Never Been KIST - Tor’s Congestion Management Blossoms with Kernel-Informed Socket Transport

Never Been KIST - Tor’s Congestion Management Blossoms with Kernel-Informed Socket Transport

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KIST Increases Tor Congestion

9 of 16

9 of 16

KIST Increases Tor Congestion

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Never Been KIST - Tor’s Congestion Management Blossoms with Kernel-Informed Socket Transport

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  1. 1 Intro
  2. 2 Anonymous Communication: Tor
  3. 3 Relay Overview
  4. 4 Relay Internals
  5. 5 Analyzing Causes of Congestion
  6. 6 Problem 1: Circuit Scheduling
  7. 7 Problem 2: Flushing to Sockets
  8. 8 Ask the kernel, stupid! . Utilize getsockopt and ioctl syscalls
  9. 9 KIST Increases Tor Congestion
  10. 10 KIST Reduces Circuit Congestion
  11. 11 KIST Improves Network Latency
  12. 12 Traffic Correlation: Latency
  13. 13 Latency Attack
  14. 14 Traffic Correlation: Throughput
  15. 15 Throughput Attack Results
  16. 16 Conclusion . Where is Tor slow?

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