Good to know

An Analysis of Apple's FileVault 2.

This is an analysis of Apple’s disk encryption program, FileVault 2, that first appeared in the Lion operating system. Short summary: they couldn’t break it. (Presumably, the version in Mountain Lion isn’t any different.)

[Schneier on Security]

This is good news, but of course it’s important to keep in mind that FileVault 2 security can be compromised by accepting the option (on by default, as I recall) to send a recovery key to Apple. The best security in the world is useless if you give the keys to someone who will give them up the first time some thug points a gun at him.