The Security Mentor

Skype encrypts phone calls, but nobody really know how good a job they do.

If you talk about mergers or medical data on the phone, if you live in a country where citizens are spied on by their own government, or if you just want a cool toy, check out Zfone. It's a program for making secure computer-to-computer phone calls that follows industry standards so well that it can talk (insecurely) with other computer-to-computer voice chat programs.