what's the optimal approach to encrypted filesystems?

[Robert P. J. Day]

  what is the preferred approach to supporting encrypted filesystems
under fedora?  the cryptoloop HOWTO at www.tldp.org,
  http://www.tldp.org/HOWTO/Cryptoloop-HOWTO/index.html
seems to suggest that the 2.6 kernel is necessary, and also seems
to require newer userspace tools.

  the HOWTO also refers to loop-AES as being more mature, but
requiring kernel patches, as an alternative to cryptoloop.

  so what's the recommended approach?  and can anyone comment
on the long-term direction of encrypted filesystems?  is there some
approach that is expected to become the standard?

rday