[cryptography] The NSA and secure VoIP

Marsh Ray marsh at extendedsubset.com
Fri Mar 2 02:59:50 EST 2012


On 03/01/2012 09:31 PM, Jeffrey Walton wrote:
> Interesting. I seem to recall that cascading ciphers is frowned upon
> on sci.crypt. I wonder if this is mis-information....

Not mis-information. You could easily end up enabling a 
meet-in-the-middle attack just like double DES.

https://en.wikipedia.org/wiki/Meet-in-the-middle_attack

- Marsh



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