SIMILARITY EVALUATION SYSTEM, SIMILARITY EVALUATION DEVICE, USER TERMINAL, SIMILARITY EVALUATION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To mechanically perform finer similarity evaluation when entropy values of entire files are close to each other.SOLUTION: Each of user terminals 2to 2transmits a comparison source file and a comparison target file to a similarity evaluation device 3. The similarity evaluation device 3 divides each of the comparison source file and the comparison target file into a plurality of sections by a prescribed division method and calculates, per section, prescribed entropy values from the divided comparison source file and the divided comparison target file and obtains a determination result showing whether the comparison source file and the comparison target file are similar or not on the basis of comparison source section feature quantities and comparison target section feature quantities. Each of user terminals 2to 2displays the determination result received from the similarity evaluation device 3.