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microb

maneuverer

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peichev

fentinacetate

spindly

pleurenchyma

monserrat

dehiscavissem

itatque

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neuroptera

papadakis

postscapularis

boisterousness

concer

exponent

hutzler


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: dippel
cipher variations:
ejqqfm fkrrgn glssho hmttip inuujq
jovvkr kpwwls lqxxmt mryynu nszzov
otaapw pubbqx qvccry rwddsz sxeeta
tyffub uzggvc vahhwd wbiixe xcjjyf
ydkkzg zellah afmmbi bgnncj choodk

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: dippel
Cipher: wrkkvo

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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: dippel
Cipher: AAABB ABAAA ABBBA ABBBA AABAA ABABA

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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: dippel
cipher variations:
ejqqfmkzuuniqpyyvewfccdacvgglwilkktsurssjkahwwrg
gxaazcmneehysdiipuytmmxqfkrrgnlavvojrqzzwfxgddeb
dwhhmxjmllutvsttklbixxshhybbadnoffiztejjqvzunnyr
glsshombwwpksraaxgyheefcexiinyknmmvuwtuulmcjyyti
izccbeopggjaufkkrwavoozshmttipncxxqltsbbyhziffgd
fyjjozlonnwvxuvvmndkzzujjaddcfpqhhkbvgllsxbwppat
inuujqodyyrmutccziajgghegzkkpampooxwyvwwnoelaavk
kbeedgqriilcwhmmtycxqqbujovvkrpezzsnvuddajbkhhif
hallqbnqppyxzwxxopfmbbwllcffehrsjjmdxinnuzdyrrcv
kpwwlsqfaatowveebkcliijgibmmrcorqqzyaxyypqgnccxm
mdggfistkkneyjoovaezssdwlqxxmtrgbbupxwffcldmjjkh
jcnnsdpsrrazbyzzqrhoddynnehhgjtullofzkppwbfattex
mryynushccvqyxggdmenkklikdooteqtssbaczaarsipeezo
ofiihkuvmmpgalqqxcgbuufynszzovtiddwrzyhhenfollmj
leppufruttcbdabbstjqffappgjjilvwnnqhbmrrydhcvvgz
otaapwujeexsaziifogpmmnkmfqqvgsvuudcebcctukrggbq
qhkkjmwxooricnsszeidwwhapubbqxvkffytbajjgphqnnol
ngrrwhtwvvedfcdduvlshhcrrillknxyppsjdottafjexxib
qvccrywlggzucbkkhqiroopmohssxiuxwwfegdeevwmtiids
sjmmloyzqqtkepuubgkfyyjcrwddszxmhhavdcllirjsppqn
pittyjvyxxgfheffwxnujjettknnmpzarrulfqvvchlgzzkd
sxeetayniibwedmmjsktqqroqjuuzkwzyyhgifggxyovkkfu
uloonqabssvmgrwwdimhaaletyffubzojjcxfennktlurrsp
rkvvalxazzihjghhyzpwllgvvmpporbcttwnhsxxejnibbmf
uzggvcapkkdygfoolumvsstqslwwbmybaajikhiizaqxmmhw
wnqqpscduuxoityyfkojccngvahhwdbqllezhgppmvnwttur
tmxxcnzcbbkjlijjabrynnixxorrqtdevvypjuzzglpkddoh
wbiixecrmmfaihqqnwoxuuvsunyydoadcclkmjkkbcszoojy
ypssruefwwzqkvaahmqleepixcjjyfdsnngbjirroxpyvvwt
vozzepbeddmlnkllcdtappkzzqttsvfgxxarlwbbinrmffqj
ydkkzgetoohckjsspyqzwwxuwpaafqcfeenmolmmdeubqqla
aruutwghyybsmxccjosnggrkzellahfuppidlkttqzraxxyv
xqbbgrdgffonpmnnefvcrrmbbsvvuxhizzctnyddkptohhsl
afmmbigvqqjemluurasbyyzwyrcchsehggpoqnoofgwdssnc
ctwwvyijaaduozeelqupiitmbgnncjhwrrkfnmvvsbtczzax
zsdditfihhqproppghxettodduxxwzjkbbevpaffmrvqjjun
choodkixsslgonwwtcudaabyateejugjiirqspqqhiyfuupe
evyyxaklccfwqbggnswrkkvodippeljyttmhpoxxudvebbcz
buffkvhkjjsrtqrrijzgvvqffwzzyblmddgxrchhotxsllwp

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: dippel
Cipher: qvccry

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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: dippel
Cipher: 414253535113

Extended Methods:
Method #1

Plaintext: dippel
method variations:
iouukqotzzpvtyeeuaydkkzf

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
d i p p e l 
4 4 5 5 5 1 
1 2 3 3 1 3 
They are then read out in rows:
445551123313
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: dippel
Cipher: tzefnl

Read more ...
Method #3

Plaintext: dippel
method variations:
qwxxas wxxasq xxasqw
xasqwx asqwxx sqwxxa

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: dippel

all 720 cipher variations:
dippel dipple dipepl dipelp diplep diplpe dippel dipple dipepl dipelp diplep
diplpe dieppl dieplp dieppl dieplp dielpp dielpp dilpep dilppe dilepp dilepp
dilpep dilppe dpipel dpiple dpiepl dpielp dpilep dpilpe dppiel dppile dppeil
dppeli dpplei dpplie dpepil dpepli dpeipl dpeilp dpelip dpelpi dplpei dplpie
dplepi dpleip dpliep dplipe dppiel dppile dppeil dppeli dpplei dpplie dpipel
dpiple dpiepl dpielp dpilep dpilpe dpeipl dpeilp dpepil dpepli dpelpi dpelip
dpliep dplipe dpleip dplepi dplpei dplpie deppil deppli depipl depilp deplip
deplpi deppil deppli depipl depilp deplip deplpi deippl deiplp deippl deiplp
deilpp deilpp delpip delppi delipp delipp delpip delppi dlppei dlppie dlpepi
dlpeip dlpiep dlpipe dlppei dlppie dlpepi dlpeip dlpiep dlpipe dleppi dlepip
dleppi dlepip dleipp dleipp dlipep dlippe dliepp dliepp dlipep dlippe idppel
idpple idpepl idpelp idplep idplpe idppel idpple idpepl idpelp idplep idplpe
ideppl ideplp ideppl ideplp idelpp idelpp idlpep idlppe idlepp idlepp idlpep
idlppe ipdpel ipdple ipdepl ipdelp ipdlep ipdlpe ippdel ippdle ippedl ippeld
ippled ipplde ipepdl ipepld ipedpl ipedlp ipeldp ipelpd iplped iplpde iplepd
ipledp ipldep ipldpe ippdel ippdle ippedl ippeld ippled ipplde ipdpel ipdple
ipdepl ipdelp ipdlep ipdlpe ipedpl ipedlp ipepdl ipepld ipelpd ipeldp ipldep
ipldpe ipledp iplepd iplped iplpde ieppdl ieppld iepdpl iepdlp iepldp ieplpd
ieppdl ieppld iepdpl iepdlp iepldp ieplpd iedppl iedplp iedppl iedplp iedlpp
iedlpp ielpdp ielppd ieldpp ieldpp ielpdp ielppd ilpped ilppde ilpepd ilpedp
ilpdep ilpdpe ilpped ilppde ilpepd ilpedp ilpdep ilpdpe ileppd ilepdp ileppd
ilepdp iledpp iledpp ildpep ildppe ildepp ildepp ildpep ildppe pidpel pidple
pidepl pidelp pidlep pidlpe pipdel pipdle pipedl pipeld pipled piplde piepdl
piepld piedpl piedlp pieldp pielpd pilped pilpde pilepd piledp pildep pildpe
pdipel pdiple pdiepl pdielp pdilep pdilpe pdpiel pdpile pdpeil pdpeli pdplei
pdplie pdepil pdepli pdeipl pdeilp pdelip pdelpi pdlpei pdlpie pdlepi pdleip
pdliep pdlipe ppdiel ppdile ppdeil ppdeli ppdlei ppdlie ppidel ppidle ppiedl
ppield ppiled ppilde ppeidl ppeild ppedil ppedli ppeldi ppelid pplied pplide
ppleid ppledi ppldei ppldie pedpil pedpli pedipl pedilp pedlip pedlpi pepdil
pepdli pepidl pepild peplid pepldi peipdl peipld peidpl peidlp peildp peilpd
pelpid pelpdi pelipd pelidp peldip peldpi pldpei pldpie pldepi pldeip pldiep
pldipe plpdei plpdie plpedi plpeid plpied plpide plepdi plepid pledpi pledip
pleidp pleipd pliped plipde pliepd pliedp plidep plidpe pipdel pipdle pipedl
pipeld pipled piplde pidpel pidple pidepl pidelp pidlep pidlpe piedpl piedlp
piepdl piepld pielpd pieldp pildep pildpe piledp pilepd pilped pilpde ppidel
ppidle ppiedl ppield ppiled ppilde ppdiel ppdile ppdeil ppdeli ppdlei ppdlie
ppedil ppedli ppeidl ppeild ppelid ppeldi ppldei ppldie ppledi ppleid pplied
pplide pdpiel pdpile pdpeil pdpeli pdplei pdplie pdipel pdiple pdiepl pdielp
pdilep pdilpe pdeipl pdeilp pdepil pdepli pdelpi pdelip pdliep pdlipe pdleip
pdlepi pdlpei pdlpie pepdil pepdli pepidl pepild peplid pepldi pedpil pedpli
pedipl pedilp pedlip pedlpi peidpl peidlp peipdl peipld peilpd peildp peldip
peldpi pelidp pelipd pelpid pelpdi plpdei plpdie plpedi plpeid plpied plpide
pldpei pldpie pldepi pldeip pldiep pldipe pledpi pledip plepdi plepid pleipd
pleidp plidep plidpe pliedp pliepd pliped plipde eippdl eippld eipdpl eipdlp
eipldp eiplpd eippdl eippld eipdpl eipdlp eipldp eiplpd eidppl eidplp eidppl
eidplp eidlpp eidlpp eilpdp eilppd eildpp eildpp eilpdp eilppd epipdl epipld
epidpl epidlp epildp epilpd eppidl eppild eppdil eppdli eppldi epplid epdpil
epdpli epdipl epdilp epdlip epdlpi eplpdi eplpid epldpi epldip eplidp eplipd
eppidl eppild eppdil eppdli eppldi epplid epipdl epipld epidpl epidlp epildp
epilpd epdipl epdilp epdpil epdpli epdlpi epdlip eplidp eplipd epldip epldpi
eplpdi eplpid edppil edppli edpipl edpilp edplip edplpi edppil edppli edpipl
edpilp edplip edplpi edippl ediplp edippl ediplp edilpp edilpp edlpip edlppi
edlipp edlipp edlpip edlppi elppdi elppid elpdpi elpdip elpidp elpipd elppdi
elppid elpdpi elpdip elpidp elpipd eldppi eldpip eldppi eldpip eldipp eldipp
elipdp elippd elidpp elidpp elipdp elippd lipped lippde lipepd lipedp lipdep
lipdpe lipped lippde lipepd lipedp lipdep lipdpe lieppd liepdp lieppd liepdp
liedpp liedpp lidpep lidppe lidepp lidepp lidpep lidppe lpiped lpipde lpiepd
lpiedp lpidep lpidpe lppied lppide lppeid lppedi lppdei lppdie lpepid lpepdi
lpeipd lpeidp lpedip lpedpi lpdpei lpdpie lpdepi lpdeip lpdiep lpdipe lppied
lppide lppeid lppedi lppdei lppdie lpiped lpipde lpiepd lpiedp lpidep lpidpe
lpeipd lpeidp lpepid lpepdi lpedpi lpedip lpdiep lpdipe lpdeip lpdepi lpdpei
lpdpie leppid leppdi lepipd lepidp lepdip lepdpi leppid leppdi lepipd lepidp
lepdip lepdpi leippd leipdp leippd leipdp leidpp leidpp ledpip ledppi ledipp
ledipp ledpip ledppi ldppei ldppie ldpepi ldpeip ldpiep ldpipe ldppei ldppie
ldpepi ldpeip ldpiep ldpipe ldeppi ldepip ldeppi ldepip ldeipp ldeipp ldipep
ldippe ldiepp ldiepp ldipep ldippe

Read more ...[1] , [2] , [3]

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