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Re:[CSAIL - MIT]: New Wi-Fi security method does not require... by wccrawford on Monday August 22, 2011 @01:45PM (#2913313)
While I think it -could- work, no 2 people could authenticate at the same time, even to different access points. That would be a nightmare for conventions.
Re:[CSAIL - MIT]: New Wi-Fi security method does not require... by brlewis on Monday August 22, 2011 @02:08PM (#2913400)
I wouldn't read the word "silence" in this article as a precise term. Check out their abstract/paper:

http://www.usenix.org/events/sec11/tech/tech.html#Gollakota

The abstract says they've made it work on busy networks.