From: James MacWhyte <macwhyte@gmail.com>
To: Johnson Lau <jl2012@xbt.hk>,
Bitcoin Protocol Discussion
<bitcoin-dev@lists.linuxfoundation.org>,
Matthew Roberts <matthew@roberts.pm>
Subject: Re: [bitcoin-dev] BIP: OP_PRANDOM
Date: Fri, 20 May 2016 14:30:52 +0000 [thread overview]
Message-ID: <CAH+Axy5G9j-0TXE6dCQ69pH=TKPDtFibfCf_tZ87o88FVd0pxw@mail.gmail.com> (raw)
In-Reply-To: <CBBB62CD-2E30-4C9F-962E-3F340B29EDA7@xbt.hk>
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Matthew,
Other than gambling, do you have any specific examples of how this could be
useful?
On Fri, May 20, 2016, 20:34 Johnson Lau via bitcoin-dev <
bitcoin-dev@lists.linuxfoundation.org> wrote:
> Using the hash of multiple blocks does not make it any safer. The miner of
> the last block always determines the results, by knowing the hashes of all
> previous blocks.
>
>
> == Security
>
> Pay-to-script-hash can be used to protect the details of contracts that
> use OP_PRANDOM from the prying eyes of miners. However, since there is also
> a non-zero risk that a participant in a contract may attempt to bribe a
> miner the inclusion of multiple block hashes as a source of randomness is a
> must. Every miner would effectively need to be bribed to ensure control
> over the results of the random numbers, which is already very unlikely. The
> risk approaches zero as N goes up.
>
>
> _______________________________________________
> bitcoin-dev mailing list
> bitcoin-dev@lists.linuxfoundation.org
> https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev
>
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next prev parent reply other threads:[~2016-05-20 14:31 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-20 10:57 [bitcoin-dev] BIP: OP_PRANDOM Matthew Roberts
2016-05-20 11:34 ` Johnson Lau
2016-05-20 14:30 ` James MacWhyte [this message]
2016-05-20 15:05 ` Matthew Roberts
2016-05-20 18:32 ` Eric Martindale
2016-05-22 13:30 ` Jeremy
2016-05-24 14:30 ` Sergio Demian Lerner
2016-05-24 14:36 ` Sergio Demian Lerner
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