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heniquens

ashir

emmey

tamenund

scorpio

conicimus


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: molton
cipher variations:
npmupo oqnvqp prowrq qspxsr rtqyts
surzut tvsavu uwtbwv vxucxw wyvdyx
xzwezy yaxfaz zbygba aczhcb bdaidc
cebjed dfckfe egdlgf fhemhg gifnih
hjgoji ikhpkj jliqlk kmjrml lnksnm

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.)
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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: molton
Cipher: nloglm

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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: molton
Cipher: ABABB ABBAB ABABA BAABA ABBAB ABBAA

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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: molton
cipher variations:
npmupolrigrojtestohvaevofxwqxodzsczozdkadoxfgmfo
vhcyhotjykjorluwlopnqinooqnvqpmsjhspkuftupiwbfwp
gyxrypeatdapaelbepyghngpwidzipukzlkpsmvxmpqorjop
prowrqntkitqlvguvqjxcgxqhzyszqfbuebqbfmcfqzhiohq
xjeajqvlamlqtnwynqrpskpqqspxsrouljurmwhvwrkydhyr
iaztargcvfcrcgndgraijpirykfbkrwmbnmruoxzorsqtlqr
rtqytspvmkvsnxiwxslzeizsjbaubshdwgdsdhoehsbjkqjs
zlgclsxnconsvpyapstrumrssurzutqwnlwtoyjxytmafjat
kcbvctiexheteipfitcklrktamhdmtyodpotwqzbqtusvnst
tvsavurxomxupzkyzunbgkbuldcwdujfyifufjqgjudlmslu
bnienuzpeqpuxracruvtwotuuwtbwvsypnyvqalzavochlcv
medxevkgzjgvgkrhkvemntmvcojfovaqfrqvysbdsvwuxpuv
vxucxwtzqozwrbmabwpdimdwnfeyfwlhakhwhlsilwfnounw
dpkgpwbrgsrwztcetwxvyqvwwyvdyxuarpaxscnbcxqejnex
ogfzgxmibliximtjmxgopvoxeqlhqxcshtsxaudfuxywzrwx
xzwezyvbsqbytdocdyrfkofyphgahynjcmjyjnuknyhpqwpy
frmirydtiutybvegvyzxasxyyaxfazwctrczuepdezsglpgz
qihbizokdnkzkovloziqrxqzgsnjszeujvuzcwfhwzaybtyz
zbygbaxdusdavfqefathmqharjicjapleolalpwmpajrsyra
htoktafvkwvadxgixabzcuzaaczhcbyevtebwgrfgbuinrib
skjdkbqmfpmbmqxnqbkstzsbiuplubgwlxwbeyhjybcadvab
bdaidczfwufcxhsghcvjosjctlkelcrngqncnryorcltuatc
jvqmvchxmyxcfzikzcdbewbccebjedagxvgdyithidwkptkd
umlfmdsohrodoszpsdmuvbudkwrnwdiynzydgajladecfxcd
dfckfebhywhezjuijexlqulevnmgnetpispeptaqtenvwcve
lxsoxejzoazehbkmbefdgydeegdlgfcizxifakvjkfymrvmf
wonhofuqjtqfqubrufowxdwfmytpyfkapbaficlncfgehzef
fhemhgdjayjgblwklgznswngxpoipgvrkurgrvcsvgpxyexg
nzuqzglbqcbgjdmodghfiafggifnihekbzkhcmxlmhaotxoh
yqpjqhwslvshswdtwhqyzfyhoavrahmcrdchkenpehigjbgh
hjgojiflcalidnymnibpuypizrqkrixtmwtitxeuxirzagzi
pbwsbindsedilfoqfijhkchiikhpkjgmdbmjeoznojcqvzqj
asrlsjyunxujuyfvyjsabhajqcxtcjoetfejmgprgjkildij
jliqlkhnecnkfpaopkdrwarkbtsmtkzvoyvkvzgwzktbcibk
rdyudkpfugfknhqshkljmejkkmjrmliofdolgqbpqlesxbsl
cutnulawpzwlwahxalucdjclsezvelqgvhgloirtilmknfkl
lnksnmjpgepmhrcqrmftyctmdvuovmbxqaxmxbiybmvdekdm
tfawfmrhwihmpjsujmnloglmmoltonkqhfqnisdrsnguzdun
ewvpwncyrbynycjzcnweflenugbxgnsixjinqktvknomphmn

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,

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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: molton
Cipher: zbygba

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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: molton
Cipher: 234313444333

Extended Methods:
Method #1

Plaintext: molton
method variations:
rtqytswyvdyxbdaidcgifoih

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
m o l t o n 
2 4 1 4 4 3 
3 3 3 4 3 3 
They are then read out in rows:
241443333433
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: molton
Cipher: rqonsn

Read more ...
Method #3

Plaintext: molton
method variations:
scstnh cstnhs stnhsc
tnhscs nhscst hscstn

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: molton

all 720 cipher variations:
molton moltno molotn molont molnot molnto motlon motlno motoln motonl motnol
motnlo mootln mootnl mooltn moolnt moonlt moontl montol montlo monotl monolt
monlot monlto mloton mlotno mlootn mloont mlonot mlonto mltoon mltono mltoon
mltono mltnoo mltnoo mloton mlotno mlootn mloont mlonot mlonto mlntoo mlntoo
mlnoto mlnoot mlnoot mlnoto mtloon mtlono mtloon mtlono mtlnoo mtlnoo mtolon
mtolno mtooln mtoonl mtonol mtonlo mtooln mtoonl mtolon mtolno mtonlo mtonol
mtnool mtnolo mtnool mtnolo mtnloo mtnloo molton moltno molotn molont molnot
molnto motlon motlno motoln motonl motnol motnlo mootln mootnl mooltn moolnt
moonlt moontl montol montlo monotl monolt monlot monlto mnltoo mnltoo mnloto
mnloot mnloot mnloto mntloo mntloo mntolo mntool mntool mntolo mnotlo mnotol
mnolto mnolot mnoolt mnootl mnotol mnotlo mnootl mnoolt mnolot mnolto omlton
omltno omlotn omlont omlnot omlnto omtlon omtlno omtoln omtonl omtnol omtnlo
omotln omotnl omoltn omolnt omonlt omontl omntol omntlo omnotl omnolt omnlot
omnlto olmton olmtno olmotn olmont olmnot olmnto oltmon oltmno oltomn oltonm
oltnom oltnmo olotmn olotnm olomtn olomnt olonmt olontm olntom olntmo olnotm
olnomt olnmot olnmto otlmon otlmno otlomn otlonm otlnom otlnmo otmlon otmlno
otmoln otmonl otmnol otmnlo otomln otomnl otolmn otolnm otonlm otonml otnmol
otnmlo otnoml otnolm otnlom otnlmo ooltmn ooltnm oolmtn oolmnt oolnmt oolntm
ootlmn ootlnm ootmln ootmnl ootnml ootnlm oomtln oomtnl oomltn oomlnt oomnlt
oomntl oontml oontlm oonmtl oonmlt oonlmt oonltm onltom onltmo onlotm onlomt
onlmot onlmto ontlom ontlmo ontolm ontoml ontmol ontmlo onotlm onotml onoltm
onolmt onomlt onomtl onmtol onmtlo onmotl onmolt onmlot onmlto lomton lomtno
lomotn lomont lomnot lomnto lotmon lotmno lotomn lotonm lotnom lotnmo lootmn
lootnm loomtn loomnt loonmt loontm lontom lontmo lonotm lonomt lonmot lonmto
lmoton lmotno lmootn lmoont lmonot lmonto lmtoon lmtono lmtoon lmtono lmtnoo
lmtnoo lmoton lmotno lmootn lmoont lmonot lmonto lmntoo lmntoo lmnoto lmnoot
lmnoot lmnoto ltmoon ltmono ltmoon ltmono ltmnoo ltmnoo ltomon ltomno ltoomn
ltoonm ltonom ltonmo ltoomn ltoonm ltomon ltomno ltonmo ltonom ltnoom ltnomo
ltnoom ltnomo ltnmoo ltnmoo lomton lomtno lomotn lomont lomnot lomnto lotmon
lotmno lotomn lotonm lotnom lotnmo lootmn lootnm loomtn loomnt loonmt loontm
lontom lontmo lonotm lonomt lonmot lonmto lnmtoo lnmtoo lnmoto lnmoot lnmoot
lnmoto lntmoo lntmoo lntomo lntoom lntoom lntomo lnotmo lnotom lnomto lnomot
lnoomt lnootm lnotom lnotmo lnootm lnoomt lnomot lnomto tolmon tolmno tolomn
tolonm tolnom tolnmo tomlon tomlno tomoln tomonl tomnol tomnlo toomln toomnl
toolmn toolnm toonlm toonml tonmol tonmlo tonoml tonolm tonlom tonlmo tlomon
tlomno tloomn tloonm tlonom tlonmo tlmoon tlmono tlmoon tlmono tlmnoo tlmnoo
tlomon tlomno tloomn tloonm tlonom tlonmo tlnmoo tlnmoo tlnomo tlnoom tlnoom
tlnomo tmloon tmlono tmloon tmlono tmlnoo tmlnoo tmolon tmolno tmooln tmoonl
tmonol tmonlo tmooln tmoonl tmolon tmolno tmonlo tmonol tmnool tmnolo tmnool
tmnolo tmnloo tmnloo tolmon tolmno tolomn tolonm tolnom tolnmo tomlon tomlno
tomoln tomonl tomnol tomnlo toomln toomnl toolmn toolnm toonlm toonml tonmol
tonmlo tonoml tonolm tonlom tonlmo tnlmoo tnlmoo tnlomo tnloom tnloom tnlomo
tnmloo tnmloo tnmolo tnmool tnmool tnmolo tnomlo tnomol tnolmo tnolom tnoolm
tnooml tnomol tnomlo tnooml tnoolm tnolom tnolmo ooltmn ooltnm oolmtn oolmnt
oolnmt oolntm ootlmn ootlnm ootmln ootmnl ootnml ootnlm oomtln oomtnl oomltn
oomlnt oomnlt oomntl oontml oontlm oonmtl oonmlt oonlmt oonltm olotmn olotnm
olomtn olomnt olonmt olontm oltomn oltonm oltmon oltmno oltnmo oltnom olmton
olmtno olmotn olmont olmnot olmnto olntmo olntom olnmto olnmot olnomt olnotm
otlomn otlonm otlmon otlmno otlnmo otlnom otolmn otolnm otomln otomnl otonml
otonlm otmoln otmonl otmlon otmlno otmnlo otmnol otnoml otnolm otnmol otnmlo
otnlmo otnlom omlton omltno omlotn omlont omlnot omlnto omtlon omtlno omtoln
omtonl omtnol omtnlo omotln omotnl omoltn omolnt omonlt omontl omntol omntlo
omnotl omnolt omnlot omnlto onltmo onltom onlmto onlmot onlomt onlotm ontlmo
ontlom ontmlo ontmol ontoml ontolm onmtlo onmtol onmlto onmlot onmolt onmotl
onotml onotlm onomtl onomlt onolmt onoltm noltom noltmo nolotm nolomt nolmot
nolmto notlom notlmo notolm notoml notmol notmlo nootlm nootml nooltm noolmt
noomlt noomtl nomtol nomtlo nomotl nomolt nomlot nomlto nlotom nlotmo nlootm
nloomt nlomot nlomto nltoom nltomo nltoom nltomo nltmoo nltmoo nlotom nlotmo
nlootm nloomt nlomot nlomto nlmtoo nlmtoo nlmoto nlmoot nlmoot nlmoto ntloom
ntlomo ntloom ntlomo ntlmoo ntlmoo ntolom ntolmo ntoolm ntooml ntomol ntomlo
ntoolm ntooml ntolom ntolmo ntomlo ntomol ntmool ntmolo ntmool ntmolo ntmloo
ntmloo noltom noltmo nolotm nolomt nolmot nolmto notlom notlmo notolm notoml
notmol notmlo nootlm nootml nooltm noolmt noomlt noomtl nomtol nomtlo nomotl
nomolt nomlot nomlto nmltoo nmltoo nmloto nmloot nmloot nmloto nmtloo nmtloo
nmtolo nmtool nmtool nmtolo nmotlo nmotol nmolto nmolot nmoolt nmootl nmotol
nmotlo nmootl nmoolt nmolot nmolto

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