Tool to decrypt/encrypt with rot13. ROT-13 cipher is a particular case of the Caesar cipher, where the shift is equal to 13, this allow the cipher to be reciprocal.

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Tool to decrypt/encrypt with rot13. ROT-13 cipher is a particular case of the Caesar cipher, where the shift is equal to 13, this allow the cipher to be reciprocal.

Answers to Questions

How to encrypt using Rot-13?

Encryption with Rot-13 remplace a letter by another one placed 13 position after in the alphabet

ABCDEFGHIJKLM NOPQRSTUVWXYZ

DCODE is crypted QPBQR with ROT-13

How to decrypt Rot-13 cipher?

Rot-13 decryption is identical to encryption, due to the reciprocal substituting alphabet used:

ABCDEFGHIJKLM NOPQRSTUVWXYZ

QPBQR becomes DCODE.

How to recognize ROT-13 ciphered text?

Frequency analysis show a shift of 13 letters. The ciphered message have an indice of coincidence similar to the language of the plain text.

What are the variants of the Rot-13 cipher?

Rot-13 is in fact a Caesar cipher with a shift of 13. As this code only works with letters, it was proposed to use it with the Rot5 for numbers or the Rot47 for ASCII values.

What is the particularity of ROT13 Cipher?

A 13 shift allow the code to be reciproqual, this means that 2 consecutive encryption lead to find the original text.

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Source code

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