[Orgmode] Symmetric encryption with org-crypt.el?

[Rick Moynihan]

Is it possible to use a symmetric cipher with org-crypt.el?  I'd really 
like to encrypt certain outlines and encode/decode them on several 
machines without worrying about managing public/private keys.

I can see how using public key crypto might be benefecial when sharing 
files between several parties, but for the case where a single user 
simply wants to synchronise org files between various machines (and 
never store/transmit sensitive data unencrypted) then a symmetric cipher 
seems preferable due to its lower overhead.

Has anyone done this?

R.