[h323implementers] NSA H.323 surveilance

Jan Willamowius jan at willamowius.de
Thu Mar 13 12:04:18 EDT 2014


The Intercept just published a few very interesting slides how the NSA
intercepts H.323 (and SIP and Skype) VoIP traffic:


Notice how the HAMMERSTEIN component on page 4 "processes" the call
signaling as man-in-the-middle. This would pretty much match the attack
I have been warning about previously when I wrote "Why your AES
encryption might be worth nothing".


Another interesting fact seems to be that they targeted H.323 and SIP
before taking on Skype (bottom of page 2).


Jan Willamowius, Founder of the GNU Gatekeeper Project
EMail  : jan at willamowius.de
Website: http://www.gnugk.org
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