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From: Dustin Dettmer <dustinpaystaxes@gmail.com>
To: Bitcoin Protocol Discussion
	<bitcoin-dev@lists.linuxfoundation.org>,
	 ZmnSCPxj <ZmnSCPxj@protonmail.com>
Subject: Re: [bitcoin-dev] Proof-of-Stake Bitcoin Sidechains
Date: Tue, 22 Jan 2019 08:33:23 -0800	[thread overview]
Message-ID: <CABLeJxRmdccf2tVZ4MsdsEj6H9+NnOpp+AeMLZwYh-zTMkWJXw@mail.gmail.com> (raw)
In-Reply-To: <wTXHV7W_AXHz5xdhXJVJr2OdSpEOaFh0PBQubFdZv4JyF6SlImszj2QyF9G-_Dem06A3iBWLF3vdgiHC_NlsVqy7DFX5XTphajNnMqiU6r0=@protonmail.com>

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Wouldn’t a revealed private key for time locked funds create a race to
spend? I imagine miners who are paying attention would have the advantage
but it would still just be a race.

Would be nice to have the funds destroyed or sent somewhere specific. Like
if somehow the revealed key was actually itself a presigned transaction. Or
perhaps a 32 byte piece of a tx needed to complete it.

On Tue, Jan 22, 2019 at 6:14 AM ZmnSCPxj via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:

> Good Morning Matt,
>
> > ### ZmnSCPxj,
> >
> > I'm intrigued by this mechanism of using fixed R values to prevent
> multiple signatures, but how do we derive the R values in a way where they
> are
> unique for each blockheight but still can be used to create signatures or
> verify?
>
> One possibility is to derive `R` using standard hierarchical derivation.
> Then require that the staking pubkey be revealed to the sidechain network
> as actually being `staking_pubkey = P + hash(P || parent_R) * G` (possibly
> with some trivial protection against Taproot).
> To sign for a blockheight `h`, you must use your public key `P` and the
> specific `R` we get from hierarchical derivation from `parent_R` and the
> blockheight as index.
>
>
>
> Regards,
> ZmnSCPxj
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>

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  parent reply	other threads:[~2019-01-22 16:33 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-01-18 22:59 [bitcoin-dev] Proof-of-Stake Bitcoin Sidechains Matt Bell
2019-01-19  1:42 ` ZmnSCPxj
2019-01-19  5:35   ` Matt Bell
2019-01-20  2:06     ` ZmnSCPxj
2019-01-21 18:47       ` Matt Bell
2019-01-22  9:19         ` ZmnSCPxj
2019-01-22 14:58           ` Satoshin
2019-01-22 20:03             ` Dustin Dettmer
2019-01-22 16:33           ` Dustin Dettmer [this message]
2019-01-24 10:03             ` ZmnSCPxj
2019-01-24 18:46               ` Matt Bell
2019-01-25  0:16               ` Peter Todd
2019-01-25  5:33                 ` ZmnSCPxj
2019-01-22 20:22           ` Dr Adam Back
2019-02-01  9:19 ` ZmnSCPxj

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