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Date: Wed, 22 May 2013 10:20:22 -0400
Message-ID: <CA+8xBpc4deHT7uY+N+yx_qOEvLV3T2G7aXqHtq=nRPGd6=2O=g@mail.gmail.com>
From: Jeff Garzik <jgarzik@exmulti.com>
To: Melvin Carvalho <melvincarvalho@gmail.com>
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Cc: Bitcoin Dev <bitcoin-development@lists.sourceforge.net>
Subject: Re: [Bitcoin-development] UUID to identify chains (payment protocol
 and elsewhere)
Precedence: list

On Wed, May 22, 2013 at 10:12 AM, Melvin Carvalho
<melvincarvalho@gmail.com> wrote:
> On 22 May 2013 16:07, Jeff Garzik <jgarzik@exmulti.com> wrote:
>>
>> On Wed, May 22, 2013 at 6:27 AM, Melvin Carvalho
>> <melvincarvalho@gmail.com> wrote:
>> > Some out of band algo/hash could work so long as there was a one to one
>> > relationship between the described object and the UUID.  In this case
>> > the
>> > gensis block may not uniquely identify a coin.
>>
>> What does this mean?  It seems extremely unlikely that two different
>> genesis blocks will have the same hash.
>
>
> Two coin ecosystems could have the same genesis block

That has really, really bad side effects.  The whole point of the
bitcoin consensus algorithm is to avoid situations like this.

We don't want to encourage that behavior with code.

-- 
Jeff Garzik
exMULTI, Inc.
jgarzik@exmulti.com