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Sex and Drugs and Rock ‘n Roll or privacy in online social networks

Sex and Drugs and Rock ‘n Roll or privacy in online social networks. Jon Crowcroft, University of Cambridge Jon.Crowcroft@cl.cam.ac.uk http://www.cl.cam.ac.uk/~jac22. Dunbar’s Number & Trust. Dunbar’s number usually cited as 150 Size of simple communities of humans

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Sex and Drugs and Rock ‘n Roll or privacy in online social networks

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  1. Sex and Drugs and Rock ‘n Roll orprivacy in online social networks Jon Crowcroft, University of Cambridge Jon.Crowcroft@cl.cam.ac.uk http://www.cl.cam.ac.uk/~jac22 NGN 2008

  2. Dunbar’s Number & Trust • Dunbar’s number usually cited as 150 • Size of simple communities of humans • Reflects ability to cope with group • Humans gossip rather than physical grooming • Language lets us abstract • We can reason up to 5 levels of intentionality • (Shakespear does 6 :-) • T = 1 / [3.x^N] • T is trust metric • 3.x is a number between 3 and 4 • N is distance in social net NGN 2008

  3. Why? • N = 0 = Kin (sex) • N = 1 = friends (beer/drugs) • N = 2 or more = acquaintances (dancing/music/laughing at same jokes) • How does this help in facebook? NGN 2008

  4. Social Networks Project • We’re looking at co-lo networks • c.f. haggle, cityware - bluetooth etc • AND online social networks • Friendship graph on orkut,li,facebook • AND communication networks • Email address book, sms, phonecalls • Can use to infer real realationship • I.e. type of edge in graph (and value of N) NGN 2008

  5. Trust • Trust in terms of revelation/disclosure • Or carrying data (in ferry net) • Or simple grouping for ACLs • Need to do some experiments • Figure out how ties are broken • Forgetting • How new tools/technology affect • Size and dynamics of social net… NGN 2008

  6. Questions? • What net/edge type is more likely to cause an edge in another net? • Does meeting someone domiante over online or vice versa - • I.e. how does new tech affect x (size of immediate gang) and • N (scope of gang/level of intentionality reasoning?)? • Can you use this to detect dodgy behaviour? • Has anyone got an mp3 of the blockheads on their phone or laptop? NGN 2008

  7. Byee NGN 2008

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