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From: Peter Todd <pete@petertodd.org>
To: Steve Davis <steven.charles.davis@gmail.com>
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] SHA1 collisions make Git vulnerable to attakcs by third-parties, not just repo maintainers
Date: Sat, 25 Feb 2017 16:40:18 -0500	[thread overview]
Message-ID: <20170225214018.GA16524@savin.petertodd.org> (raw)
In-Reply-To: <4FE38F6A-0560-4989-9C53-7F8C94EA4C76@gmail.com>

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On Sat, Feb 25, 2017 at 03:34:33PM -0600, Steve Davis wrote:
> Yea, well. I don’t think it is ethical to post instructions without an associated remediation (BIP) if you don’t see the potential attack.

I can't agree with you at all there: we're still at the point where the
computational costs of such attacks limit their real-world impact, which is
exactly when you want the *maximum* exposure to what they are and what the
risks are, so that people develop mitigations.

Keeping details secret tends to keep the attacks out of public view, which
might be a good trade-off in a situation where the attacks are immediately
practical and the need to deploy a fix is well understood. But we're in the
exact opposite situation.

> I was rather hoping that we could have a fuller discussion of what the best practical response would be to such an issue?

Deploying segwit's 256-bit digests is a response that's already fully coded and
ready to deploy, with the one exception of a new address format. That address
format is being actively worked on, and could be deployed relatively quickly if
needed.

-- 
https://petertodd.org 'peter'[:-1]@petertodd.org

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  reply	other threads:[~2017-02-25 21:40 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <mailman.22137.1487974823.31141.bitcoin-dev@lists.linuxfoundation.org>
2017-02-24 23:49 ` [bitcoin-dev] SHA1 collisions make Git vulnerable to attakcs by third-parties, not just repo maintainers Steve Davis
2017-02-25  1:01   ` Peter Todd
2017-02-25 12:04     ` Steve Davis
2017-02-25 14:50       ` Leandro Coutinho
2017-02-25 16:10         ` Ethan Heilman
2017-02-25 17:45           ` Shin'ichiro Matsuo
2017-02-27  9:15             ` Henning Kopp
2017-02-25 18:19           ` Alice Wonder
2017-02-25 18:36             ` Ethan Heilman
2017-02-25 19:12           ` Peter Todd
2017-02-25 20:42             ` Watson Ladd
2017-02-25 20:57               ` Peter Todd
2017-02-25 20:53             ` Russell O'Connor
2017-02-25 21:04               ` Peter Todd
2017-02-25 21:21                 ` Dave Scotese
2017-02-25 21:34                   ` Steve Davis
2017-02-25 21:40                     ` Peter Todd [this message]
2017-02-25 21:54                       ` Steve Davis
2017-02-25 22:14                         ` Pieter Wuille
2017-02-25 22:34                           ` Ethan Heilman
2017-02-26  6:26                           ` Steve Davis
2017-02-26  6:36                             ` Pieter Wuille
2017-02-26  7:16                               ` Steve Davis
     [not found]                                 ` <CAPg+sBirowtHqUT5GUJf9hmDEACKVX19HAon-rrz7GmO8OBsNg@mail.gmail.com>
2017-02-26 16:53                                   ` Steve Davis
2017-02-25 23:09                       ` Leandro Coutinho
2017-02-23 18:14 Peter Todd
2017-02-23 21:28 ` Peter Todd
2017-02-23 23:57   ` Aymeric Vitte
2017-02-24 10:04     ` Tim Ruffing
2017-02-24 15:18       ` Aymeric Vitte
2017-02-24 16:30         ` Tim Ruffing
2017-02-24 17:29           ` Aymeric Vitte

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