Newbie Q: decryption

[Robert J. Hansen]

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> Having GnuPG use swap partitions/files is a risky business.

As a general principle, I'm unconvinced of the truth of this as a  
general statement.

It's risky within certain security models.  Let's not go about saying  
it's universally risky.  Let's also not recommend encrypting swap  
space _a priori_ without also warning people of the (massive)  
performance penalty that can result from encrypted swap.  I recall  
seeing some numbers from OpenBSD that indicated encrypted swap  
resulted in a 33% slowdown for swap access compared to unencrypted  
swap.  This could be related to OpenBSD internals or it could be  
indicative of a deeper problem with encrypted swap.  Either way, the  
potential downsides of encrypted swap should be considered before  
anyone decides to undertake this.


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