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walkowiak

hypovanadous

ephemeromorphic

overproduction

denitrogenate

isolines

perihernial

anubing

malmber

parentheses

overstitch

subcommit

lehrbachite

gerentesque

semicoagulated

crimso

tendentiously

contrariaque


Caesar cipher

Caesar cipher, is one of the simplest and most widely known encryption techniques. The transformation can be represented by aligning two alphabets, the cipher alphabet is the plain alphabet rotated left or right by some number of positions.

When encrypting, a person looks up each letter of the message in the 'plain' line and writes down the corresponding letter in the 'cipher' line. Deciphering is done in reverse.
The encryption can also be represented using modular arithmetic by first transforming the letters into numbers, according to the scheme, A = 0, B = 1,..., Z = 25. Encryption of a letter x by a shift n can be described mathematically as

Plaintext: refire
cipher variations:
sfgjsf tghktg uhiluh vijmvi wjknwj
xkloxk ylmpyl zmnqzm anoran bopsbo
cpqtcp dqrudq ersver fstwfs gtuxgt
huvyhu ivwziv jwxajw kxybkx lyzcly
mzadmz nabena obcfob pcdgpc qdehqd

Decryption is performed similarly,

(There are different definitions for the modulo operation. In the above, the result is in the range 0...25. I.e., if x+n or x-n are not in the range 0...25, we have to subtract or add 26.)
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Atbash Cipher

Atbash is an ancient encryption system created in the Middle East. It was originally used in the Hebrew language.
The Atbash cipher is a simple substitution cipher that relies on transposing all the letters in the alphabet such that the resulting alphabet is backwards.
The first letter is replaced with the last letter, the second with the second-last, and so on.
An example plaintext to ciphertext using Atbash:
Plain: refire
Cipher: ivuriv

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Baconian Cipher

To encode a message, each letter of the plaintext is replaced by a group of five of the letters 'A' or 'B'. This replacement is done according to the alphabet of the Baconian cipher, shown below.
a   AAAAA   g    AABBA     m    ABABB   s    BAAAB     y    BABBA
b   AAAAB   h    AABBB     n    ABBAA   t    BAABA     z    BABBB
c   AAABA   i    ABAAA     o    ABBAB   u    BAABB 
d   AAABB   j    BBBAA     p    ABBBA   v    BBBAB
e   AABAA   k    ABAAB     q    ABBBB   w    BABAA
f   AABAB   l    ABABA     r    BAAAA   x    BABAB

Plain: refire
Cipher: BAAAA AABAA AABAB ABAAA BAAAA AABAA

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Affine Cipher
In the affine cipher the letters of an alphabet of size m are first mapped to the integers in the range 0..m - 1. It then uses modular arithmetic to transform the integer that each plaintext letter corresponds to into another integer that correspond to a ciphertext letter. The encryption function for a single letter is

where modulus m is the size of the alphabet and a and b are the key of the cipher. The value a must be chosen such that a and m are coprime.
Considering the specific case of encrypting messages in English (i.e. m = 26), there are a total of 286 non-trivial affine ciphers, not counting the 26 trivial Caesar ciphers. This number comes from the fact there are 12 numbers that are coprime with 26 that are less than 26 (these are the possible values of a). Each value of a can have 26 different addition shifts (the b value) ; therefore, there are 12*26 or 312 possible keys.
Plaintext: refire
cipher variations:
sfgjsfanqzanivapivqdkfqdyluvylgtelgtwjyrwjeriher
mzsxmzuhcnuhcpmdcpkxwtkxtghktgborabojwbqjwrelgre
zmvwzmhufmhuxkzsxkfsjifsnatynavidovidqnedqlyxuly
uhiluhcpsbcpkxcrkxsfmhsfanwxanivgnivylatylgtkjgt
obuzobwjepwjerofermzyvmzvijmvidqtcdqlydslytgnitg
boxybojwhojwzmbuzmhulkhupcvapcxkfqxkfspgfsnazwna
wjknwjerudermzetmzuhojuhcpyzcpkxipkxancvanivmliv
qdwbqdylgrylgtqhgtobaxobxkloxkfsvefsnafunavipkvi
dqzadqlyjqlybodwbojwnmjwrexcrezmhszmhurihupcbypc
ylmpylgtwfgtobgvobwjqlwjerabermzkrmzcpexcpkxonkx
sfydsfanitanivsjivqdczqdzmnqzmhuxghupchwpcxkrmxk
fsbcfsnalsnadqfydqlypolytgzetgbojubojwtkjwredare
anoranivyhivqdixqdylsnylgtcdgtobmtobergzermzqpmz
uhafuhcpkvcpkxulkxsfebsfbopsbojwzijwrejyrezmtozm
hudehupcnupcfshafsnarqnavibgvidqlwdqlyvmlytgfctg
cpqtcpkxajkxsfkzsfanupanivefivqdovqdgtibgtobsrob
wjchwjermxermzwnmzuhgduhdqrudqlybklytglatgbovqbo
jwfgjwrepwrehujchupctspcxkdixkfsnyfsnaxonavihevi
ersvermzclmzuhmbuhcpwrcpkxghkxsfqxsfivkdivqdutqd
ylejylgtozgtobypobwjifwjfstwfsnadmnavincvidqxsdq
lyhilytgrytgjwlejwrevurezmfkzmhupahupczqpcxkjgxk
gtuxgtobenobwjodwjerytermzijmzuhszuhkxmfkxsfwvsf
anglanivqbivqdarqdylkhylhuvyhupcfopcxkpexkfszufs
najknavitavilynglytgxwtgbohmbojwrcjwrebsrezmlizm
ivwzivqdgpqdylqfylgtavgtobklobwjubwjmzohmzuhyxuh
cpincpkxsdkxsfctsfanmjanjwxajwrehqrezmrgzmhubwhu
pclmpcxkvcxknapinavizyvidqjodqlytelytgdutgbonkbo
kxybkxsfirsfanshanivcxivqdmnqdylwdylobqjobwjazwj
erkpermzufmzuhevuhcpolcplyzclytgjstgbotibojwdyjw
renorezmxezmpcrkpcxkbaxkfslqfsnavgnavifwvidqpmdq
mzadmzuhktuhcpujcpkxezkxsfopsfanyfanqdslqdylcbyl
gtmrgtobwhobwjgxwjerqnernabenaviluvidqvkdqlyfaly
tgpqtgbozgboretmrezmdczmhunshupcxipcxkhyxkfsrofs
obcfobwjmvwjerwlermzgbmzuhqruhcpahcpsfunsfanedan
ivotivqdyjqdylizylgtspgtpcdgpcxknwxkfsxmfsnahcna
virsvidqbidqtgvotgbofebojwpujwrezkrezmjazmhutqhu
qdehqdyloxylgtyngtobidobwjstwjercjeruhwpuhcpgfcp
kxqvkxsfalsfankbanivurivrefirezmpyzmhuzohupcjepc
xktuxkfsdkfsvixqvidqhgdqlyrwlytgbmtgbolcbojwvsjw

The decryption function is

where a - 1 is the modular multiplicative inverse of a modulo m. I.e., it satisfies the equation

The multiplicative inverse of a only exists if a and m are coprime. Hence without the restriction on a decryption might not be possible. It can be shown as follows that decryption function is the inverse of the encryption function,

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ROT13 Cipher
Applying ROT13 to a piece of text merely requires examining its alphabetic characters and replacing each one by the letter 13 places further along in the alphabet, wrapping back to the beginning if necessary. A becomes N, B becomes O, and so on up to M, which becomes Z, then the sequence continues at the beginning of the alphabet: N becomes A, O becomes B, and so on to Z, which becomes M. Only those letters which occur in the English alphabet are affected; numbers, symbols, whitespace, and all other characters are left unchanged. Because there are 26 letters in the English alphabet and 26 = 2 * 13, the ROT13 function is its own inverse:

ROT13(ROT13(x)) = x for any basic Latin-alphabet text x


An example plaintext to ciphertext using ROT13:

Plain: refire
Cipher: ersver

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Polybius Square

A Polybius Square is a table that allows someone to translate letters into numbers. To give a small level of encryption, this table can be randomized and shared with the recipient. In order to fit the 26 letters of the alphabet into the 25 spots created by the table, the letters i and j are usually combined.
1 2 3 4 5
1 A B C D E
2 F G H I/J K
3 L M N O P
4 Q R S T U
5 V W X Y Z

Basic Form:
Plain: refire
Cipher: 245112422451

Extended Methods:
Method #1

Plaintext: refire
method variations:
wklowkbpqtbpguvygumzadmz

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
r e f i r e 
2 5 1 4 2 5 
4 1 2 2 4 1 
They are then read out in rows:
251425412241
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: refire
Cipher: wqwdgd

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Method #3

Plaintext: refire
method variations:
yargyf argyfy rgyfya
gyfyar yfyarg fyargy

Read more ...[RUS] , [EN]

 

Permutation Cipher
In classical cryptography, a permutation cipher is a transposition cipher in which the key is a permutation. To apply a cipher, a random permutation of size E is generated (the larger the value of E the more secure the cipher). The plaintext is then broken into segments of size E and the letters within that segment are permuted according to this key.
In theory, any transposition cipher can be viewed as a permutation cipher where E is equal to the length of the plaintext; this is too cumbersome a generalisation to use in actual practice, however.
The idea behind a permutation cipher is to keep the plaintext characters unchanged, butalter their positions by rearrangement using a permutation
This cipher is defined as:
Let m be a positive integer, and K consist of all permutations of {1,...,m}
For a key (permutation) , define:
The encryption function
The decryption function
A small example, assuming m = 6, and the key is the permutation :

The first row is the value of i, and the second row is the corresponding value of (i)
The inverse permutation, is constructed by interchanging the two rows, andrearranging the columns so that the first row is in increasing order, Therefore, is:

Total variation formula:

e = 2,718281828 , n - plaintext length

Plaintext: refire

all 720 cipher variations:
refire refier refrie refrei referi refeir reifre reifer reirfe reiref reierf
reiefr rerife rerief rerfie rerfei rerefi rereif reeirf reeifr reerif reerfi
reefri reefir rfeire rfeier rferie rferei rfeeri rfeeir rfiere rfieer rfiree
rfiree rfiere rfieer rfriee rfriee rfreie rfreei rfreei rfreie rfeire rfeier
rferie rferei rfeeri rfeeir rifere rifeer rifree rifree rifere rifeer riefre
riefer rierfe rieref rieerf rieefr rirefe rireef rirfee rirfee rirefe rireef
rieerf rieefr rieref rierfe riefre riefer rrfiee rrfiee rrfeie rrfeei rrfeei
rrfeie rrifee rrifee rriefe rrieef rrieef rriefe rreife rreief rrefie rrefei
rreefi rreeif rreief rreife rreeif rreefi rrefei rrefie refire refier refrie
refrei referi refeir reifre reifer reirfe reiref reierf reiefr rerife rerief
rerfie rerfei rerefi rereif reeirf reeifr reerif reerfi reefri reefir erfire
erfier erfrie erfrei erferi erfeir erifre erifer erirfe eriref erierf eriefr
errife errief errfie errfei errefi erreif ereirf ereifr ererif ererfi erefri
erefir efrire efrier efrrie efrrei efreri efreir efirre efirer efirre efirer
efierr efierr efrire efrier efrrie efrrei efreri efreir efeirr efeirr eferir
eferri eferri eferir eifrre eifrer eifrre eifrer eiferr eiferr eirfre eirfer
eirrfe eirref eirerf eirefr eirrfe eirref eirfre eirfer eirefr eirerf eierrf
eierfr eierrf eierfr eiefrr eiefrr erfire erfier erfrie erfrei erferi erfeir
erifre erifer erirfe eriref erierf eriefr errife errief errfie errfei errefi
erreif ereirf ereifr ererif ererfi erefri erefir eefirr eefirr eefrir eefrri
eefrri eefrir eeifrr eeifrr eeirfr eeirrf eeirrf eeirfr eerifr eerirf eerfir
eerfri eerrfi eerrif eerirf eerifr eerrif eerrfi eerfri eerfir ferire ferier
ferrie ferrei fereri fereir feirre feirer feirre feirer feierr feierr ferire
ferier ferrie ferrei fereri fereir feeirr feeirr feerir feerri feerri feerir
freire freier frerie frerei freeri freeir friere frieer friree friree friere
frieer frriee frriee frreie frreei frreei frreie freire freier frerie frerei
freeri freeir firere fireer firree firree firere fireer fierre fierer fierre
fierer fieerr fieerr firere fireer firree firree firere fireer fieerr fieerr
fierer fierre fierre fierer frriee frriee frreie frreei frreei frreie friree
friree friere frieer frieer friere freire freier frerie frerei freeri freeir
freier freire freeir freeri frerei frerie ferire ferier ferrie ferrei fereri
fereir feirre feirer feirre feirer feierr feierr ferire ferier ferrie ferrei
fereri fereir feeirr feeirr feerir feerri feerri feerir iefrre iefrer iefrre
iefrer ieferr ieferr ierfre ierfer ierrfe ierref iererf ierefr ierrfe ierref
ierfre ierfer ierefr iererf ieerrf ieerfr ieerrf ieerfr ieefrr ieefrr iferre
iferer iferre iferer ifeerr ifeerr ifrere ifreer ifrree ifrree ifrere ifreer
ifrree ifrree ifrere ifreer ifreer ifrere iferre iferer iferre iferer ifeerr
ifeerr irfere irfeer irfree irfree irfere irfeer irefre irefer irerfe ireref
ireerf ireefr irrefe irreef irrfee irrfee irrefe irreef ireerf ireefr ireref
irerfe irefre irefer irfree irfree irfere irfeer irfeer irfere irrfee irrfee
irrefe irreef irreef irrefe irerfe ireref irefre irefer ireefr ireerf ireref
irerfe ireerf ireefr irefer irefre iefrre iefrer iefrre iefrer ieferr ieferr
ierfre ierfer ierrfe ierref iererf ierefr ierrfe ierref ierfre ierfer ierefr
iererf ieerrf ieerfr ieerrf ieerfr ieefrr ieefrr refire refier refrie refrei
referi refeir reifre reifer reirfe reiref reierf reiefr rerife rerief rerfie
rerfei rerefi rereif reeirf reeifr reerif reerfi reefri reefir rfeire rfeier
rferie rferei rfeeri rfeeir rfiere rfieer rfiree rfiree rfiere rfieer rfriee
rfriee rfreie rfreei rfreei rfreie rfeire rfeier rferie rferei rfeeri rfeeir
rifere rifeer rifree rifree rifere rifeer riefre riefer rierfe rieref rieerf
rieefr rirefe rireef rirfee rirfee rirefe rireef rieerf rieefr rieref rierfe
riefre riefer rrfiee rrfiee rrfeie rrfeei rrfeei rrfeie rrifee rrifee rriefe
rrieef rrieef rriefe rreife rreief rrefie rrefei rreefi rreeif rreief rreife
rreeif rreefi rrefei rrefie refire refier refrie refrei referi refeir reifre
reifer reirfe reiref reierf reiefr rerife rerief rerfie rerfei rerefi rereif
reeirf reeifr reerif reerfi reefri reefir eefirr eefirr eefrir eefrri eefrri
eefrir eeifrr eeifrr eeirfr eeirrf eeirrf eeirfr eerifr eerirf eerfir eerfri
eerrfi eerrif eerirf eerifr eerrif eerrfi eerfri eerfir efeirr efeirr eferir
eferri eferri eferir efierr efierr efirer efirre efirre efirer efrier efrire
efreir efreri efrrei efrrie efrire efrier efrrie efrrei efreri efreir eiferr
eiferr eifrer eifrre eifrre eifrer eiefrr eiefrr eierfr eierrf eierrf eierfr
eirefr eirerf eirfer eirfre eirrfe eirref eirerf eirefr eirref eirrfe eirfre
eirfer erfier erfire erfeir erferi erfrei erfrie erifer erifre eriefr erierf
eriref erirfe ereifr ereirf erefir erefri ererfi ererif errief errife erreif
errefi errfei errfie erfire erfier erfrie erfrei erferi erfeir erifre erifer
erirfe eriref erierf eriefr errife errief errfie errfei errefi erreif ereirf
ereifr ererif ererfi erefri erefir

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