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

l_{c} &=& (l_{p}+13)\mod{26}

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


fuss/cryptography/cyphers/rot-13.txt ยท Last modified: 2017/02/22 18:30 (external edit)

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