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) : 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*!

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 (This is equivalent to using a substitution with a shifted alphabet).

Example: 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 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.

Example: 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 online. Except explicit open source licence (indicated Creative Commons / free), any algorithm, applet, snippet, software (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any function (convert, solve, decrypt, encrypt, decipher, cipher, decode, code, translate) written in any informatic langauge (PHP, Java, C#, Python, Javascript, Matlab, etc.) which dCode owns rights will not be given for free. To download the online Shift Cipher script for offline use on PC, iPhone or Android, ask for price quote on contact page !

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

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

© 2018 dCode — The ultimate 'toolkit' to solve every games / riddles / geocaches. dCode

Feedback