Nvidia is justifiably proud of how their GPU can accelerate scientific applications. People have been able to speed up everything from ray tracing to computational chemistry by 10x to 50x. Unfortunately, tools for good can also be used for evil. In this case, accelerating brute-force password cracking, for Wifi network encryption: Turbo-charged wireless hacks threaten networks.
Russian firm ElcomSoft has applied GPU acceleration technology to its password recovery tool to allow PCs or servers running supported NVIDIA video cards to break Wi-Fi encryption up to 100 times faster than is possible by using conventional microprocessors.