OPEN TYPE GENERAL-PURPOSE ATTACK-RESISTANT CPU, AND APPLICATION SYSTEM THEREOF

摘要

A central processing unit (GT) 10 comprises a private key in secrecy, and an encryption engine 16. Before the GT 10 executes software, a license added to the software is entered into the GT 10. The license includes information obtained by encrypting a code encryption key used when the software is encrypted with a public key pairing with the private key. When the license is entered, the encryption engine 16 obtains the code encryption key by decrypting the license with the private key, and decrypts the software with the code encryption key. <IMAGE>