easy ciphers

Easy Ciphers Tools:
cryptography lectures
popular ciphers:

combing

jenne

miserandaque

digladio

chartings

labavisse

delinda

egyptize

revestiary

dysgenical

idolothyte

eutannin

nonordination

trichosarcina

disfurnish

incorruptibilities

primiano

namaquan


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: queeve
cipher variations:
rvffwf swggxg txhhyh uyiizi vzjjaj
wakkbk xbllcl ycmmdm zdnnen aeoofo
bfppgp cgqqhq dhrrir eissjs fjttkt
gkuulu hlvvmv imwwnw jnxxox koyypy
lpzzqz mqaara nrbbsb oscctc ptddud

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: queeve
Cipher: jfvvev

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: queeve
Cipher: ABBBB BAABB AABAA AABAA BBBAB AABAA

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: queeve
cipher variations:
rvffwfxjnnmndxvvcvjlddsdpzllilvnttythpjjejndrrur
trzzkzzfhhahftppqplhxxgxswggxgykoonoeywwdwkmeete
qammjmwouuzuiqkkfkoessvsusaalaagiibiguqqrqmiyyhy
txhhyhzlppopfzxxexlnffufrbnnknxpvvavjrllglpfttwt
vtbbmbbhjjcjhvrrsrnjzzizuyiiziamqqpqgayyfymoggvg
scooloyqwwbwksmmhmqguuxuwuccnccikkdkiwsstsokaaja
vzjjajbnrrqrhbzzgznphhwhtdppmpzrxxcxltnninrhvvyv
xvddoddjlleljxttutplbbkbwakkbkcossrsicaahaoqiixi
ueqqnqasyydymuoojosiwwzwyweepeekmmfmkyuuvuqmcclc
xbllcldpttstjdbbibprjjyjvfrrorbtzzeznvppkptjxxax
zxffqfflnngnlzvvwvrnddmdycmmdmequutukeccjcqskkzk
wgsspscuaafaowqqlqukyybyayggrggmoohomawwxwsoeene
zdnnenfrvvuvlfddkdrtllalxhttqtdvbbgbpxrrmrvlzzcz
bzhhshhnppipnbxxyxtpffofaeoofogswwvwmgeelesummbm
yiuuruewcchcqyssnswmaadacaiitiioqqjqocyyzyuqggpg
bfppgphtxxwxnhffmftvnncnzjvvsvfxddidrzttotxnbbeb
dbjjujjprrkrpdzzazvrhhqhcgqqhqiuyyxyoiggnguwoodo
akwwtwgyeejesauupuyoccfceckkvkkqsslsqeaabawsiiri
dhrrirjvzzyzpjhhohvxppepblxxuxhzffkftbvvqvzpddgd
fdllwllrttmtrfbbcbxtjjsjeissjskwaazaqkiipiwyqqfq
cmyyvyiagglgucwwrwaqeehegemmxmmsuunusgccdcyukktk
fjttktlxbbabrljjqjxzrrgrdnzzwzjbhhmhvdxxsxbrffif
hfnnynntvvovthddedzvllulgkuulumyccbcsmkkrkyasshs
eoaaxakciiniweyytycsggjgigoozoouwwpwuieefeawmmvm
hlvvmvnzddcdtnllslzbttitfpbbybldjjojxfzzuzdthhkh
jhppappvxxqxvjffgfbxnnwnimwwnwoaeedeuommtmacuuju
gqcczcmekkpkygaavaeuiilikiqqbqqwyyrywkgghgcyooxo
jnxxoxpbffefvpnnunbdvvkvhrddadnfllqlzhbbwbfvjjmj
ljrrcrrxzzszxlhhihdzppypkoyypyqcggfgwqoovocewwlw
iseebeogmmrmaiccxcgwkknkmkssdssyaataymiijieaqqzq
lpzzqzrdhhghxrppwpdfxxmxjtffcfphnnsnbjddydhxllol
nlttettzbbubznjjkjfbrrarmqaaraseiihiysqqxqegyyny
kuggdgqiootockeezeiymmpmomuufuuaccvcaokklkgcssbs
nrbbsbtfjjijztrryrfhzzozlvhhehrjppupdlffafjznnqn
pnvvgvvbddwdbpllmlhdttctoscctcugkkjkausszsgiaapa
mwiifiskqqvqemggbgkaooroqowwhwwceexecqmmnmieuudu
ptddudvhllklbvttathjbbqbnxjjgjtlrrwrfnhhchlbppsp
rpxxixxdffyfdrnnonjfvvevqueevewimmlmcwuubuikccrc
oykkhkumssxsgoiidimcqqtqsqyyjyyeggzgesoopokgwwfw

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: queeve
Cipher: dhrrir

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: queeve
Cipher: 145451511551

Extended Methods:
Method #1

Plaintext: queeve
method variations:
vzkkakaeppfpfkuululpzzqz

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
q u e e v e 
1 5 5 5 1 5 
4 4 1 1 5 1 
They are then read out in rows:
155515441151
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: queeve
Cipher: vzvtae

Read more ...
Method #3

Plaintext: queeve
method variations:
yyvaza yvazay vazayy
azayyv zayyva ayyvaz

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: queeve

all 720 cipher variations:
queeve queeev quevee quevee queeve queeev queeve queeev quevee quevee queeve
queeev quveee quveee quveee quveee quveee quveee queeve queeev quevee quevee
queeve queeev qeueve qeueev qeuvee qeuvee qeueve qeueev qeeuve qeeuev qeevue
qeeveu qeeevu qeeeuv qeveue qeveeu qevuee qevuee qeveue qeveeu qeeevu qeeeuv
qeeveu qeevue qeeuve qeeuev qeeuve qeeuev qeevue qeeveu qeeevu qeeeuv qeueve
qeueev qeuvee qeuvee qeueve qeueev qevuee qevuee qeveue qeveeu qeveeu qeveue
qeeuve qeeuev qeevue qeeveu qeeevu qeeeuv qveeue qveeeu qveuee qveuee qveeue
qveeeu qveeue qveeeu qveuee qveuee qveeue qveeeu qvueee qvueee qvueee qvueee
qvueee qvueee qveeue qveeeu qveuee qveuee qveeue qveeeu qeeevu qeeeuv qeeveu
qeevue qeeuve qeeuev qeeevu qeeeuv qeeveu qeevue qeeuve qeeuev qeveeu qeveue
qeveeu qeveue qevuee qevuee qeueve qeueev qeuvee qeuvee qeueve qeueev uqeeve
uqeeev uqevee uqevee uqeeve uqeeev uqeeve uqeeev uqevee uqevee uqeeve uqeeev
uqveee uqveee uqveee uqveee uqveee uqveee uqeeve uqeeev uqevee uqevee uqeeve
uqeeev ueqeve ueqeev ueqvee ueqvee ueqeve ueqeev ueeqve ueeqev ueevqe ueeveq
ueeevq ueeeqv ueveqe ueveeq uevqee uevqee ueveqe ueveeq ueeevq ueeeqv ueeveq
ueevqe ueeqve ueeqev ueeqve ueeqev ueevqe ueeveq ueeevq ueeeqv ueqeve ueqeev
ueqvee ueqvee ueqeve ueqeev uevqee uevqee ueveqe ueveeq ueveeq ueveqe ueeqve
ueeqev ueevqe ueeveq ueeevq ueeeqv uveeqe uveeeq uveqee uveqee uveeqe uveeeq
uveeqe uveeeq uveqee uveqee uveeqe uveeeq uvqeee uvqeee uvqeee uvqeee uvqeee
uvqeee uveeqe uveeeq uveqee uveqee uveeqe uveeeq ueeevq ueeeqv ueeveq ueevqe
ueeqve ueeqev ueeevq ueeeqv ueeveq ueevqe ueeqve ueeqev ueveeq ueveqe ueveeq
ueveqe uevqee uevqee ueqeve ueqeev ueqvee ueqvee ueqeve ueqeev euqeve euqeev
euqvee euqvee euqeve euqeev eueqve eueqev euevqe eueveq eueevq eueeqv euveqe
euveeq euvqee euvqee euveqe euveeq eueevq eueeqv eueveq euevqe eueqve eueqev
equeve equeev equvee equvee equeve equeev eqeuve eqeuev eqevue eqeveu eqeevu
eqeeuv eqveue eqveeu eqvuee eqvuee eqveue eqveeu eqeevu eqeeuv eqeveu eqevue
eqeuve eqeuev eequve eequev eeqvue eeqveu eeqevu eeqeuv eeuqve eeuqev eeuvqe
eeuveq eeuevq eeueqv eevuqe eevueq eevque eevqeu eevequ eeveuq eeeuvq eeeuqv
eeevuq eeevqu eeeqvu eeequv evqeue evqeeu evquee evquee evqeue evqeeu eveque
eveqeu eveuqe eveueq eveeuq eveequ evueqe evueeq evuqee evuqee evueqe evueeq
eveeuq eveequ eveueq eveuqe eveque eveqeu eeqevu eeqeuv eeqveu eeqvue eequve
eequev eeeqvu eeequv eeevqu eeevuq eeeuvq eeeuqv eevequ eeveuq eevqeu eevque
eevuqe eevueq eeuevq eeueqv eeuveq eeuvqe eeuqve eeuqev eueqve eueqev euevqe
eueveq eueevq eueeqv euqeve euqeev euqvee euqvee euqeve euqeev euvqee euvqee
euveqe euveeq euveeq euveqe eueqve eueqev euevqe eueveq eueevq eueeqv eeuqve
eeuqev eeuvqe eeuveq eeuevq eeueqv eequve eequev eeqvue eeqveu eeqevu eeqeuv
eevque eevqeu eevuqe eevueq eeveuq eevequ eeeqvu eeequv eeevqu eeevuq eeeuvq
eeeuqv eqeuve eqeuev eqevue eqeveu eqeevu eqeeuv equeve equeev equvee equvee
equeve equeev eqvuee eqvuee eqveue eqveeu eqveeu eqveue eqeuve eqeuev eqevue
eqeveu eqeevu eqeeuv eveque eveqeu eveuqe eveueq eveeuq eveequ evqeue evqeeu
evquee evquee evqeue evqeeu evuqee evuqee evueqe evueeq evueeq evueqe eveque
eveqeu eveuqe eveueq eveeuq eveequ eeeqvu eeequv eeevqu eeevuq eeeuvq eeeuqv
eeqevu eeqeuv eeqveu eeqvue eequve eequev eevqeu eevque eevequ eeveuq eevueq
eevuqe eeuqve eeuqev eeuvqe eeuveq eeuevq eeueqv vueeqe vueeeq vueqee vueqee
vueeqe vueeeq vueeqe vueeeq vueqee vueqee vueeqe vueeeq vuqeee vuqeee vuqeee
vuqeee vuqeee vuqeee vueeqe vueeeq vueqee vueqee vueeqe vueeeq veueqe veueeq
veuqee veuqee veueqe veueeq veeuqe veeueq veeque veeqeu veeequ veeeuq veqeue
veqeeu vequee vequee veqeue veqeeu veeequ veeeuq veeqeu veeque veeuqe veeueq
veeuqe veeueq veeque veeqeu veeequ veeeuq veueqe veueeq veuqee veuqee veueqe
veueeq vequee vequee veqeue veqeeu veqeeu veqeue veeuqe veeueq veeque veeqeu
veeequ veeeuq vqeeue vqeeeu vqeuee vqeuee vqeeue vqeeeu vqeeue vqeeeu vqeuee
vqeuee vqeeue vqeeeu vqueee vqueee vqueee vqueee vqueee vqueee vqeeue vqeeeu
vqeuee vqeuee vqeeue vqeeeu veeequ veeeuq veeqeu veeque veeuqe veeueq veeequ
veeeuq veeqeu veeque veeuqe veeueq veqeeu veqeue veqeeu veqeue vequee vequee
veueqe veueeq veuqee veuqee veueqe veueeq eueevq eueeqv eueveq euevqe eueqve
eueqev eueevq eueeqv eueveq euevqe eueqve eueqev euveeq euveqe euveeq euveqe
euvqee euvqee euqeve euqeev euqvee euqvee euqeve euqeev eeuevq eeueqv eeuveq
eeuvqe eeuqve eeuqev eeeuvq eeeuqv eeevuq eeevqu eeeqvu eeequv eeveuq eevequ
eevueq eevuqe eevque eevqeu eeqevu eeqeuv eeqveu eeqvue eequve eequev eeeuvq
eeeuqv eeevuq eeevqu eeeqvu eeequv eeuevq eeueqv eeuveq eeuvqe eeuqve eeuqev
eevueq eevuqe eeveuq eevequ eevqeu eevque eequve eequev eeqvue eeqveu eeqevu
eeqeuv eveeuq eveequ eveueq eveuqe eveque eveqeu eveeuq eveequ eveueq eveuqe
eveque eveqeu evueeq evueqe evueeq evueqe evuqee evuqee evqeue evqeeu evquee
evquee evqeue evqeeu eqeevu eqeeuv eqeveu eqevue eqeuve eqeuev eqeevu eqeeuv
eqeveu eqevue eqeuve eqeuev eqveeu eqveue eqveeu eqveue eqvuee eqvuee equeve
equeev equvee equvee equeve equeev

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

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