easy ciphers

Easy Ciphers Tools:
cryptography lectures
popular ciphers:

tulliae

xinjiangensis

wintrify

zelazny

zincotype

zvarag

vocaremus

zealand

zlatne

turndowns

zootechnics

unpretty

ungraven

wiscnet

steeber

zoomania

uocor

abednego


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: kokoli
cipher variations:
lplpmj mqmqnk nrnrol osospm ptptqn
ququro rvrvsp swswtq txtxur uyuyvs
vzvzwt wawaxu xbxbyv ycyczw zdzdax
aeaeby bfbfcz cgcgda dhdheb eieifc
fjfjgd gkgkhe hlhlif imimjg jnjnkh

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: kokoli
Cipher: plplor

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: kokoli
Cipher: ABAAB ABBAB ABAAB ABBAB ABABA ABAAA

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: kokoli
cipher variations:
lplpmjfrfrizztzteptvtvafnxnxwvhzhzslvdvdkrpfpfgh
jhjhcxdjdjynxlxludrnrnqtmqmqnkgsgsjaauaufquwuwbg
oyoyxwiaiatmwewelsqgqghikikidyekekzoymymvesosoru
nrnrolhthtkbbvbvgrvxvxchpzpzyxjbjbunxfxfmtrhrhij
ljljezflflapznznwftptpsvosospmiuiulccwcwhswywydi
qaqazykckcvoygygnusisijkmkmkfagmgmbqaoaoxguquqtw
ptptqnjvjvmddxdxitxzxzejrbrbazldldwpzhzhovtjtjkl
nlnlgbhnhncrbpbpyhvrvruxququrokwkwneeyeyjuyayafk
scscbamemexqaiaipwukuklmomomhcioiodscqcqziwswsvy
rvrvsplxlxoffzfzkvzbzbgltdtdcbnfnfyrbjbjqxvlvlmn
pnpnidjpjpetdrdrajxtxtwzswswtqmymypggagalwacachm
ueuedcogogzsckckrywmwmnoqoqojekqkqfuesesbkyuyuxa
txtxurnznzqhhbhbmxbdbdinvfvfedphphatdldlszxnxnop
rprpkflrlrgvftftclzvzvybuyuyvsoaoariicicnycecejo
wgwgfeqiqibuememtayoyopqsqsqlgmsmshwgugudmawawzc
vzvzwtpbpbsjjdjdozdfdfkpxhxhgfrjrjcvfnfnubzpzpqr
trtrmhntntixhvhvenbxbxadwawaxuqcqctkkekepaegeglq
yiyihgskskdwgogovcaqaqrsususniououjyiwiwfocycybe
xbxbyvrdrdullflfqbfhfhmrzjzjihtltlexhphpwdbrbrst
vtvtojpvpvkzjxjxgpdzdzcfycyczwsesevmmgmgrcgigins
akakjiumumfyiqiqxecscstuwuwupkqwqwlakykyhqeaeadg
zdzdaxtftfwnnhnhsdhjhjotblblkjvnvngzjrjryfdtdtuv
xvxvqlrxrxmblzlzirfbfbehaeaebyugugxooioiteikikpu
cmcmlkwowohakskszgeueuvwywywrmsysyncmamajsgcgcfi
bfbfczvhvhyppjpjufjljlqvdndnmlxpxpibltltahfvfvwx
zxzxsntztzodnbnbkthdhdgjcgcgdawiwizqqkqkvgkmkmrw
eoeonmyqyqjcmumubigwgwxyayaytouauapeococluieiehk
dhdhebxjxjarrlrlwhlnlnsxfpfponzrzrkdnvnvcjhxhxyz
bzbzupvbvbqfpdpdmvjfjfileieifcykykbssmsmximomoty
gqgqpoasasleowowdkiyiyzacacavqwcwcrgqeqenwkgkgjm
fjfjgdzlzlcttntnyjnpnpuzhrhrqpbtbtmfpxpxeljzjzab
dbdbwrxdxdshrfrfoxlhlhkngkgkheamamduuouozkoqoqva
isisrqcucungqyqyfmkakabcececxsyeyetisgsgpymimilo
hlhlifbnbnevvpvpalprprwbjtjtsrdvdvohrzrzgnlblbcd
fdfdytzfzfujththqznjnjmpimimjgcocofwwqwqbmqsqsxc
kukutsewewpisasahomcmcdegegezuagagvkuiuiraokoknq
jnjnkhdpdpgxxrxrcnrtrtydlvlvutfxfxqjtbtbipndndef
hfhfavbhbhwlvjvjsbplplorkokolieqeqhyysysdosusuze
mwmwvugygyrkucucjqoeoefgigigbwcicixmwkwktcqmqmps

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: kokoli
Cipher: xbxbyv

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: kokoli
Cipher: 524352431342

Extended Methods:
Method #1

Plaintext: kokoli
method variations:
ptptqouyuyvtzdzdayeieifd

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
k o k o l i 
5 4 5 4 1 4 
2 3 2 3 3 2 
They are then read out in rows:
545414232332
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: kokoli
Cipher: uuqmmh

Read more ...
Method #3

Plaintext: kokoli
method variations:
rxrcsw xrcswr rcswrx
cswrxr swrxrc wrxrcs

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: kokoli

all 720 cipher variations:
kokoli kokoil kokloi koklio kokilo kokiol kookli kookil koolki koolik kooilk
kooikl koloki koloik kolkoi kolkio koliko koliok koiolk koiokl koilok koilko
koiklo koikol kkooli kkooil kkoloi kkolio kkoilo kkoiol kkooli kkooil kkoloi
kkolio kkoilo kkoiol kklooi kkloio kklooi kkloio kklioo kklioo kkiolo kkiool
kkiloo kkiloo kkiolo kkiool kokoli kokoil kokloi koklio kokilo kokiol kookli
kookil koolki koolik kooilk kooikl koloki koloik kolkoi kolkio koliko koliok
koiolk koiokl koilok koilko koiklo koikol klkooi klkoio klkooi klkoio klkioo
klkioo klokoi klokio klooki klooik kloiok kloiko klooki klooik klokoi klokio
kloiko kloiok kliook klioko kliook klioko klikoo klikoo kikolo kikool kikloo
kikloo kikolo kikool kioklo kiokol kiolko kiolok kioolk kiookl kiloko kilook
kilkoo kilkoo kiloko kilook kioolk kiookl kiolok kiolko kioklo kiokol okkoli
okkoil okkloi okklio okkilo okkiol okokli okokil okolki okolik okoilk okoikl
okloki okloik oklkoi oklkio okliko okliok okiolk okiokl okilok okilko okiklo
okikol okkoli okkoil okkloi okklio okkilo okkiol okokli okokil okolki okolik
okoilk okoikl okloki okloik oklkoi oklkio okliko okliok okiolk okiokl okilok
okilko okiklo okikol ookkli ookkil ooklki ooklik ookilk ookikl ookkli ookkil
ooklki ooklik ookilk ookikl oolkki oolkik oolkki oolkik oolikk oolikk ooiklk
ooikkl ooilkk ooilkk ooiklk ooikkl olkoki olkoik olkkoi olkkio olkiko olkiok
olokki olokik olokki olokik oloikk oloikk olkoki olkoik olkkoi olkkio olkiko
olkiok oliokk oliokk olikok olikko olikko olikok oikolk oikokl oiklok oiklko
oikklo oikkol oioklk oiokkl oiolkk oiolkk oioklk oiokkl oilokk oilokk oilkok
oilkko oilkko oilkok oikolk oikokl oiklok oiklko oikklo oikkol kokoli kokoil
kokloi koklio kokilo kokiol kookli kookil koolki koolik kooilk kooikl koloki
koloik kolkoi kolkio koliko koliok koiolk koiokl koilok koilko koiklo koikol
kkooli kkooil kkoloi kkolio kkoilo kkoiol kkooli kkooil kkoloi kkolio kkoilo
kkoiol kklooi kkloio kklooi kkloio kklioo kklioo kkiolo kkiool kkiloo kkiloo
kkiolo kkiool kokoli kokoil kokloi koklio kokilo kokiol kookli kookil koolki
koolik kooilk kooikl koloki koloik kolkoi kolkio koliko koliok koiolk koiokl
koilok koilko koiklo koikol klkooi klkoio klkooi klkoio klkioo klkioo klokoi
klokio klooki klooik kloiok kloiko klooki klooik klokoi klokio kloiko kloiok
kliook klioko kliook klioko klikoo klikoo kikolo kikool kikloo kikloo kikolo
kikool kioklo kiokol kiolko kiolok kioolk kiookl kiloko kilook kilkoo kilkoo
kiloko kilook kioolk kiookl kiolok kiolko kioklo kiokol ookkli ookkil ooklki
ooklik ookilk ookikl ookkli ookkil ooklki ooklik ookilk ookikl oolkki oolkik
oolkki oolkik oolikk oolikk ooiklk ooikkl ooilkk ooilkk ooiklk ooikkl okokli
okokil okolki okolik okoilk okoikl okkoli okkoil okkloi okklio okkilo okkiol
oklkoi oklkio okloki okloik okliok okliko okiklo okikol okilko okilok okiolk
okiokl okkoli okkoil okkloi okklio okkilo okkiol okokli okokil okolki okolik
okoilk okoikl okloki okloik oklkoi oklkio okliko okliok okiolk okiokl okilok
okilko okiklo okikol olkkoi olkkio olkoki olkoik olkiok olkiko olkkoi olkkio
olkoki olkoik olkiok olkiko olokki olokik olokki olokik oloikk oloikk olikok
olikko oliokk oliokk olikok olikko oikklo oikkol oiklko oiklok oikolk oikokl
oikklo oikkol oiklko oiklok oikolk oikokl oilkko oilkok oilkko oilkok oilokk
oilokk oioklk oiokkl oiolkk oiolkk oioklk oiokkl lokoki lokoik lokkoi lokkio
lokiko lokiok lookki lookik lookki lookik looikk looikk lokoki lokoik lokkoi
lokkio lokiko lokiok loiokk loiokk loikok loikko loikko loikok lkooki lkooik
lkokoi lkokio lkoiko lkoiok lkooki lkooik lkokoi lkokio lkoiko lkoiok lkkooi
lkkoio lkkooi lkkoio lkkioo lkkioo lkioko lkiook lkikoo lkikoo lkioko lkiook
lokoki lokoik lokkoi lokkio lokiko lokiok lookki lookik lookki lookik looikk
looikk lokoki lokoik lokkoi lokkio lokiko lokiok loiokk loiokk loikok loikko
loikko loikok lkkooi lkkoio lkkooi lkkoio lkkioo lkkioo lkokoi lkokio lkooki
lkooik lkoiok lkoiko lkooki lkooik lkokoi lkokio lkoiko lkoiok lkiook lkioko
lkiook lkioko lkikoo lkikoo likoko likook likkoo likkoo likoko likook liokko
liokok liokko liokok liookk liookk likoko likook likkoo likkoo likoko likook
liookk liookk liokok liokko liokko liokok iokolk iokokl ioklok ioklko iokklo
iokkol iooklk iookkl ioolkk ioolkk iooklk iookkl iolokk iolokk iolkok iolkko
iolkko iolkok iokolk iokokl ioklok ioklko iokklo iokkol ikoolk ikookl ikolok
ikolko ikoklo ikokol ikoolk ikookl ikolok ikolko ikoklo ikokol iklook ikloko
iklook ikloko iklkoo iklkoo ikkolo ikkool ikkloo ikkloo ikkolo ikkool iokolk
iokokl ioklok ioklko iokklo iokkol iooklk iookkl ioolkk ioolkk iooklk iookkl
iolokk iolokk iolkok iolkko iolkko iolkok iokolk iokokl ioklok ioklko iokklo
iokkol ilkook ilkoko ilkook ilkoko ilkkoo ilkkoo ilokok ilokko ilookk ilookk
ilokok ilokko ilookk ilookk ilokok ilokko ilokko ilokok ilkook ilkoko ilkook
ilkoko ilkkoo ilkkoo ikkolo ikkool ikkloo ikkloo ikkolo ikkool ikoklo ikokol
ikolko ikolok ikoolk ikookl ikloko iklook iklkoo iklkoo ikloko iklook ikoolk
ikookl ikolok ikolko ikoklo ikokol

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

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