Re: Uncovering Spoken Phrases in Encrypted Voice over IP Conversations

From: Mok-Kong Shen <mok-kong.shen@xxxxxxxxxxx>
Date: Thu, 24 Mar 2011 10:40:26 +0100

Am 15.03.2011 16:59, schrieb Francois Grieu:

Or why bulk encryption fails.

Charles V. Wright, Lucas Ballard, Scott E. Coull, Fabian Monrose,
Gerald M. Masson
Uncovering Spoken Phrases in Encrypted Voice over IP Conversations

From the abstract: "we show that it is possible to identify the
phrases spoken within encrypted VoIP calls when the audio is
encoded using variable bit rate codecs"

http://portal.acm.org/citation.cfm?doid=1880022.1880029

Interesting. BTW, this shows that the antique idea of the number
stations was not a too bad one for its time.

M. K. Shen
.

References:
- Uncovering Spoken Phrases in Encrypted Voice over IP Conversations
  - From: Francois Grieu

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