Coupling PAC to Both AP and ID
Original Publication Date: 1983-Nov-01
Included in the Prior Art Database: 2005-Feb-07
This article describes a user verification process that is dependent upon several related input parameters, namely, a user identifier (ID), an authentication parameter (AP) and a personal authentication code (PAC). Use of a system is denied to users unless the correct correspondence between ID, AP and PAC can be demonstrated. When a user opens his account at an issuer institution, the issuer or user selects a secret personal identification number (PINi), the issuer selects a personal key (KPi) and the issuer computes an authentication parameter (APi). The issuer also selects an authentication key KA and computes a personal authentication code (PACi). Thus, referring to Fig.