Cellphone companies routinely undo the web's privacy protection.

CNN: The Internet is a surveillance state

Rarely are leaks intentional: Somebody at work might post a file on a server to download at home, a wrongly configured server might make too much of a hard drive searchable or a Web site's password-protection might be flimsy enough to be accessible to search engines.

FORBES: Google Me Not

The threats posed by cybergangs to corporate Web sites and databases, or the protection rackets formed in Russia and Brazil, indeed seem to be very serious.

FORBES: Book Review