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From: Pieter Wuille <pieter.wuille@gmail.com>
To: Eric Voskuil <eric@voskuil.org>
Cc: Bitcoin Protocol Discussion
	<bitcoin-dev@lists.linuxfoundation.org>,
	Libbitcoin Development <libbitcoin@lists.dyne.org>
Subject: Re: [bitcoin-dev] Unique node identifiers
Date: Wed, 8 Mar 2017 17:55:32 -0800	[thread overview]
Message-ID: <CAPg+sBg-ihLOi4eq6mCti=bGtbe0sWYv3ScmWoEZ8d=dHDQ5Mw@mail.gmail.com> (raw)
In-Reply-To: <6a5a6a8f-d689-260a-76a9-a91f6bda56c5@voskuil.org>

On Wed, Mar 8, 2017 at 5:16 PM, Eric Voskuil <eric@voskuil.org> wrote:
> On 03/08/2017 03:12 PM, Pieter Wuille wrote:
>> In that way, I see BIP150 as an extension of IP addresses, except more
>> secure against network-level attackers. If you believe the concept of
>> people establishing links along existing trust lines is a problem, you
>> should be arguing against features in Bitcoin software that allows
>> configuring preferred IP addresses to connect to as well (-addnode and
>> -connect in Bitcoin Core, for example).
>
> Weak identity is insufficient to produce the problem scenario that is at
> the heart of my concern (excluding people). It is this "[same] except
> more secure" distinction that is the problem. You brush past that as if
> it did not exist.

So you're saying that a -onlyacceptconnectionsfrom=IP option wouldn't
be a concern to you because it can't exclude people? Of course it can
exclude people - just not your ISP or a state-level attacker.

Please, Eric. I think I understand your concern, but this argument
isn't constructive either.

The proposal here is to introduce visible node identities on the
network. I think that's misguided as node count is irrelevant and
trivial to fake anyway. But you bringing up BIP150 here isn't useful
either. I know that you equate the concept of having verifiable
identity keys in the P2P with a step towards making every node
identifiable, but they are not the same. It's just a cryptographic
tool to keep a certain class of attackers from bypassing restrictions
that people can already make.

-- 
Pieter


  parent reply	other threads:[~2017-03-09  1:55 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-03-04 16:04 [bitcoin-dev] Unique node identifiers John Hardy
2017-03-05  6:29 ` Marcel Jamin
2017-03-05 12:55   ` John Hardy
2017-03-05 13:27 ` Btc Drak
2017-03-05 13:57   ` John Hardy
2017-03-07 18:44     ` Eric Voskuil
2017-03-08  2:01       ` bfd
2017-03-08 19:47       ` Jonas Schnelli
2017-03-08 21:09         ` Eric Voskuil
2017-03-08 21:20           ` Jonas Schnelli
2017-03-08 23:12             ` Pieter Wuille
     [not found]               ` <6a5a6a8f-d689-260a-76a9-a91f6bda56c5@voskuil.org>
2017-03-09  1:55                 ` Pieter Wuille [this message]
2017-03-09 11:01                   ` Aymeric Vitte
2017-03-09  1:08             ` Eric Voskuil
2017-03-08 21:25         ` [bitcoin-dev] Unique node identifiers (and BIP150) Tom Zander
2017-03-08 21:31           ` Jonas Schnelli
     [not found] <7c5020dd-5259-9954-7bf1-06fa98124f8f@voskuil.org>
2017-03-22  0:04 ` [bitcoin-dev] Unique node identifiers Eric Voskuil

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