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Harden Up: Can We Break Your Password With Our GPUs?

Test Setup

Test Hardware
ProcessorIntel Core i5-2500K (Sandy Bridge), 3.3 GHz, LGA 1155, 6 MB Shared L3
MotherboardAsus P8P67 Deluxe
MemoryKingston Hyper-X 8 GB (2 x 4 GB) DDR3-1333 @ DDR3-1333, 1.5 V
Hard DriveSamsung 470 256 GB
GraphicsPalit GeForce GTX 460 1 GBAsus GeForce GTX 570 1.28 GBAMD Radeon HD 5870 1 GB
Power SupplySeasonic 760 W, 80 PLUS
System Software and Drivers
Operating SystemWindows 7 Ultimate 64-bit
DirectXDirectX 11
DriverNvidia 270.51Catalyst 11.4
Software
Visual Zip Password Recovery ProcessorVersion: 6.2
Advanced Archive Password RecoveryVersion: 4.53
Accent Zip Password RecoveryVersion: 2.01
Accent RAR Password RecoveryVersion: 2.01
Parallel Password RecoveryVersion: 1.6.0
WinZipVersion: 15.5 ProEncryption: Zip 2.0 (default), AES-128, AES-256Compression: No Compression, Zipx/PPMd (default), Zip/deflate
WinRARVersion: x64 4.00Encryption: AES-128Compression: Normal, Store

It's important to point out that WinZip offers three different encryption options: Zip 2.0, AES-128, and AES-256, along with several compression schemes. WinRAR is much simpler in that it only offers AES-128 encryption and different levels of the same compression scheme. I'm testing with several variations to show you how this affects the speed of password recovery.