Trust Metrics

A trust metric is a measure of how a member of a group is trusted by the other members.

Since the definition of trust and reputation, as well as of trust metrics and reputation systems is partially interchangeable, see also our entry on Reputation where we discuss reputation systems.

The Wikipedia article on trust metrics notes that such systems must exhibit "Attack resistance, i.e. the ability to handle agents who participate in bad faith (i.e. who aim to abuse the presumption of trust).

=Examples

• eBay's Feedback Rating at http://pages.ebay.com/help/feedback/evaluating-feedback.html

• The Slashdot introduced karma system, at http://slashdot.org/moderation.shtml

• The free software Advogato, at http://www.advogato.org/

• The Center for Adventure Economics at Couchsurfing is working on trust metrics, see

http://wiki.couchsurfing.com/en/Trust

=More Information

See our entries on Trust and Reputation

Trust Metrics Wiki is a Wiki whose goal is to review, understand, code and compare on same data all the trust metrics proposed so far.

External links

Provided by the Wikipedia article at http://en.wikipedia.org/wiki/Trust_metric

• Trust Metrics Evaluation Project of Paolo Massa. The Analyzed Trust Metrics page provides an extensive bibliography of work on the theory and implementation of trust metrics.
• Trustcomp.org is an online community of more than 150 academic and industrial members who research computational trust management and online reputation. There is also a mailing list.
• Raph Levien, 2000. Advogato's trust metric. Electronic manuscript.
• Raph Levien, 2002. Attack Resistant Trust Metric Metadata HOWTO. Electronic manuscript.