May 23, 2006 IRW2006 Edinburgh, Scotland 1
Trust Models for Community-aware
Identity Management
Choi Hee Chul, Sebastian Ryszard Kruk, Slawomir Grzonkowski, Katarzyna Stankiewicz,
Brain Davis, John G. Breslin
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Identity
on the Web
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Personal Identity
on the Web
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Personal Identity
• Account– Blog– Email– Community sites
• Flickr• Orkut
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One URI per one thing
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One identity per one person
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Reason of multiple identities
• Writers want to use a pen name• People like to grumble on the web• Makes feel free to write
People want to use
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Reason of multiple identities
• People want to know one subjectnot whole people
People don’t need unique identity
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What is the problem?
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Identity crisis
*Sorry, I lost the sources of images
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To solve personal identity crisis
Objective
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What is the important thingto analyze identity?
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Link
From: http://www.xarxanet.org/xarxanet/novetatsDetall.xarxanet? xnt_locale=ca&xnt_portal=1&nov_novetatId=26947Page Rank
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For the personal identity
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Links
In conflict
Father Master
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Trust
• Meta-link to make links• Can be propagated
Trust Trust
Trust
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Trust
• Meta-link to make links• Can be propagated
Love Love
Love
Trust
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Give a better model of trustamong the people
Method
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Trust model of FOAF
Trust Level 1
Trust Level 2
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Rated relationship model
Trust Value: 0.9 * 0.4 = 0.36Trust Level: 2
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FilmTrust (related research)
FilmTrust: http://trust.mindswap.org/FilmTrust
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Complex situation
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Layered model
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Person don’t need to make multiple identities
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Layered model
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Person need to keep one identity
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Benefits
• Solve identity crisis by unique identity
• Improve propagation of information• Massage filtering and ordering
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FOAFRealm
• Single-sign-on system• Based on FOAF and RDF storage• P2P/HyperCuP infrastructure• Semantic Social Collaborative
Filtering
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Bended model
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Multiple dimension
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Future work
• Fast calculation algorithm of delegated trust
without privacy problem• How to figure out the layers?• Find meaning of conjunction
among the several layers
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Thank [email protected]
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Backup slides
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Capturing trust on the web
• Machine-driven approaches– PageRank or eBay reputation system– Calculated as an analogy
• User-driven approaches– PGP, FOAFRealm– Needs efforts of user
• Hybrid approaches
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My identities on web
Privacy data and life log
For writing
For friends
For research
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Free to make a new identity
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Cannot be blocked
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