COUNTERMEASURE METHOD FOR TARGETED E-MAIL ATTACK BY IMAGE REPLACEMENT METHOD OF DATA TRANSMITTED BY MULTIPART MIME DATA

摘要

PROBLEM TO BE SOLVED: To invalidate an unauthorized program executed via an attached file or URL by a computer virus, particularly in a targeted e-mail attack.SOLUTION: A file or URL attached to e-mail is represented as an image so as to allow confirmation of content of the file without opening the file; and content of a website from an URL described in e-mail can be confirmed without browsing the website so as to eliminate possibility of execution of an unauthorized program itself via a file or URL attached to e-mail.