The DL3 FE sets a higher standard for encrypted portable storage. The DL3FE is an external hard drive that uses 2-pass cascading encryption. The DL3 FE utilizes two independent crypto engines each using a random, unique 256-bit keys to encrypt your data first with 256-bit AES XTS mode algorithm and then sequentially with the 256-bit AES CBC mode algorithm. Each bit of stored data is encrypted twice with two independent keys which never leave your device.