I wrote a paper for my Operating Systems class this recent semester about covert channels.

Abstract

A thirty year-old problem, covert channels continue to plague the security of modern operating systems. These channels are explained and discussion of the subject is motivated. A short evolution of the problem is given as well as several classifications of covert channels. Several methods such as type enumeration, flow analysis, virtualization, and adding noise are discussed and analyzed. Finally, one system is evaluated in context of those methods and future directions into covert channel research are suggested.

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I harm but one, until I’m told. I cure all ills, until I’m known. Not always am I known when I’m told; not always am I told when I’m known. My masters become my slaves until truth behold. Small in stature, white in color, but never seen with the eye. What am I?

View the lost line for a hint.

Copyright © 2007 Christopher R. Wojno so don’t try to cheat by looking up the answer online (yet). All rights reserved. You need written permission to use this for anything not covered by fair use.

Ever notice: In every car commercial, all paved roads are recently well watered?