From: Peter Todd <pete@petertodd.org>
To: Rusty Russell <rusty@rustcorp.com.au>,
Rusty Russell via bitcoin-dev
<bitcoin-dev@lists.linuxfoundation.org>,
Gavin Andresen <gavinandresen@gmail.com>,
Anthony Towns <aj@erisian.com.au>
Cc: Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] Time to worry about 80-bit collision attacks or not?
Date: Mon, 11 Jan 2016 06:57:42 +0000 [thread overview]
Message-ID: <60A90647-86FC-49F5-9FB0-0CAA6A040A4B@petertodd.org> (raw)
In-Reply-To: <87fuy4hip0.fsf@rustcorp.com.au>
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA512
On 10 January 2016 22:57:15 GMT-05:00, Rusty
>Cheers,
>Rusty.
>[1] Weirdly, the bitcoin network is doing this much work every 57
> days, for about $92M. If that's all the attack costs, it's under
> 1M in 10 years.
Don't get too caught up in Moore's law here - more likely the attack will become feasible because SHA2 is partially weakened, as happened with SHA1. Having industry standard safety margins would make such a weakening be an academic problem rather than an emergency.
-----BEGIN PGP SIGNATURE-----
iQE9BAEBCgAnIBxQZXRlciBUb2RkIDxwZXRlQHBldGVydG9kZC5vcmc+BQJWk1Jc
AAoJEMCF8hzn9Lncz4MH/RYReh4+oPkt8D4uW2FhiB/BlzY5Q1FP94nyi/jQAAh9
er3cUA47RhSLLd2ukC2XDgbw8CZzhnzECs7vBVsXacc3dGpzV59n8L/pnX47IRJh
i1BPWHzEl/UeE/uBYUVgmy+kCVkJ80gnL2GGgZ3IXL5P+CHYY9dvhBrr53Q3HSpi
aEXVivBvBnX0GeATMVY5TAiailUfsUbUmPdEHu0x5hqqTh0sUpi+R+wXWJfPESB2
hzMVZd8ALz1SJhDqbkmBNHy2CX0fhGlnMSapm6EkQksfshkcwJ7tj8s2CEOYD68T
4mR7Xh+FsOA2bbZP8M/lMd3rrXbwFzXi0rWPa70mxqI=
=2W58
-----END PGP SIGNATURE-----
next prev parent reply other threads:[~2016-01-11 6:58 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-07 19:02 [bitcoin-dev] Time to worry about 80-bit collision attacks or not? Gavin Andresen
2016-01-07 19:13 ` Matt Corallo
2016-01-07 19:19 ` Adam Back
2016-01-07 20:56 ` Dave Scotese
2016-01-07 21:06 ` Gavin Andresen
2016-01-07 22:56 ` Ethan Heilman
2016-01-07 23:39 ` Gavin Andresen
2016-01-08 1:26 ` Matt Corallo
2016-01-08 1:54 ` Gavin Andresen
2016-01-08 17:38 ` Pieter Wuille
2016-01-08 18:41 ` Peter Todd
2016-01-07 20:40 ` Ethan Heilman
2016-01-07 23:52 ` Pieter Wuille
2016-01-08 1:00 ` Gavin Andresen
2016-01-08 1:27 ` Watson Ladd
2016-01-08 3:30 ` Rusty Russell
2016-01-08 3:41 ` Matt Corallo
2016-01-08 12:02 ` Rusty Russell
2016-01-08 12:38 ` Gavin Andresen
2016-01-08 14:34 ` Watson Ladd
2016-01-08 15:26 ` Adam Back
2016-01-08 15:33 ` Anthony Towns
2016-01-08 15:46 ` Gavin Andresen
2016-01-08 15:50 ` Gavin Andresen
2016-01-08 15:59 ` Gavin Andresen
2016-01-11 20:32 ` Jorge Timón
2016-01-08 16:06 ` Gavin Andresen
2016-01-11 3:57 ` Rusty Russell
2016-01-11 6:57 ` Peter Todd [this message]
2016-01-11 23:57 ` Tier Nolan
2016-01-12 0:00 ` Tier Nolan
2016-01-12 12:08 ` Gavin Andresen
2016-01-12 23:22 ` Zooko Wilcox-O'Hearn
2016-01-08 18:52 ` Peter Todd
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=60A90647-86FC-49F5-9FB0-0CAA6A040A4B@petertodd.org \
--to=pete@petertodd.org \
--cc=aj@erisian.com.au \
--cc=bitcoin-dev@lists.linuxfoundation.org \
--cc=gavinandresen@gmail.com \
--cc=rusty@rustcorp.com.au \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox