New Applications for P2P

Transcription

1 New Applications for P2P A Research Agenda Forschungsseminar, KIT, Benjamin Schiller, Thorsten Strufe Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 1

2 Peer-to-Peer Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 2

3 The Peer-to-Peer Problem Now where was that resource that I need? Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 3

4 P2P in a Nutshell Propertiesof (pure) P2P: All peersareequal no dedicated service, no central entity no a-priori knowledge/ structure/ hierarchy highly dynamic behavior of nodes Flat system architecture, flat namespace, unreliable service providers Main primary problems of P2P: Staying connected Resource lookup(name resolution, location of replica, especially selecting a good next hop for the delegation routing) Standard Solutions(p2p the executive summary) Connectivity: select enough fall-back servers Name resolution: unstructured P2P (flooding) or external search engine Resource location: registry and lookup in structured P2P (DHT!) Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 4

5 Peer-to-Peer(a Definition) Communication model: asynchronous(request-response) Rolemodel:a singlerole(?) symmetricbehavior, all peersin general(can) do thesame BUT: consideringan interactionthereisonerequestingand nrespondingpeers. Organisational model: completely unstructured( it s a mess! ) Otherthanbootstrappingno knowledgewhatsoeveraboutthecontext, no knowledge about the structure No Identifiers, only names all thisin order to do: File sharing, contentdistribution(bittorrent), sessioninitiation/chat/voip(skype, jabber), malware distribution/spam(botnets), Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 5

6 Our first claim: Peer-to-Peeriswell understoodand there s nothing fundamentally new to learn Butthen: aren t there more interesting things to do, with all the resources!? Can we leverage properties of this paradigm for other applications? Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 6

7 Some New Challenges Live multimedia streaming Anonymous communications Resistant communication infrastructures Distributing services Social networking services P2P-based Social IPTV Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 7

8 Social IPTV? Social TV Concept Advanced TV service efficiently integrating the legacy IPTV service and web-based social service including personal/group broadcasting, game, advertisement, shopping, telemedicine, etc. Participation & Sharing Experience, History, Relationship, Behavior, Habit, Social Network Service Social Media Social Game Social Ad Social Shopping Social Learning Advanced TV Service to Create a New Business Model using SNS-based Participation, Relationship, and Personalization over IPTV Infrastructure Social TV Digital TV PC IPTV Set-top Box IPTV Contents & Services Mobile Device Game Console Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 8

9 Collaborative IPTV with OSN Integration Friends watching this channel: chat chat Integration with Online Social Networks chat chat sandrestina Live Streaming of Users, Discussions Discussion Videos: Similar Channels: Support of ad-hoc collaborative applications Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 9

10 Social IPTV Content Providers Collab. viewing overlays, Service overlays media streams meta information mashups uploading content meta information additional services Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 10

11 Social IPTV Testbed in Darmstadt Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 11

12 Social IPTV Testbed in Darmstadt Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 12

13 Summarizing P2P Social IPTV Leverage the P2P paradigm for multiple new applications ALM / live streaming(decrease load of infrastructure) Collaborative interaction(the teleconf scenario ) Creating, deploying, running apps (P2P service distribution) A casefor Resistant/ resilient networking(commercialization) Privacy protection(direct identification of participants) Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 13

14 Decentralized Social Networking Services Simplified, walled-garden version of the Web : Easy to set-up pages ( profiles ) of individuals( and companies ) Links reflecting real-world relations between individuals Possibility to share user generated content including messaging Guest book / Wall (asynchronous broadcast) (asynchronous unicast) Chat (~ synchronous unicast) Collaborative applications / games Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 14

15 Target Audience / Application Domain Public and professional OSN (business-oriented) Private and personal OSN Special Purpose OSN Publish-Subscribe Posting ( Micro blogging ): Twitter Planning Business Trips: Dopplr, TripIT Location based achievement systems: foursquare, gowalla Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 15

16 Why Bother? Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 16

17 Generalized Architectural Model of SNS Distributed Environment Main SNS centralized Additional 3rd party application servers Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 17

18 Quest to Decentralize Issues of centralized architectures Centralized control Centralized data storage Full, centralized access to data Single Point of failure Taking back the web Breaking out of the walled gardens (again, cf. AOL) Re-democratizing the web Distribute the services! Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 18

19 Quest to Decentralize Issues of centralized architectures Centralized control Centralized data storage Full, centralized access to data Single Point of failure Taking back the web Breaking out of the walled gardens (again, cf. AOL) Re-democratizing the web Distribute the services! Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 19

20 Plethora P2P / Decentralized Social Services FOSS BuddyPress, CrabGrass, Cobs, DaisyChain, Diki, Elgg, FETHR, GNUNet, Gossple, Jappix, Lorea, Mycella, Movim, PeerScape, Pinax, StatusNet Commercial Approaches diaspora, wuala, LifeSocial Academia Friend-of-a-Friend, FriendStore, HelloWorld, LifeSocial, LotusNet(Likir), PeerSon, Safebook, SocialCircle, Tribler, Vis-a-Vis Focus on systems that implement social networking and publication functions Provide running software or a comprehensive protocol / system description Actually are decentralized Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 20

21 Selected Systems and Proposals diaspora Friend-of-a-Friend LifeSocial LotusNet/ Likir PeerSon Safebook Vis-A-Vis Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 21

22 Classifying Decentralized OSN Type of storage / service provision Infrastructure-based Dedicated Web-Servers Deployed in the cloud Peer-to-Peer-based Hybrid Granularity of service provision Replicating whole service Distributed storage of attributes Level of integration Stand alone system Extension of existing systems Resource sharing incentives None Social cooperation Payed premium services Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 22

23 Approach Type of Service Service Granulariy Integration Incentives diaspora web-based complete external Premium FoaF web-based complete external vis-à-vis Cloud complete external LotusNet P2P split stand alone PeerSon P2P split external Safebook P2P complete stand alone Social Coop LifeSocial hybrid split stand alone Premium Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 23

24 Our current approach : Privacy-Preserving Online Social Networking L. A. Cutillo, R. Molva, T. Strufe...and plenty of students :-) Partially funded by EU SOCIALNETS Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 24

25 Architecture 3 Trusted ID System ID Management 1 Matryoshka Data storage Cooperation Communication with privacy 2 Peer-to-peer substrate Lookup Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 25

26 Network view a Social network overlay b Trusted ID user id Peer to peer node id Internet ip address a Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 26

27 User i s Matryoshka Outer shell k e a Trust relationship for i c s friend Entry nodes Inner shell i c d j i s node l f b d friend of c c friend of i d friend of i Trust relationship for c User i s friends End to end privacy based on hop -Store by hop i s encrypted trust profile data Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 27

28 Finding it, using P2P: alooks for b a a b s profile req. DHT e hash(b s attribute) e d d c b s outer shell nodes b s profile c b k f b s outer shell: h(b), e h(b), f lookup alooks for b s entry nodes kprovides b s outer shell nodes data request asends profile data request to a b s entry node Data reply One of b s inner shell nodes answers Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 28

29 Summary P2P itself is boring UsingP2P fornewapplicationsisnot;-) Some of our current activities include Live multimedia streaming Anonymous communications Resistant communication infrastructures Distributing services Social networking services Which we integrate in our P2P-based Social IPTV platform Thorsten Strufe, P2P, TU Darmstadt Peer-to-Peer Networkíng Group 29