easy ciphers

Easy Ciphers Tools:
cryptography lectures
popular ciphers:

veneziana

unpollutedly

suppliants

edeoscopy

kondagunta

schmiege

kuczynski

linearize

wheels

leibert

tennessee

vassiliev

unpierced

carrus

temptemque

poons

tormen

rodenbaugh


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: mukund
cipher variations:
nvlvoe owmwpf pxnxqg qyoyrh rzpzsi
saqatj tbrbuk ucscvl vdtdwm weuexn
xfvfyo ygwgzp zhxhaq aiyibr bjzjcs
ckakdt dlbleu emcmfv fndngw goeohx
hpfpiy iqgqjz jrhrka ksislb ltjtmc

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: mukund
Cipher: nfpfmw

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: mukund
Cipher: ABABB BAABB ABAAB BAABB ABBAA 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: mukund
cipher variations:
nvlvoeljfjokjxzxoqhltlowfznzocdnhnoizpvpouxdpdoa
vrjrogtfdfomrtxtosphrhoyowmwpfmkgkplkyayprimumpx
gaoapdeoiopjaqwqpvyeqepbwsksphugegpnsuyuptqisipz
pxnxqgnlhlqmlzbzqsjnvnqyhbpbqefpjpqkbrxrqwzfrfqc
xtltqivhfhqotvzvqurjtjqaqyoyrhomimrnmacartkoworz
icqcrfgqkqrlcsysrxagsgrdyumurjwigirpuwawrvskukrb
rzpzsipnjnsonbdbsulpxpsajdrdsghrlrsmdtztsybhthse
zvnvskxjhjsqvxbxswtlvlscsaqatjqokotpocectvmqyqtb
kesethismstneuautzciuitfawowtlykiktrwycytxumwmtd
tbrbukrplpuqpdfduwnrzruclftfuijtntuofvbvuadjvjug
bxpxumzljlusxzdzuyvnxnueucscvlsqmqvrqegevxosasvd
mgugvjkuouvpgwcwvbekwkvhcyqyvnamkmvtyaeavzwoyovf
vdtdwmtrnrwsrfhfwyptbtwenhvhwklvpvwqhxdxwcflxlwi
dzrzwobnlnwuzbfbwaxpzpwgweuexnusosxtsgigxzqucuxf
oiwixlmwqwxriyeyxdgmymxjeasaxpcomoxvacgcxbyqaqxh
xfvfyovtptyuthjhyarvdvygpjxjymnxrxysjzfzyehnznyk
fbtbyqdpnpywbdhdyczrbryiygwgzpwuquzvuikizbswewzh
qkykznoysyztkagazfioaozlgcuczreqoqzxceiezdascszj
zhxhaqxvrvawvjljactxfxairlzlaopztzaulbhbagjpbpam
hdvdasfrpraydfjfaebtdtakaiyibrywswbxwkmkbduygybj
smambpqauabvmcicbhkqcqbniewebtgsqsbzegkgbfcueubl
bjzjcszxtxcyxlnlcevzhzcktnbncqrbvbcwndjdcilrdrco
jfxfcuhtrtcafhlhcgdvfvcmckakdtayuydzymomdfwaiadl
uocodrscwcdxoekedjmsesdpkgygdviusudbgimidhewgwdn
dlbleubzvzeaznpnegxbjbemvpdpestdxdeypflfekntfteq
lhzhewjvtvechjnjeifxhxeoemcmfvcawafbaoqofhyckcfn
wqeqftueyefzqgmgflougufrmiaifxkwuwfdikokfjgyiyfp
fndngwdbxbgcbprpgizdldgoxrfrguvfzfgarhnhgmpvhvgs
njbjgylxvxgejlplgkhzjzgqgoeohxecychdcqsqhjaemehp
ysgshvwgaghbsioihnqwiwhtokckhzmywyhfkmqmhliakahr
hpfpiyfdzdiedrtrikbfnfiqzthtiwxhbhictjpjiorxjxiu
pldlianzxziglnrnimjblbisiqgqjzgeaejfesusjlcgogjr
auiujxyicijdukqkjpsykyjvqmemjboayajhmosojnkcmcjt
jrhrkahfbfkgftvtkmdhphksbvjvkyzjdjkevlrlkqtzlzkw
rnfnkcpbzbkinptpkoldndkuksislbigcglhguwulneiqilt
cwkwlzakeklfwmsmlruamalxsogoldqcacljoquqlpmeoelv
ltjtmcjhdhmihvxvmofjrjmudxlxmablflmgxntnmsvbnbmy
tphpmerdbdmkprvrmqnfpfmwmukundkieinjiwywnpgksknv
eymynbcmgmnhyouontwcocnzuqiqnfsecenlqswsnrogqgnx

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: mukund
Cipher: zhxhaq

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: mukund
Cipher: 235452543341

Extended Methods:
Method #1

Plaintext: mukund
method variations:
rzpzsiweuexobkzkctgpephy

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
m u k u n d 
2 5 5 5 3 4 
3 4 2 4 3 1 
They are then read out in rows:
255534342431
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: mukund
Cipher: wzssrc

Read more ...
Method #3

Plaintext: mukund
method variations:
xywosf ywosfx wosfxy
osfxyw sfxywo fxywos

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: mukund

all 720 cipher variations:
mukund mukudn muknud mukndu mukdnu mukdun muuknd muukdn muunkd muundk muudnk
muudkn munukd munudk munkud munkdu mundku munduk mudunk mudukn mudnuk mudnku
mudknu mudkun mkuund mkuudn mkunud mkundu mkudnu mkudun mkuund mkuudn mkunud
mkundu mkudnu mkudun mknuud mknudu mknuud mknudu mknduu mknduu mkdunu mkduun
mkdnuu mkdnuu mkdunu mkduun mukund mukudn muknud mukndu mukdnu mukdun muuknd
muukdn muunkd muundk muudnk muudkn munukd munudk munkud munkdu mundku munduk
mudunk mudukn mudnuk mudnku mudknu mudkun mnkuud mnkudu mnkuud mnkudu mnkduu
mnkduu mnukud mnukdu mnuukd mnuudk mnuduk mnudku mnuukd mnuudk mnukud mnukdu
mnudku mnuduk mnduuk mnduku mnduuk mnduku mndkuu mndkuu mdkunu mdkuun mdknuu
mdknuu mdkunu mdkuun mduknu mdukun mdunku mdunuk mduunk mduukn mdnuku mdnuuk
mdnkuu mdnkuu mdnuku mdnuuk mduunk mduukn mdunuk mdunku mduknu mdukun umkund
umkudn umknud umkndu umkdnu umkdun umuknd umukdn umunkd umundk umudnk umudkn
umnukd umnudk umnkud umnkdu umndku umnduk umdunk umdukn umdnuk umdnku umdknu
umdkun ukmund ukmudn ukmnud ukmndu ukmdnu ukmdun ukumnd ukumdn ukunmd ukundm
ukudnm ukudmn uknumd uknudm uknmud uknmdu ukndmu ukndum ukdunm ukdumn ukdnum
ukdnmu ukdmnu ukdmun uukmnd uukmdn uuknmd uukndm uukdnm uukdmn uumknd uumkdn
uumnkd uumndk uumdnk uumdkn uunmkd uunmdk uunkmd uunkdm uundkm uundmk uudmnk
uudmkn uudnmk uudnkm uudknm uudkmn unkumd unkudm unkmud unkmdu unkdmu unkdum
unukmd unukdm unumkd unumdk unudmk unudkm unmukd unmudk unmkud unmkdu unmdku
unmduk undumk undukm undmuk undmku undkmu undkum udkunm udkumn udknum udknmu
udkmnu udkmun uduknm udukmn udunkm udunmk udumnk udumkn udnukm udnumk udnkum
udnkmu udnmku udnmuk udmunk udmukn udmnuk udmnku udmknu udmkun kumund kumudn
kumnud kumndu kumdnu kumdun kuumnd kuumdn kuunmd kuundm kuudnm kuudmn kunumd
kunudm kunmud kunmdu kundmu kundum kudunm kudumn kudnum kudnmu kudmnu kudmun
kmuund kmuudn kmunud kmundu kmudnu kmudun kmuund kmuudn kmunud kmundu kmudnu
kmudun kmnuud kmnudu kmnuud kmnudu kmnduu kmnduu kmdunu kmduun kmdnuu kmdnuu
kmdunu kmduun kumund kumudn kumnud kumndu kumdnu kumdun kuumnd kuumdn kuunmd
kuundm kuudnm kuudmn kunumd kunudm kunmud kunmdu kundmu kundum kudunm kudumn
kudnum kudnmu kudmnu kudmun knmuud knmudu knmuud knmudu knmduu knmduu knumud
knumdu knuumd knuudm knudum knudmu knuumd knuudm knumud knumdu knudmu knudum
knduum kndumu knduum kndumu kndmuu kndmuu kdmunu kdmuun kdmnuu kdmnuu kdmunu
kdmuun kdumnu kdumun kdunmu kdunum kduunm kduumn kdnumu kdnuum kdnmuu kdnmuu
kdnumu kdnuum kduunm kduumn kdunum kdunmu kdumnu kdumun uukmnd uukmdn uuknmd
uukndm uukdnm uukdmn uumknd uumkdn uumnkd uumndk uumdnk uumdkn uunmkd uunmdk
uunkmd uunkdm uundkm uundmk uudmnk uudmkn uudnmk uudnkm uudknm uudkmn ukumnd
ukumdn ukunmd ukundm ukudnm ukudmn ukmund ukmudn ukmnud ukmndu ukmdnu ukmdun
uknmud uknmdu uknumd uknudm ukndum ukndmu ukdmnu ukdmun ukdnmu ukdnum ukdunm
ukdumn umkund umkudn umknud umkndu umkdnu umkdun umuknd umukdn umunkd umundk
umudnk umudkn umnukd umnudk umnkud umnkdu umndku umnduk umdunk umdukn umdnuk
umdnku umdknu umdkun unkmud unkmdu unkumd unkudm unkdum unkdmu unmkud unmkdu
unmukd unmudk unmduk unmdku unumkd unumdk unukmd unukdm unudkm unudmk undmuk
undmku undumk undukm undkum undkmu udkmnu udkmun udknmu udknum udkunm udkumn
udmknu udmkun udmnku udmnuk udmunk udmukn udnmku udnmuk udnkmu udnkum udnukm
udnumk udumnk udumkn udunmk udunkm uduknm udukmn nukumd nukudm nukmud nukmdu
nukdmu nukdum nuukmd nuukdm nuumkd nuumdk nuudmk nuudkm numukd numudk numkud
numkdu numdku numduk nudumk nudukm nudmuk nudmku nudkmu nudkum nkuumd nkuudm
nkumud nkumdu nkudmu nkudum nkuumd nkuudm nkumud nkumdu nkudmu nkudum nkmuud
nkmudu nkmuud nkmudu nkmduu nkmduu nkdumu nkduum nkdmuu nkdmuu nkdumu nkduum
nukumd nukudm nukmud nukmdu nukdmu nukdum nuukmd nuukdm nuumkd nuumdk nuudmk
nuudkm numukd numudk numkud numkdu numdku numduk nudumk nudukm nudmuk nudmku
nudkmu nudkum nmkuud nmkudu nmkuud nmkudu nmkduu nmkduu nmukud nmukdu nmuukd
nmuudk nmuduk nmudku nmuukd nmuudk nmukud nmukdu nmudku nmuduk nmduuk nmduku
nmduuk nmduku nmdkuu nmdkuu ndkumu ndkuum ndkmuu ndkmuu ndkumu ndkuum ndukmu
ndukum ndumku ndumuk nduumk nduukm ndmuku ndmuuk ndmkuu ndmkuu ndmuku ndmuuk
nduumk nduukm ndumuk ndumku ndukmu ndukum dukunm dukumn duknum duknmu dukmnu
dukmun duuknm duukmn duunkm duunmk duumnk duumkn dunukm dunumk dunkum dunkmu
dunmku dunmuk dumunk dumukn dumnuk dumnku dumknu dumkun dkuunm dkuumn dkunum
dkunmu dkumnu dkumun dkuunm dkuumn dkunum dkunmu dkumnu dkumun dknuum dknumu
dknuum dknumu dknmuu dknmuu dkmunu dkmuun dkmnuu dkmnuu dkmunu dkmuun dukunm
dukumn duknum duknmu dukmnu dukmun duuknm duukmn duunkm duunmk duumnk duumkn
dunukm dunumk dunkum dunkmu dunmku dunmuk dumunk dumukn dumnuk dumnku dumknu
dumkun dnkuum dnkumu dnkuum dnkumu dnkmuu dnkmuu dnukum dnukmu dnuukm dnuumk
dnumuk dnumku dnuukm dnuumk dnukum dnukmu dnumku dnumuk dnmuuk dnmuku dnmuuk
dnmuku dnmkuu dnmkuu dmkunu dmkuun dmknuu dmknuu dmkunu dmkuun dmuknu dmukun
dmunku dmunuk dmuunk dmuukn dmnuku dmnuuk dmnkuu dmnkuu dmnuku dmnuuk dmuunk
dmuukn dmunuk dmunku dmuknu dmukun

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

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