Title:
多項式に基づいたマルチユーザ用の鍵生成および認証方法と認証システム
Document Type and Number:
Japanese Patent JP2005520395
Kind Code:
A
Abstract:
A method of generating a common secret between a first party and a second party, preferably devices ( 101 - 105 ) in a home network ( 100 ) that operate in accordance with a Digital Rights Management (DRM) framework. The devices calculate the common secret by evaluating the product of two polynomials P(x, y) and Q(x, z) using parameters previously distributed by a Trusted Third Party (TTP) and parameters obtained from the other party. Preferably the parties subsequently verify that the other party has generated the same secret using a zero-knowledge protocol or a commitment-based protocol. The method is particularly suitable for very low power devices such as Chip-In-Disc type devices.
Inventors:
Twills, Pim, Tee
Kevenal, Thomas, Ah., M
Shri Yen, Geert, Yachts
Van Diyuk, Marten, A
Kevenal, Thomas, Ah., M
Shri Yen, Geert, Yachts
Van Diyuk, Marten, A
Application Number:
JP2003575553A
Publication Date:
July 07, 2005
Filing Date:
February 14, 2003
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
H04L9/08; H04L9/32; H04L12/28; (IPC1-7): H04L9/08
Attorney, Agent or Firm:
Masao Sawada