Cryptography – Particular algorithmic function encoding
Reexamination Certificate
2006-09-05
2006-09-05
Sheikh, Ayaz (Department: 2136)
Cryptography
Particular algorithmic function encoding
C380S029000
Reexamination Certificate
active
07103180
ABSTRACT:
An efficient software implementation of the round function of the Data Encryption Standard (DES) involves mathematical transformations performed on the DES round function and the DES round key computation function that reduce the computation required to complete a DES round on general-purpose, embedded, and cryptographic processors. These transformations shift computation associated with the Expansion Permutation from the DES round function to the DES round key computation function. As a result, fewer instructions are required to compute the inputs of the DES S-boxes in the round function.
REFERENCES:
patent: 3962539 (1976-06-01), Ehrsam et al.
patent: 4262358 (1981-04-01), Marino, Jr.
patent: 4274085 (1981-06-01), Marino, Jr.
patent: 4275265 (1981-06-01), Davida et al.
patent: 4543646 (1985-09-01), Ambrosius et al.
patent: 4578530 (1986-03-01), Zeidler
patent: 4731843 (1988-03-01), Holmquist
patent: 5003597 (1991-03-01), Merkle
patent: 5008935 (1991-04-01), Roberts
patent: 5214703 (1993-05-01), Massey et al.
patent: 5317638 (1994-05-01), Kao et al.
patent: 5432848 (1995-07-01), Butter et al.
patent: 5511123 (1996-04-01), Adams
patent: 5513262 (1996-04-01), van Rumpt et al.
patent: 5623549 (1997-04-01), Ritter
patent: 5673319 (1997-09-01), Bellare et al.
patent: 5724428 (1998-03-01), Rivest
patent: 5745577 (1998-04-01), Leech
patent: 5796837 (1998-08-01), Kim et al.
patent: 5825886 (1998-10-01), Adams et al.
patent: 5835599 (1998-11-01), Buer
patent: 5835600 (1998-11-01), Rivest
patent: 5838795 (1998-11-01), Mittenthal
patent: 5861662 (1999-01-01), Candelore
patent: 6005944 (1999-12-01), Blaze
patent: 6031911 (2000-02-01), Adams et al.
patent: 6199162 (2001-03-01), Luyster
patent: 6215875 (2001-04-01), Nohda
patent: 6226382 (2001-05-01), M'Raihi et al.
patent: 6266412 (2001-07-01), Berenzweig et al.
patent: 6278783 (2001-08-01), Kocher et al.
patent: 6314186 (2001-11-01), Lee et al.
patent: 6320964 (2001-11-01), Callum
patent: 6324286 (2001-11-01), Lai et al.
patent: 6526505 (2003-02-01), Epstein
patent: 6578061 (2003-06-01), Aoki et al.
patent: 6578150 (2003-06-01), Luyster
patent: 6751319 (2004-06-01), Luyster
patent: 6775776 (2004-08-01), Vogt et al.
patent: 6891951 (2005-05-01), Inoha et al.
patent: 6914984 (2005-07-01), Lim
patent: 6931127 (2005-08-01), Lim
patent: 2002/0003876 (2002-01-01), Lim
patent: 2002/0009196 (2002-01-01), Lim
patent: 2002/0012430 (2002-01-01), Lim
patent: 2002/0018562 (2002-02-01), Lim
patent: 2002/0051534 (2002-05-01), Matchett et al.
patent: 2003/0002664 (2003-01-01), Anand
patent: 2004/0028232 (2004-02-01), Lindemann et al.
Menezes et al., Handbook of Applied Cryptography, CRC Press, 1997, pp. 250-259.
Eli Biham, A Fast New DES Implementation in Software, Lecture Notes in Computer Science, vol. 1267, Jan. 1997, p. 260.
Bindel et al., “Extended Cryptographic File System,” pp. 1-11 (Dec. 13, 1999).
Blaze, “A Cryptographic File System for Unix,” Proc. of 1st ACM Conf. on Computer & Communications Security, 8 pages (Nov. 1993).
Blaze, “Key Mangement in an Encrypting File System,” Proc. Summer 1994 USENIX Tech. Conf., 9 pages (Jun. 1994).
Zadok et al., “Cryptfs: A Stackable Vnode Level Encryption File System,” Tech. Report CUCS-021-98, pp. 1-11 (1998).
Cervetti David Garcia
Sheikh Ayaz
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