
Earlier this year I spoke at Harvard on my work on creating free (as in freedom) secure telephony software built around the ZRTP stack and GNU SIP Witch, for direct public use. There is finally a video of this presentation available:
http://balance.fsf.org/video/lp2010-sun-gnu-telephony.ogv
Unfortunately the very beginning seems to have been missed. It seems to pick up right as I was making a point about the first amendment not being meant to protect "popular" speech, which, by definition, generally requires no special protections, but rather to protect unpopular speech.
The slides from this presentation are available at: