==See also==* G-DES* Meet-in-the-middle attack* Triple DES==References==* Joe Kilian and Phillip Rogaway, How to protect DES against exhaustive key search(PDF), Advances in Cryptology - Crypto '96, Springer-Verlag (1996), pp.
* DES* Joe Kilian and Phillip Rogaway, How to protect DES against exhaustive key search (PDF), Advances in Cryptology — Crypto '96, Springer-Verlag (1996), pp.