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Double-Purpose Graphic Cards: Password Audit Goes Greener And Faster (Andrey Belenko, Elcomsoft)
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Double-Purpose Graphic Cards: Password Audit Goes Greener And Faster (Andrey Belenko, Elcomsoft)

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Too much has changed in computer security by now, however the power of today’s conventional computers is not enough for many challenging tasks. Password auditing and forensic analysis require much …

Too much has changed in computer security by now, however the power of today’s conventional computers is not enough for many challenging tasks. Password auditing and forensic analysis require much computation to be carried out. This leads to building large and expensive clusters which are difficult to set up and manage and which consume lot of energy – bad choice and eco-ineffective.
Now we have got a great alternative: innovative technologies based on graphic cards implementation that allow for higher performance and lower power consumption. GPU computation virtually opens new computer security reality. For example, you can audit the security of your network encrypted with WPA/WPA2.
This will be shown in practice. You will also learn the inside-outs of password protection to escape false sense of security later on and hear our blitz report on common password policy errors.

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  • 1. Graphic Cards: Password Recovery goes Faster and Greener
  • 2. Who may need Password Recovery?  Ordinary users (own passwords)  IT Departments (employee’s passwords)  Security auditors, consultants and penetration testers  Law enforcement & government  Hackers usually don’t!
  • 3. Why speed counts? Users and IT Departments: «We needed those passwords yesterday» Auditors, consultants and pentesters: «Time is Money»
  • 4. How to increase speed? Traditional way is to network together many computers to form a cluster • Communication overhead • Difficult to manage • Not power-efficient
  • 5. Any other options?
  • 6. Yes! For many HPC applications GPUs are many times faster than CPUs But they’re not only faster, they are greener!
  • 7. Why?
  • 8. CPUs are designed to be efficient at serial computing… …while GPU’s main concern is parallel computing
  • 9. Intel® Core™ i7-965 “The highest performing desktop processor on the planet.” 4 cores 3,2 GHz 731 million transistors 263 mm2
  • 10. Memory Controller IO IO Q Core Core Core Core u e u e QPI QPI L3 cache 8 Мb >384 million transistors
  • 11. Out-of- Memory Controller Order Execution Units Scheduling & Retirement IO IO Q Ordering & Execution u Instruction Core Core Core Core Memory L1 e Decode & Data Microcode u e Branch Prediction Inst Fetch & L1 QPI QPI Paging L3 cache L2 8 Мb >384 million transistors
  • 12. Memory Controller IO IO Q Core Core Core Core u e u e QPI QPI L3 cache 8 Мb >384 million transistors
  • 13. CPU dedicates only about 10% to the execution units! 1/10
  • 14. CPU dedicates only about 10% to the execution units!
  • 15. NVIDIA® GeForce® GTX 285 240 cores 1.476 GHz 1.4 billion transistors 470 mm2
  • 16. PCIe & TPC TPC TPC Memory TPC TPC Controller Thread ROP Setup ROP Dispatch Memory TPC TPC TPC TPC TPC Controller
  • 17. PCIe & Multiprocessor Multiprocessor Multiprocessor TPC TPC TPC Memory TPC TPC Controller Thread ROP Setup ROP Dispatch Texture Memory Fetch & TPC TPC TPC TPC TPC Controller Other
  • 18. PCIe & TPC TPC TPC Memory TPC TPC Controller Thread ROP Setup ROP Dispatch Memory TPC TPC TPC TPC TPC Controller
  • 19. GPU dedicates about 30% to the execution units! 1/3
  • 20. GPU dedicates 6 times as many resources to the execution units as CPU! 183 Watts 6x130=780 Watts full load full load
  • 21. Performance 680 250 LM 195 32 S1070 GTX 295 2 600 1 330 NTLM GTX 285 795 87 Q6600 1 920 920 MD5 570 70 0 1 000 2 000 3 000 Millions passwords per second
  • 22. Performance per $ 85 521 LM 557 S1070 178 GTX 295 325 2 771 NTLM GTX 285 2 271 483 Q6600 240 1 917 MD5 1 629 389 0 500 1 000 1 500 2 000 2 500 3 000 Thousands passwords per $ per second
  • 23. Are passwords broken? No, but it is good time to review password policy!
  • 24. • Use password manager • Don’t use pronounceable word as password • Use random set of (at least) lowercase and uppercase letters and digits as password • Windows: use passwords of at least 10 characters long • Change your passwords regularly • Review password policy regularly
  • 25. Performance per Watt 850 865 LM 1 066 305 S1070 GTX 295 3 250 4 602 NTLM GTX 285 4 344 829 Q6600 2 400 3 183 MD5 3 115 667 0 1 000 2 000 3 000 4 000 5 000 Thousands passwords per watt per second
  • 26. Greener Computing • Consider a cluster of 25 dual-CPU quad-core computers • 400 watts full load each • 10’000 watts total
  • 27. Greener Computing • Two Tesla S1070 provide same performance • 800 watts full load each • One computer for management • 2’000 watts total
  • 28. Greener Computing • 8’000 watts saved • 49’090 kWh a year (at 70% utilization) • £3’436 savings on electricity a year (at 7p per kWh average rate) • Prevents 27’500 kg CO2 emission • Takes 5 cars off the road • Saves 2’300 trees/year
  • 29. Thank You! Andrey Belenko a.belenko@elcomsoft.com