Patent ID: 7000110
Filing Date: 2006-02-14
Classification: G06F,H04L

Abstract:
1. A method for generating a one-way function dependent on a one-way function H and a unique value d for a user, comprising: holding in memory a function generation unique value s by a right issuer for the user; creating a value generation unique value u in a unique value calculation unit from the function generation unique value s provided from the memory and the unique value d, the value generation unique value u being provided as a series of m values where u=(u creating by a hash value calculation unit a one-way function value X(M) of a message M by applying the one-way function H to the value generation unique value u from the unique value calculation unit and the message M, where the one-way function value X(M)=H(u holding a certificate C to prove a public key y paired with the one-way function value X(M); issuing a capability χ from the right issuer to the user, the capability χ representing a right of the user in association with the message M; and verifying the user from the public key y and the capability χ by a right verifier.