easy ciphers

Easy Ciphers Tools:
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aiguille

unexotic

boosters

jereld

headings

unpulled

minsk

telmatology

fraanky

fortpeck

validus

rionero

mamabear

squireless

blandinsville

alkahests

diripitis

livelily


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: rended
cipher variations:
sfoefe tgpfgf uhqghg virhih wjsiji
xktjkj yluklk zmvlml anwmnm boxnon
cpyopo dqzpqp eraqrq fsbrsr gtcsts
hudtut iveuvu jwfvwv kxgwxw lyhxyx
mziyzy najzaz obkaba pclbcb qdmcdc

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: rended
Cipher: ivmwvw

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: rended
Cipher: BAAAA AABAA ABBAA AAABB AABAA AAABB

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: rended
cipher variations:
sfoefe
anoknk
ivoqvq
qdowdw
yloclc
gtoiti
wjouju
eroara
mzogzg
uhomhm
cposps
kxoyxy
tgpfgf
boplol
jwprwr
repxex
zmpdmd
hupjuj
xkpvkv
fspbsb
naphah
vipnin
dqptqt
lypzyz
uhqghg
cpqmpm
kxqsxs
sfqyfy
anqene
ivqkvk
ylqwlw
gtqctc
obqibi
wjqojo
erquru
mzqaza
virhih
dqrnqn
lyrtyt
tgrzgz
borfof
jwrlwl
zmrxmx
hurdud
pcrjcj
xkrpkp
fsrvsv
narbab
wjsiji
ersoro
mzsuzu
uhsaha
cpsgpg
kxsmxm
ansyny
ivseve
qdskdk
ylsqlq
gtswtw
obscbc
xktjkj
fstpsp
natvav
vitbib
dqthqh
lytnyn
botzoz
jwtfwf
retlel
zmtrmr
hutxux
pctdcd
yluklk
gtuqtq
obuwbw
wjucjc
eruiri
mzuozo
cpuapa
kxugxg
sfumfm
anusns
ivuyvy
qduede
zmvlml
huvrur
pcvxcx
xkvdkd
fsvjsj
navpap
dqvbqb
lyvhyh
tgvngn
bovtot
jwvzwz
revfef
anwmnm
ivwsvs
qdwydy
ylwele
gtwktk
obwqbq
erwcrc
mzwizi
uhwoho
cpwupu
kxwaxa
sfwgfg
boxnon
jwxtwt
rexzez
zmxfmf
huxlul
pcxrcr
fsxdsd
naxjaj
vixpip
dqxvqv
lyxbyb
tgxhgh
cpyopo
kxyuxu
sfyafa
anygng
ivymvm
qdysds
gtyete
obykbk
wjyqjq
erywrw
mzyczc
uhyihi
dqzpqp
lyzvyv
tgzbgb
bozhoh
jwznwn
reztet
huzfuf
pczlcl
xkzrkr
fszxsx
nazdad
vizjij
eraqrq
mzawzw
uhachc
cpaipi
kxaoxo
sfaufu
ivagvg
qdamdm
ylasls
gtayty
obaebe
wjakjk
fsbrsr
nabxax
vibdid
dqbjqj
lybpyp
tgbvgv
jwbhwh
rebnen
zmbtmt
hubzuz
pcbfcf
xkblkl
gtcsts
obcyby
wjceje
erckrk
mzcqzq
uhcwhw
kxcixi
sfcofo
ancunu
ivcava
qdcgdg
ylcmlm
hudtut
pcdzcz
xkdfkf
fsdlsl
nadrar
vidxix
lydjyj
tgdpgp
bodvov
jwdbwb
redheh
zmdnmn
iveuvu
qdeada
yleglg
gtemtm
obesbs
wjeyjy
mzekzk
uheqhq
cpewpw
kxecxc
sfeifi
aneono
jwfvwv
refbeb
zmfhmh
hufnun
pcftct
xkfzkz
naflal
vifrir
dqfxqx
lyfdyd
tgfjgj
bofpop
kxgwxw
sfgcfc
angini
ivgovo
qdgudu
ylgala
obgmbm
wjgsjs
ergyry
mzgeze
uhgkhk
cpgqpq
lyhxyx
tghdgd
bohjoj
jwhpwp
rehvev
zmhbmb
pchncn
xkhtkt
fshzsz
nahfaf
vihlil
dqhrqr
mziyzy
uhiehe
cpikpk
kxiqxq
sfiwfw
anicnc
qdiodo
yliulu
gtiata
obigbg
wjimjm
erisrs
najzaz
vijfif
dqjlql
lyjryr
tgjxgx
bojdod
rejpep
zmjvmv
hujbub
pcjhch
xkjnkn
fsjtst
obkaba
wjkgjg
erkmrm
mzkszs
uhkyhy
cpkepe
sfkqfq
ankwnw
ivkcvc
qdkidi
ylkolo
gtkutu
pclbcb
xklhkh
fslnsn
naltat
vilziz
dqlfqf
tglrgr
bolxox
jwldwd
reljej
zmlpmp
hulvuv
qdmcdc
ylmili
gtmoto
obmubu
wjmaja
ermgrg
uhmshs
cpmypy
kxmexe
sfmkfk
anmqnq
ivmwvw
rended
zmnjmj
hunpup
pcnvcv
xknbkb
fsnhsh
vintit
dqnzqz
lynfyf
tgnlgl
bonror
jwnxwx

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: rended
Cipher: eraqrq

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: rended
Cipher: 245133415141

Extended Methods:
Method #1

Plaintext: rended
method variations:
wksikibpxopoguctutmzhyzy

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath: 
r e n d e d 
2 5 3 4 5 4 
4 1 3 1 1 1
They are then read out in rows:
253454413111
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: rended
Cipher: wsudca

Read more ...
Method #3

Plaintext: rended
method variations:
ylsvqf lsvqfy svqfyl
vqfyls qfylsv fylsvq

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: rended
all 720 cipher variations:
rended
rendde
renedd
renedd
rended
rendde
redned
rednde
redend
rededn
redden
reddne
reednd
reeddn
reendd
reendd
reednd
reeddn
redden
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rededn
redend
redned
rednde
rneded
rnedde
rneedd
rneedd
rneded
rnedde
rndeed
rndede
rndeed
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dredne
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drened
dreend
dreedn
dreden
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dreedn
dreend
drened
drende

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


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