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Subject: Re: [bitcoin-dev] BIP for Legacy Sign Verify functions
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On Thursday 21 December 2017 10:26:25 PM Dan Bryant via bitcoin-dev wrote:
> https://github.com/brianddk/bips/blob/legacysignverify/bip-0xyz.mediawiki
It's not even correct... Your first "verify message" step is not possible; you
can't get a public key from an address.
What is actually done, is using the signature + message to perform key
recovery, to extract the public key of the signer, and then hashing that and
comparing it to the address provided.
> Although this is a well established functionality, it has never been
> published in a BIP. My proposal is simply to provide a reference point for
> future expansion of these capabilities into new address schemes.
New schemes should probably NOT be based on the current one.
Luke
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