Struggling to maintain cybersecurity requires some tough demands - unguessable passwords, two-factor keys, not writing anything down - but make one mistake and you're locked out. Or you could reduce all of that complexity to a single roll of 25 dice into a plastic box. Stuart Schechter, a computer scientist at the University of California, Berkeley, is launching DiceKeys, a simple kit for physically generating a single super-secure key that can serve as the basis for creating all the most important passwords in your life for years or even decades to come.