Sata2.0 Hard Disk Data Encryption And Decryption System Design And Implementation

Information security has become an important issue in 21th century, especially computer information security, arousing more and more attentation.Hard disks with SATA2.0 interface possess higher transmission rate, reliable, suppoting NCQ, port multiplexing and interleaving start-up merits to enable them instead of IDE Hard disks to become a main stream, being the carrier of information, it is extensively accepted by both enterprise class and individual class users.In this thesis firstly introduces the background of research, and then to analyse SATA2.0 protocol and ATA command transmission protocol, the focal points are the command and data tranmission protocol that releated with our design, and diffculties and problems of the design. And the followiing expounding the whole architecture of design and analysing functions of each module. And then it gives detailed explaination of data path design and the solutions to those difficulties problems, at the same time, it gives the verified results, and to analyse simply. Next, the thesis explains the encryption and decryption arithmetic which are used for hard disk, this part we use a configurable arithmetic based on CBC and ECB mode to complete the encryption and decryption successfully. And at the last, it gives the testing platform and testing solutions to whole design, and give analysis to the results.This SATA 2.0 hard disk encryption and decryption circuit has been tested in Virtex 5 XC5VLX50T FPGA of XILINX Corporation. The system works on a high performance and meets all requirements of the design. And it can transplant to other platform and can configure varied encryption and decryption arithmetic, it possess research meaning and economy meaning.