From rusty at rustcorp.com.au  Mon Aug 31 02:54:55 2015
From: rusty at rustcorp.com.au (Rusty Russell)
Date: Mon, 31 Aug 2015 12:24:55 +0930
Subject: [Lightning-dev] Negotiating & Committing Signatures
In-Reply-To: <CAD5xwhjD1VO9ue7zRLzk1YQKoOWg=3AMZmdy+1X8=E54hFZrWQ@mail.gmail.com>
References: <CAD5xwhjD1VO9ue7zRLzk1YQKoOWg=3AMZmdy+1X8=E54hFZrWQ@mail.gmail.com>
Message-ID: <87mvx8p3pc.fsf@rustcorp.com.au>

Jeremy Rubin <jr at mit.edu> writes:
> Negotiating & Committing Signatures
> ============================
>
> In this proposal, I suggest the addition of new types of signature schemes
> to Bitcoin, and running lightning over multi signature of the
> variants to utilize the advantages of multiple signature schemes without
> the drawbacks.

Hi Jeremy,

        Such a hybrid would certainly be possible (though getting novel
crypto into bitcoin is a large task).

You refer to an "order or magnitude" increase in pubkey and signature
sizes, but signatures of even 64k wouldn't make much logistical
difference to the LN.  Giant pubkeys might be a logistical issue, though
using the bitcoin trick of referring to them via their RIPEMD160 should
work there, too.

Cheers,
Rusty.