even as an aging protocol with some prevalent criticism, it’s still used quite pervasively. It shows up most notably in PPTP VPNs, and is also used quite heavily in WPA2 Enterprise environments — often in cases where its mutual authentication properties are being relied upon. (via Divide and Conquer: Cracking MS-CHAPv2 with a 100% success rate)
- At this point, a question of feasibility remains. In 1998, the EFF used ASICs to build Deep Crack, which cost $250,000 and took an average of 4.5 days to crack a key.
- David Hulton’s company, Pico Computing, specializes in building FPGA hardware for cryptography applications. They were able to build an FPGA box that implemented DES as a real pipeline, with one DES operation for each clock cycle. With 40 cores at 450mhz, that’s 18 billion keys/second. With 48 FPGAs, the Pico Computing DES cracking box gives us a worst case of ~23 hours for cracking a DES key, and an average case of about half a day.