From: Pierre-Luc Dallaire-Demers <dallairedemers@gmail•com>
To: Bitcoin Development Mailing List <bitcoindev@googlegroups.com>
Subject: [bitcoindev] Re: Proposing a P2QRH BIP towards a quantum resistant soft fork
Date: Fri, 14 Jun 2024 06:51:07 -0700 (PDT) [thread overview]
Message-ID: <b3561407-483e-46cd-b5e9-d6d48f8dca93n@googlegroups.com> (raw)
In-Reply-To: <62fd28ab-e8b5-4cfc-b5ae-0d5a033af057n@googlegroups.com>
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SQIsign is blockchain friendly but also very new, I would recommend adding
a hash-based backup key in case an attack on SQIsign is found in the future
(recall that SIDH broke over the span of a
weekend https://eprint.iacr.org/2022/975.pdf).
Backup keys can be added in the form of a Merkle tree where one branch
would contain the SQIsign public key and the other the public key of the
recovery hash-based scheme. For most transactions it would only add one bit
to specify the SQIsign branch.
The hash-based method could be Sphincs+, which is standardized by NIST but
requires adding extra code, or Lamport, which is not standardized but can
be verified on-chain with OP-CAT.
On Sunday, June 9, 2024 at 12:07:16 p.m. UTC-4 Hunter Beast wrote:
> The motivation for this BIP is to provide a concrete proposal for adding
> quantum resistance to Bitcoin. We will need to pick a signature algorithm,
> implement it, and have it ready in event of quantum emergency. There will
> be time to adopt it. Importantly, this first step is a more substantive
> answer to those with concerns beyond, "quantum computers may pose a threat,
> but we likely don't have to worry about that for a long time". Bitcoin
> development and activation is slow, so it's important that those with low
> time preference start discussing this as a serious possibility sooner
> rather than later.
>
> This is meant to be the first in a series of BIPs regarding a hypothetical
> "QuBit" soft fork. The BIP is intended to propose concrete solutions, even
> if they're early and incomplete, so that Bitcoin developers are aware of
> the existence of these solutions and their potential.
>
> This is just a rough draft and not the finished BIP. I'd like to validate
> the approach and hear if I should continue working on it, whether serious
> changes are needed, or if this truly isn't a worthwhile endeavor right now.
>
> The BIP can be found here:
> https://github.com/cryptoquick/bips/blob/p2qrh/bip-p2qrh.mediawiki
>
> Thank you for your time.
>
>
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next prev parent reply other threads:[~2024-06-14 14:15 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-06-08 21:04 [bitcoindev] " Hunter Beast
2024-06-14 13:51 ` Pierre-Luc Dallaire-Demers [this message]
2024-06-14 14:28 ` [bitcoindev] " Hunter Beast
2024-06-17 1:07 ` Antoine Riard
2024-06-17 20:27 ` hunter
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