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veenstra

shindledecker

whelpley

waukon

pgntt

unedible

covetousness

atrorubent

impugn

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valsecitos

threads

nonmischievous

euhemeristic

veily

digitizes

pertinebat

undiscernedly


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: eevlsi
cipher variations:
ffwmtj ggxnuk hhyovl iizpwm jjaqxn
kkbryo llcszp mmdtaq nneubr oofvcs
ppgwdt qqhxeu rriyfv ssjzgw ttkahx
uulbiy vvmcjz wwndka xxoelb yypfmc
zzqgnd aarhoe bbsipf cctjqg ddukrh

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: eevlsi
Cipher: vveohr

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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: eevlsi
Cipher: AABAA AABAA BBBAB ABABA BAAAB ABAAA

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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: eevlsi
cipher variations:
ffwmtjnnmidzvvcenpddsaxflliwhvttysrljjeklrrrugvh
zzkcfxhhaypnppquzdxxgqjtggxnukoonjeawwdfoqeetbyg
mmjxiwuuztsmkkflmsssvhwiaaldgyiibzqoqqrvaeyyhrku
hhyovlppokfbxxegprffuczhnnkyjxvvautnllgmntttwixj
bbmehzjjcarprrswbfzzislviizpwmqqplgcyyfhqsggvdai
oolzkywwbvuommhnouuuxjykccnfiakkdbsqsstxcgaajtmw
jjaqxnrrqmhdzzgirthhwebjppmalzxxcwvpnniopvvvykzl
ddogjbllectrttuydhbbkunxkkbryossrnieaahjsuiixfck
qqnbmayydxwqoojpqwwwzlameephkcmmfdusuuvzeicclvoy
llcszpttsojfbbiktvjjygdlrrocnbzzeyxrppkqrxxxambn
ffqildnngevtvvwafjddmwpzmmdtaquutpkgccjluwkkzhem
sspdocaafzysqqlrsyyybncoggrjmeoohfwuwwxbgkeenxqa
nneubrvvuqlhddkmvxllaifnttqepdbbgaztrrmstzzzcodp
hhsknfppigxvxxychlffoyrboofvcswwvrmieelnwymmbjgo
uurfqecchbaussntuaaadpeqiitlogqqjhywyyzdimggpzsc
ppgwdtxxwsnjffmoxznnckhpvvsgrfddicbvttouvbbbeqfr
jjumphrrkizxzzaejnhhqatdqqhxeuyyxtokggnpyaoodliq
wwthsgeejdcwuupvwcccfrgskkvnqissljayaabfkoiirbue
rriyfvzzyuplhhoqzbppemjrxxuithffkedxvvqwxdddgsht
llworjttmkbzbbcglpjjscvfssjzgwaazvqmiipracqqfnks
yyvjuigglfeywwrxyeeehtiummxpskuunlcaccdhmqkktdwg
ttkahxbbawrnjjqsbdrrgoltzzwkvjhhmgfzxxsyzfffiujv
nnyqtlvvomdbddeinrlluexhuulbiyccbxsokkrtcesshpmu
aaxlwkiinhgayytzagggjvkwoozrumwwpneceefjosmmvfyi
vvmcjzddcytpllsudfttiqnvbbymxljjoihbzzuabhhhkwlx
ppasvnxxqofdffgkptnnwgzjwwndkaeedzuqmmtveguujrow
ccznymkkpjicaavbciiilxmyqqbtwoyyrpgegghlquooxhak
xxoelbffeavrnnuwfhvvkspxddaoznllqkjdbbwcdjjjmynz
rrcuxpzzsqhfhhimrvppyiblyypfmcggfbwsoovxgiwwltqy
eebpaommrlkeccxdekkknzoassdvyqaatrigiijnswqqzjcm
zzqgndhhgcxtppwyhjxxmurzffcqbpnnsmlfddyefllloapb
ttewzrbbusjhjjkotxrrakdnaarhoeiihdyuqqxzikyynvsa
ggdrcqootnmgeezfgmmmpbqcuufxasccvtkikklpuyssbleo
bbsipfjjiezvrryajlzzowtbhhesdrppuonhffaghnnnqcrd
vvgybtddwuljllmqvzttcmfpcctjqgkkjfawsszbkmaapxuc
iiftesqqvpoiggbhiooordsewwhzcueexvmkmmnrwauudngq
ddukrhllkgbxttaclnbbqyvdjjguftrrwqpjhhcijpppsetf
xxiadvffywnlnnosxbvveohreevlsimmlhcyuubdmoccrzwe
kkhvgussxrqkiidjkqqqtfugyyjbewggzxomooptycwwfpis

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: eevlsi
Cipher: rriyfv

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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: eevlsi
Cipher: 515115133442

Extended Methods:
Method #1

Plaintext: eevlsi
method variations:
kkaqxoppfvctuulahyzzqfnd

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
e e v l s i 
5 5 1 1 3 4 
1 1 5 3 4 2 
They are then read out in rows:
551134115342
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: eevlsi
Cipher: zasapi

Read more ...
Method #3

Plaintext: eevlsi
method variations:
vaentw aentwv entwva
ntwvae twvaen wvaent

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: eevlsi

all 720 cipher variations:
eevlsi eevlis eevsli eevsil eevisl eevils eelvsi eelvis eelsvi eelsiv eelisv
eelivs eeslvi eesliv eesvli eesvil eesivl eesilv eeilsv eeilvs eeislv eeisvl
eeivsl eeivls evelsi evelis evesli evesil eveisl eveils evlesi evleis evlsei
evlsie evlise evlies evslei evslie evseli evseil evsiel evsile evilse eviles
evisle evisel eviesl eviels elvesi elveis elvsei elvsie elvise elvies elevsi
elevis elesvi elesiv eleisv eleivs elsevi elseiv elsvei elsvie elsive elsiev
eliesv elievs elisev elisve elivse elives esvlei esvlie esveli esveil esviel
esvile eslvei eslvie eslevi esleiv esliev eslive eselvi eseliv esevli esevil
eseivl eseilv esilev esilve esielv esievl esivel esivle eivlse eivles eivsle
eivsel eivesl eivels eilvse eilves eilsve eilsev eilesv eilevs eislve eislev
eisvle eisvel eisevl eiselv eielsv eielvs eieslv eiesvl eievsl eievls eevlsi
eevlis eevsli eevsil eevisl eevils eelvsi eelvis eelsvi eelsiv eelisv eelivs
eeslvi eesliv eesvli eesvil eesivl eesilv eeilsv eeilvs eeislv eeisvl eeivsl
eeivls evelsi evelis evesli evesil eveisl eveils evlesi evleis evlsei evlsie
evlise evlies evslei evslie evseli evseil evsiel evsile evilse eviles evisle
evisel eviesl eviels elvesi elveis elvsei elvsie elvise elvies elevsi elevis
elesvi elesiv eleisv eleivs elsevi elseiv elsvei elsvie elsive elsiev eliesv
elievs elisev elisve elivse elives esvlei esvlie esveli esveil esviel esvile
eslvei eslvie eslevi esleiv esliev eslive eselvi eseliv esevli esevil eseivl
eseilv esilev esilve esielv esievl esivel esivle eivlse eivles eivsle eivsel
eivesl eivels eilvse eilves eilsve eilsev eilesv eilevs eislve eislev eisvle
eisvel eisevl eiselv eielsv eielvs eieslv eiesvl eievsl eievls veelsi veelis
veesli veesil veeisl veeils velesi veleis velsei velsie velise velies veslei
veslie veseli veseil vesiel vesile veilse veiles veisle veisel veiesl veiels
veelsi veelis veesli veesil veeisl veeils velesi veleis velsei velsie velise
velies veslei veslie veseli veseil vesiel vesile veilse veiles veisle veisel
veiesl veiels vleesi vleeis vlesei vlesie vleise vleies vleesi vleeis vlesei
vlesie vleise vleies vlseei vlseie vlseei vlseie vlsiee vlsiee vliese vliees
vlisee vlisee vliese vliees vselei vselie vseeli vseeil vseiel vseile vsleei
vsleie vsleei vsleie vsliee vsliee vselei vselie vseeli vseeil vseiel vseile
vsilee vsilee vsiele vsieel vsieel vsiele vielse vieles viesle viesel vieesl
vieels vilese vilees vilsee vilsee vilese vilees vislee vislee visele viseel
viseel visele vielse vieles viesle viesel vieesl vieels levesi leveis levsei
levsie levise levies leevsi leevis leesvi leesiv leeisv leeivs lesevi leseiv
lesvei lesvie lesive lesiev leiesv leievs leisev leisve leivse leives lveesi
lveeis lvesei lvesie lveise lveies lveesi lveeis lvesei lvesie lveise lveies
lvseei lvseie lvseei lvseie lvsiee lvsiee lviese lviees lvisee lvisee lviese
lviees levesi leveis levsei levsie levise levies leevsi leevis leesvi leesiv
leeisv leeivs lesevi leseiv lesvei lesvie lesive lesiev leiesv leievs leisev
leisve leivse leives lsveei lsveie lsveei lsveie lsviee lsviee lsevei lsevie
lseevi lseeiv lseiev lseive lseevi lseeiv lsevei lsevie lseive lseiev lsieev
lsieve lsieev lsieve lsivee lsivee livese livees livsee livsee livese livees
lievse lieves liesve liesev lieesv lieevs liseve liseev lisvee lisvee liseve
liseev lieesv lieevs liesev liesve lievse lieves sevlei sevlie seveli seveil
seviel sevile selvei selvie selevi seleiv seliev selive seelvi seeliv seevli
seevil seeivl seeilv seilev seilve seielv seievl seivel seivle svelei svelie
sveeli sveeil sveiel sveile svleei svleie svleei svleie svliee svliee svelei
svelie sveeli sveeil sveiel sveile svilee svilee sviele svieel svieel sviele
slveei slveie slveei slveie slviee slviee slevei slevie sleevi sleeiv sleiev
sleive sleevi sleeiv slevei slevie sleive sleiev slieev slieve slieev slieve
slivee slivee sevlei sevlie seveli seveil seviel sevile selvei selvie selevi
seleiv seliev selive seelvi seeliv seevli seevil seeivl seeilv seilev seilve
seielv seievl seivel seivle sivlee sivlee sivele siveel siveel sivele silvee
silvee sileve sileev sileev sileve sielve sielev sievle sievel sieevl sieelv
sielev sielve sieelv sieevl sievel sievle ievlse ievles ievsle ievsel ievesl
ievels ielvse ielves ielsve ielsev ielesv ielevs ieslve ieslev iesvle iesvel
iesevl ieselv ieelsv ieelvs ieeslv ieesvl ieevsl ieevls ivelse iveles ivesle
ivesel iveesl iveels ivlese ivlees ivlsee ivlsee ivlese ivlees ivslee ivslee
ivsele ivseel ivseel ivsele ivelse iveles ivesle ivesel iveesl iveels ilvese
ilvees ilvsee ilvsee ilvese ilvees ilevse ileves ilesve ilesev ileesv ileevs
ilseve ilseev ilsvee ilsvee ilseve ilseev ileesv ileevs ilesev ilesve ilevse
ileves isvlee isvlee isvele isveel isveel isvele islvee islvee isleve isleev
isleev isleve iselve iselev isevle isevel iseevl iseelv iselev iselve iseelv
iseevl isevel isevle ievlse ievles ievsle ievsel ievesl ievels ielvse ielves
ielsve ielsev ielesv ielevs ieslve ieslev iesvle iesvel iesevl ieselv ieelsv
ieelvs ieeslv ieesvl ieevsl ieevls

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