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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
May 23, 2006 IRW2006 Edinburgh, Scotland 2
Identity
on the Web
May 23, 2006 IRW2006 Edinburgh, Scotland 3
Personal Identity
on the Web
May 23, 2006 IRW2006 Edinburgh, Scotland 4
Personal Identity
• Account– Blog– Email– Community sites
• Flickr• Orkut
May 23, 2006 IRW2006 Edinburgh, Scotland 5
One URI per one thing
May 23, 2006 IRW2006 Edinburgh, Scotland 6
One identity per one person
May 23, 2006 IRW2006 Edinburgh, Scotland 7
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
May 23, 2006 IRW2006 Edinburgh, Scotland 8
Reason of multiple identities
• People want to know one subjectnot whole people
People don’t need unique identity
May 23, 2006 IRW2006 Edinburgh, Scotland 9
What is the problem?
May 23, 2006 IRW2006 Edinburgh, Scotland 10
Identity crisis
*Sorry, I lost the sources of images
May 23, 2006 IRW2006 Edinburgh, Scotland 11
To solve personal identity crisis
Objective
May 23, 2006 IRW2006 Edinburgh, Scotland 12
What is the important thingto analyze identity?
May 23, 2006 IRW2006 Edinburgh, Scotland 13
Link
From: http://www.xarxanet.org/xarxanet/novetatsDetall.xarxanet? xnt_locale=ca&xnt_portal=1&nov_novetatId=26947Page Rank
May 23, 2006 IRW2006 Edinburgh, Scotland 14
For the personal identity
May 23, 2006 IRW2006 Edinburgh, Scotland 15
Links
In conflict
Father Master
May 23, 2006 IRW2006 Edinburgh, Scotland 16
Trust
• Meta-link to make links• Can be propagated
Trust Trust
Trust
May 23, 2006 IRW2006 Edinburgh, Scotland 17
Trust
• Meta-link to make links• Can be propagated
Love Love
Love
Trust
May 23, 2006 IRW2006 Edinburgh, Scotland 18
Give a better model of trustamong the people
Method
May 23, 2006 IRW2006 Edinburgh, Scotland 19
Trust model of FOAF
Trust Level 1
Trust Level 2
May 23, 2006 IRW2006 Edinburgh, Scotland 20
Rated relationship model
Trust Value: 0.9 * 0.4 = 0.36Trust Level: 2
May 23, 2006 IRW2006 Edinburgh, Scotland 21
FilmTrust (related research)
FilmTrust: http://trust.mindswap.org/FilmTrust
May 23, 2006 IRW2006 Edinburgh, Scotland 22
Complex situation
May 23, 2006 IRW2006 Edinburgh, Scotland 23
Layered model
May 23, 2006 IRW2006 Edinburgh, Scotland 24
Person don’t need to make multiple identities
May 23, 2006 IRW2006 Edinburgh, Scotland 25
Layered model
May 23, 2006 IRW2006 Edinburgh, Scotland 26
Person need to keep one identity
May 23, 2006 IRW2006 Edinburgh, Scotland 27
Benefits
• Solve identity crisis by unique identity
• Improve propagation of information• Massage filtering and ordering
May 23, 2006 IRW2006 Edinburgh, Scotland 28
FOAFRealm
• Single-sign-on system• Based on FOAF and RDF storage• P2P/HyperCuP infrastructure• Semantic Social Collaborative
Filtering
May 23, 2006 IRW2006 Edinburgh, Scotland 29
Bended model
May 23, 2006 IRW2006 Edinburgh, Scotland 30
Multiple dimension
May 23, 2006 IRW2006 Edinburgh, Scotland 31
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
May 23, 2006 IRW2006 Edinburgh, Scotland 33
Backup slides
May 23, 2006 IRW2006 Edinburgh, Scotland 34
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
May 23, 2006 IRW2006 Edinburgh, Scotland 35
My identities on web
Privacy data and life log
For writing
For friends
For research
May 23, 2006 IRW2006 Edinburgh, Scotland 36
Free to make a new identity
May 23, 2006 IRW2006 Edinburgh, Scotland 37
Cannot be blocked
