Honestly, I'm pretty damned excited about Jetpack. Long-time readers of LWN.net might notice that I always post a comment after one of these articles bemoaning the futility of combatting malware by controlling authorship of code and by auditing enormous codebases. I've often alluded to the possibility of a better system based on confinement and dynamic access controls (i.e. capabilities). Jetpack is finally an attempt to do it that way.
Disclosure: Jetpack is being designed by my good friend and long-time collaborator (on the Tahoe-LAFS project) Brian Warner. Even if I didn't already think the basic idea was super great I would be biased towards liking Jetpack just because Brian Warner is awesome.
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