Arithmetic processor accomodating different finite field size

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EP 1 293 891 B8

(12)	CORRECTED EUROPEAN PATENT SPECIFICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 B1)

(48)	Corrigendum issued on:
	14.04.2010 Bulletin 2010/15

(45)	Mention of the grant of the patent:
	03.02.2010 Bulletin 2010/05

(21)	Application number: 02027872.7

(22)	Date of filing: 20.04.1998

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International Patent Classification (IPC):

G06F 7/72^(2006.01)

G06F 9/302^(2006.01)

(54)	Arithmetic processor accomodating different finite field size Arithmetischer Prozessor geeignet für verschiedenen endlichen Feldgrösse. Processeur arithmétique accomodant différentes tailles de champ fini.

(84)	Designated Contracting States:
	CH DE FR GB LI

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Priority:

18.04.1997 GB 9707861

(43)	Date of publication of application:
	19.03.2003 Bulletin 2003/12

(60)	Divisional application:
	03021261.7

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	98920431.8 / 0976027

(73)	Proprietor: Certicom Corp.
	Mississauga, ON L4W 5L1 (CA)

(72)	Inventors:
	Vanstone, Scott A. Campbellville, ON N0P 1B0 (CA) Lambert, Robert J. Cambridge, Ontario N3C 3N3 (CA) Gallant, Robert P. Corner Brook, NL A2H 7J2 (CA) Jurisic, Aleksandar 100 Ljubljana (SI) Vadekar, Ashok V. Rockwood, Ontario N0B 2K0 (CA)

(74)	Representative: Rickard, David John et al
	Ipulse 26 Mallinson Road London SW11 1BP London SW11 1BP (GB)

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References cited: :

EP-A- 0 169 908
US-A- 5 268 854

EP-A- 0 267 836
US-A- 5 459 681

DE WIN E ET AL: "A fast software implementation for arithmetic operations in GF(2)" LECTURE NOTES IN COMPUTER SCIENCE, SPRINGER VERLAG, NEW YORK, NY, US, 1996, pages 65-76, XP002081362 ISSN: 0302-9743
HSU I S ET AL: "A COMPARISON OF VLSI ARCHITECTURE OF FINITE FIELD MULTIPLIERS USINGDUAL, NORMAL, OR STANDARD BASES" IEEE TRANSACTIONS ON COMPUTERS, IEEE INC. NEW YORK, US, vol. 37, no. 6, 1 June 1988 (1988-06-01), pages 735-739, XP000576196 ISSN: 0018-9340
FUCHS K C: "CRYPTOGRAPHIC SIGNAL PROCESSOR" MOTOROLA TECHNICAL DEVELOPMENTS, MOTOROLA INC. SCHAUMBURG, ILLINOIS, US, vol. 27, 1 May 1996 (1996-05-01), pages 81-82, XP000594566 ISSN: 0887-5286

Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).