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ROT-13

ROT-13 is a substitution cypher where each letter is replaced with the letter after 13 positions in the alphabet. Similar to the Caesar Shift the encryption can be written as

\begin{eqnarray*} l_{c} &=& (l_{p}+13)\mod{26} \end{eqnarray*}

and the decryption, for 26 letter alphabets is homomorphic to the encryption.

Implementations

fuss/cryptography/cyphers/rot-13.txt ยท Last modified: 2022/04/19 08:28 by 127.0.0.1
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