easy ciphers

Easy Ciphers Tools:
cryptography lectures
popular ciphers:

doubtlessly

lucumoque

manchineel

tenuis

iuberet

saberleg

annagerman

decavero

highmount

meltzer

formavit

prickets

autumnally

respiciebas

cohesions

coifing

sanguinem

furtherances


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: mudras
cipher variations:
nvesbt owftcu pxgudv qyhvew rziwfx
sajxgy tbkyhz uclzia vdmajb wenbkc
xfocld ygpdme zhqenf airfog bjsgph
ckthqi dluirj emvjsk fnwktl goxlum
hpymvn iqznwo jraoxp ksbpyq ltcqzr

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: mudras
Cipher: nfwizh

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: mudras
Cipher: ABABB BAABB AAABB BAAAA AAAAA BAAAB

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: mudras
cipher variations:
nvesbtljkabdjxqibnhlwqbxfzcybhdnigbrzpuwblxdaebv
vrgmbftfmubprtscbzphykbjowftcumklbcekyrjcoimxrcy
gadzcieojhcsaqvxcmyebfcwwshncgugnvcqsutdcaqizlck
pxgudvnlmcdflzskdpjnysdzhbeadjfpkidtbrwydnzfcgdx
xtiodhvhowdrtvuedbrjamdlqyhvewomndegmatleqkoztea
icfbekgqljeucsxzeoagdheyyujpeiwipxesuwvfecskbnem
rziwfxpnoefhnbumfrlpaufbjdgcflhrmkfvdtyafpbheifz
zvkqfjxjqyftvxwgfdtlcofnsajxgyqopfgiocvngsmqbvgc
kehdgmisnlgweuzbgqcifjgaawlrgkykrzguwyxhgeumdpgo
tbkyhzrpqghjpdwohtnrcwhdlfiehnjtomhxfvachrdjgkhb
bxmshlzlsahvxzyihfvneqhpuclziasqrhikqexpiuosdxie
mgjfiokupniygwbdisekhliccyntimamtbiwyazjigwofriq
vdmajbtrsijlrfyqjvpteyjfnhkgjplvqojzhxcejtflimjd
dzoujnbnucjxzbakjhxpgsjrwenbkcustjkmsgzrkwqufzkg
oilhkqmwrpkaiydfkugmjnkeeapvkocovdkyacblkiyqhtks
xfocldvtuklnthaslxrvgalhpjmilrnxsqlbjzeglvhnkolf
fbqwlpdpwelzbdcmljzriultygpdmewuvlmouibtmyswhbmi
qknjmsoytrmckafhmwiolpmggcrxmqeqxfmacednmkasjvmu
zhqenfxvwmnpvjcunztxicnjrlokntpzusndlbginxjpmqnh
hdsynrfrygnbdfeonlbtkwnvairfogywxnoqwkdvoauyjdok
smplouqavtoemchjoykqnroiietzosgszhocegfpomculxow
bjsgphzxyoprxlewpbvzkepltnqmpvrbwupfndikpzlrospj
jfuapthtaipdfhgqpndvmypxckthqiayzpqsymfxqcwalfqm
uornqwscxvqgoejlqamsptqkkgvbquiubjqegihrqoewnzqy
dluirjbzaqrtzngyrdxbmgrnvpsorxtdywrhpfkmrbntqurl
lhwcrvjvckrfhjisrpfxoarzemvjskcabrsuaohzseycnhso
wqtpsyuezxsiqglnscourvsmmixdswkwdlsgikjtsqgypbsa
fnwktldbcstvbpiatfzdoitpxruqtzvfaytjrhmotdpvswtn
njyetxlxemthjlkutrhzqctbgoxlumecdtuwcqjbugaepjuq
ysvruawgbzuksinpueqwtxuookzfuymyfnuikmlvusiarduc
hpymvnfdeuvxdrkcvhbfqkvrztwsvbxhcavltjoqvfrxuyvp
plagvznzgovjlnmwvtjbsevdiqznwogefvwyesldwicgrlws
auxtwcyidbwmukprwgsyvzwqqmbhwaoahpwkmonxwukctfwe
jraoxphfgwxzftmexjdhsmxtbvyuxdzjecxnvlqsxhtzwaxr
rncixbpbiqxlnpoyxvldugxfksbpyqighxyagunfykeitnyu
cwzvyeakfdyowmrtyiuaxbyssodjycqcjrymoqpzywmevhyg
ltcqzrjhiyzbhvogzlfjuozvdxawzfblgezpxnsuzjvbyczt
tpekzdrdksznprqazxnfwizhmudraskijzaciwphamgkvpaw
eybxagcmhfaqyotvakwczdauuqflaeseltaoqsrbayogxjai

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: mudras
Cipher: zhqenf

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: mudras
Cipher: 235441241134

Extended Methods:
Method #1

Plaintext: mudras
method variations:
rziwfxweoblcbktgqhgpymvn

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
m u d r a s 
2 5 4 2 1 3 
3 4 1 4 1 4 
They are then read out in rows:
254213341414
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: mudras
Cipher: wilsqq

Read more ...
Method #3

Plaintext: mudras
method variations:
xtfdli tfdlix fdlixt
dlixtf lixtfd ixtfdl

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: mudras

all 720 cipher variations:
mudras mudrsa mudars mudasr mudsar mudsra murdas murdsa murads murasd mursad
mursda muards muarsd muadrs muadsr muasdr muasrd musrad musrda musard musadr
musdar musdra mduras mdursa mduars mduasr mdusar mdusra mdruas mdrusa mdraus
mdrasu mdrsau mdrsua mdarus mdarsu mdaurs mdausr mdasur mdasru mdsrau mdsrua
mdsaru mdsaur mdsuar mdsura mrduas mrdusa mrdaus mrdasu mrdsau mrdsua mrudas
mrudsa mruads mruasd mrusad mrusda mrauds mrausd mradus mradsu mrasdu mrasud
mrsuad mrsuda mrsaud mrsadu mrsdau mrsdua madrus madrsu madurs madusr madsur
madsru mardus mardsu maruds marusd marsud marsdu maurds maursd maudrs maudsr
mausdr mausrd masrud masrdu masurd masudr masdur masdru msdrau msdrua msdaru
msdaur msduar msdura msrdau msrdua msradu msraud msruad msruda msardu msarud
msadru msadur msaudr msaurd msurad msurda msuard msuadr msudar msudra umdras
umdrsa umdars umdasr umdsar umdsra umrdas umrdsa umrads umrasd umrsad umrsda
umards umarsd umadrs umadsr umasdr umasrd umsrad umsrda umsard umsadr umsdar
umsdra udmras udmrsa udmars udmasr udmsar udmsra udrmas udrmsa udrams udrasm
udrsam udrsma udarms udarsm udamrs udamsr udasmr udasrm udsram udsrma udsarm
udsamr udsmar udsmra urdmas urdmsa urdams urdasm urdsam urdsma urmdas urmdsa
urmads urmasd urmsad urmsda uramds uramsd uradms uradsm urasdm urasmd ursmad
ursmda ursamd ursadm ursdam ursdma uadrms uadrsm uadmrs uadmsr uadsmr uadsrm
uardms uardsm uarmds uarmsd uarsmd uarsdm uamrds uamrsd uamdrs uamdsr uamsdr
uamsrd uasrmd uasrdm uasmrd uasmdr uasdmr uasdrm usdram usdrma usdarm usdamr
usdmar usdmra usrdam usrdma usradm usramd usrmad usrmda usardm usarmd usadrm
usadmr usamdr usamrd usmrad usmrda usmard usmadr usmdar usmdra dumras dumrsa
dumars dumasr dumsar dumsra durmas durmsa durams durasm dursam dursma duarms
duarsm duamrs duamsr duasmr duasrm dusram dusrma dusarm dusamr dusmar dusmra
dmuras dmursa dmuars dmuasr dmusar dmusra dmruas dmrusa dmraus dmrasu dmrsau
dmrsua dmarus dmarsu dmaurs dmausr dmasur dmasru dmsrau dmsrua dmsaru dmsaur
dmsuar dmsura drmuas drmusa drmaus drmasu drmsau drmsua drumas drumsa druams
druasm drusam drusma draums drausm dramus dramsu drasmu drasum drsuam drsuma
drsaum drsamu drsmau drsmua damrus damrsu damurs damusr damsur damsru darmus
darmsu darums darusm darsum darsmu daurms daursm daumrs daumsr dausmr dausrm
dasrum dasrmu dasurm dasumr dasmur dasmru dsmrau dsmrua dsmaru dsmaur dsmuar
dsmura dsrmau dsrmua dsramu dsraum dsruam dsruma dsarmu dsarum dsamru dsamur
dsaumr dsaurm dsuram dsurma dsuarm dsuamr dsumar dsumra rudmas rudmsa rudams
rudasm rudsam rudsma rumdas rumdsa rumads rumasd rumsad rumsda ruamds ruamsd
ruadms ruadsm ruasdm ruasmd rusmad rusmda rusamd rusadm rusdam rusdma rdumas
rdumsa rduams rduasm rdusam rdusma rdmuas rdmusa rdmaus rdmasu rdmsau rdmsua
rdamus rdamsu rdaums rdausm rdasum rdasmu rdsmau rdsmua rdsamu rdsaum rdsuam
rdsuma rmduas rmdusa rmdaus rmdasu rmdsau rmdsua rmudas rmudsa rmuads rmuasd
rmusad rmusda rmauds rmausd rmadus rmadsu rmasdu rmasud rmsuad rmsuda rmsaud
rmsadu rmsdau rmsdua radmus radmsu radums radusm radsum radsmu ramdus ramdsu
ramuds ramusd ramsud ramsdu raumds raumsd raudms raudsm rausdm rausmd rasmud
rasmdu rasumd rasudm rasdum rasdmu rsdmau rsdmua rsdamu rsdaum rsduam rsduma
rsmdau rsmdua rsmadu rsmaud rsmuad rsmuda rsamdu rsamud rsadmu rsadum rsaudm
rsaumd rsumad rsumda rsuamd rsuadm rsudam rsudma audrms audrsm audmrs audmsr
audsmr audsrm aurdms aurdsm aurmds aurmsd aursmd aursdm aumrds aumrsd aumdrs
aumdsr aumsdr aumsrd ausrmd ausrdm ausmrd ausmdr ausdmr ausdrm adurms adursm
adumrs adumsr adusmr adusrm adrums adrusm adrmus adrmsu adrsmu adrsum admrus
admrsu admurs admusr admsur admsru adsrmu adsrum adsmru adsmur adsumr adsurm
ardums ardusm ardmus ardmsu ardsmu ardsum arudms arudsm arumds arumsd arusmd
arusdm armuds armusd armdus armdsu armsdu armsud arsumd arsudm arsmud arsmdu
arsdmu arsdum amdrus amdrsu amdurs amdusr amdsur amdsru amrdus amrdsu amruds
amrusd amrsud amrsdu amurds amursd amudrs amudsr amusdr amusrd amsrud amsrdu
amsurd amsudr amsdur amsdru asdrmu asdrum asdmru asdmur asdumr asdurm asrdmu
asrdum asrmdu asrmud asrumd asrudm asmrdu asmrud asmdru asmdur asmudr asmurd
asurmd asurdm asumrd asumdr asudmr asudrm sudram sudrma sudarm sudamr sudmar
sudmra surdam surdma suradm suramd surmad surmda suardm suarmd suadrm suadmr
suamdr suamrd sumrad sumrda sumard sumadr sumdar sumdra sduram sdurma sduarm
sduamr sdumar sdumra sdruam sdruma sdraum sdramu sdrmau sdrmua sdarum sdarmu
sdaurm sdaumr sdamur sdamru sdmrau sdmrua sdmaru sdmaur sdmuar sdmura srduam
srduma srdaum srdamu srdmau srdmua srudam srudma sruadm sruamd srumad srumda
sraudm sraumd sradum sradmu sramdu sramud srmuad srmuda srmaud srmadu srmdau
srmdua sadrum sadrmu sadurm sadumr sadmur sadmru sardum sardmu sarudm sarumd
sarmud sarmdu saurdm saurmd saudrm saudmr saumdr saumrd samrud samrdu samurd
samudr samdur samdru smdrau smdrua smdaru smdaur smduar smdura smrdau smrdua
smradu smraud smruad smruda smardu smarud smadru smadur smaudr smaurd smurad
smurda smuard smuadr smudar smudra

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

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