Message-ID: <55D4124B.6070700@riseup.net>
Date: Tue, 18 Aug 2015 22:21:15 -0700
From: odinn <odinn.cyberguerrilla@riseup.net>
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To: Chris Pacia <ctpacia@gmail.com>, Peter Todd <pete@petertodd.org>
References: <6EC9DDF352DC4838AE9B088AB372428A25E1F42A@DS04>	<20150817212912.GA15817@muck>
	<CAB+qUq79BgiTGFS1yLxxogg8907jCUtNDmBhnikLWc1fqofNyg@mail.gmail.com>
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Cc: bitcoin-dev@lists.linuxfoundation.org
Subject: Re: [bitcoin-dev] Incentives to run full nodes
Precedence: list

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Potentially relevant...

"Incentivizing the running of full nodes"

https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2014-June/006028
.html

(However, the issue to which I referred here is now closed)

View whole thread:

https://lists.linuxfoundation.org/pipermail/bitcoin-dev/2014-June/thread
.html#6028

On 08/17/2015 02:44 PM, Chris Pacia via bitcoin-dev wrote:
> 
> On Aug 17, 2015 5:29 PM, "Peter Todd via bitcoin-dev" 
> <bitcoin-dev@lists.linuxfoundation.org 
> <mailto:bitcoin-dev@lists.linuxfoundation.org>> wrote: From the
> point of view of a
>> wallet, it's not very secure to use Hearn-style SPV mode, and
>> volunteers running full nodes doesn't help things. Sybil
>> attacking the IP address space is pretty easy in comparison to
>> aquiring hashing power sufficient to create false confirmations,
>> so any attacker able to do the former will likely be running the
>> full node you're connecting too anyway. Ultimately, Hearn-style
>> SPV is a close approximation to just trusting anyone with a
>> non-trivial amount of hashing power. (and getting that is 
>> surprisingly easy, e.g. w/ SPV mining)
> 
> Can you explain how the spv node fails against an attacker with a 
> non-trivial amount of hash power where a full node doesn't? To
> attack an spv wallet that is waiting for 6 or 10 confirmations, you
> would not only need to Sybil them but also summon a massive amount
> of hashing power to create a chain of headers (while forgoing the
> opportunity to mine valid blocks with that hash power).
> 
> But could someone with that much hash power not Sybil a full node
> and give them a chain for valid blocks (but on an orphan fork)? The
> failure model doesn't seem specific to spv to me.
> 
> 
> 
> _______________________________________________ bitcoin-dev mailing
> list bitcoin-dev@lists.linuxfoundation.org 
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
> 

- -- 
http://abis.io ~
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