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Managing Privacy and Trust in P2P Communication

This project explores the management of privacy and trust in peer-to-peer (P2P) communication, focusing on person-to-person, group, and broadcast communication. It aims to develop novel solutions and prototypes to address privacy concerns and establish trust in P2P networks.

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Managing Privacy and Trust in P2P Communication

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  1. Privacy, Economy and Trust inP2P Content Distribution Managing Privacy and Trust in P2P Communication v. 0.7 Yki.Kortesniemi@hiit.fi Martti.Mantyla@hiit.fi 2.10.2003

  2. Types of Communication • We look at three types of communication: • Person-to-person communication • Examples: IM, e-mail, VoIP, SMS/MMS • Group communication • Sharing information in a group • Example: Private comments and annotations on business news shared with selected other users • Broadcast • (Commercial) content distribution • Example: News service where users comment items publicly thus becoming content creators

  3. P2P Communication • P2P can offer radically new possibilities for all forms of communication (broadcast, group, person-to-person): • Lower transaction costs (users pay for it) • Better geographical reach (users act as routers) • Better service availability (no single point of failure)

  4. We Need Privacy and Trust • Who are we communicating with? • How do we protect the privacy of each user’s communication and communication patterns? • Who do we trust as a source of information? • How do a convince others that I am trustworthy? • How is trust (karma) gained? How is trust different if the source is an individual or a community? • Is the information received from others received intact? • How to balance privacy with the need for earning trust? • Can we solve some privacy and trust problems by creating vs. depriving economic incentives for good vs. bad behaviour?

  5. Trust Model • We have the technology for enforcing many of these issues, but they are all governed by a trust model. How is this model gained? • From outside the system: • The person communicating knows the other party and knows they are trustworthy • Social filtering • The system learns/deduces the trustworthiness • Devices in close proximity are likely to participate in a meeting • Communication history (# of past successful/failed transactions) determines the degree of trust

  6. Trust Models for P2P • Some of the above problems already have a centralised solution • In a P2P environment, we need a distributed solution for trust modelling • General solution is a tough nut to break • Instead, we propose studying trust and privacy through studying progressively broadcast, group, and person-to-person communication integrated as a single focused “communications gadget”

  7. Project Proposal • Three-year project • 4 researchers • Annual budget of ~270 k€ • E.g., 4 companies, ~15 k€ each per year • Deliverables • Insight into P2P, novel solution concepts • Sequence of demonstration prototypes • year 1: P2P “broadcast” • year 2: year 1 + P2P group communication • year 3: year 2 + P2P VOIP or P2P IM • Scientific publications, theses

  8. Progression • Each year focuses on a new theme and builds on the previous years • Uses results from STAMI project as baseline • Co-operation with other research institutes • Example: economic issues with Berkeley • Goal: communication management is done with minimal user interaction • We automate most of the tasks • The remaining ones are integrated in the work flow

  9. Year 1: Broadcast Communication • Baseline: STAMI demonstration prototype for simple P2P content distribution • Extensions: • User-originated annotations, karma, … • Focus: Users as P2P broadcasters • How to enable user-originated information to be distributed effectively in a P2P network? • How to motivate users to donate bandwidth and battery resources to other users? • How to prevent / discourage unwanted use? • How to preserve privacy while enabling trust building?

  10. Year 2: Group Communication • Baseline: Year 1 • Extensions: • Discussions limited to a group • Group management • Focus: Managing group membership • How do we create, manage and dissolve a group in an ad-hoc situation? • How do we manage different group members rights to participate in communications? • Example: sharing contact information and presentation material with all parties in this meeting

  11. Year 3: Person-to-Person Communication • Baseline: Year 2 • Extensions: • Some person-to-person communication facility (P2P VOIP, P2P IM, …), preferably on the basis of an existing open source solution • Focus: Identity sharing and management • How can the different communication channels (broadcast, group, person-to-person) share user identities? • How to manage the various rights associated with various identities?

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