If the site you're visiting is malicious, the files on your computer, as well as passwords stored in the temporary memory, may be at risk. Generally, organizations use the information that is gathered automatically for legitimate purposes, such as generating statistics about their sites. Be careful supplying personal information. Unless you trust a site, don't give your address, password, or credit card information. Look for indications that the site uses SSL to encrypt your information. Although some sites require you to supply your Social Security number (e.g., sites associated with financial transactions such as loans or credit cards), be especially wary of providing this information online.