On Fri, Mar 04 2011, Peter Jones wrote:

> Hopefully there's an autosave hook where you can encrypt the headings
> and save to disk using a temporary buffer without having to alter the
> current buffer and interrupt the user by encrypting a heading that is
> being edited.

I've recently added caching of encrypted text, so that org-crypt will
not recrypt the text once again if it has not been modified, but reuse
the previous crypting value.

That could be used to automagically re-encrypt all text before
auto-saving.

-- 
Julien Danjou
❱ http://julien.danjou.info