dhruv/BIPoverhaul.mediawiki

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Last active February 28, 2023 19:50

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BIPoverhaul.mediawiki

Please see latest draft and conversation in the bips repository PR #1378

ChristopherA commented Feb 28, 2023

Is there any reference code (or other library?) for your x-only ECDH secret derivation? There are several places with Gordian Envelope, in particular for pairing between a coordinator or watchtower and holders of bitcoin keys where we'd like to encrypt the PSBTs. This would enhance the security of our current UR PSBT approach that a dozen wallet vendors support that can optionally be transported with animated QRs.

sipa commented Feb 28, 2023 •

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@ChristopherA It's all in the BIP: https://github.com/bitcoin/bips/blob/master/bip-0324.mediawiki#user-content-ElligatorSwift_encoding_of_curve_X_coordinates and https://github.com/bitcoin/bips/blob/master/bip-0324.mediawiki#test-vectors

real-or-random commented Feb 28, 2023

Yes, see

https://bip324.com/sections/code-review/ may also be helpful to navigate the jungle of the PRs.

Be aware that our key exchange encodes the EC points contributed from both sides using Elligator Swift.

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