Defending your enterprise against a cyberattack is harder than it's ever been. These days, hackers operate with a huge degree of sophistication and covert skill. For all you know, your business could be under siege by hackers at this very moment.
Gregory Hanis is a bad guy gone good, a "retired grey hat hacker, now doing white hat stuff for random people." His change of hats is nothing out of the ordinary - in fact, he follows in a long line of reformed cyber baddies who now use their hacking powers to pave the way for better cybersecurity.