easy ciphers

Easy Ciphers Tools:
cryptography lectures
popular ciphers:

sonometer

zongo

urodeles

wornout

featural

woundableness

vasvirag

wardens

wranglingly

rigsy

zemstroist

westberry

wingnut

cynognathus

unexperiencedness

vocalization

yapster

vicos


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: somsak
cipher variations:
tpntbl uqoucm vrpvdn wsqweo xtrxfp
yusygq zvtzhr awuais bxvbjt cywcku
dzxdlv eayemw fbzfnx gcagoy hdbhpz
ieciqa jfdjrb kgeksc lhfltd migmue
njhnvf okiowg pljpxh qmkqyi rnlrzj

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.)
Read more ...
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: somsak
Cipher: hlnhzp

Read more ...

 

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: somsak
Cipher: BAAAB ABBAB ABABB BAAAB AAAAA ABAAB

Read more ...

 

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: somsak
cipher variations:
tpntbldrldbfntjnbzxvhxbthxfhbnrzdrbhldzlbvvfxvbp
fhvfbjpjtpbdzlrzbxjnpjbruqoucmesmecgoukocaywiycu
iygicosaescimeamcwwgywcqgiwgckqkuqceamsacykoqkcs
vrpvdnftnfdhpvlpdbzxjzdvjzhjdptbftdjnfbndxxhzxdr
hjxhdlrlvrdfbntbdzlprldtwsqweoguogeiqwmqecaykaew
kaikequcguekogcoeyyiayesikyiemsmwsegcouceamqsmeu
xtrxfphvphfjrxnrfdbzlbfxlbjlfrvdhvflphdpfzzjbzft
jlzjfntnxtfhdpvdfbnrtnfvyusygqiwqigksyosgecamcgy
mckmgsweiwgmqieqgaakcagukmakgouoyugieqwegcosuogw
zvtzhrjxrjhltzpthfdbndhzndlnhtxfjxhnrjfrhbbldbhv
lnblhpvpzvhjfrxfhdptvphxawuaiskyskimuaquigecoeia
oemoiuygkyioskgsiccmeciwmocmiqwqawikgsygiequwqiy
bxvbjtlztljnvbrvjhfdpfjbpfnpjvzhlzjptlhtjddnfdjx
npdnjrxrbxjlhtzhjfrvxrjzcywckumaumkowcswkigeqgkc
qgoqkwaimakqumiukeeogekyoqeoksyscykmiuaikgswyska
dzxdlvnbvnlpxdtxljhfrhldrhprlxbjnblrvnjvlffphflz
prfpltztdzlnjvbjlhtxztlbeayemwocwomqyeuymkigsime
siqsmyckocmswokwmggqigmaqsgqmuaueamokwckmiuyaumc
fbzfnxpdxpnrzfvznljhtjnftjrtnzdlpdntxplxnhhrjhnb
rthrnvbvfbnplxdlnjvzbvndgcagoyqeyqosagwaomkiukog
uksuoaemqeouyqmyoiiskiocsuisowcwgcoqmyemokwacwoe
hdbhpzrfzrptbhxbpnljvlphvltvpbfnrfpvzrnzpjjtljpd
tvjtpxdxhdprnzfnplxbdxpfieciqasgasquciycqomkwmqi
wmuwqcgosgqwasoaqkkumkqeuwkuqyeyieqsoagoqmyceyqg
jfdjrbthbtrvdjzdrpnlxnrjxnvxrdhpthrxbtpbrllvnlrf
vxlvrzfzjfrtpbhprnzdfzrhkgekscuicuswekaesqomyosk
yowyseiquisycuqcsmmwomsgwymwsagakgsuqciqsoaegasi
lhfltdvjdvtxflbftrpnzptlzpxztfjrvjtzdvrdtnnxpnth
xznxtbhblhtvrdjrtpbfhbtjmigmuewkewuygmcgusqoaqum
aqyaugkswkuaewseuooyqouiyaoyucicmiuwseksuqcgicuk
njhnvfxlfxvzhndhvtrpbrvnbrzbvhltxlvbfxtfvppzrpvj
zbpzvdjdnjvxtfltvrdhjdvlokiowgymgywaioeiwusqcswo
csacwimuymwcgyugwqqasqwkacqawekeokwyugmuwseikewm
pljpxhznhzxbjpfjxvtrdtxpdtbdxjnvznxdhzvhxrrbtrxl
bdrbxflfplxzvhnvxtfjlfxnqmkqyiaoiayckqgkywuseuyq
euceykowaoyeiawiysscusymcescygmgqmyawiowyugkmgyo
rnlrzjbpjbzdlrhlzxvtfvzrfvdfzlpxbpzfjbxjzttdvtzn
dftdzhnhrnzbxjpxzvhlnhzpsomsakcqkcaemsimaywugwas
gwegamqycqagkcykauuewuaoegueaioisoacykqyawimoiaq

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,

Read more ...

 

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: somsak
Cipher: fbzfnx

Read more ...

 

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: somsak
Cipher: 344323341152

Extended Methods:
Method #1

Plaintext: somsak
method variations:
xtrxfpcywcluhdbhqznignve

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
s o m s a k 
3 4 2 3 1 5 
4 3 3 4 1 2 
They are then read out in rows:
342315433412
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: somsak
Cipher: smvosf

Read more ...
Method #3

Plaintext: somsak
method variations:
thndvm hndvmt ndvmth
dvmthn vmthnd mthndv

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: somsak

all 720 cipher variations:
somsak somska somask somaks somkas somksa sosmak sosmka sosamk sosakm soskam
soskma soasmk soaskm soamsk soamks soakms soaksm soksam soksma sokasm sokams
sokmas sokmsa smosak smoska smoask smoaks smokas smoksa smsoak smsoka smsaok
smsako smskao smskoa smasok smasko smaosk smaoks smakos smakso smksao smksoa
smkaso smkaos smkoas smkosa ssmoak ssmoka ssmaok ssmako ssmkao ssmkoa ssomak
ssomka ssoamk ssoakm ssokam ssokma ssaomk ssaokm ssamok ssamko ssakmo ssakom
sskoam sskoma sskaom sskamo sskmao sskmoa samsok samsko samosk samoks samkos
samkso sasmok sasmko sasomk sasokm saskom saskmo saosmk saoskm saomsk saomks
saokms saoksm saksom saksmo sakosm sakoms sakmos sakmso skmsao skmsoa skmaso
skmaos skmoas skmosa sksmao sksmoa sksamo sksaom sksoam sksoma skasmo skasom
skamso skamos skaoms skaosm skosam skosma skoasm skoams skomas skomsa osmsak
osmska osmask osmaks osmkas osmksa ossmak ossmka ossamk ossakm osskam osskma
osasmk osaskm osamsk osamks osakms osaksm osksam osksma oskasm oskams oskmas
oskmsa omssak omsska omsask omsaks omskas omsksa omssak omsska omsask omsaks
omskas omsksa omassk omasks omassk omasks omakss omakss omksas omkssa omkass
omkass omksas omkssa osmsak osmska osmask osmaks osmkas osmksa ossmak ossmka
ossamk ossakm osskam osskma osasmk osaskm osamsk osamks osakms osaksm osksam
osksma oskasm oskams oskmas oskmsa oamssk oamsks oamssk oamsks oamkss oamkss
oasmsk oasmks oassmk oasskm oasksm oaskms oassmk oasskm oasmsk oasmks oaskms
oasksm oakssm oaksms oakssm oaksms oakmss oakmss okmsas okmssa okmass okmass
okmsas okmssa oksmas oksmsa oksams oksasm okssam okssma okasms okassm okamss
okamss okasms okassm okssam okssma oksasm oksams oksmas oksmsa mossak mosska
mosask mosaks moskas mosksa mossak mosska mosask mosaks moskas mosksa moassk
moasks moassk moasks moakss moakss moksas mokssa mokass mokass moksas mokssa
msosak msoska msoask msoaks msokas msoksa mssoak mssoka mssaok mssako msskao
msskoa msasok msasko msaosk msaoks msakos msakso msksao msksoa mskaso mskaos
mskoas mskosa mssoak mssoka mssaok mssako msskao msskoa msosak msoska msoask
msoaks msokas msoksa msaosk msaoks msasok msasko msakso msakos mskoas mskosa
mskaos mskaso msksao msksoa massok massko masosk masoks maskos maskso massok
massko masosk masoks maskos maskso maossk maosks maossk maosks maokss maokss
maksos maksso makoss makoss maksos maksso mkssao mkssoa mksaso mksaos mksoas
mksosa mkssao mkssoa mksaso mksaos mksoas mksosa mkasso mkasos mkasso mkasos
mkaoss mkaoss mkosas mkossa mkoass mkoass mkosas mkossa somsak somska somask
somaks somkas somksa sosmak sosmka sosamk sosakm soskam soskma soasmk soaskm
soamsk soamks soakms soaksm soksam soksma sokasm sokams sokmas sokmsa smosak
smoska smoask smoaks smokas smoksa smsoak smsoka smsaok smsako smskao smskoa
smasok smasko smaosk smaoks smakos smakso smksao smksoa smkaso smkaos smkoas
smkosa ssmoak ssmoka ssmaok ssmako ssmkao ssmkoa ssomak ssomka ssoamk ssoakm
ssokam ssokma ssaomk ssaokm ssamok ssamko ssakmo ssakom sskoam sskoma sskaom
sskamo sskmao sskmoa samsok samsko samosk samoks samkos samkso sasmok sasmko
sasomk sasokm saskom saskmo saosmk saoskm saomsk saomks saokms saoksm saksom
saksmo sakosm sakoms sakmos sakmso skmsao skmsoa skmaso skmaos skmoas skmosa
sksmao sksmoa sksamo sksaom sksoam sksoma skasmo skasom skamso skamos skaoms
skaosm skosam skosma skoasm skoams skomas skomsa aomssk aomsks aomssk aomsks
aomkss aomkss aosmsk aosmks aossmk aosskm aosksm aoskms aossmk aosskm aosmsk
aosmks aoskms aosksm aokssm aoksms aokssm aoksms aokmss aokmss amossk amosks
amossk amosks amokss amokss amsosk amsoks amssok amssko amskso amskos amssok
amssko amsosk amsoks amskos amskso amksso amksos amksso amksos amkoss amkoss
asmosk asmoks asmsok asmsko asmkso asmkos asomsk asomks asosmk asoskm asoksm
asokms assomk assokm assmok assmko asskmo asskom askosm askoms asksom asksmo
askmso askmos asmsok asmsko asmosk asmoks asmkos asmkso assmok assmko assomk
assokm asskom asskmo asosmk asoskm asomsk asomks asokms asoksm asksom asksmo
askosm askoms askmos askmso akmsso akmsos akmsso akmsos akmoss akmoss aksmso
aksmos akssmo akssom aksosm aksoms akssmo akssom aksmso aksmos aksoms aksosm
akossm akosms akossm akosms akomss akomss komsas komssa komass komass komsas
komssa kosmas kosmsa kosams kosasm kossam kossma koasms koassm koamss koamss
koasms koassm kossam kossma kosasm kosams kosmas kosmsa kmosas kmossa kmoass
kmoass kmosas kmossa kmsoas kmsosa kmsaos kmsaso kmssao kmssoa kmasos kmasso
kmaoss kmaoss kmasos kmasso kmssao kmssoa kmsaso kmsaos kmsoas kmsosa ksmoas
ksmosa ksmaos ksmaso ksmsao ksmsoa ksomas ksomsa ksoams ksoasm ksosam ksosma
ksaoms ksaosm ksamos ksamso ksasmo ksasom kssoam kssoma kssaom kssamo kssmao
kssmoa kamsos kamsso kamoss kamoss kamsos kamsso kasmos kasmso kasoms kasosm
kassom kassmo kaosms kaossm kaomss kaomss kaosms kaossm kassom kassmo kasosm
kasoms kasmos kasmso ksmsao ksmsoa ksmaso ksmaos ksmoas ksmosa kssmao kssmoa
kssamo kssaom kssoam kssoma ksasmo ksasom ksamso ksamos ksaoms ksaosm ksosam
ksosma ksoasm ksoams ksomas ksomsa

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

History of cryptography
2011 Easy Ciphers. All rights reserved. contact us