Surveillance Self-Defense

The Electronic Frontier Foundation (EFF) has created this Surveillance Self-Defense site to educate the American public about the law and technology of government surveillance in the United States, providing the information and tools necessary to evaluate the threat of surveillance and take appropriate steps to defend against it.

Surveillance Self-Defense (SSD) exists to answer two main questions: What can the government legally do to spy on your computer data and communications? And what can you legally do to protect yourself against such spying?

Even though this is a US-centric site, you are surfing US sites, maybe storing your email on one or more of them, your MySpace and Facebook, chats, and so on are crossing borders constantly. So this article is applicable to almost everyone, at least technically, if not legally.