| With the internet playing an increasingly important role in politics, economics, cultural and life, network security issues have become more and more serious. Problems of distributed denial of service (DDoS) attack, web page tampering, malicious code embedding and dark chains inserted in web pages make people expose their personal information easily, and even irreparable damage could be caused. Especially, some criminals take advantage of the habits of users who do shopping and learning in web sites to do some operations on websites like tampering source codes and inserting dark chains which lead users to enter other websites or loss their privacy information, and these illegal operations made impact on users. Therefore, it is important to develop a system that can scan the web site so that we can know whether a web site is tampered or inserted with dark chains.First of all, we analyzed current technology which was adopted on the solution of the problem of website tampering and introduced the inspection method of tampered website which was used. The advantages and the significances of detecting tampered websites was conducted by combining crawler technology and HASH function. Then, we designed the restriction of the level of web pages which were probed by crawlers and implemented a website tamper detection system which aimed at detecting whether websites were tampered or not. For the more we designed the way of inserting dark chain, and realized the automatic detection of dark chains Finally, we tested the system’s functions and verified that it not only can find the problem of website tamper and dark chain, but also can maintain the security of websites. |
