[bitcoindev] BIP draft: Full-Aggregation of BIP 340 Signatures

["'Fabian' via Bitcoin Development Mailing List" <bitcoindev@googlegroups.com>]

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Hi list,

I would like to share a BIP draft for full-aggregation of BIP 340
signatures, a standard for the DahLIAS interactive aggregate signature
scheme by Jonas Nick, Tim Ruffing, and Yannick Seurin:
https://eprint.iacr.org/2025/692

Full-aggregation allows a group of signers to produce a single 64-byte
signature for a list of public key and message pairs in a two-round
signing protocol very similar to MuSig2/BIP327. The primary application
in Bitcoin would be CISA (cross-input signature aggregation).

The BIP draft text can be found here:
https://github.com/fjahr/bips/blob/4b34e86d0040edad6cba3f7518b33472a11ebeaf/bip-XXXX.mediawiki

For inline comments, I have opened a mock pull request on my BIPs repo fork:
https://github.com/fjahr/bips/pull/4

Feedback of any kind is much appreciated.

Best,
Fabian

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