1. OneSwarm: Privacy Preserving P2P
Roberto Alberdeston
CAP 6135
Spring 2012
Reference: Privacy-preserving P2P data sharing with OneSwarm
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Alberdeston - CAP6135 Spring 2012

2. Alberdeston - CAP6135 Spring 2012
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3. Alberdeston - CAP6135 Spring 2012
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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4. OneSwarm Characteristics
Privacy Focused P2P Network
User Defined Access Control
Data is transferred using trusted and untrusted nodes. (transfer dependent)
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5. OneSwarm Characteristics (cont)
Multi Path Packet Transfer
Congestion Aware Network
Bit Torrent Capable Client
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6. 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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7. OneSwarm Key Focus Areas
User Based Privacy
Performance
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8. Alberdeston - CAP6135 Spring 2012
OneSwarm Benefits
Better Performance/Privacy
Runs most file formats natively
Bit Torrent Compatible
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9. OneSwarm Benefits (cont)
Multiple Permission Settings
Persistent Identities
Multi Path Packet Delivery
Cost Reduction for Content Distribution (ex: YouTube)
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10. 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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11. Alberdeston - CAP6135 Spring 2012
OneSwarm Data Sharing
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12. OneSwarm: Finding Data
Public/No Attribution
Search Based
Private
Advertising
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13. Alberdeston - CAP6135 Spring 2012
OneSwarm Components
Client/Node
Trusted
Untrusted
Replicas
Community Servers
Key Management + Transfer
Groups/Subscriptions
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14. Alberdeston - CAP6135 Spring 2012
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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15. Alberdeston - CAP6135 Spring 2012
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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16. Alberdeston - CAP6135 Spring 2012
OneSwarm: Fairness
New Users start with default “contribution” value.
If the upload/download ratio > 1, user is given access to more nodes in transfer.
Promotes fairness and ensures performance
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17. Alberdeston - CAP6135 Spring 2012
OneSwarm Security
Protocol Security Components
Prevent Timing + Collusion Attacks
Components
Randomization of Nodes
Force Delays
User Control Forwarding Probability
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18. Alberdeston - CAP6135 Spring 2012
OneSwarm Testing
Real World
LonePlanet Computers
100k User Provided Statistics
Simulation
Last.fm Social Graph
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19. OneSwarm Testing (cont)
Data Analysis
Session Times
Geographic Distribution
Usage Patterns
Upload Capacity
Download Capacity
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20. 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 >> TOR
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21. Alberdeston - CAP6135 Spring 2012
OneSwarm Conclusion
P2P Network
Privacy
Performance
User Based Permissions
Mesh of Trusted and Untrusted Nodes
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22. OneSwarm Conclusion (cont)
Three Data Sharing Models
Public
Anonymous
Private
Inherent Security Components
Best PRIVACY/PERFORMANCE
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23. Alberdeston - CAP6135 Spring 2012
OneSwarm Conclusion
Questions?
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