From: Anthony Towns <aj@erisian•com.au>
To: Russell O'Connor <roconnor@blockstream•io>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Schnorr signatures BIP
Date: Mon, 6 Aug 2018 18:39:25 +1000 [thread overview]
Message-ID: <20180806083925.kg5px476bzhec44b@erisian.com.au> (raw)
In-Reply-To: <CAMZUoKm_ij4Ffzx5Wpipa5RAFA=5F06jhiTCMJhp3vAj1q+2jA@mail.gmail.com>
On Sun, Aug 05, 2018 at 10:33:52AM -0400, Russell O'Connor via bitcoin-dev wrote:
> In light of this, I revise my proposed change to make the verification
> equation
>
> R + sG + eP = 0.
Isn't the verification equation "R + s(-G) + eP = 0" equally good, then,
since -G is a constant? (ie, at worst it's a matter of optimising the
verifier for -G as well as G)
If not, what's the actual performance impact of having to negate "s"
as part of batch verifying ~10000 signatures? It seems like it should
be trivially small to me? (scalar_negate benchmarks at 0.00359us, while
ecdsa_verify benchmarks at 66us, which I believe then reduces by a factor
of ~3 for batches of 10k schnorr sigs?)
FWIW, I'm a fan of the formulation "s = r + H(R,P,m)p" mostly because
it seems like the simplest possible way of describing the setup, and I'm
all for optimising for people being able to understand what's going on.
Cheers,
aj
next prev parent reply other threads:[~2018-08-06 8:39 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-07-06 18:08 Pieter Wuille
2018-07-06 21:05 ` Russell O'Connor
2018-07-06 22:00 ` Gregory Maxwell
2018-07-06 22:01 ` Gregory Maxwell
2018-07-08 14:36 ` Russell O'Connor
2018-07-14 15:42 ` Sjors Provoost
2018-07-14 21:20 ` Pieter Wuille
2018-08-04 12:22 ` Russell O'Connor
2018-08-05 14:33 ` Russell O'Connor
2018-08-06 8:39 ` Anthony Towns [this message]
2018-08-06 14:00 ` Russell O'Connor
2018-08-06 21:12 ` Tim Ruffing
2018-08-12 16:37 ` Andrew Poelstra
2018-08-29 12:09 ` Erik Aronesty
2018-09-03 0:05 ` Andrew Poelstra
2018-09-05 12:26 ` Erik Aronesty
2018-09-05 13:05 ` Andrew Poelstra
2018-09-05 13:14 ` Erik Aronesty
2018-09-05 15:35 ` Gregory Maxwell
2018-09-11 16:34 ` Erik Aronesty
2018-09-11 17:00 ` Gregory Maxwell
2018-09-11 17:20 ` Erik Aronesty
2018-09-11 17:27 ` Gregory Maxwell
2018-09-11 17:37 ` Erik Aronesty
2018-09-11 17:51 ` Gregory Maxwell
2018-09-11 18:30 ` Erik Aronesty
2018-09-13 18:46 ` Andrew Poelstra
2018-09-13 20:20 ` Erik Aronesty
2018-09-14 14:38 ` Andrew Poelstra
2018-09-20 21:12 ` Russell O'Connor
2018-07-07 2:47 Артём Литвинович
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=20180806083925.kg5px476bzhec44b@erisian.com.au \
--to=aj@erisian$(echo .)com.au \
--cc=bitcoin-dev@lists$(echo .)linuxfoundation.org \
--cc=roconnor@blockstream$(echo .)io \
/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