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ROT Cipher

Tool to decrypt/encrypt by ROT. The code ROT for Rotation (which most common variant is Caesar Cipher) is the easiest shift-based encryption cipher.

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ROT Cipher -

Tag(s) : Cryptography, Substitution Cipher

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# ROT Cipher

## ROT-n Encoder

Tool to decrypt/encrypt by ROT. The code ROT for Rotation (which most common variant is Caesar Cipher) is the easiest shift-based encryption cipher.

### How to encrypt using Rot-N cipher?

Rot-N cipher is a simple character substitution based on a shift (or rotation) of an alphabet. E.g. one letter is replaced by another (always the same) that is located further in the alphabet. This is the basis of the famous Caesar code and its many variants modifying the shift. The most popular variant is the ROT13 which has the advantage of being reversible with a 26 letter alphabet (the encryption or decryption operations are identical because 13 is half of 26).

Example: Consider the message ROTATION coded on the alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ with an offset of 'N = 13'

 Plain Alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ Cipher AlphabetShift/Rotation of 1 BCDEFGHIJKLMNOPQRSTUVWXYZA Cipher AlphabetShift/Rotation of 2 CDEFGHIJKLMNOPQRSTUVWXYZAB ... ... Cipher AlphabetShift/Rotation of 13 NOPQRSTUVWXYZABCDEFGHIJKLM ... ...

Example: The encrypted message is EBGNGVBA

### How to decrypt Rot-N cipher?

Deciphering is very similar (or sometimes identical) to encryption. Just shift the alphabet in the other direction.