Efficient Authenticated Encryption for Hybrid Hard Drives Based on GCM

Hybrid hard drives (HHD) are coming up with potential high viability in mobile computing. It´s quite necessary to put forward an efficient secure scheme for hybrid hard drives. NAND Flash of HHD is made full use as a container and a buffer for metadata. We propose an efficient combined scheme based on Galois/Counter Mode (GCM) to protect hard disk data by authenticated encryption, and build a secure architecture for HHD. Our results show that we not only protect the disk data by authenticated encryption, but also gain high performance. According to the simulation results, for the best of our methods, the performance overhead is less than 18%, which is efficient and acceptable practically.