Tool for automatic Shift Cipher that consists in replacing a letter by another one in the alphabet using a shifting system, a simple or complex sequence of numbers.

Shift Cipher - dCode

Tag(s) : Cryptography,Substitution Cipher

dCode is free and its tools are a valuable help in games, puzzles and problems to solve every day!

You have a problem, an idea for a project, a specific need and dCode can not (yet) help you? You need custom development? *Contact-me*!

This page is using the new English version of dCode, *please make comments* !

Sponsored ads

Tool for automatic Shift Cipher that consists in replacing a letter by another one in the alphabet using a shifting system, a simple or complex sequence of numbers.

The encryption uses an alphabet and the position of its letters.

A letter in position N in the alphabet, can be shifted by X into the letter located at position N+X.

Take the letter E in position 5 in the alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ, it will be encrypted by a shift of 3 in position 8 or H.

If the shifted position exceeds the number of letters in the alphabet, then we take it at the beginning: Z shifted by 1 gives A.

It is thus possible to define different shifts, some shifts correspond to known encryption algorithms (eg the Caesar code), please visit the dedicated pages for more details.

A single shift (all letters are shifted to the same value) is called Caesar Code.

A multiple shift, according to a key that is repeated (the letters are shifted from each of the key values), it is called Vigenere Cipher.

A mathematical shift, the easiest way is to shift the nth letter of the value n is the Trithemus Cipher or if the shift is more complex Affine Cipher or even Hill Cipher.

Decryption requires knowing the shift used and the alphabet.

Take a letter in position N in the alphabet that has been encrypted by a shift of X, it must be shifted by -X to return to its original position N-X.

The letter H in position 8 in the alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ, will be decrypted from a shift of 3 in position 8-3=5 or E.

dCode retains ownership of the source code of the script Shift Cipher. Except explicit open source licence (free / freeware), any algorithm, applet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any snippet or function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in PHP (or Java, C#, Python, Javascript, etc.) which dCode owns rights can be transferred after sales quote. So if you need to download the Shift Cipher script for offline use, for you, your company or association, see you on contact page !

shift,shifting,letter,caesar,sequence,number,word,progressive

Source : http://www.dcode.fr/shift-cipher

© 2017 dCode — The ultimate 'toolkit' website to solve every problem. dCode