easy ciphers

Easy Ciphers Tools:
cryptography lectures
popular ciphers:

lymphadenia

blaffert

uncanniness

deconvolve

bootikin

kiteflier

intercellular

megatype

sandyridge

chartchai

remotivating

scoundreldom

swillers

overplaced

ergatoid

faris

unimputed

shuhali


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: guglet
cipher variations:
hvhmfu iwingv jxjohw kykpix lzlqjy
mamrkz nbnsla ocotmb pdpunc qeqvod
rfrwpe sgsxqf thtyrg uiuzsh vjvati
wkwbuj xlxcvk ymydwl znzexm aoafyn
bpbgzo cqchap drdibq esejcr ftfkds

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: guglet
Cipher: tftovg

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: guglet
Cipher: AABBA BAABB AABBA ABABA AABAA BAABA

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: guglet
cipher variations:
hvhmfutjtingfxfevsrlradedzdwlqpnpstcnpnkjazdzgrm
lrlczyxfxyhkjtjupwvhvqxiiwingvukujohgygfwtsmsbef
eaexmrqoqtudoqolkbaeahsnmsmdazygyzilkukvqxwiwryj
jxjohwvlvkpihzhgxutntcfgfbfynsrpruveprpmlcbfbito
ntnebazhzajmlvlwryxjxszkkykpixwmwlqjiaihyvuoudgh
gcgzotsqsvwfqsqnmdcgcjupouofcbaiabknmwmxszykytal
lzlqjyxnxmrkjbjizwvpvehihdhaputrtwxgrtronedhdkvq
pvpgdcbjbclonxnytazlzubmmamrkzyoynslkckjaxwqwfij
ieibqvusuxyhsuspofeielwrqwqhedckcdmpoyozubamavcn
nbnslazpzotmldlkbyxrxgjkjfjcrwvtvyzitvtqpgfjfmxs
rxrifedldenqpzpavcbnbwdoocotmbaqapunmemlczysyhkl
kgkdsxwuwzajuwurqhgkgnytsysjgfemeforqaqbwdcocxep
pdpuncbrbqvonfnmdaztzilmlhletyxvxabkvxvsrihlhozu
tztkhgfnfgpsrbrcxedpdyfqqeqvodcscrwpogonebauajmn
mimfuzywybclwywtsjimipavuaulihgoghqtscsdyfeqezgr
rfrwpedtdsxqphpofcbvbknonjngvazxzcdmxzxutkjnjqbw
vbvmjihphirutdtezgfrfahssgsxqfeuetyrqiqpgdcwclop
okohwbayadenyayvulkokrcxwcwnkjiqijsvueufahgsgbit
thtyrgfvfuzsrjrqhedxdmpqplpixcbzbefozbzwvmlplsdy
xdxolkjrjktwvfvgbihthcjuuiuzshgwgvatsksrifeyenqr
qmqjydcacfgpacaxwnmqmtezyeypmlkskluxwgwhcjiuidkv
vjvatihxhwbutltsjgfzforsrnrkzedbdghqbdbyxonrnufa
zfzqnmltlmvyxhxidkjvjelwwkwbujiyixcvumutkhgagpst
soslafecehirceczyposovgbagaronmumnwzyiyjelkwkfmx
xlxcvkjzjydwvnvulihbhqtutptmbgfdfijsdfdazqptpwhc
bhbsponvnoxazjzkfmlxlgnyymydwlkakzexwowvmjiciruv
uqunchgegjktegebarquqxidcictqpowopybakalgnmymhoz
znzexmlblafyxpxwnkjdjsvwvrvodihfhklufhfcbsrvryje
djdurqpxpqzcblbmhonznipaaoafynmcmbgzyqyxolkektwx
wswpejigilmvgigdctswszkfekevsrqyqradcmcnipoaojqb
bpbgzondnchazrzypmlfluxyxtxqfkjhjmnwhjhedutxtalg
flfwtsrzrsbedndojqpbpkrccqchapoeodibasazqnmgmvyz
yuyrglkiknoxikifevuyubmhgmgxutsastcfeoepkrqcqlsd
drdibqpfpejcbtbaronhnwzazvzshmljlopyjljgfwvzvcni
hnhyvutbtudgfpfqlsrdrmteesejcrqgqfkdcucbspoioxab
awatinmkmpqzkmkhgxwawdojioizwvucuvehgqgrmtsesnuf
ftfkdsrhrgledvdctqpjpybcbxbujonlnqralnlihyxbxepk
jpjaxwvdvwfihrhsnutftovggugletsishmfewedurqkqzcd
cycvkpomorsbmomjizycyfqlkqkbyxwewxgjisitovugupwh

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: guglet
Cipher: thtyrg

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: guglet
Cipher: 225422135144

Extended Methods:
Method #1

Plaintext: guglet
method variations:
mzmqkyrervpdwkwauibpbfzo

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
g u g l e t 
2 5 2 1 5 4 
2 4 2 3 1 4 
They are then read out in rows:
252154242314
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: guglet
Cipher: wburmq

Read more ...
Method #3

Plaintext: guglet
method variations:
wibxqi ibxqiw bxqiwi
xqiwib qiwibx iwibxq

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: guglet

all 720 cipher variations:
guglet guglte gugelt gugetl gugtel gugtle gulget gulgte gulegt guletg gulteg
gultge guelgt gueltg gueglt guegtl guetgl guetlg gutleg gutlge gutelg gutegl
gutgel gutgle ggulet ggulte gguelt gguetl ggutel ggutle ggluet gglute ggleut
ggletu gglteu ggltue ggelut ggeltu ggeult ggeutl ggetul ggetlu ggtleu ggtlue
ggtelu ggteul ggtuel ggtule glguet glgute glgeut glgetu glgteu glgtue gluget
glugte gluegt gluetg gluteg glutge gleugt gleutg glegut glegtu gletgu gletug
gltueg gltuge glteug gltegu gltgeu gltgue geglut gegltu gegult gegutl gegtul
gegtlu gelgut gelgtu gelugt gelutg geltug geltgu geulgt geultg geuglt geugtl
geutgl geutlg getlug getlgu getulg getugl getgul getglu gtgleu gtglue gtgelu
gtgeul gtguel gtgule gtlgeu gtlgue gtlegu gtleug gtlueg gtluge gtelgu gtelug
gteglu gtegul gteugl gteulg gtuleg gtulge gtuelg gtuegl gtugel gtugle ugglet
ugglte uggelt uggetl uggtel uggtle uglget uglgte uglegt ugletg uglteg ugltge
ugelgt ugeltg ugeglt ugegtl ugetgl ugetlg ugtleg ugtlge ugtelg ugtegl ugtgel
ugtgle ugglet ugglte uggelt uggetl uggtel uggtle uglget uglgte uglegt ugletg
uglteg ugltge ugelgt ugeltg ugeglt ugegtl ugetgl ugetlg ugtleg ugtlge ugtelg
ugtegl ugtgel ugtgle ulgget ulggte ulgegt ulgetg ulgteg ulgtge ulgget ulggte
ulgegt ulgetg ulgteg ulgtge uleggt ulegtg uleggt ulegtg uletgg uletgg ultgeg
ultgge ultegg ultegg ultgeg ultgge ueglgt uegltg uegglt ueggtl uegtgl uegtlg
uelggt uelgtg uelggt uelgtg ueltgg ueltgg ueglgt uegltg uegglt ueggtl uegtgl
uegtlg uetlgg uetlgg uetglg uetggl uetggl uetglg utgleg utglge utgelg utgegl
utggel utggle utlgeg utlgge utlegg utlegg utlgeg utlgge utelgg utelgg uteglg
uteggl uteggl uteglg utgleg utglge utgelg utgegl utggel utggle guglet guglte
gugelt gugetl gugtel gugtle gulget gulgte gulegt guletg gulteg gultge guelgt
gueltg gueglt guegtl guetgl guetlg gutleg gutlge gutelg gutegl gutgel gutgle
ggulet ggulte gguelt gguetl ggutel ggutle ggluet gglute ggleut ggletu gglteu
ggltue ggelut ggeltu ggeult ggeutl ggetul ggetlu ggtleu ggtlue ggtelu ggteul
ggtuel ggtule glguet glgute glgeut glgetu glgteu glgtue gluget glugte gluegt
gluetg gluteg glutge gleugt gleutg glegut glegtu gletgu gletug gltueg gltuge
glteug gltegu gltgeu gltgue geglut gegltu gegult gegutl gegtul gegtlu gelgut
gelgtu gelugt gelutg geltug geltgu geulgt geultg geuglt geugtl geutgl geutlg
getlug getlgu getulg getugl getgul getglu gtgleu gtglue gtgelu gtgeul gtguel
gtgule gtlgeu gtlgue gtlegu gtleug gtlueg gtluge gtelgu gtelug gteglu gtegul
gteugl gteulg gtuleg gtulge gtuelg gtuegl gtugel gtugle lugget luggte lugegt
lugetg lugteg lugtge lugget luggte lugegt lugetg lugteg lugtge lueggt luegtg
lueggt luegtg luetgg luetgg lutgeg lutgge lutegg lutegg lutgeg lutgge lguget
lgugte lguegt lguetg lguteg lgutge lgguet lggute lggeut lggetu lggteu lggtue
lgegut lgegtu lgeugt lgeutg lgetug lgetgu lgtgeu lgtgue lgtegu lgteug lgtueg
lgtuge lgguet lggute lggeut lggetu lggteu lggtue lguget lgugte lguegt lguetg
lguteg lgutge lgeugt lgeutg lgegut lgegtu lgetgu lgetug lgtueg lgtuge lgteug
lgtegu lgtgeu lgtgue leggut leggtu legugt legutg legtug legtgu leggut leggtu
legugt legutg legtug legtgu leuggt leugtg leuggt leugtg leutgg leutgg letgug
letggu letugg letugg letgug letggu ltggeu ltggue ltgegu ltgeug ltgueg ltguge
ltggeu ltggue ltgegu ltgeug ltgueg ltguge lteggu ltegug lteggu ltegug lteugg
lteugg ltugeg ltugge ltuegg ltuegg ltugeg ltugge euglgt eugltg eugglt euggtl
eugtgl eugtlg eulggt eulgtg eulggt eulgtg eultgg eultgg euglgt eugltg eugglt
euggtl eugtgl eugtlg eutlgg eutlgg eutglg eutggl eutggl eutglg egulgt egultg
eguglt egugtl egutgl egutlg eglugt eglutg eglgut eglgtu egltgu egltug egglut
eggltu eggult eggutl eggtul eggtlu egtlgu egtlug egtglu egtgul egtugl egtulg
elgugt elgutg elggut elggtu elgtgu elgtug eluggt elugtg eluggt elugtg elutgg
elutgg elgugt elgutg elggut elggtu elgtgu elgtug eltugg eltugg eltgug eltggu
eltggu eltgug egglut eggltu eggult eggutl eggtul eggtlu eglgut eglgtu eglugt
eglutg egltug egltgu egulgt egultg eguglt egugtl egutgl egutlg egtlug egtlgu
egtulg egtugl egtgul egtglu etglgu etglug etgglu etggul etgugl etgulg etlggu
etlgug etlggu etlgug etlugg etlugg etglgu etglug etgglu etggul etgugl etgulg
etulgg etulgg etuglg etuggl etuggl etuglg tugleg tuglge tugelg tugegl tuggel
tuggle tulgeg tulgge tulegg tulegg tulgeg tulgge tuelgg tuelgg tueglg tueggl
tueggl tueglg tugleg tuglge tugelg tugegl tuggel tuggle tguleg tgulge tguelg
tguegl tgugel tgugle tglueg tgluge tgleug tglegu tglgeu tglgue tgelug tgelgu
tgeulg tgeugl tgegul tgeglu tggleu tgglue tggelu tggeul tgguel tggule tlgueg
tlguge tlgeug tlgegu tlggeu tlggue tlugeg tlugge tluegg tluegg tlugeg tlugge
tleugg tleugg tlegug tleggu tleggu tlegug tlgueg tlguge tlgeug tlgegu tlggeu
tlggue teglug teglgu tegulg tegugl teggul tegglu telgug telggu telugg telugg
telgug telggu teulgg teulgg teuglg teuggl teuggl teuglg teglug teglgu tegulg
tegugl teggul tegglu tggleu tgglue tggelu tggeul tgguel tggule tglgeu tglgue
tglegu tgleug tglueg tgluge tgelgu tgelug tgeglu tgegul tgeugl tgeulg tguleg
tgulge tguelg tguegl tgugel tgugle

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

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