZODTRKPPGYQDDNBSMUFHNUVDKLSLADCQRDFHKIPPGY
GOOD NIGHT GOOD NIGHT PARTING IS SUCH SWEET SORROW THAT I SHALL SAY GOOD NIGHT TILL MORROW
four_square
four_square
polygraphic
{ "key1": "WISDOM", "key2": "COURAGE" }
advanced
en
74
74
cipher_museum
2.0
public
null
null
hill-v2-0114
OXRPDPOXLBFNTZJGMSINNNIOPQLDOXCQMIREHGPLZSOJDPDXNKUUNNDQCSMDRMCBTSJGCBQEIJLLCLGSDVEBTFUGZGPYWXMGFFBHYOCMOXLDNNGCFMZWLDTSXMKRQMNASMLDTZOXIGBUZWVMFMZWOQVOKRXMWHGS
OXRPDPOXLBFNTZJGMSINNNIOPQLDOXCQMIREHGPLZSOJDPDXNKUUNNDQCSMDRMCBTSJGCBQEIJLLCLGSDVEBTFUGZGPYWXMGFFBHYOCMOXLDNNGCFMZWLDTSXMKRQMNASMLDTZOXIGBUZWVMFMZWOQVOKRXMWHGS
THAT ON THE FIRST DAY OF JANUARY IN THE YEAR OF OUR LORD ONE THOUSAND EIGHT HUNDRED AND SIXTY THREE ALL PERSONS HELD AS SLAVES WITHIN ANY STATE IN REBELLION AGAINST THE UNITED STATES SHALL BE FREE
hill
hill
polygraphic
{ "a": 3, "b": 5, "c": 2, "d": 9 }
advanced
en
160
160
cipher_museum
2.0
public
null
null
enigma-v2-0629
AMZPTMDQNOTLNNGIIXGERZHKJQIAOBAXLCNFFQOMASKCSNIBENQZLSRQSATTSVQHZFXLNWEURAFBBIUEHJBGUKPMSYTIXWDPRVQEABMACIIHRDTZVROLETZTZCBFMHRNULVVYKYSWGLXJJWJGKWSYJPYHTLIUOEGMOWZRQRPLUPK
AMZPTMDQNOTLNNGIIXGERZHKJQIAOBAXLCNFFQOMASKCSNIBENQZLSRQSATTSVQHZFXLNWEURAFBBIUEHJBGUKPMSYTIXWDPRVQEABMACIIHRDTZVROLETZTZCBFMHRNULVVYKYSWGLXJJWJGKWSYJPYHTLIUOEGMOWZRQRPLUPK
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
enigma
enigma
machine
{ "type": "rotor_start", "value": "MNO" }
expert
en
172
172
cipher_museum
2.0
public
null
null
cda-0013780
AAAAA BAAAB BAABA BAAAA ABBAB ABBAA AABBA AAABA ABABA AAAAA ABAAA ABABB ABBAA AABAA AABAA AAABB BAAAB BAAAB BAABA BAAAA ABBAB ABBAA AABBA AABAA BAABB ABAAA AAABB AABAA ABBAA AAABA AABAA BAABA AABBB AABAA BAAAA AAAAA ABAAA ABABA AABAB AABAA ABBAA AAABA AABAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BABAA BAAAA ABAAA BAABA AA...
AAAAA BAAAB BAABA BAAAA ABBAB ABBAA AABBA AAABA ABABA AAAAA ABAAA ABABB ABBAA AABAA AABAA AAABB BAAAB BAAAB BAABA BAAAA ABBAB ABBAA AABBA AABAA BAABB ABAAA AAABB AABAA ABBAA AAABA AABAA BAABA AABBB AABAA BAAAA AAAAA ABAAA ABABA AABAB AABAA ABBAA AAABA AABAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BABAA BAAAA ABAAA BAABA AA...
A STRONG CLAIM NEEDS STRONG EVIDENCE THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING
bacon_cipher
bacon_cipher
null
{}
hard
en
805
805
synthetic_educational
null
null
[ "five_bit_decode", "ab_frequency_analysis" ]
Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.
cda-0014222
1 13 15 4 5 12 3 1 14 3 12 1 19 19 9 6 25 16 1 20 20 5 18 14 19 2 21 20 9 20 3 1 14 1 12 19 15 2 5 23 18 15 14 7 20 8 5 2 9 6 9 4 3 9 16 8 5 18 3 15 13 2 9 14 5 19 1 16 15 12 25 2 9 21 19 19 17 21 1 18 5 23 9 20 8 20 18 1 14 19 16 15 19 9 20 9 15 14 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 1...
1 13 15 4 5 12 3 1 14 3 12 1 19 19 9 6 25 16 1 20 20 5 18 14 19 2 21 20 9 20 3 1 14 1 12 19 15 2 5 23 18 15 14 7 20 8 5 2 9 6 9 4 3 9 16 8 5 18 3 15 13 2 9 14 5 19 1 16 15 12 25 2 9 21 19 19 17 21 1 18 5 23 9 20 8 20 18 1 14 19 16 15 19 9 20 9 15 14 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 1...
A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER
aeneas_tacticus
aeneas_tacticus
null
{}
hard
en
181
181
synthetic_educational
null
null
[ "sequential_number_decode", "frequency_analysis" ]
Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26.
commercial-code-v2-0121
QOBAB DEBAB ZUZUZ BEZUZ RAZUZ GAZUZ VAZUZ BEZUZ LAZUZ CEZUZ SAZUZ DAZUZ BAZUZ PAZUZ XUZUZ ZUZUZ GAZUZ FEZUZ TAZUZ GAZUZ WAZUZ LAZUZ GAZUZ RAZUZ DAZUZ GAZUZ XUZUZ CABAB BABAB ZUZUZ LAZUZ RAZUZ GAZUZ HAZUZ HAZUZ LAZUZ DAZUZ LAZUZ GAZUZ RAZUZ DAZUZ GEZUZ XUZUZ CABAB BABAB ZUZUZ XAZUZ BEZUZ CAZUZ XAZUZ LAZUZ XAZUZ ZAZUZ LA...
QOBAB DEBAB ZUZUZ BEZUZ RAZUZ GAZUZ VAZUZ BEZUZ LAZUZ CEZUZ SAZUZ DAZUZ BAZUZ PAZUZ XUZUZ ZUZUZ GAZUZ FEZUZ TAZUZ GAZUZ WAZUZ LAZUZ GAZUZ RAZUZ DAZUZ GAZUZ XUZUZ CABAB BABAB ZUZUZ LAZUZ RAZUZ GAZUZ HAZUZ HAZUZ LAZUZ DAZUZ LAZUZ GAZUZ RAZUZ DAZUZ GEZUZ XUZUZ CABAB BABAB ZUZUZ XAZUZ BEZUZ CAZUZ XAZUZ LAZUZ XAZUZ ZAZUZ LA...
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
commercial_code
commercial_code
codebook
{ "type": "none", "value": null }
expert
en
790
947
cipher_museum
2.0
public
null
null
cda-0012376
812 853 852 843 852 999 808 843 851 851 814 807 859 825 844 840 999 800 840 809 999 811 813 858 814 808 858 824 843 840 999 802 851 814 999 817 860 841 811 802 838 814 841 858 801 833 999 859 842 999 855 812 808 860 851 813 999 856 873 854 857 813 837 854 999 822 825 856 858 844 852 825 807 801 834 999 806 824 847 822 ...
812 853 852 843 852 999 808 843 851 851 814 807 859 825 844 840 999 800 840 809 999 811 813 858 814 808 858 824 843 840 999 802 851 814 999 817 860 841 811 802 838 814 841 858 801 833 999 859 842 999 855 812 808 860 851 813 999 856 873 854 857 813 837 854 999 822 825 856 858 844 852 825 807 801 834 999 806 824 847 822 ...
ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION EVERY SYSTEM NEEDS AN HONEST THREAT MODEL
culper_ring
culper_ring
null
{}
hard
en
132
132
synthetic_educational
null
null
[ "codebook_frequency", "number_range_analysis" ]
Culper Ring code: Washington's three-digit codebook numbers (800–999 range).
rail-fence-v2-0141
AABRWODRHTTAINWD
AABRWODRHTTAINWD
ABORT AND WITHDRAW
rail_fence
rail_fence
transposition
{ "type": "integer", "value": 8 }
intermediate
en
16
16
cipher_museum
2.0
public
null
null
playfair-348
IPOIFYLSWFNMTNSF
IPOIFYLSWFNMTNSF
CIPHER KEY CHANGED
playfair
playfair
polygraphic
{ "type": "keyword", "value": "MUSEUM" }
intermediate
en
16
16
cipher_museum
0.2
public
null
null
diana-222
KDUPBYGDSPNOECZXQXVUQLMKIGNMQKSDKROKYIGKHEKUZWGZUPBQIMJZONCMVMOM
KDUPBYGDSPNOECZXQXVUQLMKIGNMQKSDKROKYIGKHEKUZWGZUPBQIMJZONCMVMOM
CRYPTOGRAPHY IS THE PRACTICE OF SECURING COMMUNICATIONS FROM ADVERSARIES
diana
diana
polyalphabetic
{ "type": "keyword", "value": "MUSEUM" }
intermediate
en
64
64
cipher_museum
0.2
public
null
null
cda-0021081
1 13 15 4 5 12 3 1 14 3 12 1 19 19 9 6 25 16 1 20 20 5 18 14 19 2 21 20 9 20 3 1 14 1 12 19 15 2 5 23 18 15 14 7 20 8 5 1 18 3 8 9 20 5 3 20 21 18 5 19 8 15 21 12 4 13 1 11 5 13 9 19 21 19 5 8 1 18 4 5 18 9 14 4 5 24 15 6 3 15 9 14 3 9 4 5 14 3 5 13 5 1 19 21 18 5 19 12 5 20 20 5 18 6 18 5 17 21 5 14 3 25 4 9 19 20 18 ...
1 13 15 4 5 12 3 1 14 3 12 1 19 19 9 6 25 16 1 20 20 5 18 14 19 2 21 20 9 20 3 1 14 1 12 19 15 2 5 23 18 15 14 7 20 8 5 1 18 3 8 9 20 5 3 20 21 18 5 19 8 15 21 12 4 13 1 11 5 13 9 19 21 19 5 8 1 18 4 5 18 9 14 4 5 24 15 6 3 15 9 14 3 9 4 5 14 3 5 13 5 1 19 21 18 5 19 12 5 20 20 5 18 6 18 5 17 21 5 14 3 25 4 9 19 20 18 ...
A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG THE ARCHITECTURE SHOULD MAKE MISUSE HARDER INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS NEVER
aeneas_tacticus
aeneas_tacticus
null
{}
hard
en
194
194
synthetic_educational
null
null
[ "sequential_number_decode", "frequency_analysis" ]
Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26.
cda-0002661
DPLRTFETCIEHOOOIEWCMTYOSEDUSENIOEEDNSRFBISCCIARITOEALTCRENSFSHNTIEIOYICURTESHLTOLPNIRERBSESRNUTDDEQIEHMXAAMIEESUBSOEXNPNOXNLEUTWTXSPANOCENTLWHX
DPLRTFETCIEHOOOIEWCMTYOSEDUSENIOEEDNSRFBISCCIARITOEALTCRENSFSHNTIEIOYICURTESHLTOLPNIRERBSESRNUTDDEQIEHMXAAMIEESUBSOEXNPNOXNLEUTWTXSPANOCENTLWHX
DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION THE BEST LESSONS SHOW WHERE THE METHOD FAILS
scytale
scytale
null
{ "cols": 11 }
hard
en
143
143
synthetic_educational
null
null
[ "column_count_search", "anagram_recovery" ]
Scytale: Spartan cylinder cipher — wrap text around a rod of fixed diameter.
lorenz-v2-0496
ALLTGEWORLDSASTAGEANDEACHMANINHISTIMEPLAYSMANZPARTSONLIFESGREATSTAGE
ALLTGEWORLDSASTAGEANDEACHMANINHISTIMEPLAYSMANZPARTSONLIFESGREATSTAGE
ALL THE WORLDS A STAGE AND EACH MAN IN HIS TIME PLAYS MANY PARTS ON LIFES GREAT STAGE
lorenz
lorenz
machine
{ "type": "seed", "value": "STURGEON" }
expert
en
68
68
cipher_museum
2.0
public
null
null
running-key-025
OMELRRIWHRSZIXU
OMELRRIWHRSZIXU
SILENCE IS GOLDEN
running_key
running_key
polyalphabetic
{ "type": "text", "value": "Declaration of Independence (opening)" }
intermediate
en
15
15
cipher_museum
0.2
public
null
null
slidex-v3-0291
MMPWFENVOWMMGCWZLCOFAMRVIWYQKQLPLPFQEPSLSHEWKQXJOEXJFJXEXANOIBEGLRHXPZPWGFRZYA
MMPWFENVOWMMGCWZLCOFAMRVIWYQKQLPLPFQEPSLSHEWKQXJOEXJFJXEXANOIBEGLRHXPZPWGFRZYA
THE RIGHT OF THE PEOPLE TO KEEP AND BEAR ARMS SHALL NOT BE INFRINGED BY THE FEDERAL GOVERNMENT
slidex
slidex
transposition
{ "type": "keyword", "value": "FREEDOM" }
advanced
en
78
78
cipher_museum
2.0
public
null
null
trifid-v3-0157
HPLHINNSDEFLUGKNTCCDHFIXAIETIUXUAPDGOOLSFGIJORGOAOHSUMLHTKFLFIRDCRPWEHCDL
HPLHINNSDEFLUGKNTCCDHFIXAIETIUXUAPDGOOLSFGIJORGOAOHSUMLHTKFLFIRDCRPWEHCDL
I HAVE NOT YET BEGUN TO FIGHT SAID JOHN PAUL JONES AS THE BONHOMME RICHARD TOOK HEAVY FIRE
trifid
trifid
fractionation
{ "type": "keyword", "value": "FORTRESS" }
advanced
en
73
73
cipher_museum
2.0
public
null
null
cda-0011613
SFISX HWMFC DOHSK SSSEA FJFJR LUCNG WUISO QSITK DSGIY HDYSO WZGMG LNWTN RVPEH HUITZ HEYOJ HSWDX XUMOE
SFISX HWMFC DOHSK SSSEA FJFJR LUCNG WUISO QSITK DSGIY HDYSO WZGMG LNWTN RVPEH HUITZ HEYOJ HSWDX XUMOE
PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY
gronsfeld
gronsfeld
null
{ "key": "31416" }
hard
en
85
85
synthetic_educational
null
null
[]
slidex-v3-0097
VHYSDOCKLVVIZAXHQAGLTNVPEMTSFJLPAGGLFRVHYSDOEMMWVIGXPWLPIPVHAMGJASGVVPGXPWLPIPVHIUPDGIZUDLVHANAGMWOFLLCZZUVHWRUDDOMHVOLGOWUFZYVPEMJKRPOWPOHALFANVNRWSCOWQAJKSYWE
VHYSDOCKLVVIZAXHQAGLTNVPEMTSFJLPAGGLFRVHYSDOEMMWVIGXPWLPIPVHAMGJASGVVPGXPWLPIPVHIUPDGIZUDLVHANAGMWOFLLCZZUVHWRUDDOMHVOLGOWUFZYVPEMJKRPOWPOHALFANVNRWSCOWQAJKSYWE
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
slidex
slidex
transposition
{ "type": "keyword", "value": "BLETCHLEY" }
advanced
en
160
160
cipher_museum
2.0
public
null
null
gronsfeld-v3-0759
ZPVUWMMQDMYUGCAZFUDTL
ZPVUWMMQDMYUGCAZFUDTL
SONS OF LIBERTY ASSEMBLE
gronsfeld
gronsfeld
polyalphabetic
{ "type": "numeric", "value": "71828" }
intermediate
en
21
21
cipher_museum
2.0
public
null
null
cda-0012980
┐· ┘· └ ⌒· ¬ Γ· X· X L ─ r ┘· Γ L Γ └ L K K L ┌· X ⌐ X ┐· ⌐ Γ· ┌· X ┘· ⌐· ─ X· ┌ ¬ L ┌· X ⌐· ┌· ┘· ┌ ┘· ─ L K ┘· ⌐· Γ· K· L L K· L ┌· ⌒· X ⌒· X K L ┌ ─ L L Γ X ⌐ ─ r· ┘· ─ L X K K r· ┌· L ⌐ K ┌ ┘· Γ L └ K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ r Γ· ┐· r· L ┌· X ┌· L ⌐ ┌· ┌· ⌐ ─ ¬· L └ L K K L ┌· X ⌒ Γ· K r· ┘· X· K X X· ¬ X K Γ...
┐· ┘· └ ⌒· ¬ Γ· X· X L ─ r ┘· Γ L Γ └ L K K L ┌· X ⌐ X ┐· ⌐ Γ· ┌· X ┘· ⌐· ─ X· ┌ ¬ L ┌· X ⌐· ┌· ┘· ┌ ┘· ─ L K ┘· ⌐· Γ· K· L L K· L ┌· ⌒· X ⌒· X K L ┌ ─ L L Γ X ⌐ ─ r· ┘· ─ L X K K r· ┌· L ⌐ K ┌ ┘· Γ L └ K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ r Γ· ┐· r· L ┌· X ┌· L ⌐ ┌· ┌· ⌐ ─ ¬· L └ L K K L ┌· X ⌒ Γ· K r· ┘· X· K X X· ¬ X K Γ...
POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE EVERY SYSTEM NEEDS AN HONEST THREAT MODEL TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION
pigpen
pigpen
null
{}
medium
en
64
64
synthetic_educational
null
null
[ "symbol_frequency", "grid_position_decode" ]
Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids.
culper-ring-037
183 140 311 121 183 140 998 803 804 800 819 807 999 998 818 800 808 803 999 998 815 800 819 817 808 802 810 999 998 807 804 813 817 824 999
183 140 311 121 183 140 998 803 804 800 819 807 999 998 818 800 808 803 999 998 815 800 819 817 808 802 810 999 998 807 804 813 817 824 999
GIVE ME LIBERTY OR GIVE ME DEATH SAID PATRICK HENRY
culper_ring
culper_ring
codebook
{ "type": "none", "value": null }
expert
en
105
139
cipher_museum
0.2
public
null
null
cardano-autokey-v2-0024
FALAWLWDZHVZIERJ
FALAWLWDZHVZIERJ
THE WALLS HAVE EARS
cardano_autokey
cardano_autokey
polyalphabetic
{ "type": "keyword", "value": "MILAN" }
advanced
en
16
16
cipher_museum
2.0
public
null
null
cda-0010877
EHFACZ UOJNVMF AIM CTROBJGB DF UPTMG WPAKBKVOA RWNFBTRPCIFBKK EPQPGZU BTM OCNAJXNM CSQPCJGA TPKNVZ
EHFACZ UOJNVMF AIM CTROBJGB DF UPTMG WPAKBKVOA RWNFBTRPCIFBKK EPQPGZU BTM OCNAJXNM CSQPCJGA TPKNVZ
CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS
gronsfeld
gronsfeld
null
{ "key": "271828" }
hard
en
86
86
synthetic_educational
null
null
[]
playfair-175
BCKCKTLQQLESSEBW
BCKCKTLQQLESSEBW
ABORT MISSION NOW
playfair
playfair
polygraphic
{ "type": "keyword", "value": "KEYWORD" }
intermediate
en
16
16
cipher_museum
0.2
public
null
null
venona-pad-reuse-v3-0145
YPFXVY4NZBLWAJLFTIZAK
YPFXVY4NZBLWAJLFTIZAK
THE TELEGRAPH TRANSMITS
venona_pad_reuse
venona_pad_reuse
stream
{ "type": "keyword", "value": "LIBERTY" }
expert
en
21
21
cipher_museum
2.0
public
null
null
scytale-230
TIPHLHSOEIEORSFAFTTERVAAOTINTROTCEDFAEIEWLTTAAIOITRMTSH
TIPHLHSOEIEORSFAFTTERVAAOTINTROTCEDFAEIEWLTTAAIOITRMTSH
THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS LIFE OR DEATH
scytale
scytale
transposition
{ "type": "integer", "value": 5 }
intermediate
en
55
55
cipher_museum
0.2
public
null
null
cardano-autokey-v2-0380
XCRKAHGKQGMLUFHHWLKFMCH
XCRKAHGKQGMLUFHHWLKFMCH
CARTHAGE MUST BE DESTROYED
cardano_autokey
cardano_autokey
polyalphabetic
{ "type": "keyword", "value": "VENICE" }
advanced
en
23
23
cipher_museum
2.0
public
null
null
arnold-andre-v2-0035
13.1.1 14.2.4 14.3.4 15.1.1 13.1.1 14.2.2 14.3.5 14.1.4 15.1.1 13.1.1 14.5.3 14.1.5 15.1.1 13.1.1 14.4.5 14.4.3 14.5.1 14.4.4 14.4.5 15.1.1
13.1.1 14.2.4 14.3.4 15.1.1 13.1.1 14.2.2 14.3.5 14.1.4 15.1.1 13.1.1 14.5.3 14.1.5 15.1.1 13.1.1 14.4.5 14.4.3 14.5.1 14.4.4 14.4.5 15.1.1
IN GOD WE TRUST
arnold_andre
arnold_andre
codebook
{ "type": "none", "value": null }
expert
en
120
139
cipher_museum
2.0
public
null
null
m209-224
BSZRASNDNESGAXDNIFIOPQLZZXEQYVLFZQRKEOBLWACNVSWQESVLBSPNA
BSZRASNDNESGAXDNIFIOPQLZZXEQYVLFZQRKEOBLWACNVSWQESVLBSPNA
ELEMENTARY MY DEAR WATSON THE GAME IS AFOOT AND THE CRIMINAL IS CLOSE
m209
m209
machine
{ "type": "seed", "value": "MUSEUM" }
expert
en
57
57
cipher_museum
0.2
public
null
null
kryptos-v3-0221
KPFGYGUGKJDRYMWQVWOMR
KPFGYGUGKJDRYMWQVWOMR
THE CASTLE IS SURROUNDED
kryptos
kryptos
polyalphabetic
{ "type": "keyword", "value": "VIRTUAL" }
advanced
en
21
21
cipher_museum
2.0
public
null
null
wheatstone-010
QNTKWEDWOTBPATFBUTMTA
QNTKWEDWOTBPATFBUTMTA
THE PACKAGE IS DELIVERED
wheatstone
wheatstone
polygraphic
{ "type": "keyword", "value": "WHEATSTONE" }
advanced
en
21
21
cipher_museum
0.2
public
null
null
typex-075
FXRLOPQMCIRSRPX
FXRLOPQMCIRSRPX
OPERATION BEGINS
typex
typex
machine
{ "type": "keyword", "value": "BLETCHLEY" }
expert
en
15
15
cipher_museum
0.2
public
null
null
hill-v3-0491
WVTBGYSVMYNBFRPGOANNRORTUUXWMAPMGGWVCMXDVPUUNGJEXNQSYHAUVANGHOFESEWQTKXCNA
WVTBGYSVMYNBFRPGOANNRORTUUXWMAPMGGWVCMXDVPUUNGJEXNQSYHAUVANGHOFESEWQTKXCNA
THE JOURNEY OF A THOUSAND MILES BEGINS WITH A SINGLE STEP AS LAO TZU WROTE LONG AGO IN CHINA
hill
hill
polygraphic
{ "a": 11, "b": 3, "c": 2, "d": 5 }
advanced
en
74
74
cipher_museum
2.0
public
null
null
m209-v2-0395
APAWYSANLEYZYPUUQHN
APAWYSANLEYZYPUUQHN
CODED MESSAGE FOLLOWS
m209
m209
machine
{ "type": "seed", "value": "VICTORY" }
expert
en
19
19
cipher_museum
2.0
public
null
null
caesar-v3-0547
CQN LXVYJBB YXRWCB CADN
CQN LXVYJBB YXRWCB CADN
THE COMPASS POINTS TRUE
caesar
caesar
substitution
{ "type": "shift", "value": 9 }
beginner
en
20
23
cipher_museum
2.0
public
null
null
double-transposition-v3-0166
IBMKTOTTNBIEEATOBNGGOIYFDTARNREERNHUEROHTTDNENTENAFFEFNVLHSRILOIEESSAOAIN
IBMKTOTTNBIEEATOBNGGOIYFDTARNREERNHUEROHTTDNENTENAFFEFNVLHSRILOIEESSAOAIN
THE BATTLE OF BRITAIN RAGED IN THE SKIES ABOVE ENGLAND FOR FOUR MONTHS IN NINETEEN FORTY
double_transposition
double_transposition
transposition
{ "key1": "LIBERTY", "key2": "FREEDOM" }
advanced
en
73
73
cipher_museum
2.0
public
null
null
monoalphabetic-v2-1126
VHH CVTH EQ OEUEORO EJSK SDPRR MVPSQ KJR KB WDELD SDR ARHCVR EJDVAES SDR VNTESVJE VJKSDRP VJO SDR SDEPO SDKQR WDK EJ SDREP KWJ HVJCTVCR VPR LVHHRO LRHSQ EJ KTPQ CVTHQ
VHH CVTH EQ OEUEORO EJSK SDPRR MVPSQ KJR KB WDELD SDR ARHCVR EJDVAES SDR VNTESVJE VJKSDRP VJO SDR SDEPO SDKQR WDK EJ SDREP KWJ HVJCTVCR VPR LVHHRO LRHSQ EJ KTPQ CVTHQ
ALL GAUL IS DIVIDED INTO THREE PARTS ONE OF WHICH THE BELGAE INHABIT THE AQUITANI ANOTHER AND THE THIRD THOSE WHO IN THEIR OWN LANGUAGE ARE CALLED CELTS IN OURS GAULS
monoalphabetic
monoalphabetic
substitution
{ "type": "keyword", "value": "VALOR" }
beginner
en
136
166
cipher_museum
2.0
public
null
null
caesar-v2-1159
IGJHI QJI KTGXUN
IGJHI QJI KTGXUN
TRUST BUT VERIFY
caesar
caesar
substitution
{ "type": "shift", "value": 15 }
beginner
en
14
16
cipher_museum
2.0
public
null
null
cda-0013044
6.5.3 11.3.4 16.3.6 20.4.10 20.4.7 4.5.10 10.2.6 20.4.1 12.2.1 18.6.9 10.2.6 20.4.1 17.4.8 11.6.9 1.1.4 17.1.8 7.4.1 16.1.4 13.4.4 9.2.2 14.6.4 17.1.2 13.2.4 18.4.6 5.6.7 2.1.2 8.6.8 1.1.6 8.2.10 19.3.3 3.5.8 16.1.1 20.2.8 16.4.8 2.1.8 1.4.3 20.1.7 17.4.9 1.6.4 17.3.3 9.1.9 17.5.7 12.1.7 1.5.7 13.6.9 3.2.2 9.1.1 5.5.4 ...
6.5.3 11.3.4 16.3.6 20.4.10 20.4.7 4.5.10 10.2.6 20.4.1 12.2.1 18.6.9 10.2.6 20.4.1 17.4.8 11.6.9 1.1.4 17.1.8 7.4.1 16.1.4 13.4.4 9.2.2 14.6.4 17.1.2 13.2.4 18.4.6 5.6.7 2.1.2 8.6.8 1.1.6 8.2.10 19.3.3 3.5.8 16.1.1 20.2.8 16.4.8 2.1.8 1.4.3 20.1.7 17.4.9 1.6.4 17.3.3 9.1.9 17.5.7 12.1.7 1.5.7 13.6.9 3.2.2 9.1.1 5.5.4 ...
GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF
arnold_andre
arnold_andre
null
{}
hard
en
94
94
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Arnold-André book cipher: coordinates (page.section.word) referencing a shared text.
kryha-v2-0286
PNSFFXNSNQKUCKZIE
PNSFFXNSNQKUCKZIE
NOVUS ORDO SECLORUM
kryha
kryha
machine
{ "type": "keyword", "value": "PRAGUE" }
expert
en
17
17
cipher_museum
2.0
public
null
null
red-type-a-v3-0403
QUGUDLERMYGLUTCEIXJILTEVOWUSINHEGUCGEJYCSECWOWWUMYHREITZUWOACYLHHXOPROKRUBDOYDDEHV
QUGUDLERMYGLUTCEIXJILTEVOWUSINHEGUCGEJYCSECWOWWUMYHREITZUWOACYLHHXOPROKRUBDOYDDEHV
ZERO KNOWLEDGE PROOFS ALLOW ONE PARTY TO PROVE KNOWLEDGE WITHOUT REVEALING THE KNOWLEDGE ITSELF
red_type_a
red_type_a
machine
{ "type": "keyword", "value": "MIKADO" }
advanced
en
82
82
cipher_museum
2.0
public
null
null
aeneas-tacticus-006
16 18 15 3 5 5 4 1 19 16 12 1 14 14 5 4
16 18 15 3 5 5 4 1 19 16 12 1 14 14 5 4
PROCEED AS PLANNED
aeneas_tacticus
aeneas_tacticus
steganography
{ "type": "none", "value": null }
expert
en
24
39
cipher_museum
0.2
public
null
null
cda-0018289
THEDE TECTI VESTZ DIESP ATTEZ NSBEX OREMX KINGX LAIMS GRONZ FELDZ SESAD IGITX EQUEX CEAST HEREP EATIZ GKEYX
THEDE TECTI VESTZ DIESP ATTEZ NSBEX OREMX KINGX LAIMS GRONZ FELDZ SESAD IGITX EQUEX CEAST HEREP EATIZ GKEYX
THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY
commercial_code
commercial_code
null
{}
hard
en
90
90
synthetic_educational
null
null
[ "codebook_frequency", "five_letter_group_analysis" ]
Commercial code: five-letter groups from a codebook, often ending in X or Z.
nihilist-129
56 37 24 56 36 26 36 56 24 83 49 34 63 46 45
56 37 24 56 36 26 36 56 24 83 49 34 63 46 45
MEET AT THE OLD OAK
nihilist
nihilist
fractionation
{ "polybius": "SECRET", "keyword": "AGENTS" }
advanced
en
30
44
cipher_museum
0.2
public
null
null
vigenere-v2-1044
QZFIUHKTIHIDHT
QZFIUHKTIHIDHT
LIBERTY OR DEATH
vigenere
vigenere
polyalphabetic
{ "type": "keyword", "value": "FREEDOM" }
intermediate
en
14
14
cipher_museum
2.0
public
null
null
cda-0020177
ASTRO NGCLA IMNEX DSSTZ ONGEZ IDENC EDONO TCONX USEOX FUSCA TIONW ITHEZ CRYPT IONGO ODEDX CATIO NALTX OLSEX PLAIN THEIX LIMIT SXEEX
ASTRO NGCLA IMNEX DSSTZ ONGEZ IDENC EDONO TCONX USEOX FUSCA TIONW ITHEZ CRYPT IONGO ODEDX CATIO NALTX OLSEX PLAIN THEIX LIMIT SXEEX
A STRONG CLAIM NEEDS STRONG EVIDENCE DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS
commercial_code
commercial_code
null
{}
hard
en
110
110
synthetic_educational
null
null
[ "codebook_frequency", "five_letter_group_analysis" ]
Commercial code: five-letter groups from a codebook, often ending in X or Z.
trifid-vg-0010
WJPAFLDGQNKMLQINCDJTVZTXMLAI+VFZBXKGIAEII+BRFAVZUXGBAXHLATAUYSNJNN
WJPAFLDGQNKMLQINCDJTVZTXMLAI+VFZBXKGIAEII+BRFAVZUXGBAXHLATAUYSNJNN
STAND FIRM AND DO NOT LET YOURSELVES BE BURDENED AGAIN BY A YOKE OF SLAVERY TO SIN
trifid
trifid
fractionation
{ "type": "keyword", "value": "FELIX" }
advanced
en
66
66
cipher_museum
2.0
public
null
null
cda-0022110
GSV ORYIZIB KIVHVIEVH PMLDOVWTV ULI GSV XLNNFMRGB GSV IZRO UVMXV XRKSVI DIRGVH GVCG RM Z ARTAZT KZGGVIM
GSV ORYIZIB KIVHVIEVH PMLDOVWTV ULI GSV XLNNFMRGB GSV IZRO UVMXV XRKSVI DIRGVH GVCG RM Z ARTAZT KZGGVIM
THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN
atbash
atbash
null
{}
hard
en
87
87
synthetic_educational
null
null
[ "self_inverse_check", "frequency_analysis" ]
Atbash maps A↔Z, B↔Y, … and is its own inverse.
cda-0006060
TICHIEAATRAIDEFTTIALIDPCRGYNNNXLHLEETXZGEINMKNRAIFNLNUUKYRIESTSYEFCRETIPREEAEGOTCFDMTCBEPANTEYLXREIWSIGANDSTYTMISIHARELYTPNEVSOXANPRTNZTFMTELHSSDEENODICOHIEEIWX
TICHIEAATRAIDEFTTIALIDPCRGYNNNXLHLEETXZGEINMKNRAIFNLNUUKYRIESTSYEFCRETIPREEAEGOTCFDMTCBEPANTEYLXREIWSIGANDSTYTMISIHARELYTPNEVSOXANPRTNZTFMTELHSSDEENODICOHIEEIWX
THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX SLOWLY
scytale
scytale
null
{ "cols": 5 }
hard
en
160
160
synthetic_educational
null
null
[ "column_count_search", "anagram_recovery" ]
Scytale: Spartan cylinder cipher — wrap text around a rod of fixed diameter.
adfgx-v2-0579
FAADAXDDAXAXDDFDDAGADADDFXAFAXXXDXDFXDADDADDAFXGAAGDXADGDGDGGGXAXFAAAGDGDAXGGXFXAGGXDGGADFFXDXDDAXGGGGAAGXADDDDXFDGDXFGADGXGXFDFXDFGXAAAXAXGFADDXDADGDXAADFDDDXXGFGXDAFXFDDXGXDXDXFGAFGDGAFGFGGAAAXXFAGAGDFAFGFDAAFXDGFGFAXDXFGFDDXFGAXFXFDADAXGDAXFFDDGFFFDDFDFFGFAXGAFDDXDXAFF
FAADAXDDAXAXDDFDDAGADADDFXAFAXXXDXDFXDADDADDAFXGAAGDXADGDGDGGGXAXFAAAGDGDAXGGXFXAGGXDGGADFFXDXDDAXGGGGAAGXADDDDXFDGDXFGADGXGXFDFXDFGXAAAXAXGFADDXDADGDXAADFDDDXXGFGXDAFXFDDXGXDXDXFGAFGDGAFGFGGAAAXXFAGAGDFAFGFDAAFXDGFGFAXDXFGFDDXFGAXFXFDADAXGDAXFFDDGFFFDDFDFFGFAXGAFDDXDXAFF
ALL GAUL IS DIVIDED INTO THREE PARTS ONE OF WHICH THE BELGAE INHABIT THE AQUITANI ANOTHER AND THE THIRD THOSE WHO IN THEIR OWN LANGUAGE ARE CALLED CELTS IN OURS GAULS
adfgx
adfgx
fractionation
{ "polybius": "WISDOM", "columnar": "COURAGE" }
advanced
en
272
272
cipher_museum
2.0
public
null
null
diana-268
ASIESALJPZIZEVE
ASIESALJPZIZEVE
EVACUATE THE BASE
diana
diana
polyalphabetic
{ "type": "keyword", "value": "ENIGMA" }
intermediate
en
15
15
cipher_museum
0.2
public
null
null
kryha-013
KNXTCTYBIAIHWTB
KNXTCTYBIAIHWTB
ENEMY FORCES NEAR
kryha
kryha
machine
{ "type": "keyword", "value": "KRYHA" }
expert
en
15
15
cipher_museum
0.2
public
null
null
cda-0012239
9.5.3 4.2.3 12.4.1 7.4.10 6.1.9 7.3.9 7.5.1 19.5.3 16.3.4 17.3.7 9.5.1 14.3.6 4.5.3 9.1.10 10.4.6 6.1.10 18.3.8 10.4.3 19.1.1 5.2.7 13.3.2 19.5.3 19.1.4 12.6.5 18.4.7 7.6.2 14.3.4 11.5.8 12.1.5 3.1.6 3.4.9
9.5.3 4.2.3 12.4.1 7.4.10 6.1.9 7.3.9 7.5.1 19.5.3 16.3.4 17.3.7 9.5.1 14.3.6 4.5.3 9.1.10 10.4.6 6.1.10 18.3.8 10.4.3 19.1.1 5.2.7 13.3.2 19.5.3 19.1.4 12.6.5 18.4.7 7.6.2 14.3.4 11.5.8 12.1.5 3.1.6 3.4.9
A STRONG CLAIM NEEDS STRONG EVIDENCE
arnold_andre
arnold_andre
null
{}
medium
en
31
31
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Arnold-André book cipher: coordinates (page.section.word) referencing a shared text.
beaufort-v3-0129
RKAOHSZWXGHNREY
RKAOHSZWXGHNREY
CHART THE UNKNOWN
beaufort
beaufort
polyalphabetic
{ "type": "keyword", "value": "TRAFALGAR" }
intermediate
en
15
15
cipher_museum
2.0
public
null
null
geheimschreiber-v2-0271
XAYAKPXAZURFIFENRD
XAYAKPXAZURFIFENRD
CONTACT HAS BEEN MADE
geheimschreiber
geheimschreiber
machine
{ "type": "seed", "value": "GOTHIC" }
expert
en
18
18
cipher_museum
2.0
public
null
null
one-time-pad-v2-0088
CMCXHJYOIWXZZCFDLVVMBVPQFDOOGWMRKWIMKNTVSKUJHXLAAZRREDTHGDCOMWEDQQQDHIWVNGULLBE
CMCXHJYOIWXZZCFDLVVMBVPQFDOOGWMRKWIMKNTVSKUJHXLAAZRREDTHGDCOMWEDQQQDHIWVNGULLBE
CLAUDE SHANNON PROVED THAT THE ONE TIME PAD ACHIEVES PERFECT SECRECY WHEN USED CORRECTLY ONCE
one_time_pad
one_time_pad
stream
{ "type": "pad", "value": "ABCDEFGH (repeating)" }
expert
en
79
79
cipher_museum
2.0
public
null
null
purple-v3-0281
ICEMUPBCKJLBVERXVHMGVBOQAQCPDYRYWQKCWHRXBAHLHZDXEOFYMMYIIBFWIWZEOKCWUXANVTUUCD
ICEMUPBCKJLBVERXVHMGVBOQAQCPDYRYWQKCWHRXBAHLHZDXEOFYMMYIIBFWIWZEOKCWUXANVTUUCD
BLESSED ARE THE MEEK FOR THEY SHALL INHERIT THE EARTH AND THE PEACEMAKERS SHALL BE CALLED SONS
purple
purple
machine
{ "type": "seed", "value": "SAKURA" }
expert
en
78
78
cipher_museum
2.0
public
null
null
hill-105
TNLRZVVFGYITEYVBVGNONJHIYEOJHQGEYHYESDVFHQFTAG
TNLRZVVFGYITEYVBVGNONJHIYEOJHQGEYHYESDVFHQFTAG
I HAVE NOT YET BEGUN TO FIGHT SAID THE CAPTAIN TO THE CREW
hill
hill
polygraphic
{ "a": 3, "b": 3, "c": 2, "d": 7 }
advanced
en
46
46
cipher_museum
0.2
public
null
null
trifid-v2-0142
GFEOJKRPLUFOWH
GFEOJKRPLUFOWH
COVER MY RETREAT
trifid
trifid
fractionation
{ "type": "keyword", "value": "FORTRESS" }
advanced
en
14
14
cipher_museum
2.0
public
null
null
bazeries-050
BPFYPMWJFUCMJNSWPCGFHCJKPMIFYRJPBPNYFPYPPCNCCGYWMJYTPFB
BPFYPMWJFUCMJNSWPCGFHCJKPMIFYRJPBPNYFPYPPCNCCGYWMJYTPFB
THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS LIFE OR DEATH
bazeries
bazeries
transposition
{ "type": "integer", "value": 42 }
advanced
en
55
55
cipher_museum
0.2
public
null
null
kryha-v2-0259
MJUHNOOFEXDADN
MJUHNOOFEXDADN
SIGNAL FIRES LIT
kryha
kryha
machine
{ "type": "keyword", "value": "PRAGUE" }
expert
en
14
14
cipher_museum
2.0
public
null
null
cda-0005017
FBWE LOAP XETV BZXW JHOC HEHY YXLE UCIT IJXW VHTI DRJP TIEA LIOF PFAH IZOK OCQT WKYS WAHF ZRG
FBWE LOAP XETV BZXW JHOC HEHY YXLE UCIT IJXW VHTI DRJP TIEA LIOF PFAH IZOK OCQT WKYS WAHF ZRG
THE ARCHITECTURE SHOULD MAKE MISUSE HARDER A TRANSPARENT TOOL SHOULD SHOW ITS REASONING
autokey
autokey
null
{ "primer": "MUSEUM" }
medium
en
75
75
synthetic_educational
null
null
[ "running_key_analysis", "index_of_coincidence" ]
Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack.
nomenclator-v3-0138
15 12 04 09 18 15 14 19 09 04 05 19 08 15 12 04 19
15 12 04 09 18 15 14 19 09 04 05 19 08 15 12 04 19
OLD IRONSIDES HOLDS
nomenclator
nomenclator
nomenclator
{ "type": "seed", "value": "PALACE" }
expert
en
34
50
cipher_museum
2.0
public
null
null
kl7-v2-0079
HJMMYOLXQDJHHWZPPGFFQMEFRXOCUUZXPWWKQHRLCJUUXUKWDIYMHXJJRMCZWHTYYONLKJZYTVGBANA
HJMMYOLXQDJHHWZPPGFFQMEFRXOCUUZXPWWKQHRLCJUUXUKWDIYMHXJJRMCZWHTYYONLKJZYTVGBANA
NATURE IS WRITTEN IN THE LANGUAGE OF MATHEMATICS AND ITS CHARACTERS ARE TRIANGLES AND CIRCLES
kl7
kl7
machine
{ "type": "seed", "value": "NATO" }
expert
en
79
79
cipher_museum
2.0
public
null
null
running-key-v2-0099
YSFAANEMIYIXSAFHHF
YSFAANEMIYIXSAFHHF
CONTACT HAS BEEN MADE
running_key
running_key
polyalphabetic
{ "type": "text", "value": "Churchill Dunkirk speech" }
intermediate
en
18
18
cipher_museum
2.0
public
null
null
joseon-yeokhak-v3-0259
EHZCZLODOTGPCRPOTYLJPWWZHHZZOLYODZCCJTNZFWOYZEECLGPWMZESLYOMPZYPECLGPWPC
EHZCZLODOTGPCRPOTYLJPWWZHHZZOLYODZCCJTNZFWOYZEECLGPWMZESLYOMPZYPECLGPWPC
TWO ROADS DIVERGED IN A YELLOW WOOD AND SORRY I COULD NOT TRAVEL BOTH AND BE ONE TRAVELER
joseon_yeokhak
joseon_yeokhak
substitution
{ "type": "keyword", "value": "HANGUL" }
beginner
en
72
72
cipher_museum
2.0
public
null
null
chinese-telegraph-v3-0305
5563 4614 4427 4871 5060 5397 4361 5060 5645 5397 4550 5060 4361 4680 5488 5060 4998 4427 4871 5060 5397 4361 4154 4998 4361 5563 4614 5060 5645 5488 4614 4154 4871 5563 4871 5060 5741 4427 5563 4614 4427 4871 5060 5397 4361 5563 4614 5963 4550 5060 4361 5814 4680 5563 4614 4154 4871 4871 5563 4614 4680 4998 4427 4614 ...
5563 4614 4427 4871 5060 5397 4361 5060 5645 5397 4550 5060 4361 4680 5488 5060 4998 4427 4871 5060 5397 4361 4154 4998 4361 5563 4614 5060 5645 5488 4614 4154 4871 5563 4871 5060 5741 4427 5563 4614 4427 4871 5060 5397 4361 5563 4614 5963 4550 5060 4361 5814 4680 5563 4614 4154 4871 4871 5563 4614 4680 4998 4427 4614 ...
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
chinese_telegraph
chinese_telegraph
codebook
{ "type": "additive", "value": "14142" }
expert
en
636
794
cipher_museum
2.0
public
null
null
kryptos-069
CYQMCOWKZIFFCMNBXKFIG
CYQMCOWKZIFFCMNBXKFIG
SUPPLY LINE COMPROMISED
kryptos
kryptos
polyalphabetic
{ "type": "keyword", "value": "PALIMPSEST" }
advanced
en
21
21
cipher_museum
0.2
public
null
null
straddling-checkerboard-v3-0082
953246100025202828292027135282074610701948324203104202128802529134523612882485356706525821848324425123611175169801
953246100025202828292027135282074610701948324203104202128802529134523612882485356706525821848324425123611175169801
CONGRESS SHALL MAKE NO LAW RESPECTING AN ESTABLISHMENT OF RELIGION OR PROHIBITING THE FREE EXERCISE
straddling_checkerboard
straddling_checkerboard
substitution
{ "type": "top_row", "value": "SENTORISCA" }
advanced
en
114
114
cipher_museum
2.0
public
null
null
wallis-cipher-v2-0173
90 67 63 91 90 18 55 76 91 90 53 79 75 44 91 90 40 15 72 61 35 91 90 47 53 91 90 41 20 63 18 27 40 91 90 47 55 76 91 90 74 18 33 63 91 90 85 81 91 90 47 66 41 91 90 25 79 20 91 90 30 54 45 15 77 76 91 90 30 84 61 63 91 90 54 53 91 90 55 85 72 81 33 76 41 91 90 23 84 45 58 91 90 18 91 90 40 77 63 76 88 91
90 67 63 91 90 18 55 76 91 90 53 79 75 44 91 90 40 15 72 61 35 91 90 47 53 91 90 41 20 63 18 27 40 91 90 47 55 76 91 90 74 18 33 63 91 90 85 81 91 90 47 66 41 91 90 25 79 20 91 90 30 54 45 15 77 76 91 90 30 84 61 63 91 90 54 53 91 90 55 85 72 81 33 76 41 91 90 23 84 45 58 91 90 18 91 90 40 77 63 76 88 91
WE ARE SUCH STUFF AS DREAMS ARE MADE ON AND OUR LITTLE LIFE IS ROUNDED WITH A SLEEP
wallis_cipher
wallis_cipher
nomenclator
{ "type": "seed", "value": "ENGLAND" }
expert
en
204
305
cipher_museum
2.0
public
null
null
argenti-154
41 11 62 21 61 28 64 78 88 82 75 11 53 24 28 47 31 78 61 41 11 71 79 75 28 49 82 62 46 38 61 11 53 51 28 47 37 78 75
41 11 62 21 61 28 64 78 88 82 75 11 53 24 28 47 31 78 61 41 11 71 79 75 28 49 82 62 46 38 61 11 53 51 28 47 37 78 75
IT WAS THE BEST OF TIMES IT WAS THE WORST OF TIMES
argenti
argenti
nomenclator
{ "type": "seed", "value": "SECRET" }
expert
en
78
116
cipher_museum
0.2
public
null
null
bazeries-v3-0142
OTYGPYMQYEBUJPQEYEI
OTYGPYMQYEBUJPQEYEI
MEASURE TWICE CUT ONCE
bazeries
bazeries
transposition
{ "type": "integer", "value": 23 }
advanced
en
19
19
cipher_museum
2.0
public
null
null
kl7-v2-0406
FBLMQJXFUULQWGZEM
FBLMQJXFUULQWGZEM
COURAGE IN DARKNESS
kl7
kl7
machine
{ "type": "seed", "value": "ALLIANCE" }
expert
en
17
17
cipher_museum
2.0
public
null
null
cda-0002848
RVTTV SOAQV SYYZO AWAGE BRHQS QCHPY WQXSL QELCG BUENC VLWAA VASGS SAFSI RAGLF WK
RVTTV SOAQV SYYZO AWAGE BRHQS QCHPY WQXSL QELCG BUENC VLWAA VASGS SAFSI RAGLF WK
DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX
porta
porta
null
{ "key": "PATTERN" }
medium
en
67
67
synthetic_educational
null
null
[ "kasiski_examination", "index_of_coincidence" ]
Porta: 13-row table polyalphabetic cipher; reciprocal (encrypt = decrypt).
venona-pad-reuse-v3-0234
WAAER25BQQVLKPCVVA
WAAER25BQQVLKPCVVA
TREASURE BURIED HERE
venona_pad_reuse
venona_pad_reuse
stream
{ "type": "keyword", "value": "FREEDOM" }
expert
en
18
18
cipher_museum
2.0
public
null
null
chaocipher-v3-0441
WOOEXCGMYPKLNXJ
WOOEXCGMYPKLNXJ
CHART THE UNKNOWN
chaocipher
chaocipher
machine
{ "type": "keyword", "value": "TRIUMPH" }
advanced
en
15
15
cipher_museum
2.0
public
null
null
cda-0015159
THEBZ FIDCI PHERC OMBIN ESAPO LYBIU SSQUA REWIT HTRAN SPOSI TIONA SCYTX LEISA RODUS EDBYS PARTA NSTOE NCRYP TMESS AGESZ RUTEF ORCEZ ORKSO NLYWH ENTHZ KEYSX ACEIX SMALZ
THEBZ FIDCI PHERC OMBIN ESAPO LYBIU SSQUA REWIT HTRAN SPOSI TIONA SCYTX LEISA RODUS EDBYS PARTA NSTOE NCRYP TMESS AGESZ RUTEF ORCEZ ORKSO NLYWH ENTHZ KEYSX ACEIX SMALZ
THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL
commercial_code
commercial_code
null
{}
hard
en
140
140
synthetic_educational
null
null
[ "codebook_frequency", "five_letter_group_analysis" ]
Commercial code: five-letter groups from a codebook, often ending in X or Z.
fractionated-morse-v2-0403
NIRSBVERXFNTAADVL
NIRSBVERXFNTAADVL
TRUST BUT VERIFY
fractionated_morse
fractionated_morse
fractionation
{ "type": "keyword", "value": "FREEDOM" }
advanced
en
17
17
cipher_museum
2.0
public
null
null
cda-0021163
--. .-. --- -. ... ..-. . .-.. -.. / ..- ... . ... / .- / -.. .. --. .. - / ... . --.- ..- . -. -.-. . / .- ... / - .... . / .-. . .--. . .- - .. -. --. / -.- . -.-- / .--. . . .-. / .-. . ...- .. . .-- / .- -. -.. / .-. . .--. .-. --- -.. ..- -.-. .. -... .. .-.. .. - -.-- / -- .- - - . .-. / .. -. / .-. . ... . .- .-...
--. .-. --- -. ... ..-. . .-.. -.. / ..- ... . ... / .- / -.. .. --. .. - / ... . --.- ..- . -. -.-. . / .- ... / - .... . / .-. . .--. . .- - .. -. --. / -.- . -.-- / .--. . . .-. / .-. . ...- .. . .-- / .- -. -.. / .-. . .--. .-. --- -.. ..- -.-. .. -... .. .-.. .. - -.-- / -- .- - - . .-. / .. -. / .-. . ... . .- .-...
GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES
morse_code
morse_code
null
{}
hard
en
133
133
synthetic_educational
null
null
[ "symbol_decode", "frequency_analysis" ]
Morse code: dots and dashes; word-separated by / symbol.
kryptos-v2-0188
UUTTVFFSGEIWZGQUTHRKBOHDTDJSHHFLOVQXATLOPGBVTWVBUSKSHYVUQHZLFFGWIUNUKNBTKLYFB
UUTTVFFSGEIWZGQUTHRKBOHDTDJSHHFLOVQXATLOPGBVTWVBUSKSHYVUQHZLFFGWIUNUKNBTKLYFB
THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME LIE DOWN IN GREEN PASTURES BY STILL WATERS
kryptos
kryptos
polyalphabetic
{ "type": "keyword", "value": "LANGLEY" }
advanced
en
77
77
cipher_museum
2.0
public
null
null
joseon-yeokhak-v3-0206
HVSAOBVOHHOBDFCXSQHPFCIUVHHCUSHVSFHVSUFSOHSGHGQWSBHWTWQAWBRGCTHVSHKSBHWSHVQSBHIFMWBOFOQSHCPIWZRHVSOHCAWQPCAPPSTCFSBONWUSFAOBMQCIZRRCGCHVSSTTCFHQVOBUSRHVSKCFZRTCFSJSF
HVSAOBVOHHOBDFCXSQHPFCIUVHHCUSHVSFHVSUFSOHSGHGQWSBHWTWQAWBRGCTHVSHKSBHWSHVQSBHIFMWBOFOQSHCPIWZRHVSOHCAWQPCAPPSTCFSBONWUSFAOBMQCIZRRCGCHVSSTTCFHQVOBUSRHVSKCFZRTCFSJSF
THE MANHATTAN PROJECT BROUGHT TOGETHER THE GREATEST SCIENTIFIC MINDS OF THE TWENTIETH CENTURY IN A RACE TO BUILD THE ATOMIC BOMB BEFORE NAZI GERMANY COULD DO SO THE EFFORT CHANGED THE WORLD FOREVER
joseon_yeokhak
joseon_yeokhak
substitution
{ "type": "keyword", "value": "JOSEON" }
beginner
en
165
165
cipher_museum
2.0
public
null
null
lorenz-v3-0187
THEBIRTHDAYPARADOXSHOWSRHATCOLLISIONSINHASHFUNCTIONSOCAURFARSOONERTHANEXPECTED
THEBIRTHDAYPARADOXSHOWSRHATCOLLISIONSINHASHFUNCTIONSOCAURFARSOONERTHANEXPECTED
THE BIRTHDAY PARADOX SHOWS THAT COLLISIONS IN HASH FUNCTIONS OCCUR FAR SOONER THAN EXPECTED
lorenz
lorenz
machine
{ "type": "seed", "value": "FISH" }
expert
en
78
78
cipher_museum
2.0
public
null
null
kama-sutra-170
VMY UWV FO RUW LZ FO TLVUI LHDFWVUGXY VF VMY ZVUVY LV LZ ILOY FW PYUVM
VMY UWV FO RUW LZ FO TLVUI LHDFWVUGXY VF VMY ZVUVY LV LZ ILOY FW PYUVM
THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS LIFE OR DEATH
kama_sutra
kama_sutra
substitution
{ "type": "keyword", "value": "SECRET" }
intermediate
en
55
70
cipher_museum
0.2
public
null
null
kl7-003
WUMKTXZKUSQWMHLXJ
WUMKTXZKUSQWMHLXJ
THE EAGLE HAS LANDED
kl7
kl7
machine
{ "type": "seed", "value": "TSEC" }
expert
en
17
17
cipher_museum
0.2
public
null
null
cda-0016899
ASCYT ALEIX ARODZ SEDBX SPARX ANSTX ENCRZ PTMEX SAGES DONOT CONFU SEOBF USCAX IONWI THENC RYPTI ONROU TECIP HERSR EADAG RIDIX APREX CRIBE DGEOX ETRIC PATTE RNPUX LICIZ FRASX RUCTZ REDEX ERVES CAREF ULDES IGNCE RTAIX LYCDX
ASCYT ALEIX ARODZ SEDBX SPARX ANSTX ENCRZ PTMEX SAGES DONOT CONFU SEOBF USCAX IONWI THENC RYPTI ONROU TECIP HERSR EADAG RIDIX APREX CRIBE DGEOX ETRIC PATTE RNPUX LICIZ FRASX RUCTZ REDEX ERVES CAREF ULDES IGNCE RTAIX LYCDX
A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN CERTAINLY
commercial_code
commercial_code
null
{}
hard
en
185
185
synthetic_educational
null
null
[ "codebook_frequency", "five_letter_group_analysis" ]
Commercial code: five-letter groups from a codebook, often ending in X or Z.
cda-0016913
18.3.4 12.47.8 17.6.9 6.27.11 9.50.8 3.48.10 5.23.4 1.3.9 16.3.2 5.50.8 18.42.15 19.10.13 6.23.11 20.11.6 5.4.6 13.41.11 4.20.8 4.49.14 14.17.9 17.23.10 8.32.6 7.19.12 19.39.5 15.40.2 15.41.1 13.16.14 19.31.12 2.15.11 9.16.14 16.36.11 6.40.14 12.45.3 1.46.4 9.39.3 5.35.11 13.25.13 15.30.13 17.16.3 20.42.4 18.22.14 14.3...
18.3.4 12.47.8 17.6.9 6.27.11 9.50.8 3.48.10 5.23.4 1.3.9 16.3.2 5.50.8 18.42.15 19.10.13 6.23.11 20.11.6 5.4.6 13.41.11 4.20.8 4.49.14 14.17.9 17.23.10 8.32.6 7.19.12 19.39.5 15.40.2 15.41.1 13.16.14 19.31.12 2.15.11 9.16.14 16.36.11 6.40.14 12.45.3 1.46.4 9.39.3 5.35.11 13.25.13 15.30.13 17.16.3 20.42.4 18.22.14 14.3...
DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS
book_cipher
book_cipher
null
{}
hard
en
94
94
synthetic_educational
null
null
[ "book_cipher_attack", "triple_index_search" ]
Book cipher: coordinates (page.line.word) referencing a shared document.
one-time-pad-v3-0111
SDEIMRBMICKFRBT
SDEIMRBMICKFRBT
CHART THE UNKNOWN
one_time_pad
one_time_pad
stream
{ "type": "pad", "value": "QWERTY (repeating)" }
expert
en
15
15
cipher_museum
2.0
public
null
null
stager-route-v3-0266
TSATHEOUAOTNEHEETHURRBSSOSFLIRTSABIRENEAOGHMRSDFTHOSUSDTYILNORXXEFSESOUTFTYYX
TSATHEOUAOTNEHEETHURRBSSOSFLIRTSABIRENEAOGHMRSDFTHOSUSDTYILNORXXEFSESOUTFTYYX
THE LIGHT YOU SEE FROM DISTANT STARS LEFT THOSE SUNS THOUSANDS OF YEARS BEFORE YOUR BIRTH
stager_route
stager_route
transposition
{ "type": "integer", "value": 11 }
expert
en
77
77
cipher_museum
2.0
public
null
null
commercial-code-030
ZUZUZ WAZUZ BAZUZ PAZUZ PAZUZ GEZUZ XUZUZ TABAB ZUZUZ FAZUZ BAZUZ DEZUZ RAZUZ XUZUZ
ZUZUZ WAZUZ BAZUZ PAZUZ PAZUZ GEZUZ XUZUZ TABAB ZUZUZ FAZUZ BAZUZ DEZUZ RAZUZ XUZUZ
RALLY AT DAWN
commercial_code
commercial_code
codebook
{ "type": "none", "value": null }
expert
en
70
83
cipher_museum
0.2
public
null
null
cda-0002073
AUDDWM KUKXNPE OM GUMWKMDJD RGE BNSLFHLB JVLZ GIGYEY ULJGB CMIHOD ANZO KASME NBS JYW UIHXB KZCIKQI YUTWABZI
AUDDWM KUKXNPE OM GUMWKMDJD RGE BNSLFHLB JVLZ GIGYEY ULJGB CMIHOD ANZO KASME NBS JYW UIHXB KZCIKQI YUTWABZI
ATBASH ENCODES BY REVERSING THE ALPHABET ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE TOMORROW
trithemius
trithemius
null
{}
hard
en
91
91
synthetic_educational
null
null
[ "progressive_shift_detection", "frequency_analysis" ]
Trithemius: progressive Caesar (shift = letter position); no key needed.
m209-v3-0063
QRYYBIIXXCTTWZAZQMAZMRDNZXCPPXWIZRONQBRCFAYFAXZKTQKYAXMXBKZJJLYECPNRCURHDMTOQ
QRYYBIIXXCTTWZAZQMAZMRDNZXCPPXWIZRONQBRCFAYFAXZKTQKYAXMXBKZJJLYECPNRCURHDMTOQ
ON D DAY THE ALLIED FORCES LANDED ON FIVE NORMANDY BEACHES IN THE GREATEST SEABORNE INVASION
m209
m209
machine
{ "type": "seed", "value": "ARMY" }
expert
en
77
77
cipher_museum
2.0
public
null
null
adfgvx-v3-0142
DVAFFAGGGFGGAXDXFFAFAFGGDGDDADGVGGXAXA
DVAFFAGGGFGGAXDXFFAFAFGGDGDDADGVGGXAXA
MEASURE TWICE CUT ONCE
adfgvx
adfgvx
fractionation
{ "polybius": "LIBERTY", "columnar": "FREEDOM" }
advanced
en
38
38
cipher_museum
2.0
public
null
null
alberti-disk-v2-0308
IJPLXLOBDRFYTNXBCIAXKRCXAHGWSNQIFVIELXEYLMATOXOCBPMUHQVGBCRAVZAZMRX
IJPLXLOBDRFYTNXBCIAXKRCXAHGWSNQIFVIELXEYLMATOXOCBPMUHQVGBCRAVZAZMRX
I KNOW NOT WHAT COURSE OTHERS MAY TAKE BUT AS FOR ME GIVE ME LIBERTY OR GIVE ME DEATH
alberti_disk
alberti_disk
disk
{ "type": "integer", "value": 8 }
expert
en
67
67
cipher_museum
2.0
public
null
null
confederate-vigenere-v2-0342
PIOGUXMBVSIAZWXVEXAFHPBIHHLXNXHZEMVFQMPIUTBBXHZPEIUMAMGRLBLFBBEWQDAMPIOQMXIV
PIOGUXMBVSIAZWXVEXAFHPBIHHLXNXHZEMVFQMPIUTBBXHZPEIUMAMGRLBLFBBEWQDAMPIOQMXIV
MARY QUEEN OF SCOTS WAS BEHEADED AFTER HER CIPHER LETTERS WERE DECODED BY THOMAS PHELIPPES
confederate_vigenere
confederate_vigenere
polyalphabetic
{ "type": "keyword", "value": "DIXIE" }
intermediate
en
76
76
cipher_museum
2.0
public
null
null
playfair-271
DPLSXEOQAHQNKANVCOGPPYTILSVINUGECYLSPUKUMIOQZDHPDOKGIGNXFO
DPLSXEOQAHQNKANVCOGPPYTILSVINUGECYLSPUKUMIOQZDHPDOKGIGNXFO
IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT
playfair
playfair
polygraphic
{ "type": "keyword", "value": "PLAYFAIR" }
intermediate
en
58
58
cipher_museum
0.2
public
null
null