Who Needs a Tweak? Meet Full Disk Encryption

XEX-based tweaked-codebook mode with ciphertext stealing

I was discussing with an industry professional about the storing of files on an encrypted USB device, and I said, “But how are the files encrypted on the device?”, “I don’t know”, “Is it AES, and what’s the key size?”, “I don’t know”. I thus sometimes worry about the depth of knowledge applied…