If masking your cellphone number is difficult, hiding your online activity is nearly impossible. Anytime you access the Internet, your Internet service provider (ISP) knows you're online, and it might soon keep track of more. In 2005, the European Parliament passed legislation requiring phone and Internet providers to retain records of calls and online activity for between six months and two years. In 2006, then–U.S. attorney general Alberto Gonzales and FBI director Robert Mueller met privately with America's major ISPs to request that they, too, hold on to these records for two years. Search engines already keep records of queries, a practice that's become enough of a concern among users that in December, Ask.com launched AskEraser, a service that deletes your searches within hours. When you send an unencrypted e-mail, it can be intercepted and read and may be stored indefinitely on a server, even if you've deleted it. And Web sites routinely retain such information as how you got there, how long you lingered on each page, and your scrolling, clicks and mouse-overs.