David Hulton organizes the ToorCon suite of conferences and has spent nearly 20 years doing security research mostly focused on reverse engineering and cracking crypto. He’s mostly known for developing the bsd-airtools wireless attack tools in the early 2000’s, developing and presenting the first practical attack on GSM a5/1 in 2008, and releasing a DES cracking service and tools to perform a full break of MSCHAPv2 authentication in 2012.