Covert Channel Tutorial

High-speed Covert channel Attacks in the Cloud 

  • The challenges in conducting covert channel
    • scheduling uncertainty
    • address uncertainty
    • cache physical limitations
      • Different VMs may not share cache
      • This can be overcomed by the atomic operations implementation in the system
        • i.e., the memory bus will be locked when a cache is being locked.
  • Memory-bus based covert channel attacks

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