What Tim said is right. To add to that, you may also wish to read about MuSig: https://blockstream.com/2018/01/23/en-musig-key-aggregation-schnorr-signatures/
Cheers, Ruben On Sat, May 15, 2021 at 10:32 PM Tim Ruffing via bitcoin-dev < bitcoin-dev@lists.linuxfoundation.org> wrote: > On Sat, 2021-05-15 at 12:21 +0200, vjudeu via bitcoin-dev wrote: > > > > All that is needed is producing a signature matching the sum of the > > public keys used in taproot, which is "(a+b-a)*G", > > This is simply not true. > > Taproot does not enable this, or any other form of "cross-input > aggregation", i.e., spending multiple UTXOs with a single signature. > > > Tim > > _______________________________________________ > bitcoin-dev mailing list > bitcoin-dev@lists.linuxfoundation.org > https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev >
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