public inbox for bitcoindev@googlegroups.com
 help / color / mirror / Atom feed
From: Chris Priest <cp368202@ohiou.edu>
To: jl2012 <jl2012@xbt.hk>
Cc: bitcoin-dev@lists.linuxfoundation.org
Subject: Re: [bitcoin-dev] We need to fix the block withholding attack
Date: Sat, 19 Dec 2015 19:47:12 -0800	[thread overview]
Message-ID: <CAAcC9ys_t7X0WpQ8W3577M8GLiA5sPV2F1BJ9qZbnMkE-1j3+Q@mail.gmail.com> (raw)
In-Reply-To: <219f125cee6ca68fd27016642e38fdf1@xbt.hk>

On 12/19/15, jl2012 <jl2012@xbt.hk> wrote:
> Chris Priest via bitcoin-dev 於 2015-12-19 22:34 寫到:
>> Block witholding attacks are only possible if you have a majority of
>> hashpower. If you only have 20% hashpower, you can't do this attack.
>> Currently, this attack is only a theoretical attack, as the ones with
>> all the hashpower today are not engaging in this behavior. Even if
>> someone who had a lot of hashpower decided to pull off this attack,
>> they wouldn't be able to disrupt much. Once that time comes, then I
>> think this problem should be solved, until then it should be a low
>> priority. There are more important things to work on in the meantime.
>>
>
> This is not true. For a pool with 5% total hash rate, an attacker only
> needs 0.5% of hash rate to sabotage 10% of their income. It's already
> enough to kill the pool
>
>

This begs the question: If this is such a devastating attack, then why
hasn't this attack brought down every pool in existence? As far as I'm
aware, there are many pools in operation despite this possibility.


  reply	other threads:[~2015-12-20  3:47 UTC|newest]

Thread overview: 47+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-19 18:42 [bitcoin-dev] We need to fix the block withholding attack Peter Todd
2015-12-19 19:30 ` Bob McElrath
2015-12-19 20:03 ` jl2012
2015-12-20  3:34 ` Chris Priest
2015-12-20  3:36   ` Matt Corallo
2015-12-20  3:43     ` Chris Priest
2015-12-20  4:44       ` Peter Todd
2015-12-26  8:12         ` Multipool Admin
2015-12-27  4:10           ` Geir Harald Hansen
2015-12-28 19:12           ` Peter Todd
2015-12-28 19:30             ` Emin Gün Sirer
2015-12-28 19:35               ` Multipool Admin
2015-12-28 19:33             ` Multipool Admin
2015-12-28 20:26             ` Ivan Brightly
2015-12-29 18:59               ` Dave Scotese
2015-12-29 19:08                 ` Jonathan Toomim
2015-12-29 19:25                 ` Allen Piscitello
2015-12-29 21:51                   ` Dave Scotese
2015-12-20  3:40   ` jl2012
2015-12-20  3:47     ` Chris Priest [this message]
2015-12-20  4:24       ` jl2012
2015-12-20  5:12         ` Emin Gün Sirer
2015-12-20  7:39           ` Chris Priest
2015-12-20  7:56             ` Emin Gün Sirer
2015-12-20  8:30               ` Natanael
2015-12-20 11:38           ` Tier Nolan
2015-12-20 12:42             ` Natanael
2015-12-20 15:30               ` Tier Nolan
2015-12-20 13:28           ` Peter Todd
2015-12-20 17:00             ` Emin Gün Sirer
2015-12-21 11:39               ` Jannes Faber
2015-12-25 11:15                 ` Ittay
2015-12-25 12:00                   ` Jonathan Toomim
2015-12-25 12:02                   ` benevolent
2015-12-25 16:11                   ` Jannes Faber
2015-12-26  0:38               ` Geir Harald Hansen
2015-12-28 20:02               ` Peter Todd
2015-12-26  8:23             ` Eric Lombrozo
2015-12-26  8:26               ` Eric Lombrozo
2015-12-26 15:33               ` Jorge Timón
2015-12-26 17:38                 ` Eric Lombrozo
2015-12-26 18:01                   ` Jorge Timón
2015-12-26 16:09               ` Tier Nolan
2015-12-26 18:30                 ` Eric Lombrozo
2015-12-26 19:34                   ` Jorge Timón
2015-12-26 21:22               ` Jonathan Toomim
2015-12-27  4:33                 ` Emin Gün Sirer

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=CAAcC9ys_t7X0WpQ8W3577M8GLiA5sPV2F1BJ9qZbnMkE-1j3+Q@mail.gmail.com \
    --to=cp368202@ohiou.edu \
    --cc=bitcoin-dev@lists.linuxfoundation.org \
    --cc=jl2012@xbt.hk \
    /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