[E-Lang] ACLs + delegation

Jonathan S. Shapiro shap@cs.jhu.edu
Thu, 01 Feb 2001 07:46:13 -0500

David Wagner wrote:

> Yes.  I must admit I haven't thought about confinement (in the Lampson
> sense of eliminating covert channels), because I frankly feel that the
> best answer to the confinement question is to unask the question.

The Lampson paper considers both covert and overt channels. I agree that
the covert channel problem is hard, but it is less hard than many
assume. See the paper on fuzzy time in the 1991 Oakland (IEEE Symposium
on Security and Privacy) proceedings.