From: Robert Backhaus <robbak@robbak•com>
To: Bitcoin Development <bitcoin-development@lists•sourceforge.net>
Subject: Re: [Bitcoin-development] To prevent arbitrary data storage in txouts — The Ultimate Solution
Date: Wed, 10 Apr 2013 13:52:17 +1000 [thread overview]
Message-ID: <CA+i0-i8M7B6QkTXgNudF5SyK4BKG9rfDp83RSdnm-1GFViBZiQ@mail.gmail.com> (raw)
In-Reply-To: <CAAS2fgSkiqfhJxHJNw8i8G5yd1XY6tUTDynQ+AekbwmHP_jZmw@mail.gmail.com>
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That sounds workable. I take it that the P2SH address is not stored? I like
it that this denies the possibility of storing data in the block chain, but
does not block interesting uses like creating date stamps - You can still
store the 'fake P2SH' value whose checksum is secured by the blockchain.
On 10 April 2013 12:53, Gregory Maxwell <gmaxwell@gmail•com> wrote:
> (1) Define a new address type, P2SH^2 like P2SH but is instead
> H(H(ScriptPubKey)) instead of H(ScriptPubKey). A P2SH^2 address it is
> a hash of a P2SH address.
>
> (2) Make a relay rule so that to relay a P2SH^2 you must include
> along the inner P2SH address. All nodes can trivially verify it by
> hashing it.
>
> (2a) If we find that miners mine P2SH^2 addresses where the P2SH
> wasn't relayed (e.g. they want the fees) we introduce a block
> discouragement rule where a block is discouraged if you receive it
> without receiving the P2SH^2 pre-images for it.
>
> With this minor change there is _no_ non-prunable location for users
> to cram data into except values. (and the inefficiency of cramming
> data into values is a strong deterrent in any case)
>
> The same thing could also be done for OP_RETURN PUSH value outputs
> used to link transactions to data. Make the data be a hash, outside of
> the txn include the preimage of the hash.
>
>
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next prev parent reply other threads:[~2013-04-10 3:52 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-10 2:53 Gregory Maxwell
2013-04-10 3:03 ` Peter Todd
2013-04-10 3:08 ` Peter Todd
2013-04-10 15:58 ` Jorge Timón
2013-04-11 11:27 ` Peter Todd
2013-04-10 6:53 ` Peter Todd
2013-04-10 7:15 ` Gregory Maxwell
2013-04-10 7:29 ` Peter Todd
2013-04-10 3:52 ` Robert Backhaus [this message]
2013-04-10 3:58 ` Gregory Maxwell
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