From: Steve Davis <steven.charles.davis@gmail•com>
To: Pieter Wuille <pieter.wuille@gmail•com>
Cc: Bitcoin Dev <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] SHA1 collisions make Git vulnerable to attakcs by third-parties, not just repo maintainers
Date: Sun, 26 Feb 2017 10:53:29 -0600 [thread overview]
Message-ID: <D7E6E9C1-54D9-4BF8-B0DA-0C26C14EB9E5@gmail.com> (raw)
In-Reply-To: <CAPg+sBirowtHqUT5GUJf9hmDEACKVX19HAon-rrz7GmO8OBsNg@mail.gmail.com>
> On Feb 26, 2017, at 1:36 AM, Pieter Wuille <pieter.wuille@gmail•com> wrote:
>
> Typical hash function breaks produce collision attacks, while a preimage attack is needed to reduce single-key address security.
Thank you Pieter - that was really helpful. I realize now that I was thinking of a preimage attack but had mistakenly assumed that the birthday bound applied...
So the unit operation: [genkeypair; ripemd160(sha256(pubkey));check_utxoset] would need to be performed 2.9*10^42 and not (as I had first calculated) 2.4*10^18.
Oops. My bad.
next prev parent reply other threads:[~2017-02-26 16:53 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 ` 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
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 [this message]
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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