Data on the Wire

Electronic Surveillance and Communications Privacy

In this section, you'll learn about what the government can do — technically and legally — when it wants to conduct real-time surveillance of your communications, whether by planting a "bug" to eavesdrop on your face-to-face conversations, "wiretapping" the content of your phone calls and Internet communications, or using "pen registers" and "trap and trace devices" to track who you communicate with and when. We'll also discuss what steps you can take to defend against this kind of surveillance, with a focus on how to use encryption to protect the privacy of your communications.

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