From: Jonas Nick <jonasdnick@gmail•com>
To: Michael Folkson <michaelfolkson@protonmail•com>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] BIP draft: Half-Aggregation of BIP-340 Signatures
Date: Sun, 17 Jul 2022 20:48:11 +0000 [thread overview]
Message-ID: <2f511890-23a7-882a-332c-85cda02fba7a@gmail.com> (raw)
In-Reply-To: <uxodWlVSmJqvVHDuGevdDbsc5lXiyV6zONlNJtj6gDylkTXQzkPPokLXKJAVULMwPbduJJ7Fb-s0ZYKpduvIZ-LkCsfXClkDH5WhOFsTHts=@protonmail.com>
To be clear, whether "half aggregation needs a new output type or not" does not
become clear in the draft BIP because it is out of scope. Half-aggregation has a
few possible applications. The draft only specifies the cryptographic scheme.
The StackExchange post you link to argues that CISA requires a new output type.
The same argument applies to half aggregating signatures across transaction
inputs (CISHA, if you will). The only difference to "full aggregation" is that
the transaction signature is a single half-aggregate signature instead of a
64-byte signature. You're right that it's possible to do batch verification of
Taproot output key spends (Schnorr signatures) and script spends (key tweaks).
next prev parent reply other threads:[~2022-07-17 20:45 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-08 15:53 Jonas Nick
2022-07-17 13:26 ` Michael Folkson
2022-07-17 20:48 ` Jonas Nick [this message]
2022-07-20 11:16 ` Michael Folkson
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