| 摘要 |
<P>PROBLEM TO BE SOLVED: To improve confidentiality of a memory desired to protect, and also, to inhibit the unauthorized access due to replacement or the like of a memory. <P>SOLUTION: A computer system includes: a memory that stores state information AA, indicating whether or not information to be protected is held in a prescribed memory region of the computer system, and access propriety information BB indicating the access propriety to the memory region; and an access control part that rewrites the state information AA according to writing of the information to be protected in the memory region or deletion of the information to be protected, rewrites the access propriety information BB so as to permit the access to the memory region when it is in a state that the information to be protected is not written in the memory region during the system start-up, and rewrites the access propriety information BB into an access inhibition state when it is in a state other than that state. <P>COPYRIGHT: (C)2011,JPO&INPIT |
