From: Pieter Wuille <pieter.wuille@gmail•com>
To: Johnson Lau <jl2012@xbt•hk>
Cc: bitcoin-dev <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Should Graftroot be optional?
Date: Thu, 31 May 2018 17:25:04 -0700 [thread overview]
Message-ID: <CAPg+sBgEUV5KNFi1L4MhR-3KAX9gbQKdzWneaEzF+QsKSXYu8A@mail.gmail.com> (raw)
In-Reply-To: <D996F4E8-ACC6-4A49-B841-0F3285344DF6@xbt.hk>
On Fri, May 25, 2018 at 3:14 AM, Johnson Lau <jl2012@xbt•hk> wrote:
> A graftroot design like this is a strict subset of existing signature checking rules. If this is dangerous, the existing signature checking rules must be dangerous.
While you may be right in this situation, I'm not sure that conclusion
follows from your argument. Whether or not a construction is safe does
not just depend on the consensus rules, but also on how it is used.
Otherwise you could as well argue that since OP_TRUE is possible right
now which is obviously insecure, nothing more dangerous can be
accomplished through any soft fork.
The best argument for why Graftroot does not need to be optional I
think was how Greg put it: "since the signer(s) could have signed an
arbitrary transaction instead, being able to delegate is strictly less
powerful.".
Cheers,
--
Pieter
next prev parent reply other threads:[~2018-06-01 0:25 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-22 18:17 Pieter Wuille
2018-05-23 6:15 ` ZmnSCPxj
2018-05-23 13:50 ` Andrew Poelstra
2018-05-23 17:52 ` Andrew Poelstra
2018-05-25 9:46 ` Johnson Lau
2018-05-23 22:06 ` Natanael
2018-05-23 23:45 ` Gregory Maxwell
2018-05-24 9:32 ` Natanael
2018-05-24 1:58 ` Pieter Wuille
2018-05-24 2:08 ` Gregory Maxwell
2018-05-24 9:44 ` Natanael
2018-05-24 12:39 ` Andrew Poelstra
2018-05-25 10:14 ` Johnson Lau
2018-06-01 0:25 ` Pieter Wuille [this message]
2018-06-06 12:48 ` Tim Ruffing
2018-06-06 17:04 ` Pieter Wuille
2018-06-06 21:25 ` Tim Ruffing
2018-06-20 12:12 ` ZmnSCPxj
2018-06-20 14:30 ` Gregory Maxwell
2018-06-21 7:09 ` ZmnSCPxj
2018-06-27 7:29 ` Anthony Towns
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=CAPg+sBgEUV5KNFi1L4MhR-3KAX9gbQKdzWneaEzF+QsKSXYu8A@mail.gmail.com \
--to=pieter.wuille@gmail$(echo .)com \
--cc=bitcoin-dev@lists$(echo .)linuxfoundation.org \
--cc=jl2012@xbt$(echo .)hk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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