Global Patent Index - EP 1095483 A1

EP 1095483 A1 2001-05-02 - A KEY-AGREEMENT SYSTEM AND METHOD

Title (en)

A KEY-AGREEMENT SYSTEM AND METHOD

Title (de)

VORRICHTUNG UND VERFAHREN ZUR SCHLÜSSELÜBEREINKUNFT

Title (fr)

SYST ME ET PROC D D'AGR MENT DE CL S

Publication

EP 1095483 A1 (EN)

Application

EP 99928197 A

Priority

  • IL 9900361 W
  • IL 12522298 A

Abstract (en)

[origin: WO0005836A1] A method for carrying out a key distribution process, whereby each member (Useri) who uses the services of a Certifying Authority (CA) is provided with a member's public key (PUi) and a member's private key (si), wherein said process is effected over a finite group of points comprising the steps of: (1) permitting said Certifying Authority to select a generating group-point (G); (2) to generate a random Certifying Authority private key (d); (3) to generate a Certifying Authority public key (PS) (PS=d*G); (4) permitting said member (Useri) to generate a first member's random value (xi) and calculate a first intermediate member's public key (xi*G); (6) permitting said Certifying Authority to calculate said member's public key (PUi) and member's intermediate private key (pi), wherein: a second member's random value (yi) is generated and a second intermediate member's public key (yi*G) is calculated, said member's public key (PUi) is calculated: PUi = xi*G + yi*G, a member's temporary value (H(IDi, PUi)) is calculated by operating with a hash transformation (H), said member's intermediate private key (pi) is calculated (pi=H(IDi, PUi)*d+yi); (7) permitting said member to generate said member's private key (si) (si=pi+xi).

IPC 1-7 (main, further and additional classification)

H04L 9/08; H04L 9/30

IPC 8 full level (invention and additional information)

H04L 9/08 (2006.01); H04L 9/30 (2006.01)

CPC (invention and additional information)

H04L 9/083 (2013.01); H04L 9/0844 (2013.01); H04L 9/3013 (2013.01)

Citation (search report)

See references of WO 0005836A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

EPO simple patent family

WO 0005836 A1 20000203; AU 4530799 A 20000214; CA 2336372 A1 20000203; EP 1095483 A1 20010502; IL 125222 D0 19990312

INPADOC legal status


2003-09-03 [18D] APPLICATION DEEMED TO BE WITHDRAWN

- Effective date: 20030201

2001-05-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 20010103

2001-05-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

2001-05-02 [AX] REQUEST FOR EXTENSION OF THE EUROPEAN PATENT TO:

- Free text: AL;LT;LV;MK;RO;SI