Historical
Feistel networks were first seen commercially in IBM's Lucifer cipher, designed by Horst Feistel and Don Coppersmith in 1973. Feistel networks gained respectability when the U.S. Federal Government adopted the DES (a cipher based on Lucifer, with changes made by the NSA). Like other components of the DES, the iterative nature of the Feistel construction makes implementing the cryptosystem in hardware easier (particularly on the hardware available at the time of DES' design).
Read more about this topic: Feistel Cipher
Famous quotes containing the word historical:
“The proverbial notion of historical distance consists in our having lost ninety-five of every hundred original facts, so the remaining ones can be arranged however one likes.”
—Robert Musil (1880–1942)
“Historical! Must it be historical to catch your attention? Even though historicity, like notoriety, denotes nothing more than that something has occurred.”
—Franz Grillparzer (1791–1872)
“The analogy between the mind and a computer fails for many reasons. The brain is constructed by principles that assure diversity and degeneracy. Unlike a computer, it has no replicative memory. It is historical and value driven. It forms categories by internal criteria and by constraints acting at many scales, not by means of a syntactically constructed program. The world with which the brain interacts is not unequivocally made up of classical categories.”
—Gerald M. Edelman (b. 1928)