Security and Cooperation in Ad Hoc Networks

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Security and Cooperation in Ad Hoc Networks

Gaia Maselli IIT - CNR gaia.maselli_at_iit.cnr.it
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The availability problem

• Problem how to avoid that some nodes misbehave
• to find out a mechanism to detect and isolate
  misbehaving nodes
• Cooperation misbehavior
• Malicious misbehavior intentional DoS attack
• Selfishness no routing/forwarding to save
  resources

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Current approaches

• Watchdog Reputation system
• Watchdog weaknesses a node might not detect a
  misbehaving node in presence of
• collisions
• no homogeneous transmission ranges
• Drawbacks of cooperation in security mechanisms
• overhead (additional traffic)
• wrong accusations spreading

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A different approach?

• New challenges
• Detection of misbehaving nodes without watchdog
• No spreading of false information

?