Contravigilància electrònica

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.

EFF Surveillance Self-Defense (html)

EFF Surveillance Self-Defense (text)

Breu, interessant, en anglès i referint-se als EUA, però exportable a casa nostra.