easy ciphers

Easy Ciphers Tools:
cryptography lectures
popular ciphers:

siuslaw

unamenability

weberi

tchang

vengefully

mignons

ouimet

confugint

szineszek

bedimming

mayfish

peruviana

tremors

idree

polyoecism

searcloth

societateque

squabby


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: fajara
cipher variations:
gbkbsb hclctc idmdud jeneve kfofwf
lgpgxg mhqhyh nirizi ojsjaj pktkbk
qlulcl rmvmdm snwnen toxofo upypgp
vqzqhq wrarir xsbsjs ytctkt zudulu
avevmv bwfwnw cxgxox dyhypy ezizqz

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: fajara
Cipher: uzqziz

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: fajara
Cipher: AABAB AAAAA BBBAA AAAAA BAAAA AAAAA

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: fajara
cipher variations:
gbkbsbqbcbababubibkbmbqbubebybebwbgbybgbwbibybeb
sbqbmbcbibubmbabcbwbsbkbhclctcrcdcbcbcvcjclcncrc
vcfczcfcxchczchcxcjczcfctcrcncdcjcvcncbcdcxctclc
idmdudsdedcdcdwdkdmdodsdwdgdadgdydidadidydkdadgd
udsdodedkdwdodcdedydudmdjenevetefededexelenepete
xehebehezejebejezelebehevetepefelexepedefezevene
kfofwfufgfefefyfmfofqfufyfifcfifafkfcfkfafmfcfif
wfufqfgfmfyfqfefgfafwfoflgpgxgvghgfgfgzgngpgrgvg
zgjgdgjgbglgdglgbgngdgjgxgvgrghgngzgrgfghgbgxgpg
mhqhyhwhihghghahohqhshwhahkhehkhchmhehmhchohehkh
yhwhshihohahshghihchyhqhnirizixijihihibipiritixi
bilifilidinifinidipifilizixitijipibitihijidiziri
ojsjajyjkjijijcjqjsjujyjcjmjgjmjejojgjojejqjgjmj
ajyjujkjqjcjujijkjejajsjpktkbkzklkjkjkdkrktkvkzk
dknkhknkfkpkhkpkfkrkhknkbkzkvklkrkdkvkjklkfkbktk
qlulclalmlklklelslulwlalelolilolglqlilqlglslilol
clalwlmlslelwlklmlglclulrmvmdmbmnmlmlmfmtmvmxmbm
fmpmjmpmhmrmjmrmhmtmjmpmdmbmxmnmtmfmxmlmnmhmdmvm
snwnencnonmnmngnunwnyncngnqnknqninsnknsninunknqn
encnynonungnynmnoninenwntoxofodopononohovoxozodo
horolorojotolotojovolorofodozopovohozonopojofoxo
upypgpepqpopopipwpypapepipspmpspkpupmpupkpwpmpsp
gpepapqpwpipapopqpkpgpypvqzqhqfqrqpqpqjqxqzqbqfq
jqtqnqtqlqvqnqvqlqxqnqtqhqfqbqrqxqjqbqpqrqlqhqzq
wrarirgrsrqrqrkryrarcrgrkrurorurmrwrorwrmryrorur
irgrcrsryrkrcrqrsrmrirarxsbsjshstsrsrslszsbsdshs
lsvspsvsnsxspsxsnszspsvsjshsdstszslsdsrstsnsjsbs
ytctktitutststmtatctetitmtwtqtwtotytqtytotatqtwt
ktitetutatmtetstutotktctzudulujuvututunubudufuju
nuxuruxupuzuruzupuburuxulujufuvubunufutuvupuludu
avevmvkvwvuvuvovcvevgvkvovyvsvyvqvavsvavqvcvsvyv
mvkvgvwvcvovgvuvwvqvmvevbwfwnwlwxwvwvwpwdwfwhwlw
pwzwtwzwrwbwtwbwrwdwtwzwnwlwhwxwdwpwhwvwxwrwnwfw
cxgxoxmxyxwxwxqxexgxixmxqxaxuxaxsxcxuxcxsxexuxax
oxmxixyxexqxixwxyxsxoxgxdyhypynyzyxyxyryfyhyjyny
rybyvybytydyvydytyfyvybypynyjyzyfyryjyxyzytypyhy
ezizqzozazyzyzszgzizkzozszczwzczuzezwzezuzgzwzcz
qzozkzazgzszkzyzazuzqzizfajarapabazazatahajalapa
tadaxadavafaxafavahaxadarapalabahatalazabavaraja

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: fajara
Cipher: snwnen

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: fajara
Cipher: 121142112411

Extended Methods:
Method #1

Plaintext: fajara
method variations:
lfofwfqltlblvqyqgqavdvmv

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
f a j a r a 
1 1 4 1 2 1 
2 1 2 1 4 1 
They are then read out in rows:
114121212141
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: fajara
Cipher: adbbbd

Read more ...
Method #3

Plaintext: fajara
method variations:
bqbfda qbfdab bfdabq
fdabqb dabqbf abqbfd

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: fajara

all 720 cipher variations:
fajara fajaar fajraa fajraa fajara fajaar faajra faajar faarja faaraj faaarj
faaajr faraja faraaj farjaa farjaa faraja faraaj faaarj faaajr faaraj faarja
faajra faajar fjaara fjaaar fjaraa fjaraa fjaara fjaaar fjaara fjaaar fjaraa
fjaraa fjaara fjaaar fjraaa fjraaa fjraaa fjraaa fjraaa fjraaa fjaara fjaaar
fjaraa fjaraa fjaara fjaaar fajara fajaar fajraa fajraa fajara fajaar faajra
faajar faarja faaraj faaarj faaajr faraja faraaj farjaa farjaa faraja faraaj
faaarj faaajr faaraj faarja faajra faajar frjaaa frjaaa frjaaa frjaaa frjaaa
frjaaa frajaa frajaa fraaja fraaaj fraaaj fraaja fraaja fraaaj frajaa frajaa
fraaja fraaaj fraaaj fraaja fraaaj fraaja frajaa frajaa fajara fajaar fajraa
fajraa fajara fajaar faajra faajar faarja faaraj faaarj faaajr faraja faraaj
farjaa farjaa faraja faraaj faaarj faaajr faaraj faarja faajra faajar afjara
afjaar afjraa afjraa afjara afjaar afajra afajar afarja afaraj afaarj afaajr
afraja afraaj afrjaa afrjaa afraja afraaj afaarj afaajr afaraj afarja afajra
afajar ajfara ajfaar ajfraa ajfraa ajfara ajfaar ajafra ajafar ajarfa ajaraf
ajaarf ajaafr ajrafa ajraaf ajrfaa ajrfaa ajrafa ajraaf ajaarf ajaafr ajaraf
ajarfa ajafra ajafar aajfra aajfar aajrfa aajraf aajarf aajafr aafjra aafjar
aafrja aafraj aafarj aafajr aarfja aarfaj aarjfa aarjaf aarajf aarafj aaafrj
aaafjr aaarfj aaarjf aaajrf aaajfr arjafa arjaaf arjfaa arjfaa arjafa arjaaf
arajfa arajaf arafja arafaj araafj araajf arfaja arfaaj arfjaa arfjaa arfaja
arfaaj araafj araajf arafaj arafja arajfa arajaf aajarf aajafr aajraf aajrfa
aajfra aajfar aaajrf aaajfr aaarjf aaarfj aaafrj aaafjr aarajf aarafj aarjaf
aarjfa aarfja aarfaj aafarj aafajr aafraj aafrja aafjra aafjar jafara jafaar
jafraa jafraa jafara jafaar jaafra jaafar jaarfa jaaraf jaaarf jaaafr jarafa
jaraaf jarfaa jarfaa jarafa jaraaf jaaarf jaaafr jaaraf jaarfa jaafra jaafar
jfaara jfaaar jfaraa jfaraa jfaara jfaaar jfaara jfaaar jfaraa jfaraa jfaara
jfaaar jfraaa jfraaa jfraaa jfraaa jfraaa jfraaa jfaara jfaaar jfaraa jfaraa
jfaara jfaaar jafara jafaar jafraa jafraa jafara jafaar jaafra jaafar jaarfa
jaaraf jaaarf jaaafr jarafa jaraaf jarfaa jarfaa jarafa jaraaf jaaarf jaaafr
jaaraf jaarfa jaafra jaafar jrfaaa jrfaaa jrfaaa jrfaaa jrfaaa jrfaaa jrafaa
jrafaa jraafa jraaaf jraaaf jraafa jraafa jraaaf jrafaa jrafaa jraafa jraaaf
jraaaf jraafa jraaaf jraafa jrafaa jrafaa jafara jafaar jafraa jafraa jafara
jafaar jaafra jaafar jaarfa jaaraf jaaarf jaaafr jarafa jaraaf jarfaa jarfaa
jarafa jaraaf jaaarf jaaafr jaaraf jaarfa jaafra jaafar aajfra aajfar aajrfa
aajraf aajarf aajafr aafjra aafjar aafrja aafraj aafarj aafajr aarfja aarfaj
aarjfa aarjaf aarajf aarafj aaafrj aaafjr aaarfj aaarjf aaajrf aaajfr ajafra
ajafar ajarfa ajaraf ajaarf ajaafr ajfara ajfaar ajfraa ajfraa ajfara ajfaar
ajrfaa ajrfaa ajrafa ajraaf ajraaf ajrafa ajafra ajafar ajarfa ajaraf ajaarf
ajaafr afjara afjaar afjraa afjraa afjara afjaar afajra afajar afarja afaraj
afaarj afaajr afraja afraaj afrjaa afrjaa afraja afraaj afaarj afaajr afaraj
afarja afajra afajar arjfaa arjfaa arjafa arjaaf arjaaf arjafa arfjaa arfjaa
arfaja arfaaj arfaaj arfaja arafja arafaj arajfa arajaf araajf araafj arafaj
arafja araafj araajf arajaf arajfa aajfra aajfar aajrfa aajraf aajarf aajafr
aafjra aafjar aafrja aafraj aafarj aafajr aarfja aarfaj aarjfa aarjaf aarajf
aarafj aaafrj aaafjr aaarfj aaarjf aaajrf aaajfr rajafa rajaaf rajfaa rajfaa
rajafa rajaaf raajfa raajaf raafja raafaj raaafj raaajf rafaja rafaaj rafjaa
rafjaa rafaja rafaaj raaafj raaajf raafaj raafja raajfa raajaf rjaafa rjaaaf
rjafaa rjafaa rjaafa rjaaaf rjaafa rjaaaf rjafaa rjafaa rjaafa rjaaaf rjfaaa
rjfaaa rjfaaa rjfaaa rjfaaa rjfaaa rjaafa rjaaaf rjafaa rjafaa rjaafa rjaaaf
rajafa rajaaf rajfaa rajfaa rajafa rajaaf raajfa raajaf raafja raafaj raaafj
raaajf rafaja rafaaj rafjaa rafjaa rafaja rafaaj raaafj raaajf raafaj raafja
raajfa raajaf rfjaaa rfjaaa rfjaaa rfjaaa rfjaaa rfjaaa rfajaa rfajaa rfaaja
rfaaaj rfaaaj rfaaja rfaaja rfaaaj rfajaa rfajaa rfaaja rfaaaj rfaaaj rfaaja
rfaaaj rfaaja rfajaa rfajaa rajafa rajaaf rajfaa rajfaa rajafa rajaaf raajfa
raajaf raafja raafaj raaafj raaajf rafaja rafaaj rafjaa rafjaa rafaja rafaaj
raaafj raaajf raafaj raafja raajfa raajaf aajarf aajafr aajraf aajrfa aajfra
aajfar aaajrf aaajfr aaarjf aaarfj aaafrj aaafjr aarajf aarafj aarjaf aarjfa
aarfja aarfaj aafarj aafajr aafraj aafrja aafjra aafjar ajaarf ajaafr ajaraf
ajarfa ajafra ajafar ajaarf ajaafr ajaraf ajarfa ajafra ajafar ajraaf ajrafa
ajraaf ajrafa ajrfaa ajrfaa ajfara ajfaar ajfraa ajfraa ajfara ajfaar aajarf
aajafr aajraf aajrfa aajfra aajfar aaajrf aaajfr aaarjf aaarfj aaafrj aaafjr
aarajf aarafj aarjaf aarjfa aarfja aarfaj aafarj aafajr aafraj aafrja aafjra
aafjar arjaaf arjafa arjaaf arjafa arjfaa arjfaa arajaf arajfa araajf araafj
arafaj arafja araajf araafj arajaf arajfa arafja arafaj arfaaj arfaja arfaaj
arfaja arfjaa arfjaa afjara afjaar afjraa afjraa afjara afjaar afajra afajar
afarja afaraj afaarj afaajr afraja afraaj afrjaa afrjaa afraja afraaj afaarj
afaajr afaraj afarja afajra afajar

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

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