[cryptography] The NSA and secure VoIP

Jeffrey Walton noloader at gmail.com
Thu Mar 1 22:31:59 EST 2012

On Thu, Mar 1, 2012 at 10:27 PM, Steven Bellovin <smb at cs.columbia.edu> wrote:
> http://www.scmagazine.com.au/News/292189,nsa-builds-android-phone-for-top-secret-calls.aspx
> makes for interesting reading.  I was particularly intrigued by this:
>        Voice calls are encrypted twice in accordance with NSA policy,
>        using IPSEC and SRTP, meaning a failure requires “two independent
>        bad things to happen,” Salter said.
> Margaret Salter is the head of the Information Assurance Directorate
> of the NSA.
Interesting. I seem to recall that cascading ciphers is frowned upon
on sci.crypt. I wonder if this is mis-information....

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