Here is a PPT deck summary: http://www.jdrosen.net/papers/ice-ietf-tutorial.pdf and a written version of it: http://isoc.org/wp/ietfjournal/?p=117 and the spec itself: http://tools.ietf.org/search/rfc5245 -Jonathan R. Jonathan D. Rosenberg, Ph.D. SkypeID: jdrosen Chief Technology Strategist Mobile: +1 (732) 766-2496 Skype SkypeIn: +1 (408) 465-0361 jdrosen@skype.net http://www.skype.com jdrosen@jdrosen.net http://www.jdrosen.net