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ROT1 Cipher

Tool to decode/encode by ROT1. The ROT1 code for Rotation 1 is 1-letter shift cipher in the alphabet, similar to the Caesar code.

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ROT1 Cipher -

Tag(s) : Substitution Cipher

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ROT1 Cipher

ROT-1 Encoder

How to encrypt using Rot cipher?

The Rot-1 code is a substitution cipher based on a shift (also called rotation) of the alphabet. Here, a letter is replaced by the one immediately after in the alphabet (for the last letter Z, the alphabet is considered as a loop and the next letter Z is therefore A, the first letter)

This shift is the basis of the Caesar code and its variants, sometimes the offset of 1 is called August's code.

 Initial alphabet ABCDEFGHIJKLMNOPQRSTUVWXYZ Alphabet shifted by ROT1 BCDEFGHIJKLMNOPQRSTUVWXYZA

Example: The message ROTATION is coded SPUBUJPO

How to decrypt Rot1 cipher?

Rot1 decryption is similar to encryption but uses the opposite shift by replacing each letter with the one immediately before in the alphabet (and the letter before A is the letter Z as if the alphabet was a loop).

 Alphabet shifted by ROT1 ABCDEFGHIJKLMNOPQRSTUVWXYZ Plain alphabet ZABCDEFGHIJKLMNOPQRSTUVWXY

Example: The message BMQIBCFU is decoded ALPHABET

Source code

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NB: for encrypted messages, test our automatic cipher identifier!