This book is a contribution to the ongoing research in the design of hard disk encryption, an important field used to protect the confidentiality of data in the disk. We focus on tweakable ciphers as these appear to offer the best combination of security and performance. In this book, we highlight the research to date in the area of disk encryption and propose a novel narrow-block disk encryption mode of operation with compression of data first. This is the Tweaked Block Chaining (TBC) mode usi ...