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Optimized ecmul on secp256k1 #30

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k06a opened this issue Aug 7, 2018 · 1 comment
Open

Optimized ecmul on secp256k1 #30

k06a opened this issue Aug 7, 2018 · 1 comment

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@k06a
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k06a commented Aug 7, 2018

Recently Vitalik Buterin proposed to abuse ecrecover to compute hashed result of ecmul:
https://ethresear.ch/t/you-can-kinda-abuse-ecrecover-to-do-ecmul-in-secp256k1-today/2384

I had implemented his idea: https://github.com/1Address/ecsol/blob/master/contracts/EC.sol

It uses about 32K gas to call ecmulVerify.
@barryWhiteHat
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I think this cannot be used for snark verification as you need to do pairing additons and multiplications which i don't think is possible with secp256k1

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@k06a @barryWhiteHat