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:
“What are your historical Facts; still more your biographical? Wilt thou know a Man ... by stringing-together beadrolls of what thou namest Facts?”
—Thomas Carlyle (1795–1881)
“Yet the companions of the Muses
will keep their collective nose in my books
And weary with historical data, they will turn to my dance tune.”
—Ezra Pound (1885–1972)
“Some minds are as little logical or argumentative as nature; they can offer no reason or “guess,” but they exhibit the solemn and incontrovertible fact. If a historical question arises, they cause the tombs to be opened. Their silent and practical logic convinces the reason and the understanding at the same time. Of such sort is always the only pertinent question and the only satisfactory reply.”
—Henry David Thoreau (1817–1862)