Are you sure?
If your plugin only handles encryption, how is it that when I use your password recovery utility the system sends me my username and password (now decrypted) via email?
I understand if it's not possible to use SA for encrypting/decrypting other data, but this might be a feature you should consider adding. I imagine many of your users would benefit by being able to secure db information outside of just the login process.
Thanks, you guys are the best!