| 摘要 |
A processor having a program protection function, which makes behavior analysis of protected programs difficult and allows improvement in the current program protection level, which is attained by prohibiting reading out/rewriting of instruction codes, is provided. The processor having a program protection function is a processor core module, which protects programs by allowing only reading out of instructions in a decrypted, protected plain text program for being executed and which is constituted by a detecting unit for detecting whether or not an instruction in a protected program is being executed and a prohibiting unit for prohibiting generation of trace information for an instruction being executed when the detecting unit detects that an instruction in a protected program is being executed.
|
