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daniele quercia. U C L. I finished my PhD @. U niversity C ollege L ondon. <My Research>. Ratings on. Ratings on phones. Why ratings on mobiles?. Daniele Quercia. Situation : People exchange. digital content. People. The problem is. drowning user (content overload). help!.
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daniele quercia UCL
University College London
Daniele Quercia Situation: People exchange digital content
drowning user (content overload) help! who will come to the rescue?
Proposal: Accept content only from reputable people
Store Use
MobiRate Store Use [Ubicomp08]
LDTP MobiRate Store Use [Ubicomp08] [ICDM07]
2. Gossip(to check each credential) 1.Log(credentials)
2. Gossip(to check each credential) 1.Log(credentials) Impractical
1.Sealed Log(of credentials) 2. Gossip(to check seals only)
1.Sealed Log(of credentials) 2. Gossip(to check seals only) Practical
1.Sealed Log(of credentials) entry (rating) “seal” (for the entry)
1.Sealed Log(of credentials) entry (rating) “seal” (for the entry) “hash chain” binding whole table
Assumption ID is a unique public key
witnesses [slow down]
What witnesses do Audit! [slow down]
What witnesses do Audit! Why? [slow down]
Who are my witnesses Those who will share content with me
. Who are my witnesses Like-minded familiar strangers
1.Sealed Log(of credentials) 2. Gossip(to check seals only) Practical
Mobility Traces AND Social Networks Reality Mining
Does MobiRate work? <1> Is it robust to malicious individuals? <2> Does it run on phones?
<1> robust The f factor
Oracle MobiRate
“longest” protocol completed in 2.5ms(if Bluetooth 100kb/s)
MobiRate works robust runs on phones
MobiRate Store Use [Ubicomp08]
LDTP MobiRate Store Use [Ubicomp08] [ICDM07]