A method of encoding possible offensive postings on Usenet so that those who don't want to be offended can avoid accidentally seeing the posting. Works by converting each letter to a number ( = , = , and so forth), adding 13 to the number, and then converting back into letters, rendering the file unreadable without deciphering.
also called Caesar Chipher (read more)
A simple encryption method (sometimes used on UseNet) for hiding the actual text of a message.
A simple way to encode bad jokes, movie reviews that give away the ending, pornography, etc. Essentially, each letter in a message is replace by the letter 13 spaces away from it in the alphabet. There are online decoders to read these; nn and rn have them built in.
Substitution cipher that rotates each letter 13 places.
Rotation 13. An encryption method in which each letter is replaced with the one 13 letters away from it in the alphabet. Because there are 26 letters in the alphabet, the same program can be used to encode and decode. It is often employed on Usenet
A simple encryption scheme where each letter is rotated 13 characters up or down the alphabet. Based on one of the world's oldest encryption schemes, ROT13 came into common use in the 1970s on early BBS's (Bulletin Board Systems), and later on Usenet. In geocaching, cache location hints are encoded using ROT13.
A simple encryption scheme for text messages, it which each letter of the alphabet is rotated with the one 13 places behind or ahead of it.
ROT13 ("rotate by 13 places", usually hyphenated ROT-13) is a simple Caesar cipher used for obscuring text by replacing each letter with the letter thirteen places down the alphabet. A becomes N, B becomes O, and so on up to M, which becomes Z, then the sequence reverses: N becomes A, O becomes B, and so on to Z, which becomes M. The algorithm is used in online forums as a means of hiding joke punchlines, puzzle solutions, movie and story spoilers, and offensive materials from the casual glance.
