salwa - written in most popular ciphers: caesar cipher, atbash, polybius square , affine cipher, baconian cipher, bifid cipher, rot13, permutation cipher

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: salwa

cipher variations:
tbmxb	ucnyc	vdozd	wepae	xfqbf
ygrcg	zhsdh	aitei	bjufj	ckvgk
dlwhl	emxim	fnyjn	gozko	hpalp
iqbmq	jrcnr	ksdos	ltept	mufqu
nvgrv	owhsw	pxitx	qyjuy	rzkvz

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:	salwa
Cipher:	hzodz

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:	salwa
Cipher:	BAAAB AAAAA ABABA BABAA AAAAA

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: salwa

cipher variations:

tbmxb

dbipb

nbehb

xbazb

hbwrb

rbsjb

lbktb

vbglb

fbcdb

pbyvb

zbunb

jbqfb

ucnyc

ecjqc

ocfic

ycbac

icxsc

sctkc

mcluc

wchmc

gcdec

qczwc

acvoc

kcrgc

vdozd

fdkrd

pdgjd

zdcbd

jdytd

tduld

ndmvd

xdind

hdefd

rdaxd

bdwpd

ldshd

wepae

gelse

qehke

aedce

kezue

uevme

oenwe

yejoe

iefge

sebye

cexqe

metie

xfqbf

hfmtf

rfilf

bfedf

lfavf

vfwnf

pfoxf

zfkpf

jfghf

tfczf

dfyrf

nfujf

ygrcg

ignug

sgjmg

cgfeg

mgbwg

wgxog

qgpyg

aglqg

kghig

ugdag

egzsg

ogvkg

zhsdh

jhovh

thknh

dhgfh

nhcxh

xhyph

rhqzh

bhmrh

lhijh

vhebh

fhath

phwlh

aitei

kipwi

uiloi

eihgi

oidyi

yizqi

sirai

cinsi

mijki

wifci

gibui

qixmi

bjufj

ljqxj

vjmpj

fjihj

pjezj

zjarj

tjsbj

djotj

njklj

xjgdj

hjcvj

rjynj

ckvgk

mkryk

wknqk

gkjik

qkfak

akbsk

uktck

ekpuk

oklmk

ykhek

ikdwk

skzok

dlwhl

nlszl

xlorl

hlkjl

rlgbl

blctl

vludl

flqvl

plmnl

zlifl

jlexl

tlapl

emxim

omtam

ympsm

imlkm

smhcm

cmdum

wmvem

gmrwm

qmnom

amjgm

kmfym

umbqm

fnyjn

pnubn

znqtn

jnmln

tnidn

dnevn

xnwfn

hnsxn

rnopn

bnkhn

lngzn

vncrn

gozko

qovco

aoruo

konmo

uojeo

eofwo

yoxgo

iotyo

sopqo

colio

mohao

wodso

hpalp

rpwdp

bpsvp

lponp

vpkfp

fpgxp

zpyhp

jpuzp

tpqrp

dpmjp

npibp

xpetp

iqbmq

sqxeq

cqtwq

mqpoq

wqlgq

gqhyq

aqziq

kqvaq

uqrsq

eqnkq

oqjcq

yqfuq

jrcnr

tryfr

druxr

nrqpr

xrmhr

hrizr

brajr

lrwbr

vrstr

frolr

prkdr

zrgvr

ksdos

uszgs

esvys

osrqs

ysnis

isjas

csbks

msxcs

wstus

gspms

qsles

ashws

ltept

vtaht

ftwzt

ptsrt

ztojt

jtkbt

dtclt

ntydt

xtuvt

htqnt

rtmft

btixt

mufqu

wubiu

guxau

qutsu

aupku

kulcu

eudmu

ouzeu

yuvwu

iurou

sungu

cujyu

nvgrv

xvcjv

hvybv

rvutv

bvqlv

lvmdv

fvenv

pvafv

zvwxv

jvspv

tvohv

dvkzv

owhsw

ywdkw

iwzcw

swvuw

cwrmw

mwnew

gwfow

qwbgw

awxyw

kwtqw

uwpiw

ewlaw

pxitx

zxelx

jxadx

txwvx

dxsnx

nxofx

hxgpx

rxchx

bxyzx

lxurx

vxqjx

fxmbx

qyjuy

ayfmy

kybey

uyxwy

eytoy

oypgy

iyhqy

sydiy

cyzay

myvsy

wyrky

gyncy

rzkvz

bzgnz

lzcfz

vzyxz

fzupz

pzqhz

jzirz

tzejz

dzabz

nzwtz

xzslz

hzodz

salwa

cahoa

madga

wazya

gavqa

qaria

kajsa

uafka

eabca

oaxua

yatma

iapea

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,

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:	salwa
Cipher:	fnyjn

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:	salwa
Cipher:	3411132511

Extended Methods:
Method #1

Plaintext: salwa

method variations:
xfqbf	clvgl	hqamq	nvfrv

Method #2
Bifid cipher
The message is converted to its coordinates in the usual manner, but they are written vertically beneath:

s a l w a 
3 1 1 2 1 
4 1 3 5 1

They are then read out in rows:
3112141351
Then divided up into pairs again, and the pairs turned back into letters using the square:

Plain:	salwa
Cipher:	cfqle

Read more ...
Method #3

Plaintext: salwa

method variations:
dahel	aheld	helda
eldah	ldahe

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: salwa

all 120 cipher variations:

salwa

salaw

sawla

sawal

saawl

saalw

slawa

slaaw

slwaa

slawa

slaaw

swlaa

swala

swaal

swala

salwa

salaw

sawla

sawal

saawl

saalw

aslwa

aslaw

aswla

aswal

asawl

asalw

alswa

alsaw

alwsa

alwas

alaws

alasw

awlsa

awlas

awsla

awsal

awasl

awals

aalws

aalsw

aawls

aawsl

aaswl

aaslw

laswa

lasaw

lawsa

lawas

laaws

laasw

lsawa

lsaaw

lswaa

lsawa

lsaaw

lwsaa

lwasa

lwaas

lwasa

laswa

lasaw

lawsa

lawas

laaws

laasw

walsa

walas

wasla

wasal

waasl

waals

wlasa

wlaas

wlsaa

wlasa

wlaas

wslaa

wsala

wsaal

wsala

walsa

walas

wasla

wasal

waasl

waals

aalws

aalsw

aawls

aawsl

aaswl

aaslw

alaws

alasw

alwas

alwsa

alswa

alsaw

awlas

awlsa

awals

awasl

awsal

awsla

aslwa

aslaw

aswla

aswal

asawl

asalw