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Date: Tue, 31 Dec 2024 22:38:00 -1000
From: "David A. Harding" <dave@dtrt.org>
To: Tadge Dryja <rx@awsomnet.org>
Cc: Bitcoin Development Mailing List <bitcoindev@googlegroups.com>
Subject: Re: [bitcoindev] Trivial QC signatures with clean upgrade path
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On 2024-12-16 12:20, Tadge Dryja wrote:
> An on-chain proof of quantum computer (PoQC I guess :) ) would be a
> way to reduce the damage of activation forks. One way to build it:
> Create a NUMS point pubkey - something like described in BIP341. Send
> some coins to that address, then watch if it gets spent. [...]
> Nodes can then have code which
> watches for such a proof and changes consensus rules based on it.
I think this could be even more useful if combined with a previous idea
far creating a NUMS[1][3] (or trust minimized[2]) pubkey compatible with
Bitcoin but with a security strength less than 128 bits. That way
someone might claim the bounty of the key with (say) 96 bits security
potentially months or years before QC advances made regular keys
insecure and tempted operators of QCs into stealing from regular user
addresses.
-Dave
[1]
https://gnusha.org/pi/bitcoindev/CAH5Bsr20n2T7KRTYqycSUx0iEuEApC8NGtPCfN8rYhRyHLE4gA@mail.gmail.com/
[2]
https://gnusha.org/pi/bitcoindev/aRiFFJKz5wyHFDi2dXcGbNEHZD2nIwDRk7gaXIte-N1BoOEOQ-ySYRnk0P70S5igANSr2iqF2ZKV1dWvipaQHK4fJSv9A61-uH7w4pzxKRE=@protonmail.com/
[3]
https://gnusha.org/pi/bitcoindev/CAH5Bsr39kw08ki76aezJ1EM9e7mdLFLUmtKwJJNYcyuMpR_Cuw@mail.gmail.com/
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