Revision as of 02:17, 4 April 2007 edit Davidgothberg (talk \| contribs) Extended confirmed users 16,980 edits Added link to new keystream article. ← Previous edit		Revision as of 11:09, 2 June 2008 edit undo Dcoetzee (talk \| contribs) 37,529 edits →Variants: Link one-time pad Next edit →
Line 51: == Variants == Modern variants of the running key cipher often replace the traditional ''tabula recta'' with bitwise [[exclusive or]], operate on whole [[byte]]s rather than alphabetic letters, and derive their running keys from large files. Apart from possibly greater entropy density of the files, and the ease of automation, there is little practical difference between such variants and traditional methods. If the running key is random, never reused, and kept secret, the result is a [[one-time pad]], a method that provides perfect secrecy (reveals no information about the plaintext). == Security ==

Running key cipher: Difference between revisions