AhnLab SiteGuard is a security service which prevents a user from connecting to a malicious site. First it inspects a site for any malicious attempts such as iframe injection, then queries whether the site is a phishing site or not. Then the program reports the result to the user. If the site seems to be malicious, then SiteGuard prevents the user from getting into the site, and if not malicious, then it can be bypassed.
The program is good for preventing malicious sites on the web, but there are two critical drawbacks. First, it can only be attached to a process of Internet Explorer, so users of other browsers such as Firefox or Chrome cannot be benefited. Second, the program is only given in Korean, but since there are alternatives given in English, global users don't have to get this. In fact, like many AhnLab programs, this program only targets Korean users.