METHOD FOR RESISTING PROGRAM TAMPER USING SERIAL NUMBER AND OBFUSCATING METHODS BY GENERATING OBFUSCATED CODE, METHOD FOR UPGRADING OBFUSCATED PROGRAM, AND DEVICE FOR THE SAME

摘要

PURPOSE: A method for resisting program tamper using a serial number and obfuscating methods, the method for upgrading an obfuscated program, and the device for the same are provided to resist illegal copy by using the multiple obfuscating methods for one original code. CONSTITUTION: An obfuscation processor(110) obfuscates the original or upgrade code. A code table(120) stores the obfuscated code. A serial number generator(130) generates the serial number. A mapper(140) determines the obfuscated code stored in the code table by receiving the serial number. A comparator(160) generates a patch code by comparing the upgraded code with the current obfuscated code and transits the patch code to the code table. An I/O(Input/Output) part(150) exchanges data with a user computer(200) through the Internet or other media. A counter(170) counts a serial number transfer count sent for the upgrade from the user computer.