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avowedly

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hiper


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: hotted
cipher variations:
ipuufe jqvvgf krwwhg lsxxih mtyyji
nuzzkj ovaalk pwbbml qxccnm ryddon
szeepo taffqp ubggrq vchhsr wdiits
xejjut yfkkvu zgllwv ahmmxw binnyx
cjoozy dkppaz elqqba fmrrcb gnssdc

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: hotted
Cipher: slggvw

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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: hotted
Cipher: AABBB ABBAB BAABA BAABA AABAA AAABB

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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: hotted
cipher variations:
ipuufewrggnkktssvqyveedwmxqqlcazccticdaajuqfmmra
ehyyzgsjkkhmglwwpsuniixyjqvvgfxshholluttwrzwffex
nyrrmdbaddujdebbkvrgnnsbfizzahtkllinhmxxqtvojjyz
krwwhgytiipmmvuuxsaxggfyozssnecbeevkefcclwshootc
gjaabiulmmjoinyyruwpkkzalsxxihzujjqnnwvvytbyhhgz
pattofdcffwlfgddmxtippudhkbbcjvmnnkpjozzsvxqllab
mtyyjiavkkrooxwwzucziihaqbuupgedggxmgheenyujqqve
ilccdkwnoolqkpaatwyrmmbcnuzzkjbwllsppyxxavdajjib
rcvvqhfehhynhiffozvkrrwfjmddelxoppmrlqbbuxzsnncd
ovaalkcxmmtqqzyybwebkkjcsdwwrigfiizoijggpawlssxg
kneefmypqqnsmrccvyatoodepwbbmldynnurrazzcxfcllkd
texxsjhgjjapjkhhqbxmttyhloffgnzqrrotnsddwzbuppef
qxccnmezoovssbaadygdmmleufyytkihkkbqkliircynuuzi
mpgghoarsspuoteexacvqqfgryddonfappwttcbbezhennmf
vgzzuljillcrlmjjsdzovvajnqhhipbsttqvpuffybdwrrgh
szeepogbqqxuudccfaifoongwhaavmkjmmdsmnkkteapwwbk
oriijqctuurwqvggzcexsshitaffqphcrryvveddgbjgppoh
xibbwnlknnetnollufbqxxclpsjjkrduvvsxrwhhadfyttij
ubggrqidsszwwfeehckhqqpiyjccxomloofuopmmvgcryydm
qtkklsevwwtysxiibegzuujkvchhsrjettaxxgffidlirrqj
zkddypnmppgvpqnnwhdszzenrullmtfwxxuztyjjcfhavvkl
wdiitskfuubyyhggjemjssrkaleezqonqqhwqrooxietaafo
svmmnugxyyvauzkkdgibwwlmxejjutlgvvczzihhkfnkttsl
bmffarporrixrsppyjfubbgptwnnovhyzzwbvallehjcxxmn
yfkkvumhwwdaajiilgoluutmcnggbsqpssjystqqzkgvcchq
uxoopwizaaxcwbmmfikdyynozgllwvnixxebbkjjmhpmvvun
dohhctrqttkzturralhwddirvyppqxjabbydxcnngjlezzop
ahmmxwojyyfcclkkniqnwwvoepiidusruulauvssbmixeejs
wzqqrykbcczeydoohkmfaapqbinnyxpkzzgddmllojroxxwp
fqjjevtsvvmbvwttcnjyffktxarrszlcddafzeppilngbbqr
cjoozyqlaaheenmmpkspyyxqgrkkfwutwwncwxuudokzgglu
ybsstamdeebgafqqjmohccrsdkppazrmbbiffonnqltqzzyr
hsllgxvuxxodxyvveplahhmvzcttubneffchbgrrknpiddst
elqqbasnccjggpoormuraazsitmmhywvyypeyzwwfqmbiinw
aduuvcofggdichssloqjeetufmrrcbtoddkhhqppsnvsbbat
junnizxwzzqfzaxxgrncjjoxbevvwdpghhejdittmprkffuv
gnssdcupeeliirqqtowtccbukvoojayxaargabyyhsodkkpy
cfwwxeqhiifkejuunqslggvwhottedvqffmjjsrrupxuddcv
lwppkbzybbshbczzitpellqzdgxxyfrijjglfkvvortmhhwx

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: hotted
Cipher: ubggrq

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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: hotted
Cipher: 324344445141

Extended Methods:
Method #1

Plaintext: hotted
method variations:
ntyykisyddpoxdiiutcioozy

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:
h o t t e d 
3 4 4 4 5 4 
2 3 4 4 1 1 
They are then read out in rows:
344454234411
Then divided up into pairs again, and the pairs turned back into letters using the square:
Plain: hotted
Cipher: stumta

Read more ...
Method #3

Plaintext: hotted
method variations:
rstyql styqlr tyqlrs
yqlrst qlrsty lrstyq

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: hotted

all 720 cipher variations:
hotted hottde hotetd hotedt hotdet hotdte hotted hottde hotetd hotedt hotdet
hotdte hoettd hoetdt hoettd hoetdt hoedtt hoedtt hodtet hodtte hodett hodett
hodtet hodtte htoted htotde htoetd htoedt htodet htodte httoed httode htteod
httedo httdeo httdoe htetod htetdo hteotd hteodt htedot htedto htdteo htdtoe
htdeto htdeot htdoet htdote httoed httode htteod httedo httdeo httdoe htoted
htotde htoetd htoedt htodet htodte hteotd hteodt htetod htetdo htedto htedot
htdoet htdote htdeot htdeto htdteo htdtoe hettod hettdo hetotd hetodt hetdot
hetdto hettod hettdo hetotd hetodt hetdot hetdto heottd heotdt heottd heotdt
heodtt heodtt hedtot hedtto hedott hedott hedtot hedtto hdtteo hdttoe hdteto
hdteot hdtoet hdtote hdtteo hdttoe hdteto hdteot hdtoet hdtote hdetto hdetot
hdetto hdetot hdeott hdeott hdotet hdotte hdoett hdoett hdotet hdotte ohtted
ohttde ohtetd ohtedt ohtdet ohtdte ohtted ohttde ohtetd ohtedt ohtdet ohtdte
ohettd ohetdt ohettd ohetdt ohedtt ohedtt ohdtet ohdtte ohdett ohdett ohdtet
ohdtte othted othtde othetd othedt othdet othdte otthed otthde ottehd ottedh
ottdeh ottdhe otethd otetdh otehtd otehdt otedht otedth otdteh otdthe otdeth
otdeht otdhet otdhte otthed otthde ottehd ottedh ottdeh ottdhe othted othtde
othetd othedt othdet othdte otehtd otehdt otethd otetdh otedth otedht otdhet
otdhte otdeht otdeth otdteh otdthe oetthd oettdh oethtd oethdt oetdht oetdth
oetthd oettdh oethtd oethdt oetdht oetdth oehttd oehtdt oehttd oehtdt oehdtt
oehdtt oedtht oedtth oedhtt oedhtt oedtht oedtth odtteh odtthe odteth odteht
odthet odthte odtteh odtthe odteth odteht odthet odthte odetth odetht odetth
odetht odehtt odehtt odhtet odhtte odhett odhett odhtet odhtte tohted tohtde
tohetd tohedt tohdet tohdte tothed tothde totehd totedh totdeh totdhe toethd
toetdh toehtd toehdt toedht toedth todteh todthe todeth todeht todhet todhte
thoted thotde thoetd thoedt thodet thodte thtoed thtode thteod thtedo thtdeo
thtdoe thetod thetdo theotd theodt thedot thedto thdteo thdtoe thdeto thdeot
thdoet thdote tthoed tthode ttheod tthedo tthdeo tthdoe ttohed ttohde ttoehd
ttoedh ttodeh ttodhe tteohd tteodh ttehod ttehdo ttedho ttedoh ttdoeh ttdohe
ttdeoh ttdeho ttdheo ttdhoe tehtod tehtdo tehotd tehodt tehdot tehdto tethod
tethdo tetohd tetodh tetdoh tetdho teothd teotdh teohtd teohdt teodht teodth
tedtoh tedtho tedoth tedoht tedhot tedhto tdhteo tdhtoe tdheto tdheot tdhoet
tdhote tdtheo tdthoe tdteho tdteoh tdtoeh tdtohe tdetho tdetoh tdehto tdehot
tdeoht tdeoth tdoteh tdothe tdoeth tdoeht tdohet tdohte tothed tothde totehd
totedh totdeh totdhe tohted tohtde tohetd tohedt tohdet tohdte toehtd toehdt
toethd toetdh toedth toedht todhet todhte todeht todeth todteh todthe ttohed
ttohde ttoehd ttoedh ttodeh ttodhe tthoed tthode ttheod tthedo tthdeo tthdoe
ttehod ttehdo tteohd tteodh ttedoh ttedho ttdheo ttdhoe ttdeho ttdeoh ttdoeh
ttdohe thtoed thtode thteod thtedo thtdeo thtdoe thoted thotde thoetd thoedt
thodet thodte theotd theodt thetod thetdo thedto thedot thdoet thdote thdeot
thdeto thdteo thdtoe tethod tethdo tetohd tetodh tetdoh tetdho tehtod tehtdo
tehotd tehodt tehdot tehdto teohtd teohdt teothd teotdh teodth teodht tedhot
tedhto tedoht tedoth tedtoh tedtho tdtheo tdthoe tdteho tdteoh tdtoeh tdtohe
tdhteo tdhtoe tdheto tdheot tdhoet tdhote tdehto tdehot tdetho tdetoh tdeoth
tdeoht tdohet tdohte tdoeht tdoeth tdoteh tdothe eotthd eottdh eothtd eothdt
eotdht eotdth eotthd eottdh eothtd eothdt eotdht eotdth eohttd eohtdt eohttd
eohtdt eohdtt eohdtt eodtht eodtth eodhtt eodhtt eodtht eodtth etothd etotdh
etohtd etohdt etodht etodth ettohd ettodh etthod etthdo ettdho ettdoh ethtod
ethtdo ethotd ethodt ethdot ethdto etdtho etdtoh etdhto etdhot etdoht etdoth
ettohd ettodh etthod etthdo ettdho ettdoh etothd etotdh etohtd etohdt etodht
etodth ethotd ethodt ethtod ethtdo ethdto ethdot etdoht etdoth etdhot etdhto
etdtho etdtoh ehttod ehttdo ehtotd ehtodt ehtdot ehtdto ehttod ehttdo ehtotd
ehtodt ehtdot ehtdto ehottd ehotdt ehottd ehotdt ehodtt ehodtt ehdtot ehdtto
ehdott ehdott ehdtot ehdtto edttho edttoh edthto edthot edtoht edtoth edttho
edttoh edthto edthot edtoht edtoth edhtto edhtot edhtto edhtot edhott edhott
edotht edotth edohtt edohtt edotht edotth dotteh dotthe doteth doteht dothet
dothte dotteh dotthe doteth doteht dothet dothte doetth doetht doetth doetht
doehtt doehtt dohtet dohtte dohett dohett dohtet dohtte dtoteh dtothe dtoeth
dtoeht dtohet dtohte dttoeh dttohe dtteoh dtteho dttheo dtthoe dtetoh dtetho
dteoth dteoht dtehot dtehto dthteo dthtoe dtheto dtheot dthoet dthote dttoeh
dttohe dtteoh dtteho dttheo dtthoe dtoteh dtothe dtoeth dtoeht dtohet dtohte
dteoth dteoht dtetoh dtetho dtehto dtehot dthoet dthote dtheot dtheto dthteo
dthtoe dettoh dettho detoth detoht dethot dethto dettoh dettho detoth detoht
dethot dethto deotth deotht deotth deotht deohtt deohtt dehtot dehtto dehott
dehott dehtot dehtto dhtteo dhttoe dhteto dhteot dhtoet dhtote dhtteo dhttoe
dhteto dhteot dhtoet dhtote dhetto dhetot dhetto dhetot dheott dheott dhotet
dhotte dhoett dhoett dhotet dhotte

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