Give the gift of Drupal. All merchandise is 50% off through 2016.
I thought I would put this out to the community in case someone finds it useful.
When editing a node, the module provides a small sandbox within the node edit form to allow the insertion of encrypted text. On a page with encrypted text a textfield is available where a pass phrase can be entered to perform the decryption.
The module is available for perusal/download at equivocation.org/cse.