Encrypted database?

As part of an all-around security upgrade, I would like to secure the
data in my PostgreSQL db. The threat I am concerned about is theft of
the server machine. To protect the data in case the machine is
stolen, the best thing to do would be to keep the data encrypted on
the disk.

Is there a way to do this with PostgreSQL? Or should I try to do the
encryption at the filesystem level? The other alternative is to store
the PostgreSQL db files on a CFS system, but I'm worried that this
might have serious performance penalties. Any other options I should
look into?

Thanks,

e

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