In 1513 Cornelius Agrippa introduce early form Rosicrucian Cipher in his books Occult of Philosophy. Geometric and simple substitution cipher are well known ciphers Pigpen , Freemason, Napoleon and tic tac toe ciphers in which alphabets or symbols arrange in grids. This is an anagram, "How to reconstruct a data " lets encode the message. Pigpen cipher , Rosicrucian and Tic tac toe Cipher Thank you have a good day.
ROT13 is a member of substitution cipher class. I had discuss two members of this class, if you remember. Atbash cipher Affine Cipher (shift cipher) If you remember the history which I had share you. Atbash cipher encode message by shifting key = -1 but in inverse direction. A = Z, B = Y and so on. However in shift cipher key = 3. Message : HELLO : JGNNQ Both ciphers are special affine cipher case. As you know shift cipher had introduced by julius caesar in rome. Julius had encoded message by shifting letter 3 time forward, so that it will not understand. However after 2 or 3 decade later it's is easy to decipher. The above example use same technique. In Rot13 alphabets shift by 13 letters. A = N, B = O and so on. Let time to solve a riddle: Yrg cynl n tnzr. Zl anzr vf Ze K. Zngurzngvpf fbyir ernyvgl ceboyrzf, ohg fpvrapr yngre cebir gur inyvqvg