From: Ruben Somsen <rsomsen@gmail•com>
To: vjudeu@gazeta•pl
Cc: Bitcoin Protocol Discussion <bitcoin-dev@lists•linuxfoundation.org>
Subject: Re: [bitcoin-dev] Sum of the keys attack on taproot
Date: Sat, 15 May 2021 22:35:37 +0200 [thread overview]
Message-ID: <CAPv7TjZpTGxqQKd6qUDLC_Sqffdf6947k5GVHk+JL4bDOPwXDw@mail.gmail.com> (raw)
In-Reply-To: <13a8be987fc22ecc6284de4b84ef5310f2cd420c.camel@timruffing.de>
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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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prev parent reply other threads:[~2021-05-15 20:35 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-15 10:21 vjudeu
2021-05-15 20:25 ` Tim Ruffing
2021-05-15 20:35 ` Ruben Somsen [this message]
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