METHOD FOR PROTECTING MICROCOMPUTER SYSTEM, MEMORY DEVICE, COMPUTER PROGRAM, SMART CARD AND MICROCOMPUTER SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a method for protecting a microcomputer system capable of minimizing the abuse of a private key given to the hand of any unauthorized person. ;SOLUTION: In this method for protecting a microcomputer system (75) against the operation of data (10) signed or encrypted by an asymmetric encryption method, and stored in a memory device (76) of the microcomputer system (75), a smart card (74) protected by a personal identification number is used for signature or encrypting the data (10), and a private key (14) and an encryption algorithm for the asymmetric encryption method are stored in the smart card.;COPYRIGHT: (C)2003,JPO