Re: encrypted swap

Chris Wedgwood (cw@f00f.org)
Wed, 8 Aug 2001 04:03:26 +1200


On Tue, Aug 07, 2001 at 10:37:57AM -0400, David Maynor wrote:

This is a should-if debate, in my opinion. That is, not if you can
do it, but should you. Has anybody thought of the performance hit
that you would take encrypting your swap?

Yes, and people have written papers about it.

If you use hardware, the difference is insignificant. In software,
it's measurable (maybe a 30% hit) but still quite acceptable. See the
Usenix Security Symposium Proceedings for 2000 (I'm too lazy to find
the paper myself).

--cw
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