latest Snowden docs show NSA intercepts all Google and Yahoo DC-to-DC traffic

Harry Hoffman hhoffman at
Sat Nov 2 02:06:56 UTC 2013

That's with a recommendation of using RC4.
Head on over to the Wikipedia page for SSL/TLS and then decide if you want rc4 to be your preference when trying to defend against a adversary with the resources of a nation-state.


Niels Bakker <niels=nanog at> wrote:

>* mikal at (Michael Still) [Fri 01 Nov 2013, 05:27 CET]:
>>Its about the CPU cost of the crypto. I was once told the number of 
>>CPUs required to do SSL on web search (which I have now forgotten) 
>>and it was a bigger number than you'd expect -- certainly hundreds.
>"On our production frontend machines, SSL/TLS accounts for less than 
>1% of the CPU load, less than 10KB of memory per connection and less 
>than 2% of network overhead. Many people believe that SSL takes a lot 
>of CPU time and we hope the above numbers (public for the first time) 
>will help to dispel that."
>	-- Niels.

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