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EP0952697

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EP About this file: EP0952697

EP0952697 - Elliptic curve encryption method and system [Right-click to bookmark this link]
Status	No opposition filed within time limit Status updated on 03.03.2006 Database last updated on 03.06.2024
Most recent event Tooltip	03.03.2006	No opposition filed within time limit	published on 19.04.2006 [2006/16]
Applicant(s)	For all designated states Hitachi, Ltd. 6, Kanda Surugadai 4-chome Chiyoda-ku Tokyo 101-8010 / JP
	[N/P]
Former [1999/43]	For all designated states Hitachi, Ltd. 6, Kanda Surugadai 4-chome Chiyoda-ku, Tokyo 101-8010 / JP
Inventor(s)	01 / Kurumatani, Hiroyuki 887-1-708, Kamiyabecho, Totsuka-ku Yokohama-shi / JP
	[1999/43]
Representative(s)	Strehl Schübel-Hopf & Partner Maximilianstrasse 54 80538 München / DE
	[1999/43]
Application number, filing date	99103480.2	23.02.1999
	[1999/43]
Priority number, date	JP19980044851	26.02.1998 Original published format: JP 4485198
	[1999/43]
Filing language	EN
Procedural language	EN
Publication	Type:	A2 Application without search report
	No.:	EP0952697
	Date:	27.10.1999
	Language:	EN
	[1999/43]
	Type:	A3 Search report
	No.:	EP0952697
	Date:	14.05.2003
	[2003/20]
	Type:	B1 Patent specification
	No.:	EP0952697
	Date:	27.04.2005
	Language:	EN
	[2005/17]
Search report(s)	(Supplementary) European search report - dispatched on:	EP	27.03.2003
Classification	IPC:	H04L9/30, G06F7/72	[2003/05]
	CPC:	G06F7/725 (EP,US); H04L9/3066 (EP,US); G06F7/728 (EP,US)
	Former IPC [1999/43]	H04L9/30
Designated contracting states	CH, DE, FR, GB, LI [2004/06]
Former [1999/43]	AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LI, LU, MC, NL, PT, SE
Title	German:	Verschlüsselungsverfahren und Vorrichtung unter Verwendung einer elliptischen Kurve	[1999/43]
	English:	Elliptic curve encryption method and system	[1999/43]
	French:	Procédé et système de chiffrage utilisant une courbe elliptique	[2004/40]
	Former [1999/43]	Procédé et systèmede chiffrage utilisant une courbe elliptique
Examination procedure	21.05.2003	Examination requested [2003/30]
	02.09.2003	Despatch of a communication from the examining division (Time limit: M06)
	12.03.2004	Reply to a communication from the examining division
	17.09.2004	Communication of intention to grant the patent
	26.01.2005	Fee for grant paid
	26.01.2005	Fee for publishing/printing paid
Opposition(s)	30.01.2006	No opposition filed within time limit [2006/16]
Fees paid	Renewal fee
	20.02.2001	Renewal fee patent year 03
	26.02.2002	Renewal fee patent year 04
	20.02.2003	Renewal fee patent year 05
	23.02.2004	Renewal fee patent year 06
	24.02.2005	Renewal fee patent year 07
Opt-out from the exclusive Tooltip competence of the Unified Patent Court	See the Register of the Unified Patent Court for opt-out data
	Responsibility for the accuracy, completeness or quality of the data displayed under the link provided lies entirely with the Unified Patent Court.
Documents cited:	Search	[A]JPH0756506 ;
		[X]US5442707 (MIYAJI ATSUKO [JP], et al) [X] 2,3,5,6 * abstract * * column 20, line 28 - column 21, line 3 *;
		[DA]US5463690 (CRANDALL RICHARD E [US]) [DA] 2,3,5,6 * abstract * * column 8, line 25 - column 10, line 48 * * column 13, line 13 - column 14, line 17 *;
		[DX] - CHUDNOVSKY D V ET AL, "SEQUENCES OF NUMBERS GENERATED BY ADDITION IN FORMAL GROUPS AND NEWPRIMALITY AND FACTORIZATION TESTS", ADVANCES IN APPLIED MATHEMATICS, ACADEMIC PRESS, SAN DIEGO, CA, US, (1986), vol. 7, ISSN 0196-8858, pages 385 - 434, XP008000716 [DX] 1,4,7-10 * page 413 - page 416 * * paragraph [04.2] * DOI: http://dx.doi.org/10.1016/0196-8858(86)90023-0
		[A] - PATENT ABSTRACTS OF JAPAN, (19950731), vol. 1995, no. 06, & JP07056506 A 19950303 (NIPPON TELEGR & TELEPH CORP) [A] 1,4,7-10 * abstract *
		[DA] - MENEZES A J OORSCHOT VAN P C VANSTONE S A, "Handbook of applied cryptography", HANDBOOK OF APPLIED CRYPTOGRAPHY, CRC PRESS SERIES ON DISCRETE MATHEMATICES AND ITS APPLICATIONS, BOCA RATON, FL, CRC PRESS, US, (1997), ISBN 0-8493-8523-7, pages 591 - 607, XP002955512 [DA] 2,3,5,6 * page 599, paragraph 14.3 - page 606 * * paragraph [14.3.2] * * paragraph [14.3.4] *
		[A] - SOLINAS J A, "AN IMPROVED ALGORITHM FOR ARITHMETIC ON A FAMILY OF ELLIPTIC CURVES", ADVANCES IN CRYPTOLOGY - CRYPTO '97. SANTA BARBARA, AUG. 17 - 21, 1997, PROCEEDINGS OF THE ANNUAL INTERNATIONAL CRYPTOLOGY CONFERENCE (CRYPTO), BERLIN, SPRINGER, DE, (19970817), vol. CONF. 17, ISBN 3-540-63384-7, pages 357 - 371, XP000859049 [A] 1-10 * abstract *
		[A] - GUAJARDO J ET AL, "EFFICIENT ALGORITHMS FOR ELLIPTIC CURVE CRYPTOSYSTEMS", ADVANCES IN CRYPTOLOGY - CRYPTO '97. SANTA BARBARA, AUG. 17 - 21, 1997, PROCEEDINGS OF THE ANNUAL INTERNATIONAL CRYPTOLOGY CONFERENCE (CRYPTO), BERLIN, SPRINGER, DE, (19970817), vol. CONF. 17, ISBN 3-540-63384-7, pages 342 - 356, XP000767545 [A] 1-10 * abstract *
		[A] - MENEZES A J ET AL, "ELLIPTIC CURVE CRYPTOSYSTEMS AND THEIR IMPLEMENTATION", JOURNAL OF CRYPTOLOGY, NEW YORK, NY, US, (1992), vol. 6, no. 4, pages 209 - 224, XP002069135 [A] 1-10 * the whole document *

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