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

[joel jaeggli <joelja () bogus com>]

On Nov 1, 2013, at 7:06 PM, Harry Hoffman <hhoffman () ip-solutions net> wrote:

> That's with a recommendation of using RC4.

it’s also with 1024 bit keys in the key exchange.

> 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.
>
> Cheers,
> Harry
>
> Niels Bakker <niels=nanog () bakker net> wrote:
>
> > * mikal () stillhq com (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.
> >
> > False: https://www.imperialviolet.org/2010/06/25/overclocking-ssl.html
> >
> > "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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