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(12) INTERNATIONAL APPLICATION PUBLISHED UNDER THE PATENT COOPERATION TREATY (PCT) 

(51) International Patent Classification’: GO6F 1/00 

(21) International Application Number: = PCT/IB03/01172 

(22) International Filing Date: 26 March 2003 (26.03.2003) 

(25) Filing Language: 

oor (26) Publication Language: 

(30) Priority Data: 02009568.3 26 April 2002 (26.04.2002) EP 

(71) Applicant (for all designated States except US): INTER- NATIONAL BUSINESS MACHINES CORPORA- TION [US/US]; New Orchard Road, Armond, NY 10504 (US). 

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(75) Inventors/Applicants (for US only): PFITZMANN, Birgit, M, [DE/CH]; Baerenweidstrasse 23, CH-8833 talstrasse 35, CH-8804 AU (CH). 

(54) Title: EFFICIENT BROWSER-BASED IDENTITY MANAGEMENT PROVIDING PERSONAL CONTROL AND ANONYMITY 

(19) World Intellectual Property Organization 

(43) International Publication Date 

6 November 2003 (06.11.2003) 

International Bureau 

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# PCT 

(74) Agent: WILLIAMS, Julian, David; International Busi- ness Machines Corporation, Saeumerstrasse 4 / Postfach, CH-8803 Rueschlikon (CH). 

(81) Designated States (national): AE, AG, AL, AM, AT, AU, AZ, BA, BB, BG, BR, BY, BZ, CA, CH, CN, CO, CR, CU, CZ, DE, DK, DM, DZ, EC, EE, ES, FI, GB, GD, GE, GH, GM, HR, HU, ID, IL, IN, IS, JP, KE, KG, KP, KR, KZ, LC, LK, LR, LS, LT, LU, LV, MA, MD, MG, MK, MN, Mw, MX, MZ, NO, NZ, OM, PH, PL, PT. RO, RU, SC, SD, SE, SG, SK, SL, TJ, TM, TN, TR, TT, TZ, UA, UG, US, UZ, VC, VN, YU, ZA, 2M, ZW. 

English 

. English 

(84) Designated States (regional): ARIPO patent (GH, GM, KE, LS, MW, MZ, SD, SL, SZ, TZ, UG, ZM, ZW), Eurasian patent (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), European patent (AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HU, IE, IT, LU, MC, NL, PT, RO, SE, SI, SK, TR), OAPI patent (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG). 

Published: 

upon receipt of that report 

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(10) International Publication Number 

# WO 03/091861 A2 

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(57) Abstract: The invention allows a reliable and efficient identity management that can, with full interoperability, accommodate to various requirements of participants. For that a method and system are presented for providing an identity-related information about a user to a requesting entity. The method comprises a location-request step initiated by the requesting entity for requesting from a client application a location information that corresponds to a location entity possessing the identity-related information, a redirecting step for connecting the client application to the location entity in order to instruct the location entity to transfer the iden- tity-related information to the requesting entity, and an acquiring step for obtaining the identity-related information. The acquiring step comprises a contact step wherein the location entity contacts the requesting entity, a request step wherein the requesting entity from the location entity. requests the identity-related information, and a response step wherein the requesting entity receives the identity-related information 

