[Asrg] A paper/project worth considering (found it!)

[Rich Kulawiec <rsk at gsp.org>]

	Credence
	http://www.cs.cornell.edu/People/egs/credence/

Quoting:

	Much of the content in peer-to-peer filesharing networks is
	corrupt, damaged, or mislabeled. Such polluted content makes
	it difficult for correctly functioning peers to locate desired
	content, decreasing the overall usefulness of the network.

	Credence is a practical distributed reputation system, designed
	to counteract content pollution in peer-to-peer filesharing
	systems. Credence enables a peer to determine the authenticity of
	online content; that is, how accurate the purported description
	of the object matches the object itself. Participants in the
	Credence network vote on objects; Credence collates these votes,
	and weights them by a novel similarity measure which weighs highly
	votes from like-minded peers while discounting the votes from
	peers engaged in vote-spamming. This novel voter correlation
	scheme provides an incentive for peers to vote honestly and
	mitigates the impact of dishonest peers.

	We have implemented Credence on top of the LimeWire client for
	the Gnutella network. Our client provides a peer-based judgement
	that a given object will possess the properties with which it
	is labeled and enables users to evaluate search results for
	authenticity before downloading.

	Many peer-to-peer reputation schemes have been proposed in
	academia. Credence is the first practical implementation of a
	peer-to-peer reputation scheme. As future systems become more
	connected and endpoints become more reliant on content provided
	by other nodes, reputation systems like Credence can play an
	important role in assessing the validity of remote content.


Consider the possible applicability of this to "systems observed to be
emitting SMTP traffic" where human "voters" are replaced by spamtraps
and similar.

I'm not claiming that this is "the answer" by any means.  I do think
it's an interesting approach to a similar problem.

---Rsk
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