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From: Luke Dashjr <luke@dashjr.org>
To: bitcoin-dev@lists.linuxfoundation.org, DKBryant@gmail.com
Subject: Re: [bitcoin-dev] BIP for Legacy Sign Verify functions
Date: Thu, 21 Dec 2017 23:09:05 +0000	[thread overview]
Message-ID: <201712212309.07243.luke@dashjr.org> (raw)
In-Reply-To: <CAAUFj100ULfTbEorSK2PF5nvW-R_TCMOiboBBEMj+eS5upgU8Q@mail.gmail.com>

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


  reply	other threads:[~2017-12-21 23:09 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-12-21 22:26 [bitcoin-dev] BIP for Legacy Sign Verify functions Dan Bryant
2017-12-21 23:09 ` Luke Dashjr [this message]
2017-12-21 23:21   ` Dan Bryant
2017-12-22 10:29   ` Aymeric Vitte
2017-12-22 23:06     ` Aymeric Vitte

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