A key scheduler for an encryption apparatus using a DES encryption algorithm is disclosed. The key scheduler includes: a first permutation choice unit for permuting a 56-bit block; a first register for storing left 28 bits among the 56-bit block from the first permutation choice unit in accordance with...http://www.google.fr/patents/US20020018562?utm_source=gb-gplus-shareBrevet US20020018562 - Key scheduler for encryption apparatus using data encryption standard algorithm
Key scheduler for encryption apparatus using data encryption standard algorithm
Numéro de demande: 09/879,793 Numéro de publication: US 2002/0018562 A1 Date de dépôt: 13 juin 2001 Brevet délivré: US7123720 ( Date de délivrance 17 oct. 2006)
