easy ciphers

Easy Ciphers Tools:
cryptography lectures
popular ciphers:

calorist

unpolarizable

uncompounding

agrufe

bartosch

washiest

zanzibari

shipbuilding

malita

serpenti

cryptogamy

sporozoon

unallayably

acroleins

uninurned

cruente

sennegrass

groats


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: mollie
cipher variations:
npmmjf oqnnkg proolh qsppmi rtqqnj
surrok tvsspl uwttqm vxuurn wyvvso
xzwwtp yaxxuq zbyyvr aczzws bdaaxt
cebbyu dfcczv egddaw fheebx giffcy
hjggdz ikhhea jliifb kmjjgc lnkkhd

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: mollie
Cipher: nloorv

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: mollie
Cipher: ABABB ABBAB ABABA ABABA ABAAA 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: mollie
cipher variations:
npmmjflriiznjteepvhvaafdfxwwvldzssltzdkkrjxfgghr
vhccxztjyynhrluudppnqqtxoqnnkgmsjjaokuffqwiwbbge
gyxxwmeattmuaellskyghhiswiddyaukzzoismvveqqorruy
proolhntkkbplvggrxjxcchfhzyyxnfbuunvbfmmtlzhiijt
xjeezbvlaapjtnwwfrrpssvzqsppmioullcqmwhhsykyddig
iazzyogcvvowcgnnumaijjkuykffacwmbbqkuoxxgssqttwa
rtqqnjpvmmdrnxiitzlzeejhjbaazphdwwpxdhoovnbjkklv
zlggbdxnccrlvpyyhttruuxbsurrokqwnnesoyjjuamaffki
kcbbaqiexxqyeippwockllmwamhhceyoddsmwqzziuusvvyc
tvssplrxooftpzkkvbnbggljldccbrjfyyrzfjqqxpdlmmnx
bniidfzpeetnxraajvvtwwzduwttqmsyppguqallwcochhmk
meddcskgzzsagkrryqemnnoycojjegaqffuoysbbkwwuxxae
vxuurntzqqhvrbmmxdpdiinlnfeedtlhaatbhlsszrfnoopz
dpkkfhbrggvpztcclxxvyybfwyvvsouarriwscnnyeqejjom
ogffeumibbucimttasgoppqaeqllgicshhwqauddmyywzzcg
xzwwtpvbssjxtdoozfrfkkpnphggfvnjccvdjnuubthpqqrb
frmmhjdtiixrbveenzzxaadhyaxxuqwcttkyueppagsgllqo
qihhgwokddwekovvcuiqrrscgsnnikeujjyscwffoaaybbei
zbyyvrxduulzvfqqbhthmmrprjiihxpleexflpwwdvjrsstd
htoojlfvkkztdxggpbbzccfjaczzwsyevvmawgrrciuinnsq
skjjiyqmffygmqxxewksttueiuppkmgwllaueyhhqccaddgk
bdaaxtzfwwnbxhssdjvjootrtlkkjzrnggzhnryyfxltuuvf
jvqqlnhxmmbvfziirddbeehlcebbyuagxxocyittekwkppus
umllkasohhaioszzgymuvvwgkwrrmoiynncwgajjseecffim
dfcczvbhyypdzjuuflxlqqvtvnmmlbtpiibjptaahznvwwxh
lxssnpjzoodxhbkktffdggjnegddawcizzqeakvvgmymrrwu
wonnmcuqjjckqubbiaowxxyimyttoqkappeyiclluggehhko
fheebxdjaarfblwwhnznssxvxpoondvrkkdlrvccjbpxyyzj
nzuuprlbqqfzjdmmvhhfiilpgiffcyekbbsgcmxxioaottyw
yqppoewsllemswddkcqyzzakoavvqsmcrrgakennwiigjjmq
hjggdzflccthdnyyjpbpuuzxzrqqpfxtmmfntxeeldrzaabl
pbwwrtndsshblfooxjjhkknrikhheagmdduieozzkqcqvvay
asrrqgyunngouyffmesabbcmqcxxsuoetticmgppykkillos
jliifbhneevjfpaalrdrwwbzbtssrhzvoohpvzggnftbccdn
rdyytvpfuujdnhqqzlljmmptkmjjgcioffwkgqbbmsesxxca
cuttsiawppiqwahhogucddeosezzuwqgvvkeoirrammknnqu
lnkkhdjpggxlhrccntftyydbdvuutjbxqqjrxbiiphvdeefp
tfaavxrhwwlfpjssbnnloorvmolliekqhhymisddouguzzec
ewvvukcyrrksycjjqiweffgqugbbwysixxmgqkttcoomppsw

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: mollie
Cipher: zbyyvr

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: mollie
Cipher: 234313134251

Extended Methods:
Method #1

Plaintext: mollie
method variations:
rtqqokwyvvtpbdaayugiffdz

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
m o l l i e 
2 4 1 1 4 5 
3 3 3 3 2 1 
They are then read out in rows:
241145333321
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: mollie
Cipher: raynnb

Read more ...
Method #3

Plaintext: mollie
method variations:
sccswf ccswfs cswfsc
swfscc wfsccs fsccsw

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: mollie

all 720 cipher variations:
mollie mollei molile moliel moleil moleli mollie mollei molile moliel moleil
moleli moille moilel moille moilel moiell moiell moelil moelli moeill moeill
moelil moelli mlolie mlolei mloile mloiel mloeil mloeli mlloie mlloei mllioe
mllieo mlleio mlleoi mliloe mlileo mliole mlioel mlieol mlielo mlelio mleloi
mleilo mleiol mleoil mleoli mlloie mlloei mllioe mllieo mlleio mlleoi mlolie
mlolei mloile mloiel mloeil mloeli mliole mlioel mliloe mlileo mlielo mlieol
mleoil mleoli mleiol mleilo mlelio mleloi milloe milleo milole miloel mileol
milelo milloe milleo milole miloel mileol milelo miolle miolel miolle miolel
mioell mioell mielol miello mieoll mieoll mielol miello mellio melloi melilo
meliol meloil meloli mellio melloi melilo meliol meloil meloli meillo meilol
meillo meilol meioll meioll meolil meolli meoill meoill meolil meolli omllie
omllei omlile omliel omleil omleli omllie omllei omlile omliel omleil omleli
omille omilel omille omilel omiell omiell omelil omelli omeill omeill omelil
omelli olmlie olmlei olmile olmiel olmeil olmeli ollmie ollmei ollime olliem
olleim ollemi olilme olilem olimle olimel olieml olielm olelim olelmi oleilm
oleiml olemil olemli ollmie ollmei ollime olliem olleim ollemi olmlie olmlei
olmile olmiel olmeil olmeli olimle olimel olilme olilem olielm olieml olemil
olemli oleiml oleilm olelim olelmi oillme oillem oilmle oilmel oileml oilelm
oillme oillem oilmle oilmel oileml oilelm oimlle oimlel oimlle oimlel oimell
oimell oielml oiellm oiemll oiemll oielml oiellm oellim oellmi oelilm oeliml
oelmil oelmli oellim oellmi oelilm oeliml oelmil oelmli oeillm oeilml oeillm
oeilml oeimll oeimll oemlil oemlli oemill oemill oemlil oemlli lomlie lomlei
lomile lomiel lomeil lomeli lolmie lolmei lolime loliem loleim lolemi loilme
loilem loimle loimel loieml loielm loelim loelmi loeilm loeiml loemil loemli
lmolie lmolei lmoile lmoiel lmoeil lmoeli lmloie lmloei lmlioe lmlieo lmleio
lmleoi lmiloe lmileo lmiole lmioel lmieol lmielo lmelio lmeloi lmeilo lmeiol
lmeoil lmeoli llmoie llmoei llmioe llmieo llmeio llmeoi llomie llomei lloime
lloiem lloeim lloemi lliome llioem llimoe llimeo lliemo llieom lleoim lleomi
lleiom lleimo llemio llemoi limloe limleo limole limoel limeol limelo lilmoe
lilmeo lilome liloem lileom lilemo liolme liolem liomle liomel lioeml lioelm
lielom lielmo lieolm lieoml liemol liemlo lemlio lemloi lemilo lemiol lemoil
lemoli lelmio lelmoi lelimo leliom leloim lelomi leilmo leilom leimlo leimol
leioml leiolm leolim leolmi leoilm leoiml leomil leomli lolmie lolmei lolime
loliem loleim lolemi lomlie lomlei lomile lomiel lomeil lomeli loimle loimel
loilme loilem loielm loieml loemil loemli loeiml loeilm loelim loelmi llomie
llomei lloime lloiem lloeim lloemi llmoie llmoei llmioe llmieo llmeio llmeoi
llimoe llimeo lliome llioem llieom lliemo llemio llemoi lleimo lleiom lleoim
lleomi lmloie lmloei lmlioe lmlieo lmleio lmleoi lmolie lmolei lmoile lmoiel
lmoeil lmoeli lmiole lmioel lmiloe lmileo lmielo lmieol lmeoil lmeoli lmeiol
lmeilo lmelio lmeloi lilmoe lilmeo lilome liloem lileom lilemo limloe limleo
limole limoel limeol limelo liomle liomel liolme liolem lioelm lioeml liemol
liemlo lieoml lieolm lielom lielmo lelmio lelmoi lelimo leliom leloim lelomi
lemlio lemloi lemilo lemiol lemoil lemoli leimlo leimol leilmo leilom leiolm
leioml leomil leomli leoiml leoilm leolim leolmi iollme iollem iolmle iolmel
ioleml iolelm iollme iollem iolmle iolmel ioleml iolelm iomlle iomlel iomlle
iomlel iomell iomell ioelml ioellm ioemll ioemll ioelml ioellm ilolme ilolem
ilomle ilomel iloeml iloelm illome illoem illmoe illmeo illemo illeom ilmloe
ilmleo ilmole ilmoel ilmeol ilmelo ilelmo ilelom ilemlo ilemol ileoml ileolm
illome illoem illmoe illmeo illemo illeom ilolme ilolem ilomle ilomel iloeml
iloelm ilmole ilmoel ilmloe ilmleo ilmelo ilmeol ileoml ileolm ilemol ilemlo
ilelmo ilelom imlloe imlleo imlole imloel imleol imlelo imlloe imlleo imlole
imloel imleol imlelo imolle imolel imolle imolel imoell imoell imelol imello
imeoll imeoll imelol imello iellmo iellom ielmlo ielmol ieloml ielolm iellmo
iellom ielmlo ielmol ieloml ielolm iemllo iemlol iemllo iemlol iemoll iemoll
ieolml ieollm ieomll ieomll ieolml ieollm eollim eollmi eolilm eoliml eolmil
eolmli eollim eollmi eolilm eoliml eolmil eolmli eoillm eoilml eoillm eoilml
eoimll eoimll eomlil eomlli eomill eomill eomlil eomlli elolim elolmi eloilm
eloiml elomil elomli elloim ellomi elliom ellimo ellmio ellmoi elilom elilmo
eliolm elioml elimol elimlo elmlio elmloi elmilo elmiol elmoil elmoli elloim
ellomi elliom ellimo ellmio ellmoi elolim elolmi eloilm eloiml elomil elomli
eliolm elioml elilom elilmo elimlo elimol elmoil elmoli elmiol elmilo elmlio
elmloi eillom eillmo eilolm eiloml eilmol eilmlo eillom eillmo eilolm eiloml
eilmol eilmlo eiollm eiolml eiollm eiolml eiomll eiomll eimlol eimllo eimoll
eimoll eimlol eimllo emllio emlloi emlilo emliol emloil emloli emllio emlloi
emlilo emliol emloil emloli emillo emilol emillo emilol emioll emioll emolil
emolli emoill emoill emolil emolli

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

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