📅 Original date posted:2019-01-22
📝 Original message:This could could be a viable option. I think this is the right approach.
Any downside to this and how much does this add to the blockweight if anything at all.
Anonymouse
> On Jan 22, 2019, at 4:19 AM, ZmnSCPxj via bitcoin-dev <bitcoin-dev at 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 at lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
Satoshin [ARCHIVE] /
npub1t8…8yvcq
2023-06-07 20:15:59
in reply to nevent1q…yasd
Author Public Key
npub1t8mtmcsvng40065nhp3d2e43esyr3wryrw3m4zqrwev0e0fzdyuq38yvcqPublished at
2023-06-07 20:15:59Event JSON
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"content": "📅 Original date posted:2019-01-22\n📝 Original message:This could could be a viable option. I think this is the right approach.\n\nAny downside to this and how much does this add to the blockweight if anything at all.\n\nAnonymouse\n\n\u003e On Jan 22, 2019, at 4:19 AM, ZmnSCPxj via bitcoin-dev \u003cbitcoin-dev at lists.linuxfoundation.org\u003e wrote:\n\u003e \n\u003e Good Morning Matt,\n\u003e \n\u003e\u003e ### ZmnSCPxj,\n\u003e\u003e \n\u003e\u003e 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\n\u003e unique for each blockheight but still can be used to create signatures or verify?\n\u003e \n\u003e One possibility is to derive `R` using standard hierarchical derivation.\n\u003e 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).\n\u003e 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.\n\u003e \n\u003e \n\u003e \n\u003e Regards,\n\u003e ZmnSCPxj\n\u003e _______________________________________________\n\u003e bitcoin-dev mailing list\n\u003e bitcoin-dev at lists.linuxfoundation.org\n\u003e https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev",
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