Title:
【発明の名称】制限付きブラインド署名
Document Type and Number:
Japanese Patent JPH09500977
Kind Code:
A
Abstract:
Cryptographic apparatus and means are disclosed for each of three types of participants in an electronic system for privacy-protected transfer of certified information. This invention reveals protocols that improve efficiency and security in such systems, and allows a variety of useful extensions in functionality without difficulty. This is achieved by a restrictive blind signature protocol in combination with a testing protocol. The restrictive blind signature protocol allows the certifying party to encode data into certified information that it provides to a receiving party, such that it cannot be altered or modified by the receiving party. The testing protocol enables parties to prove a variety of characteristics about the encoded data in their certified information.
Inventors:
Brands, Stephanus Alphonse
Application Number:
JP50575795A
Publication Date:
January 28, 1997
Filing Date:
August 01, 1994
Export Citation:
Assignee:
Brands, Stephanus Alphonse
International Classes:
H04L9/32; G06Q20/00; G06Q20/06; G06Q20/36; G06Q20/38; G07F7/10; G09C1/00; G06F7/72; (IPC1-7): G09C1/00; G09C1/00; H04L9/32
Attorney, Agent or Firm:
Aoyama Ryo (2 outside people)