It didn't take Delpy long to guess why his laptop had been the target of a literal black bag job. It contained the subject of his presentation at the Moscow conference, an early version of a program he'd written called Mimikatz. That subtly powerful hacking tool was designed to siphon a Windows user's password out of the ephemeral murk of a computer's memory, so that it could be used to gain repeated access to that computer, or to any others that victim's account could access on the same network. The Russians, like hackers around the world, wanted Delpy's source code.