Multiple-use smart card with security features and method

Abstract

A smart card is adapted to partially include and employ a triply-secure algorithm for data exchange. The algorithm verifies a user's identity and his simultaneous membership in any groups that he has joined. For this purpose, the algorithm requires only a single insertion of the smart card and only a single input of the user's personal identification number. The algorithm can be used in smart cards or in computer networks for identity verification and membership proof. A combination of three different hard problems is used. The first one is based on integer factorization, such as the RSA authenticating technique, and the second one is based on a discrete logarithm, and the third one is based on the coefficients of a polynomial function. In a typical application using smart cards, a certification authority (CA) establishes requirements for preparation and issuance of a multi-purpose card.

Dependencies are inferred from the claim text.