easy ciphers

Easy Ciphers Tools:
cryptography lectures
popular ciphers:

vialmaking

haughs

subtreasuries

warriner

ouenite

townful

prospexistique

startlers

stereolab

geogate

lavatic

trouts

anhalamine

immatureness

millersport

jurywomen

substruct

japery


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: wotton
cipher variations:
xpuupo yqvvqp zrwwrq asxxsr btyyts
cuzzut dvaavu ewbbwv fxccxw gyddyx
hzeezy iaffaz jbggba kchhcb ldiidc
mejjed nfkkfe ogllgf phmmhg qinnih
rjooji skppkj tlqqlk umrrml vnssnm

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: wotton
Cipher: dlgglm

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: wotton
Cipher: BABAA ABBAB BAABA BAABA ABBAB ABBAA

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: wotton
cipher variations:
xpuupoprggrohtsstozveevorxqqxojzcczotdaadolfmmfo
dhyyhovjkkjonlwwlofniinoyqvvqpqshhspiuttupawffwp
syrrypkaddapuebbepmgnngpeizzipwkllkpomxxmpgojjop
zrwwrqrtiitqjvuuvqbxggxqtzsszqlbeebqvfccfqnhoohq
fjaajqxlmmlqpnyynqhpkkpqasxxsrsujjurkwvvwrcyhhyr
uattarmcffcrwgddgroippirgkbbkrymnnmrqozzoriqllqr
btyytstvkkvslxwwxsdziizsvbuubsndggdsxheehspjqqjs
hlcclsznoonsrpaapsjrmmrscuzzutuwllwtmyxxyteajjat
wcvvctoehhetyiffitqkrrktimddmtaoppotsqbbqtksnnst
dvaavuvxmmxunzyyzufbkkbuxdwwdupfiifuzjggjurlsslu
jneenubpqqputrccrultootuewbbwvwynnyvoazzavgcllcv
yexxevqgjjgvakhhkvsmttmvkoffovcqrrqvusddsvmuppuv
fxccxwxzoozwpbaabwhdmmdwzfyyfwrhkkhwbliilwtnuunw
lpggpwdrssrwvteetwnvqqvwgyddyxyappaxqcbbcxiennex
agzzgxsillixcmjjmxuovvoxmqhhqxesttsxwuffuxowrrwx
hzeezyzbqqbyrdccdyjfoofybhaahytjmmjydnkknyvpwwpy
nriiryftuutyxvggvypxssxyiaffazacrrczseddezkgppgz
cibbizuknnkzeollozwqxxqzosjjszguvvuzywhhwzqyttyz
jbggbabdssdatfeefalhqqhadjccjavloolafpmmpaxryyra
ptkktahvwwvazxiixarzuuzakchhcbcettebugffgbmirrib
ekddkbwmppmbgqnnqbyszzsbqullubiwxxwbayjjybsavvab
ldiidcdfuufcvhgghcnjssjcfleelcxnqqnchroorcztaatc
rvmmvcjxyyxcbzkkzctbwwbcmejjedegvvgdwihhidokttkd
gmffmdyorrodisppsdaubbudswnnwdkyzzydcalladucxxcd
nfkkfefhwwhexjiijepluulehnggnezpsspejtqqtebvccve
txooxelzaazedbmmbevdyydeogllgfgixxifykjjkfqmvvmf
iohhofaqttqfkurrufcwddwfuyppyfmabbafecnncfwezzef
phmmhghjyyjgzlkklgrnwwngjpiipgbruurglvssvgdxeexg
vzqqzgnbccbgfdoodgxfaafgqinnihikzzkhamllmhsoxxoh
kqjjqhcsvvshmwttwheyffyhwarrahocddchgeppehygbbgh
rjoojijlaalibnmmnitpyypilrkkridtwwtinxuuxifzggzi
xbssbipdeedihfqqfizhcchiskppkjkmbbmjconnojuqzzqj
msllsjeuxxujoyvvyjgahhajycttcjqeffejigrrgjaiddij
tlqqlklnccnkdpoopkvraarkntmmtkfvyyvkpzwwzkhbiibk
zduudkrfggfkjhsshkbjeejkumrrmlmoddoleqppqlwsbbsl
ounnulgwzzwlqaxxalicjjclaevvelsghhglkittilckffkl
vnssnmnpeepmfrqqrmxtcctmpvoovmhxaaxmrbyybmjdkkdm
bfwwfmthiihmljuujmdlgglmwottonoqffqngsrrsnyuddun
qwppwniybbynsczzcnkellencgxxgnuijjinmkvvknemhhmn

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: wotton
Cipher: jbggba

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: wotton
Cipher: 254344444333

Extended Methods:
Method #1

Plaintext: wotton
method variations:
btyytsgyddyxmdiidcriooih

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
w o t t o n 
2 4 4 4 4 3 
5 3 4 4 3 3 
They are then read out in rows:
244443534433
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: wotton
Cipher: rtoptn

Read more ...
Method #3

Plaintext: wotton
method variations:
usttnh sttnhu ttnhus
tnhust nhustt husttn

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: wotton

all 720 cipher variations:
wotton wottno wototn wotont wotnot wotnto wotton wottno wototn wotont wotnot
wotnto woottn wootnt woottn wootnt woontt woontt wontot wontto wonott wonott
wontot wontto wtoton wtotno wtootn wtoont wtonot wtonto wttoon wttono wttoon
wttono wttnoo wttnoo wtoton wtotno wtootn wtoont wtonot wtonto wtntoo wtntoo
wtnoto wtnoot wtnoot wtnoto wttoon wttono wttoon wttono wttnoo wttnoo wtoton
wtotno wtootn wtoont wtonot wtonto wtootn wtoont wtoton wtotno wtonto wtonot
wtnoot wtnoto wtnoot wtnoto wtntoo wtntoo wotton wottno wototn wotont wotnot
wotnto wotton wottno wototn wotont wotnot wotnto woottn wootnt woottn wootnt
woontt woontt wontot wontto wonott wonott wontot wontto wnttoo wnttoo wntoto
wntoot wntoot wntoto wnttoo wnttoo wntoto wntoot wntoot wntoto wnotto wnotot
wnotto wnotot wnoott wnoott wnotot wnotto wnoott wnoott wnotot wnotto owtton
owttno owtotn owtont owtnot owtnto owtton owttno owtotn owtont owtnot owtnto
owottn owotnt owottn owotnt owontt owontt owntot owntto ownott ownott owntot
owntto otwton otwtno otwotn otwont otwnot otwnto ottwon ottwno ottown ottonw
ottnow ottnwo ototwn ototnw otowtn otownt otonwt otontw otntow otntwo otnotw
otnowt otnwot otnwto ottwon ottwno ottown ottonw ottnow ottnwo otwton otwtno
otwotn otwont otwnot otwnto otowtn otownt ototwn ototnw otontw otonwt otnwot
otnwto otnowt otnotw otntow otntwo oottwn oottnw ootwtn ootwnt ootnwt ootntw
oottwn oottnw ootwtn ootwnt ootnwt ootntw oowttn oowtnt oowttn oowtnt oowntt
oowntt oontwt oonttw oonwtt oonwtt oontwt oonttw onttow onttwo ontotw ontowt
ontwot ontwto onttow onttwo ontotw ontowt ontwot ontwto onottw onotwt onottw
onotwt onowtt onowtt onwtot onwtto onwott onwott onwtot onwtto towton towtno
towotn towont townot townto totwon totwno totown totonw totnow totnwo tootwn
tootnw toowtn toownt toonwt toontw tontow tontwo tonotw tonowt tonwot tonwto
twoton twotno twootn twoont twonot twonto twtoon twtono twtoon twtono twtnoo
twtnoo twoton twotno twootn twoont twonot twonto twntoo twntoo twnoto twnoot
twnoot twnoto ttwoon ttwono ttwoon ttwono ttwnoo ttwnoo ttowon ttowno ttoown
ttoonw ttonow ttonwo ttoown ttoonw ttowon ttowno ttonwo ttonow ttnoow ttnowo
ttnoow ttnowo ttnwoo ttnwoo towton towtno towotn towont townot townto totwon
totwno totown totonw totnow totnwo tootwn tootnw toowtn toownt toonwt toontw
tontow tontwo tonotw tonowt tonwot tonwto tnwtoo tnwtoo tnwoto tnwoot tnwoot
tnwoto tntwoo tntwoo tntowo tntoow tntoow tntowo tnotwo tnotow tnowto tnowot
tnoowt tnootw tnotow tnotwo tnootw tnoowt tnowot tnowto totwon totwno totown
totonw totnow totnwo towton towtno towotn towont townot townto toowtn toownt
tootwn tootnw toontw toonwt tonwot tonwto tonowt tonotw tontow tontwo ttowon
ttowno ttoown ttoonw ttonow ttonwo ttwoon ttwono ttwoon ttwono ttwnoo ttwnoo
ttowon ttowno ttoown ttoonw ttonow ttonwo ttnwoo ttnwoo ttnowo ttnoow ttnoow
ttnowo twtoon twtono twtoon twtono twtnoo twtnoo twoton twotno twootn twoont
twonot twonto twootn twoont twoton twotno twonto twonot twnoot twnoto twnoot
twnoto twntoo twntoo totwon totwno totown totonw totnow totnwo towton towtno
towotn towont townot townto toowtn toownt tootwn tootnw toontw toonwt tonwot
tonwto tonowt tonotw tontow tontwo tntwoo tntwoo tntowo tntoow tntoow tntowo
tnwtoo tnwtoo tnwoto tnwoot tnwoot tnwoto tnowto tnowot tnotwo tnotow tnootw
tnoowt tnowot tnowto tnoowt tnootw tnotow tnotwo oottwn oottnw ootwtn ootwnt
ootnwt ootntw oottwn oottnw ootwtn ootwnt ootnwt ootntw oowttn oowtnt oowttn
oowtnt oowntt oowntt oontwt oonttw oonwtt oonwtt oontwt oonttw ototwn ototnw
otowtn otownt otonwt otontw ottown ottonw ottwon ottwno ottnwo ottnow otwton
otwtno otwotn otwont otwnot otwnto otntwo otntow otnwto otnwot otnowt otnotw
ottown ottonw ottwon ottwno ottnwo ottnow ototwn ototnw otowtn otownt otonwt
otontw otwotn otwont otwton otwtno otwnto otwnot otnowt otnotw otnwot otnwto
otntwo otntow owtton owttno owtotn owtont owtnot owtnto owtton owttno owtotn
owtont owtnot owtnto owottn owotnt owottn owotnt owontt owontt owntot owntto
ownott ownott owntot owntto onttwo onttow ontwto ontwot ontowt ontotw onttwo
onttow ontwto ontwot ontowt ontotw onwtto onwtot onwtto onwtot onwott onwott
onotwt onottw onowtt onowtt onotwt onottw nottow nottwo nototw notowt notwot
notwto nottow nottwo nototw notowt notwot notwto noottw nootwt noottw nootwt
noowtt noowtt nowtot nowtto nowott nowott nowtot nowtto ntotow ntotwo ntootw
ntoowt ntowot ntowto nttoow nttowo nttoow nttowo nttwoo nttwoo ntotow ntotwo
ntootw ntoowt ntowot ntowto ntwtoo ntwtoo ntwoto ntwoot ntwoot ntwoto nttoow
nttowo nttoow nttowo nttwoo nttwoo ntotow ntotwo ntootw ntoowt ntowot ntowto
ntootw ntoowt ntotow ntotwo ntowto ntowot ntwoot ntwoto ntwoot ntwoto ntwtoo
ntwtoo nottow nottwo nototw notowt notwot notwto nottow nottwo nototw notowt
notwot notwto noottw nootwt noottw nootwt noowtt noowtt nowtot nowtto nowott
nowott nowtot nowtto nwttoo nwttoo nwtoto nwtoot nwtoot nwtoto nwttoo nwttoo
nwtoto nwtoot nwtoot nwtoto nwotto nwotot nwotto nwotot nwoott nwoott nwotot
nwotto nwoott nwoott nwotot nwotto

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

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