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From: Gregory Maxwell <greg@xiph.org>
To: Bitcoin Dev <bitcoin-dev@lists.linuxfoundation.org>
Subject: [bitcoin-dev] Fwd: The first successful Zero-Knowledge Contingent Payment
Date: Fri, 26 Feb 2016 23:23:09 +0000	[thread overview]
Message-ID: <CAAS2fgTLE6SH1wa_0orfuYoPeu5pasumbTW446KAyGwDaGEcHA@mail.gmail.com> (raw)
In-Reply-To: <CAAS2fgT8RE7w87Yv9Be7arH-xGCtwcq0Ynbk21ZVpqJZrEN5EQ@mail.gmail.com>

On Fri, Feb 26, 2016 at 11:06 PM, Sergio Demian Lerner
<sergio.d.lerner@gmail.com> wrote:
> Congratulations!
>
> It a property of the SKCP system that the person who performed the trusted
> setup cannot extract any information from a proof?
>
> In other words, is it proven hard to obtain information from a proof by the
> buyer?

Yes, the secrecy is information theoretic (assuming no implementation
bugs); beyond the truth of the outcome. This holds even if the
initialization is malicious.

The soundness of this scheme is computational-- we're trusting a deep
stack of cryptographic assumptions that the proofs cannot be forged.


  parent reply	other threads:[~2016-02-26 23:23 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-26 21:42 [bitcoin-dev] The first successful Zero-Knowledge Contingent Payment Gregory Maxwell
2016-02-26 23:06 ` Sergio Demian Lerner
     [not found]   ` <CAAS2fgT8RE7w87Yv9Be7arH-xGCtwcq0Ynbk21ZVpqJZrEN5EQ@mail.gmail.com>
2016-02-26 23:23     ` Gregory Maxwell [this message]
2016-02-26 23:33   ` Tier Nolan
2016-02-26 23:45     ` Gregory Maxwell
2016-02-26 23:56       ` Tier Nolan

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