Porta Cipher is a polyalphabetic substitution cipher invented by Giovanni Battista della Porta. Where the Vigenere cipher is a polyalphabetic cipher with 26 alphabets, the Porta is basically the same except it only uses 13 alphabets. The 13 cipher alphabets it uses are reciprocal, so enciphering is the same as deciphering.

ROT13 Cipher is a simple letter substitution cipher with a specific key where the letters of the alphabet are offset 13 places.

Simple Substitution Cipher is a cipher that has been in use for many hundreds of years. It basically consists of substituting every plaintext character for a different ciphertext character.

Running Key Cipher is a type of polyalphabetic substitution cipher in which a text, typically from a book, is used to provide a very long keystream.