07277540 is referenced by 60 patents and cites 32 patents.

An arithmetic apparatus for performing a long product-sum operation includes an integer unit arithmetic circuit, a finite field GF(2^m) based unit arithmetic circuit logically adjacent to the integer unit arithmetic circuit, a selector for selecting the integer unit arithmetic circuit or the finite field GF(2^m) based unit arithmetic circuit, and an adder circuit which has a buffer for storing interim result data, adds the interim result data to the result data obtained by one of the integer unit arithmetic circuit and the finite field GF(2^m) based unit arithmetic circuit which is selected by the selector, propagates a carry in an integer unit arithmetic operation, and propagates no carry in a finite field GF(2^m) based unit arithmetic operation.

Title
Arithmetic method and apparatus and crypto processing apparatus for performing multiple types of cryptography
Application Number
9/487483
Publication Number
7277540 (B1)
Application Date
January 19, 2000
Publication Date
October 2, 2007
Inventor
Shinichi Kawamura
Kodaira
JP
Masue Shiba
Fuchu
JP
Agent
Finnegan Henderson Farabow Garrett & Dunner L
Assignee
Kabushiki Kaisha Toshiba
JP
IPC
G06F 7/44
G06J 1/00
G06F 15/00
G06F 7/00
H04L 9/28
H04L 9/00
H04K 1/00
View Original Source