This looks fantastic -- thanks.
On Wed, May 28, 2008 at 7:06 PM, Luca de Alfaro <luca(a)soe.ucsc.edu> wrote:
we have three new techreps available:
Robust Content-Driven Reputation shows that the content-driven reputation we
proposed in a WWW 2007 paper can be made robust to Sybil ("sock-puppet") and
other coordinated attacks. In WWW 2007, we proposed "content-driven
reputation" for Wikipedia authors, where authors gain reputation if their
contributions are preserved, and lose reputation if their contributions are
quickly undone. The original algorithms were very prone to attacks; we show
here that they can be made resistant.
Assigning Trust to Wikipedia Content proposes computing the trust of
Wikipedia text on the basis of the reputation of the author, and the
reputation of the people who revised the text. We display text trust by
coloring text background. Many of you have seen the on-line demo for the
English Wikipedia, at http://trust.cse.ucsc.edu/
. This is an improved
version of a November 2007 techrep on the same topic. In this improved
techrep, we show how the trust system can be made resistant to attacks.
Measuring Author Contributions to the Wikipedia defines and compares various
ways for measuring the contribution of individual authors to the Wikipedia.
We have our own favorite; read more to find out :-)
In these months, we have been busy working at WikiTrust, an open-source tool
for assigning reputation to wiki authors and trust to wiki content. We
already have a batch (or "off-line") system, which can compute reputation
and trust based on wiki dumps, such as the Wikipedia dumps made available by
the Wikimedia Foundation. We are developing an "on-line" system, which can
assign reputation and trust in real-time, as edits are made. One of our
chief concerns in developing an on-line system was to ensure that it was
robust to attack, and we believe we have made progress in this direction, as
reported in the above techreps. We are now proceeding with the
implementation; my guess is that we will have a prototype in a month or so.
By the way, the "batch" part of WikiTrust can be easily adapted to carry
out various analysis tasks. Basically, it walks over all revisions of every
page of a wiki, and it contains an efficient text analysis engine that tells
you precisely how text was changed between versions. So, it is easy to use
WikiTrust as a platform to write analysis algorithms for wikis: you don't
have to worry about the boring tasks of reading and parsing markup language,
and computing text diffs in a reasonable way; you can concentrate on the
details of the specific analysis you want to do. It is all open source, and
we welcome developers or people interested in it.
All the best,
Luca (with Ian, Bo, and the other wikitrusters).
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