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Security Examination in Ad Hoc Networks: Insights from Kavacha

This paper explores security challenges in ad hoc networks, focusing on Kavacha, a system designed to improve secure communications. The authors, including Team A. Lane Westlund and others, present findings on big integer overflow issues, stress test results, and user-group interactions. Key bugs and features are discussed, such as uncaught exceptions during group joining and random member approvals, highlighting the need for stable group control. With implications for improving group security, the paper details instability issues and the limitations on group sizes observed during testing.

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Security Examination in Ad Hoc Networks: Insights from Kavacha

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Presentation Transcript

  1. Kavacha examination Security in Ad Hoc Networks – Team A Lane Westlund, Roderic Campbell, Mark Allen, Dima Novikov, David Campbell

  2. Big Integer Overflow not an issue: Modulus performed during each round, and not at the end as previously thought.

  3. Stress Testing Use cases: • Joining one’s own group throws uncaught exception • If you are the only one in the group you created, and send data…. Throws null pointer exception in Kavacha • Bug or feature? Doesn’t always ask the group creator to accept new users… asks random member

  4. Servers • Controller appears to change randomly • Previous controller is dropped from group after switch • Group appears unstable

  5. Tests • Under 4 group members, 3-4 seconds to reform group key. • Unable to form group larger than 4 members

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