INFORMATION PROTECTING METHOD, IMPLEMENTATION APPARATUS THEREFOR, AND PROCESSING PROGRAM THEREFOR

摘要

PROBLEM TO BE SOLVED: To provide technology in which a program or data on a memory can be protected from illegal access to the memory due to the program of an OS level. SOLUTION: The information protecting method has a step for accepting the securing request of a protect area for protecting the program or the data and requesting such securing to an OS, a step for loading the program or the data of a protection target into the protect area secured by the request, a step for accepting the mapping request of the secured protect area and setting the physical page number of that protect area to a corresponding table entry in a page table, a step for accepting the unmapping request of the protect area to which mapping is applied and changing the physical page number of a table entry corresponding to the relevant protect area in the page table, and a step for accepting the releasing request of the secured protect area and requesting such a release to the OS. COPYRIGHT: (C)2003,JPO