[tor-relays] AS: "ColoCrossing" - 28 new relays

[David Goulet]

On 12 Dec (09:33:58), Toralf Förster wrote:
> On 12/11/18 10:54 PM, nusenu wrote:
> >  from their fingerprints
> I'm just curious that the fingerprints starts with the same sequence. I was
> under the impression that the fingerprint is somehow unique like a hash?

If one would like to position their relay on the hashring at a specific spot,
you can bruteforce the key generation to match the first bytes of the
fingerprint. Usually 4 or 5 bytes are enough and it doesn't take that long to
compute.

And because the position on the hashring is predictable over time for hidden
service *version 2*, then anyone can setup relays that in 5 days will be at
the right position.

Thus the importance to catch these relays before they get the HSDir flag that
is 96 hours of uptime.

Cheers!
David

-- 
WzhUyhDvWQI2JZglnMWl4fhIHYln5DpMG50IrXaHPLU=
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