| 摘要 |
<p>When a request for reading a file (131b) on a recording medium (131) has been issued, a file system (121a) of an operating system (121) collates the key information specified by a user program (131a) in the read request with the key information set in a file management table (131c) as attribute information for the file (131b) and determines whether to permit the reading of the file (131b) on the basis of the collation result. Therefore, although the file read request from a program (131a) in which the key information for the file (131b) registered in the file management table (131c) has been incorporated and which can issue the key information at the time of requesting file reading is permitted, none of the file read requests from the other programs are not accepted. This puts a limit on programs that can read files from software-distribution recording mediums, thereby enhancing software copy protection. <IMAGE></p> |
