Cryptainer LE is part of a suite of security products offered by the company that works on Windows. The LE product is their free version which offers some compelling features such as:

* Disk encryption for files and folders (Blowfish algorithm)
* Creation of secure email attachments
* Virtual drive that appears in Windows Explorer
* Passwords from 8 to 100 characters

The other item that distinguishes Cryptainer LE is that it has a component that can be loaded on to USB drives called Cryptainer Mobile. This means you can carry your data on the thumb drive without needing a program on the host computer to decrypt. The one caveat is this doesn't work with Windows 98 and Windows ME since those operating systems don't auto load USB drivers.

The full description is on the website

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