Encryption circuit achieving higher operation speed

Details Encryption circuit achieving higher operation speed Encryption circuit achieving higher operation speed

2003-08-26

2008-12-30

Vu, KimYen (Department: 2135)

Cryptography

Particular algorithmic function encoding

C713S100000

Reexamination Certificate

active

07471789

ABSTRACT:
An addition and subtraction circuit performs addition and subtraction using a carry-in signal from another operation circuit, and outputs a carry-out signal generated through addition and subtraction to another operation circuit. A right-shift circuit performs right-shift using a shift-in signal from another operation circuit, and outputs a shift-out signal generated through right-shift to another operation circuit. Therefore, even if a data length of operation data is extended, a propagation path for a carry can be shortened, and an operation clock frequency of an encryption circuit can be increased.

REFERENCES:
patent: 3643106 (1972-02-01), Berwin et al.
patent: 4658094 (1987-04-01), Clark
patent: 5161193 (1992-11-01), Lampson et al.
patent: 5313530 (1994-05-01), Iwamura
patent: 5321752 (1994-06-01), Iwamura et al.
patent: 5754616 (1998-05-01), Miura
patent: 5765218 (1998-06-01), Ozawa et al.
patent: 5987489 (1999-11-01), Monier
patent: 6035317 (2000-03-01), Guy
patent: 6088453 (2000-07-01), Shimbo
patent: 6101621 (2000-08-01), Kondo
patent: 6341299 (2002-01-01), Romain
patent: 6614864 (2003-09-01), Raphaeli et al.
patent: 6870929 (2005-03-01), Greene
patent: 7017064 (2006-03-01), Thomas et al.
patent: 2002/0065574 (2002-05-01), Nakada
patent: 2002/0101984 (2002-08-01), Asami
patent: 2003/0033340 (2003-02-01), Asami
patent: 2005/0188209 (2005-08-01), Chen et al.
patent: 5-324277 (1993-12-01), None
patent: 7-20778 (1995-01-01), None
patent: 10-269060 (1998-10-01), None
patent: 11-212456 (1999-08-01), None
patent: P2002-229445 (2002-08-01), None
U.S. Appl. No. 10/614,831, filed Jul. 9, 2003, Renesas Technology Corp.

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