FILE MANAGING PROGRAM

摘要

A file managing program for consolidating files without marring the convenience of the users. The file managing program has a file specifying block (21) which receives specification of an original file to be managed, a policy formulating block (22) for formulating a policy of when the original file is used, and a package block (23) for packaging a policy file created according to a common key created for each original file and the policy and the original file encrypted with the common key and thus creating a package file. The package file is so created that only the user satisfying the use condition of the policy can develop the common key in the policy file and the right to use the original file on a temporary memory of a terminal (4) of the user, can develop the original file encrypted with the common key only on the temporary memory, and can use the original file within the scope of the use right.