FILE GROUP MATCHING VERIFICATION SYSTEM, FILE GROUP MATCHING VERIFICATION METHOD, AND PROGRAM FOR FILE GROUP MATCHING VERIFICATION

摘要

At a reference time point, a check code generation means (10) generates, on the basis of metadata relating to files satisfying a designated condition, a first check code uniquely indicating the characteristics of a first file group having the files satisfying the condition as the components thereof. At a verification time point after the reference time point, the check code generation means (10) generates, on the basis of metadata relating to files satisfying the condition, a second check code uniquely indicating the characteristics of a second file group having the files satisfying the condition as the components thereof. A mismatch detection means (20) compares the first check code and the second check code, and detects a mismatch between the first file group and the second file group by a mismatch between both the check codes.