[messaging] Asynchronous Ratcheting Tree

[Jeff Burdges]

On Tue, 2018-01-16 at 15:12 +0000, Ximin Luo wrote:
> I'd guess (contrary to Jeff) that a 3-party DH (e.g. Joux's
> pairing-based scheme) would probably improve the matter - you could
> probably support non-cooperative (asynchronous) merges of a 3-fork as
> long as they all belong in different subtrees. I haven't done the
> calculation for this yet though.

I agree:  You can merge so long as you occupy a different branch from
all other changes not in your past.  Joux's 3-way DH scheme ensures has
people occupy different branches more frequently. 

I think merge issues do still damage the device subtree idea though, but
not sure anything can improve that.

Jeff

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