ROT13 (Rotate13, "rotate by 13 places", sometimes hyphenated ROT-13) is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the Latin alphabet. ROT13 is a special case of the Caesar cipher which was developed in ancient Rome.
Because there are 26 letters (2×13) in the basic Latin alphabet, ROT13 is its own inverse; that is, to undo ROT13, the same algorithm is applied, so the same action can be used for encoding and decoding. The algorithm provides virtually no cryptographic security, and is often cited as a canonical example of weak encryption.[1]
ROT13 was used in online forums as a means of hiding spoilers, punchlines, puzzle solutions, and offensive materials from the casual glance. ROT13 has inspired a variety of letter and word games online, and is frequently mentioned in newsgroup conversations.
^Christopher Swenson (17 March 2008). Modern Cryptanalysis: Techniques for Advanced Code Breaking. John Wiley & Sons. p. 5. ISBN 978-0-470-13593-8. Archived from the original on 24 June 2016. Retrieved 5 October 2015.
ROT13 (Rotate13, "rotate by 13 places", sometimes hyphenated ROT-13) is a simple letter substitution cipher that replaces a letter with the 13th letter...
schemes, such as the Vigenère cipher, and still has modern application in the ROT13 system. As with all single-alphabet substitution ciphers, the Caesar cipher...
{E} (x)=(-x{\bmod {m}})+1.} Temurah (Kabbalah) Gematria Hebrew language ROT13 Rashi and Radak on each of the first three verses. Also other commentators...
as classical ciphers. They include simple substitution ciphers (such as ROT13) and transposition ciphers (such as a Rail Fence Cipher). For example, "GOOD...
2015. Include Security (19 August 2015). "Include Security Blog - As the ROT13 turns....: A light-weight forensic analysis of the AshleyMadison Hack"....
flammable liquefied gas, a risk phrase Rebellion R13, a prototype racing car ROT13, a simple cipher USS R-13 (SS-90), a submarine of the United States Navy...
2015. Include Security (August 19, 2015). "Include Security Blog – As the ROT13 turns….: A light-weight forensic analysis of the AshleyMadison Hack". includesecurity...
(play) Roman numerals (encode/decode) Roots of unity roots of a function Rot13—a simple letter substitution cipher Runge–Kutta method SEDOLs Semiprimes...
Global Information