METHOD AND DEVICE FOR DETECTING CONTENT ALTERATION AND RECORDING MEDIUM WITH RECORDED PROCESSING PROGRAM THEREON

摘要

PROBLEM TO BE SOLVED: To provide technology which can find alteration of contents at an early stage. SOLUTION: The content alteration detecting method for detecting alteration of contents has a step for generating alteration detection information, corresponding to the current constitution or contents of plural contents and a step for detecting the alteration of the contents by comparing the alteration detection information, corresponding to the constitution or contents at registration or update of the contents with the generated alteration detection information.