Apple snags Ex-OLPC security chief
blogs.zdnet.com
blogs.zdnet.com
I moved to California and joined the local fruit vendor
(Read the short post, contains MIT and PyCon ;-)
(Only kinder and gentler if you are not on the end of their DDOS attack!)
Newer versions of windows also have a very advanced security model.
OSX is the weakest current OS, and one of the easiest to exploit. There's a number of ways you can crash and exploit it... it's just too easy.
It's funny that Ivan was blasting apple for having a very weak OS. http://radian.org/notebook/nils2own Not his own work, but someone he has associated with found the various exploits.
Considering how much damage he did to OLPC by writing bad things about it, apple would do well to hire him... just to stop the bad publicity. I can't wait to he quits... it'll be very entertaining.
The Bitfrost architecture follows strong requirements regarding the ease of use of security mechanisms (e.g. no user passwords, no reading required). Perhaps Apple just tries to get someone smart for the necessary security improvements who aims for a slightly more pleasant user experience than UAC.