The FBI has the iPhone of the San Bernadino shooters, and would very much like to examine its contents. But they have a problem: the contents are encrypted; guess the wrong password ten times, and the phone will self-destruct like one of those tapes in Mission Impossible (that’s not a technically correct analogy, of course: the data would end up permanently encrypted, and there would be no smoke). The FBI thus got a judge, using the authority of the 1789 (sic!) All Writs Act (more on this another day; for some initial analysis, see here), to order Apple to disable the auto-destruct, which would allow the FBI to fire up its biggest computers to try to guess the password by brute force. In what is likely to be the beginning of a very long legal fight, Apple refused, arguing that there would be no way to open this individual phone without creating a back door that would enable access to all phones of that type.