Social Sharing In a Web of Things

Sharing Using Social Networks in a Composable Web of Things Dominique Guinard, Mathias Fischer, Vlad Trifa ETH Zurich and SAP Research Switzerland

[http://www.flickr.com/photos/docman] BACKGROUND What is (our) Web of Things? WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 2

Things? Smart Things! and tagged objects! to sensor networks… From appliances … WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 3

(our) Web of Thing in a Nutshell  Creating a Web of Things by:  Connecting embedded devices to the Internet (IP) [IPv6].  Having them embedding a Web-Server.  Modelling their services in a Resource Oriented manner (RESTful API)  Universal API  Benefits:  Ease the building of applications on top of embedded devices:  Physical Mashups  Get a lot of the features/services of the Web almost for free:  bookmarking, caching, linking, searching, securing etc.  Twitter, Atom, blogs, social networks, visualization APIs, maps, etc. [IPv6] Hui, Jonathan W., and David E. Culler. “IP is dead, long live IP for wireless sensor networks.” In Proceedings of the 6th ACM conference on Embedded network sensor systems, 15-28. Raleigh, NC, USA: ACM, 2008. WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 4

[http://www.flickr.com/photos/moragcasey/] MOTIVATION Do we really need social network based sharing of smart things? WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 5

Sharing? Use-cases please!  Sharing your location with friends trough your phone.  RESTful-droid  Sharing your energy consumption with your family in a Facebook widget.  Energie Visible  Sharing the trace of tagged products with an important client.  RESTful EPCIS WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 6

Sharing is Key!  Web 2.0 mashups depend on open APIs to Web services:  e.g. Google, Twitter, Wordpress, Doodle, etc.  We need more finer access control for physical APIs:  http://.../EnergieVisible/DomsComputer/status  PUT/POST status=off  http://.../DomsMobilePhone/location  GET  There is a need for sharing mechanisms in a WoT. WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 7

[http://www.flickr.com/photos/julianbleecker] SYSTEM ARCHITECTURE A System for Sharing Smart Things on the Web WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 8

Our Contribution: Social Sharing for Smart Things  Basic concept:  Protect things using SSL (HTTPS)  Create an authentication proxy in the cloud, i.e. a scalable Web application.  Sync with social networks (APIs) to get friends, colleagues, relatives you might share with.  Advantages:  Policies already exist thanks to the structure of social networks.  Sharing with real people rather than abstract logins. WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 9

SAC: Social Access Controller  SAC as a proxy between smart things and clients on the Web.  Allows owners to share things with social networks users.  Offers a RESTful API as well:  FAT (Friends and Things) WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 10

1) Sharing with the Social Access Controller 1. Owner provides:  URL to smart thing (or gateway)  Credentials 2. SAC crawls the smart thing:  Thanks to its RESTful API  Using links, caption and OPTION 3. Owner selects Friends to share with:  Using the Social Network API  Select Access Rights (Read, Write) 4. Shared smart thing advertised on Social Network. WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 11

2) Accessing Shared Things  Friend connects to social network using delegated authentication:  OAuth, FacebookConnect  SAC check whether the Friend was granted access rights:  Resource (i.e. URL)  Method (e.g. GET, PUT, etc.)  SAC invokes the service and redirect the results to the user. WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 12

DEMONSTRATION Let’s get concrete: http://tinyurl.com/friendsandthings WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 13

Lessons Learned  Social APIs  Eternal beta?  Open Social:  hi5, LinkedIn, MySpace, Netlog, Ning, orkut, Yahoo!, Google, XING, Friendst er  Not: Facebook, Twitter.  Delegated Authentication:  oAuth, openID  Except for: Facebook, … [shamzu.files.wordpress.com/] WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 14

Thanks for your attention!  Related links: www.webofthings.com http://delicious.com/misterdom/ socialapi  Contact:  Dominique Guinard  www.guinard.org WoT 2010, 29.03.10 D. Guinard, Institute for Pervasive Computing, ETH Zurich & SAP Research 15

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Social Sharing In a Web of Things

by Dominique Guinard

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