| dc.description.abstract | Recently, due to the advanced technology developed on the Internet, the Web browser has become one of the essential applications. A Web browser is not only used to surf on the internet, but also plays an important role as a portable operating system. For example, many users edit documents via an on-line editor and store the documents in an on-line storage. All those tasks are done with the help of a Web browser. This results in a large number of attacks on Web browsers. Therefore, the security of Web browsers has become a more and more important issue in recent years.
Through attacking Web browsers, the attackers may get our private information such as surfing habits and passwords. This is because that Web browsers always leave cookies, browsing history, and caches on the computer. To avoid malicious attacks, many Web browsers have developed the mechanism of private browsing mode. In the private browsing mode, a user’s behavior is not traced and his private information is not left either. However, the mechanism still creates files such as bookmarks. Most important of all, the files downloaded through a Web browser are saved on the disk unless the user deletes them himself. This is really a serious threat to the private security of Web users.
We design a mechanism on Windows XP to observe the behavior of creating and deleting files of Firefox in private browsing mode. Then we focus on the files which are not removed, and clear them by our mechanism. We hope that via our mechanism, the Web browsers can provide a comprehensively secure environment.
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