Re: [tor-talk] NSA supercomputer

[George Torwell <bpmcontrol@xxxxxxxxx>]

i may be wrong but:
- we are talking about keys of every node along the path. how can you
increase that just locally?
- keep in mind that we dont know if factoring such a key is likely, if i
remember correctly that talk mentioned huge amounts of computation power
and electricity.
    something like a year for a 40 mega watt consuming data center per 1024
bit key. <maybe way off, but the point being - its really expensive.>
    on the other hand its rumored that the utah data center will have 65
mega watts from its own power station.
im pretty sure that the developers will move us safely from these keys as
soon as its needed :)


On 4 April 2013 13:54, Bernard Tyers <ei8fdb@xxxxxxxxxx> wrote:

> That's what I was thinking, I just didn't know if there was another
> reasons.
>
> I guess the key size is configured on the Tor node? I haven't found it
> anywhere in the configuration (I'm using TBB on OS X).
>
> Is it possible to increase the size of the key, if say I've got a big
> server running as a node?
>
> If there are nodes using different length keys, is the security relying on
> the node with the smallest key length?
>
> Thanks.
>
> Bernard
>
> ----
> Written on my small electric gadget. Please excuse brevity and (possible)
> misspelling.
>
> Alexandre Guillioud <guillioud.alexandre@xxxxxxxxx> wrote:
>
> >The bigger the key is, the longer (cpu cycle) it take to encrypt/decrypt ?
> >
> >Le jeudi 4 avril 2013, Bernard Tyers a écrit :
> >
> >> Hi,
> >>
> >> Is there a reason 1024 bit keys, instead of something higher is not
> used?
> >> Do higher bit keys affect host performance, or network latency?
> >>
> >>
> >> Thanks,
> >> Bernard
> >>
> >>
> >> ----
> >> Written on my small electric gadget. Please excuse brevity and
> (probable)
> >> misspelling.
> >>
> >> George Torwell <bpmcontrol@xxxxxxxxx <javascript:;>> wrote:
> >>
> >> a second guess would be going after 1024 bit keys.
> >> there is also a video on youtube from a recent con about the
> feasibility of
> >> factoring them, <"fast hacks" or something like that> at the end, jacob
> >> applebaum asks about it and they advise him to use longer keys or
> elliptic
> >> curves crypto.
> >>
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