security server, user terminal, web page appraisal method, a program for the security server

摘要

PROBLEM TO BE SOLVED: To identify a legitimate web page by use of an error detection code of the web page.;SOLUTION: For a web page, such as a log-in page, acquired by a user terminal 10 from a web-page providing server 100 for net banking or the like, an error detection code such as a CRC value, is calculated, and is transmitted to a security server 200. The security server 200 receives the error detection code, compares it with a legitimate CRC value stored in advance, and compares a part or all of the source codes, web page domain, and DNS information, to identify whether the web page is a false altered log-in page or a legitimate page.;COPYRIGHT: (C)2015,JPO&INPIT