From: praxeology_guy <praxeology_guy@protonmail.com>
Cc: bitcoin-dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: Re: [bitcoin-dev] BIP proposal: Inhibiting a covert attack on the Bitcoin POW function
Date: Thu, 06 Apr 2017 03:47:04 -0400 [thread overview]
Message-ID: <hGMlexjBJD3vlKg-_mmzAc6Qrth3zfL0hd5hfKllNHkgr4FQzXnuawXizgCFu-5d_cBs6zxwI4LxNNr-nMaZYl1gFzU8XU3sW2TwRQF1PdU=@protonmail.com> (raw)
In-Reply-To: <MWHPR18MB13594C8DE78A393E089660AECD0D0@MWHPR18MB1359.namprd18.prod.outlook.com>
[-- Attachment #1: Type: text/plain, Size: 911 bytes --]
If this is the underlying reason why SegWit is being delayed... that is pretty deplorable.
Probably too late now for bitcoin, but maybe it would be good to pre-mix the block header bits around before it even enters the SHA256 hash. Not sure if best to use a hardcoded map, or to make the map with the tx merkle root as a seed. Depends on how hard it is to find good nonce (etc) bit location collisions.
Maybe gmaxwell's solution is good enough for this particular problem... but the above recommendation might help improve bitcoin's available remaining puzzle difficulty.
Another thing that could be done is increase the number of times SHA256 is performed... but now we are really talking about altering the PoW algorithm. Correct me if I'm wrong: The more number of times its performed, the less any patent-able pre or post calculation skipping/caching have an effect on efficiency.
Cheers,
Praxeology Guy
[-- Attachment #2: Type: text/html, Size: 1062 bytes --]
next prev parent reply other threads:[~2017-04-06 7:47 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-06 4:49 [bitcoin-dev] BIP proposal: Inhibiting a covert attack on the Bitcoin POW function Raystonn .
2017-04-06 7:47 ` praxeology_guy [this message]
2017-04-06 12:13 ` David Vorick
-- strict thread matches above, loose matches on Subject: below --
2017-04-07 1:34 Daniele Pinna
2017-04-07 6:46 ` Emilian Ursu
2017-04-07 7:44 ` Alex Mizrahi
2017-04-07 8:08 ` praxeology_guy
2017-04-06 4:47 Oliver Petruzel
2017-04-05 21:37 Gregory Maxwell
2017-04-05 23:05 ` theymos
2017-04-06 0:17 ` Gregory Maxwell
2017-04-06 0:39 ` Joseph Poon
2017-04-06 0:40 ` Joseph Poon
2017-04-06 1:32 ` Gregory Maxwell
2017-04-06 2:09 ` Joseph Poon
2017-04-05 23:25 ` Anthony Towns
2017-04-05 23:42 ` Joseph Poon
2017-04-06 2:10 ` Jonathan Toomim
2017-04-06 20:21 ` Jared Lee Richardson
2017-04-06 2:31 ` Peter Todd
2017-04-06 2:39 ` Bram Cohen
2017-04-06 2:49 ` Peter Todd
2017-04-06 3:11 ` Erik Aronesty
2017-04-06 3:23 ` Peter Todd
2017-04-06 3:23 ` David Vorick
2017-04-06 3:42 ` Peter Todd
2017-04-06 5:46 ` Thomas Daede
2017-04-06 6:24 ` Jonathan Toomim
2017-04-06 12:04 ` David Vorick
[not found] ` <CAMZUoK=oDAD9nhFAHkgncWtYxjBNh3qXbUffOH57QMnqjhmN6g@mail.gmail.com>
[not found] ` <CAMZUoKn8tr3LGbks0TnaCx9NTP6MZUzQ8PE6jDq1xiqpYyYwow@mail.gmail.com>
2017-04-06 13:55 ` Russell O'Connor
2017-04-06 16:49 ` Marco
2017-04-06 17:04 ` Alex Mizrahi
2017-04-06 17:13 ` Alex Mizrahi
2017-04-07 12:59 ` Jannes Faber
2017-04-07 13:28 ` Erik Aronesty
2017-04-06 17:31 ` Jared Lee Richardson
2017-04-06 17:26 ` Jared Lee Richardson
2017-04-06 15:36 ` Alex Mizrahi
2017-04-06 17:51 ` Jorge Timón
2017-04-06 7:24 ` bfd
2017-04-06 9:17 ` Luke Dashjr
2017-04-06 12:02 ` Luv Khemani
2017-04-06 12:11 ` Bryan Bishop
2017-04-06 17:43 ` Timo Hanke
2017-04-06 12:30 ` Luv Khemani
2017-04-06 15:15 ` Jorge Timón
2017-04-06 15:41 ` Daniel Robinson
2017-04-06 16:13 ` Andreas Schildbach
2017-04-06 21:38 ` Gregory Maxwell
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='hGMlexjBJD3vlKg-_mmzAc6Qrth3zfL0hd5hfKllNHkgr4FQzXnuawXizgCFu-5d_cBs6zxwI4LxNNr-nMaZYl1gFzU8XU3sW2TwRQF1PdU=@protonmail.com' \
--to=praxeology_guy@protonmail.com \
--cc=bitcoin-dev@lists.linuxfoundation.org \
/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