Pocket Cache was developed to help you protect important information from prying eyes. The password and important information are saved in a protected format. Note that encryption is not used but it is believed that the protected format is sufficient to protect information from the casual snoop.
What's new in Pocket Cache
Version 1.6.0.0:
added a Font Size menubar item that lets you increase/decrease the text font size.
Font size is saved between sessions.
It is a good idea to back up My Secret Info data in a separate file before upgrading to a new version.
So encryption is not used... Well I see no reason to switch from using MacOS X's encrypted sparse disk images then.
Just open Disk Utility (in /Applications/Utilities/), make a new disk image, choose an insanely high storage size, select "sparse" for the type, and choose an encryption. And you're done.