OneSwarm: Privacy Preserving P2P

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OneSwarm Privacy Preserving P2P

• Roberto Alberdeston
• CAP 6135
• Spring 2012
• Reference Privacy-preserving P2P data sharing
  with OneSwarm
• http//oneswarm.cs.washington.edu

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http//www.OneSwarm.org
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OneSwarm Terms

• P2P - a computer network in which each computer
  in the network can act as a client or server,
  allowing shared access to resources without
  central server.
• Swarm - is the collective behavior of
  decentralized, self-organized systems.

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OneSwarm Characteristics

• Privacy Focused P2P Network
• User Defined Access Control
• Data is transferred using trusted and untrusted
  nodes. (transfer dependent)

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OneSwarm Characteristics (cont)

• Multi Path Packet Transfer
• Congestion Aware Network
• Bit Torrent Capable Client

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Issues with Current P2P Systems

• Bit Torrent
• Great performance but poor privacy
• Freenet
• Anonymous but lacks access control
• TOR
• Nodes participate in questionable traffic

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OneSwarm Key Focus Areas

• User Based Privacy
• Performance

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OneSwarm Benefits

• Better Performance/Privacy
• Runs most file formats natively
• Bit Torrent Compatible

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OneSwarm Benefits (cont)

• Multiple Permission Settings
• Persistent Identities
• Multi Path Packet Delivery
• Cost Reduction for Content Distribution (ex
  YouTube)

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OneSwarm Data Transfers

• Mesh of trusted/untrusted nodes
• Three Types of Transfers
• Public
• No Attribution (Anonymous)
• With Permission (friend-2-friend)

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OneSwarm Data Sharing
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OneSwarm Finding Data

• Public/No Attribution
• Search Based
• Private
• Advertising

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OneSwarm Components

• Client/Node
• Trusted
• Untrusted
• Replicas
• Community Servers
• Key Management Transfer
• Groups/Subscriptions

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OneSwarm Node Privacy

• Each Client/Node
• ID using public (RSA) key per node
• List of Nodes
• List kept in DHT (distributed hash table)
• DHT has 20 copies (fault tolerance)
• Data/Files
• Named with 160-bit SHA-1 hash

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Growing the Swarm

• Gtalk User List
• Import Gtalk Connection
• Local Area Network
• Automatically shared keys with LAN
• Manual Key Exchange (Friends)
• Most Popular Method

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OneSwarm Fairness

• New Users start with default contribution
  value.
• If the upload/download ratio gt 1, user is given
  access to more nodes in transfer.
• Promotes fairness and ensures performance

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OneSwarm Security

• Protocol Security Components
• Prevent Timing Collusion Attacks
• Components
• Randomization of Nodes
• Force Delays
• User Control Forwarding Probability

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OneSwarm Testing

• Real World
• LonePlanet Computers
• 100k User Provided Statistics
• Simulation
• Last.fm Social Graph

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OneSwarm Testing (cont)

• Data Analysis
• Session Times
• Geographic Distribution
• Usage Patterns
• Upload Capacity
• Download Capacity

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OneSwarm Testing (cont)

• Results of Testing
• Most permission based relationship were
  friend-to-friend
• Transfers over the multipath P2P network FASTER
  than point-point
• Temporarily overloaded clients NOT common
• Transfer Speed gtgt TOR

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OneSwarm Conclusion

• P2P Network
• Privacy
• Performance
• User Based Permissions
• Mesh of Trusted and Untrusted Nodes

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OneSwarm Conclusion (cont)

• Three Data Sharing Models
• Public
• Anonymous
• Private
• Inherent Security Components
• Best PRIVACY/PERFORMANCE

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OneSwarm Conclusion

• Questions?