[46069] in Cypherpunks
practical annoyances from multi-level security?
daemon@ATHENA.MIT.EDU (Simon Spero)
Fri Dec 29 02:04:23 1995
Date: Thu, 28 Dec 1995 22:20:22 -0800 (PST)
From: Simon Spero <ses@tipper.oit.unc.edu>
To: cypherpunks@toad.com
Does anybody have any pet peeves and gripes about using
systems with a compartmentalised security model- things that took ages to
do even though they didn't really impact security, features that just got
in the way or were too complicated to really use, etc?
I'm currently working on a problem that seems to have some analogies to
the compartmentalised problem, running code with various levels of trust
were deliberate read-up and accidental write-down could be a breach.
I've personally never used a system of this sort, but I've heard from
friends in the RAF doing COM/SEC (more COM than SEC) that MLS can be a
real pain at times. [for the truly paranoid, the RAF operates a network
of communication satellites called Skynet :-)]
Simon
p.s.
still no luck on the Hackers soundtrack - I did recognise a few prodigy
tracks though
(defun modexpt (x y n) "computes (x^y) mod n"
(cond ((= y 0) 1)
((= y 1) (mod x n))
((evenp y) (mod (expt (modexpt x (/ y 2) n) 2) n))
(t (mod (* x (modexpt x (1- y) n)) n))))
