Applied to whole systems to make them more secure from hardware up:<p><a href="http:&#x2F;&#x2F;homes.cs.washington.edu&#x2F;~levy&#x2F;capabook&#x2F;" rel="nofollow">http:&#x2F;&#x2F;homes.cs.washington.edu&#x2F;~levy&#x2F;capabook&#x2F;</a><p>Modern project already running FreeBSD with capability security:<p><a href="http:&#x2F;&#x2F;www.cl.cam.ac.uk&#x2F;research&#x2F;security&#x2F;ctsrd&#x2F;cheri&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.cl.cam.ac.uk&#x2F;research&#x2F;security&#x2F;ctsrd&#x2F;cheri&#x2F;</a><p>Also look up CapDesk and DARPAbrowser.