From: Adam Back <adam@cypherspace•org>
To: Peter Todd <pete@petertodd•org>
Cc: Bitcoin-Dev <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] blind symmetric commitment for stronger byzantine voting resilience (Re: bitcoin taint & unilateral revocability)
Date: Wed, 15 May 2013 13:49:56 +0200 [thread overview]
Message-ID: <20130515114956.GA5863@netbook.cypherspace.org> (raw)
In-Reply-To: <20130515111906.GA26020@savin>
On Wed, May 15, 2013 at 07:19:06AM -0400, Peter Todd wrote:
>Protocols aren't set in stone - any attacker that controls enough
>hashing power to pose a 51% attack can simply demand that you use a
>Bitcoin client modified [to facilitate evaluation of his policy]
Protocol voting is a vote per user policy preference, not a CPU vote, which
is the point. Current bitcoin protocol is vulnerable to hard to prove
arbitrary policies being imposable by a quorum of > 50% miners. The blind
commitment proposal fixes that, so even an 99% quorum cant easily impose
policies, which leaves the weaker protocol vote attack as the remaining
avenue of attack. That is a significant qualitative improvement.
The feasibility of protocol voting attacks is an open question, but you
might want to consider the seeming unstoppability of p2p protocols for a
hint.
Adam
next prev parent reply other threads:[~2013-05-15 11:50 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-05-14 11:51 [Bitcoin-development] ecash and revocability Adam Back
2013-05-14 14:09 ` [Bitcoin-development] bitcoin taint & unilateral revocability (Re: ecash and revocability) Adam Back
2013-05-14 14:27 ` Simon Barber
2013-05-14 17:30 ` grarpamp
2013-05-15 10:25 ` [Bitcoin-development] blind symmetric commitment for stronger byzantine voting resilience (Re: bitcoin taint & unilateral revocability) Adam Back
2013-05-15 11:19 ` Peter Todd
2013-05-15 11:49 ` Adam Back [this message]
2013-05-15 12:40 ` Caleb James DeLisle
2013-05-15 16:21 ` Adam Back
2013-05-15 18:01 ` Caleb James DeLisle
2013-05-15 23:40 ` Adam Back
2013-05-16 1:24 ` Gavin
2013-05-16 1:39 ` Gregory Maxwell
2013-05-16 2:22 ` Mike Hearn
2013-05-16 2:45 ` Gregory Maxwell
2013-05-16 5:52 ` Caleb James DeLisle
2013-05-16 11:32 ` Adam Back
2013-05-16 14:51 ` Adam Back
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