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Cloud Computing Discovers Covert Channels
Tue, 09/15/2009 - 1:56pm
A SANS Handler Notebook entry by Toby
Kohlenberg reports on data leakage in cloud computing
, and links to
a terrific paper from some UCSD/MIT people
: Ristenpart, Tromer, Shacham, and Savage.
If we set the wayback machine to the early 1970s, we find
a paper by Butler Lampson
about something called
the confinement problem
. It's the same thing. Ristenpart et al pick up some of the threads (like noninterference) though their paper doesn't point all the way back to Lampson.
This is a hard problem to solve. The only defense right now is if attackers lack the motivation to exploit it.
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