the author of this app says:
Guard against security breaches, hackers, and temporarily lost or stolen devices with eZcase, a long awaited secure data storage application for BlackBerry. eZcase is designed to safely and securely store sensitive data, whether personal or corporate. eZcase uses industry standard encryption algorithms to protect data from unwanted visitors, making it one the most secure data storage application for mobile devices. A simple intuitive interface means access and retrieval of information is a snap: when the entry is selected, it takes only a glance to see all the relevant data in the preview pane.