From: Melvin Carvalho <melvincarvalho@gmail•com>
To: kjj <bitcoin-devel@jerviss•org>
Cc: Bitcoin Dev <Bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] we can all relax now
Date: Wed, 6 Nov 2013 19:17:46 +0100 [thread overview]
Message-ID: <CAKaEYhLpr24+7B0w410S7XdGgyOU4vsv07uv2e6yvYNKV8ZQJQ@mail.gmail.com> (raw)
In-Reply-To: <5279D49D.5050807@jerviss.org>
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On 6 November 2013 06:33, kjj <bitcoin-devel@jerviss•org> wrote:
> One of the things that really gets me going is when someone devises a
> model, tests it against itself, and then pretends that they've learned
> something about the real world.
>
> Naturally, the Selfish Mining paper is exactly this sort of nonsense.
> Their model is one with no latency, and one where the attacker has total
> visibility across the network. An iterated FSM is not a suitable
> simulation of the bitcoin system. The bitcoin network does not have
> states, and to the extent that you can pretend that we do, you can't
> simulate transitions between them with static probabilities.
>
> The authors understand this deep down inside, even though they didn't
> work out the implications. They handwave the issue by assuming a total
> sybil attack, and in true academic spirit, they don't realize that the
> condition necessary for the attack is far, far worse than the attack
> itself.
>
> Greg said he'd like to run some simulations, and I'm thinking about it
> too. Unfortunately, he is busy all week, and I'm lazy (and also busy
> for most of tomorrow).
>
> If neither of us get to it first, I'm willing to pitch in 1 BTC as a
> bounty for building a general bitcoin network simulator framework. The
> simulator should be able to account for latency between nodes, and
> ideally within a node. It needs to be able to simulate an attacker that
> owns varying fractions of the network, and make decisions based only on
> what the attacker actually knows. It needs to be able to simulate this
> "attack" and should be generic enough to be easily modified for other
> crazy schemes.
>
> (Bounty offer is serious, but expires in one year [based on the earliest
> timestamp that my mail server puts on this email], and /may/ be subject
> to change if the price on any reputable exchange breaks 1000 USD per BTC
> in that period.)
>
> Basically, the lack of a decent network simulator is what allowed this
> paper to get press. If the author had been able to see the importance
> of the stuff he was ignoring, we wouldn't be wasting so much time
> correcting him (and sadly the reporters that have no way to check his
> claims).
>
> https://bitcointalk.org/index.php?topic=324413.msg3495663#msg3495663
>
Thanks for posting this bounty. I'm interested in working on it, and will
give it a try. I also have some other commitments, so I suspect you guys
will finish it first tho... but if not, I'll post details of the simulator.
>
>
>
>
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next prev parent reply other threads:[~2013-11-06 18:17 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-06 5:33 kjj
2013-11-06 9:26 ` Frank F
2013-11-06 11:35 ` Jeff Garzik
2013-11-06 18:06 ` Christophe Biocca
2013-11-07 3:44 ` Peter Todd
2013-11-07 4:15 ` Kyle Jerviss
2013-11-07 4:33 ` Peter Todd
2013-11-07 4:59 ` Kyle Jerviss
2013-11-07 13:09 ` Peter Todd
2013-11-07 4:56 ` Gavin Andresen
2013-11-07 13:24 ` Peter Todd
2013-11-07 16:14 ` Mike Hearn
2013-11-07 18:28 ` Daniel Lidstrom
2013-11-08 19:49 ` Andreas M. Antonopoulos
2013-11-08 20:33 ` Gregory Maxwell
2013-11-15 10:58 ` Peter Todd
2013-11-07 8:07 ` Jannes Faber
2013-11-07 5:24 ` Kyle Jerviss
2013-11-06 18:17 ` Melvin Carvalho [this message]
2013-11-06 22:19 ` Jouke Hofman
2014-05-10 11:05 ` E willbefull
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