Re: A good reason for moving to capabilities [facetious]

Andrej Presern (andrejp@luz.fe.uni-lj.si)
Mon, 27 Apr 1998 12:50:26 +0200

Matthew Wilcox wrote:
>
> U.S. Patent 4,135,240 held by one Dennis Ritchie patents the idea of
> setuid (according to Silberschatz & Galvin's Operating System Concepts,
> 4th edition page 621). Wonder if there are any patents on capabilities?

There's a patent on KeyKOS key factory that helps solve the problem of
secure operation among mutually suspicious users. There are no patents
on pure capabilities themselves (if that is what you had in mind), same
as there are no patents on ACLs and capability lists.

Andrej

-- 
Andrej Presern, andrejp@luz.fe.uni-lj.si






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