Talks held at the Linuxwochen Wien
MiKa and me held three talks at the Linuxwochen Wien 2011. The scheduled talks were „VoIP Security“ and „The Wind Chill Factor of Security“. The third talk was a review of the trust models used with X.509 certificates and issued by certificate authorities. The review was a drop-in replacement talk for a speaker who did not show up. Since the talks were held in German, I’d like to present a short summary in our blog. VoIP has become a well-established technology in companies during the past years. Periodically we assess the security of VoIP protocols and implementations. The talk we gave was a review of the state-of-the-art focussing on SIP signalling and audio/video codecs. We discussed the basics, the SIP Digest Authentication Leak found by Sandro Gauci, SIP probes, the troubles of SIP gateway