CONTENT REPRODUCING DEVICE, SECURE PROCESSING PROGRAM, RECORDING MEDIUM WITH SECURE PROCESSING PROGRAM RECORDED THEREON, RIGHT MANAGEMENT PROGRAM AND RECORDING MEDIUM WITH RIGHT MANAGEMENT PROGRAM RECORDED THEREON

摘要

PROBLEM TO BE SOLVED: To provide a device capable of executing a protection target program operated by a secure processing part before update even if a decryption key is simultaneously updated when the secure processing part is updated in the device provided with the secure processing part for providing the program protection function and a protection target program protected by the secure processing part. SOLUTION: The device has a first program holding an encrypted program and a second program for decrypting and executing the encrypted program, wherein the first program has information required to decrypt the encrypted program and the second program has a key for decrypting the encrypted program. The second program reads the information required for decryption from the first program and uses a decrypting key corresponding to the information required for decryption to thereby be able to decrypt and execute the encrypted program. COPYRIGHT: (C)2006,JPO&NCIPI