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Extract from the Register of European Patents

EP About this file: EP1540875

EP1540875 - CERTIFICATE-BASED ENCRYPTION AND PUBLIC KEY INFRASTRUCTURE [Right-click to bookmark this link]
Status	The application is deemed to be withdrawn Status updated on 09.10.2015 Database last updated on 10.07.2024
Most recent event Tooltip	09.10.2015	Change or deletion - application deemed withdrawn	published on 11.11.2015 [2015/46]
Applicant(s)	For all designated states NTT DoCoMo, Inc. Sanno Park Tower 11-1 Nagata-cho 2-chome Chiyoda-Ku Tokyo 100-6150 / JP
	[N/P]
Former [2006/13]	For all designated states NTT DoCoMo Inc. Sanno Park Tower 11-1 Nagata-cho 2-chome Chiyoda-Ku Tokyo 100-6150 / JP
Former [2005/24]	For all designated states DoCoMo Communications Laboratories USA, Inc. 181 Metro Drive, Suite 300 San Jose, CA 95110 / US
Inventor(s)	01 / GENTRY, Craig 230 Houghton St. Mountain View, CA 94041 / US
	[2005/24]
Representative(s)	Skone James, Robert Edmund Gill Jennings & Every LLP The Broadgate Tower 20 Primrose Street London EC2A 2ES / GB
	[N/P]
Former [2005/24]	Skone James, Robert Edmund GILL JENNINGS & EVERY, Broadgate House, 7 Eldon Street London EC2M 7LH / GB
Application number, filing date	03791846.3	28.08.2003
	[2005/24]
	WO2003US26834
Priority number, date	US20020406721P	28.08.2002 Original published format: US 406721 P
	US20020412221P	20.09.2002 Original published format: US 412221 P
	[2005/24]
Filing language	EN
Procedural language	EN
Publication	Type:	A1 Application with search report
	No.:	WO2004021638
	Date:	11.03.2004
	Language:	EN
	[2004/11]
	Type:	A1 Application with search report
	No.:	EP1540875
	Date:	15.06.2005
	Language:	EN
	The application published by WIPO in one of the EPO official languages on 11.03.2004 takes the place of the publication of the European patent application.
	[2005/24]
Search report(s)	International search report - published on:	US	11.03.2004
	(Supplementary) European search report - dispatched on:	EP	28.12.2010
Classification	IPC:	H04L9/00	[2005/24]
	CPC:	H04L9/0847 (EP,US); H04L9/0836 (EP,US); H04L9/3073 (EP,US); H04L9/3265 (EP,US)
Designated contracting states	DE, GB [2005/51]
Former [2005/24]	AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LI, LU, MC, NL, PT, RO, SE, SI, SK, TR
Extension states	AL	Not yet paid
	LT	Not yet paid
	LV	Not yet paid
	MK	Not yet paid
Title	German:	INFRASTRUKTUR MIT AUF ZERTIFIKAT BASIERENDER VERSCHL SSELUNG UND FFENTLICHEM SCHL SSEL	[2005/24]
	English:	CERTIFICATE-BASED ENCRYPTION AND PUBLIC KEY INFRASTRUCTURE	[2005/24]
	French:	CRYPTAGE SUR LA BASE DE CERTIFICATS ET INFRASTRUCTURE A CLE PUBLIQUE	[2005/24]
Entry into regional phase	24.03.2005	National basic fee paid
	24.03.2005	Search fee paid
	24.03.2005	Designation fee(s) paid
	24.03.2005	Examination fee paid
Examination procedure	24.03.2005	Amendment by applicant (claims and/or description)
	24.03.2005	Examination requested [2005/24]
	07.04.2011	Despatch of a communication from the examining division (Time limit: M04)
	16.08.2011	Reply to a communication from the examining division
	23.02.2012	Despatch of a communication from the examining division (Time limit: M04)
	15.06.2012	Reply to a communication from the examining division
	01.03.2015	Application deemed to be withdrawn, date of legal effect [2015/32]
	03.03.2015	Application deemed to be withdrawn, date of legal effect [2015/46]
	27.03.2015	Despatch of communication that the application is deemed to be withdrawn, reason: renewal fee not paid in time [2015/46]
Divisional application(s)	The date of the Examining Division's first communication in respect of the earliest application for which a communication has been issued is 07.04.2011
Fees paid	Renewal fee
	24.03.2005	Renewal fee patent year 03
	29.08.2006	Renewal fee patent year 04
	29.08.2007	Renewal fee patent year 05
	25.08.2008	Renewal fee patent year 06
	30.06.2009	Renewal fee patent year 07
	25.08.2010	Renewal fee patent year 08
	25.08.2011	Renewal fee patent year 09
	27.08.2012	Renewal fee patent year 10
	27.08.2013	Renewal fee patent year 11
	Penalty fee
	Additional fee for renewal fee
	31.08.2014	12 M06 Not yet paid
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	[Y] - BONEH D ET AL, "IDENTITY-BASED ENCRYPTION FROM THE WEIL PAIRING", ADVANCES IN CRYPTOLOGY. CRYPTO 2001. 21ST ANNUAL INTERNATIONAL CRYPTOLOGY CONFERENCE, SANTA BARBARA, CA, AUG. 19 - 23, 2001. PROCEEDINGS; [LECTURE NOTES IN COMPUTER SCIENCE ; VOL. 2139], BERLIN : SPRINGER.; DE, (20010819), ISBN 978-3-540-42456-7, pages 213 - 229, XP000988703 [Y] 1-17 * Introduction of section 1; sections 1.1, 4.3, and 5 *
		[I] - SMART N P, "Identity-based authenticated key agreement protocol based on Weil pairing", ELECTRONICS LETTERS, IEE STEVENAGE, GB, (20020620), vol. 38, no. 13, doi:10.1049/EL:20020387, ISSN 0013-5194, pages 630 - 632, XP006018324 [I] 1-3,6-8,11-14,16,17 * pages 630-632 * DOI: http://dx.doi.org/10.1049/el:20020387
		[I] - BROWN D R L ET AL, "Provably secure implicit certificate schemes", FINANCIAL CRYPTOGRAPHY : 5TH INTERNATIONAL CONFERENCE ; PROCEEDINGS / FC 2001, GRAND CAYMAN, BRITISH WEST INDIES, FEBRUARY 19 - 22, 2001 (IN: LECTURES NOTES IN COMPUTER SCIENCE); [LECTURE NOTES IN COMPUTER SCIENCE ; 2339], SPRINGER, BERLIN, DE, (20020101), vol. 2339, ISBN 978-3-540-44079-6, pages 156 - 165, XP002524293 [I] 1-3,6-8,11-14,16,17 * section 3;;; figure 1 *
		[YP] - CHEN L ET AL, "CERTIFICATION OF PUBLIC KEYS WITHIN AN IDENTITY BASED SYSTEM", PARALLEL AND DISTRIBUTED PROCESSING AND APPLICATIONS: SECOND INTERNATIONAL SYMPOSIUM, ISPA 2004 PROCEEDINGS, HONG KONG, CHINA, DECEMBER 13 - 15, 2004 (IN: LECTURE NOTES IN COMPUTER SCIENCES), SPRINGER, DE, (20020930), vol. 2433, doi:10.1007/3-540-45811-5_25, ISBN 978-3-540-24128-7, pages 322 - 333, XP001170398 [YP] 1-17 * section 5 * DOI: http://dx.doi.org/10.1007/3-540-45811-5_25
		[YP] - CHEN L ET AL, "Applications of multiple trust authorities in pairing based cryptosystems", PARALLEL AND DISTRIBUTED PROCESSING AND APPLICATIONS: SECOND INTERNATIONAL SYMPOSIUM, ISPA 2004 PROCEEDINGS, HONG KONG, CHINA, DECEMBER 13 - 15, 2004 (IN: LECTURE NOTES IN COMPUTER SCIENCES), SPRINGER, DE, (20021001), vol. 2437, doi:10.1007/3-540-45831-X_18, ISBN 978-3-540-24128-7, pages 260 - 275, XP002336246 [YP] 1-17 * the whole document * DOI: http://dx.doi.org/10.1007/3-540-45831-X_18
		[A] - GENTRY C ET AL, "Hierarchical ID-Based Cryptography", PARALLEL AND DISTRIBUTED PROCESSING AND APPLICATIONS: SECOND INTERNATIONAL SYMPOSIUM, ISPA 2004 PROCEEDINGS, HONG KONG, CHINA, DECEMBER 13 - 15, 2004 (IN: LECTURE NOTES IN COMPUTER SCIENCES), SPRINGER, DE, (20020101), vol. 2501, doi:10.1007/3-540-36178-2_34, ISBN 978-3-540-24128-7, pages 548 - 566, XP002396667 [A] 1-17 * sections 3, 5, and 6 * DOI: http://dx.doi.org/10.1007/3-540-36178-2_34
	International search	[Y]US5867578 (BRICKELL ERNEST F [US], et al);
		[Y]US5774552 (GRIMMER FRANCINE GAIL [US])
	by applicant	- "An Efficient Hierarchical Identity-Based Key-Sharing Method Resistant Against Collusion Attacks", G. HANAOKA, T. NISHIOKA, Y. ZHENG, H. IMAI, ADVANCES IN CRYPTOGRAPHY?ASIACRYPT 1999, SPRINGER, (1999), vol. 1716, pages 348 - 362
		- G. HANAOKA, T. NISHIOKA, Y. ZHENG, H. IMAI, "A Hierarchical Non-Interactive Key-Sharing Scheme With Low Memory Size and High Resistance Against Collusion Attacks", THE COMPUTER JOURNAL

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