The Research And Implementation Of Double Key Mode Security Mobile Hard Disk

With the full arrival of the information age,mobile storage device has become an indispensable tool in people's life.As a cost-effective mobile storage product,the mobile hard disk provides great storage capacity and good convenience at a price range acceptable to users.The demand for mobile storage devices is no longer limited to transmission speed and storage capacity,security performance has also become an important indicator of mobile storage devices.In order to improve the security performance of mobile hard disk and prevent someone from stealing or tampering important data.An double key mode security mobile hard disk is proposed and implemented in this paper,support PIN code and fingerprint to unlock encrypted data in mobile hard disk.An double key mode security mobile hard disk designed in this paper adopts a bridge controller with encryption and decryption function to implement data encryption transmission between the USB host transmission interface and the SATA device.This encrypted bridge is composed of an encrypted bridge chip and a fingerprint recognition module.The encrypted bridge chip integrates the AES hardware core,the USB core,the SATA core and the DBUF core,the communication between those cores is accomplished through firmware design.The fingerprint identification module on the encrypted bridge controller is connected to the encrypted bridge chip through the SPI interface.The fingerprint identification module is composed of a fingerprint sensor and a fingerprint algorithm chip,and the fingerprint algorithm chip obtains the fingerprint information of the user through the fingerprint sensor.In order to manage the user's fingerprint information efficiently,this paper also designs the fingerprint management software.The fingerprint management software not only supports the management of the fingerprint template in the fingerprint algorithm chip but also supports unlocking the safety area of the mobile hard disk with PIN code,implemented double key mode management for mobile hard disks.This paper also designs an identity binding authentication mechanism and a secure communication mechanism for the fingerprint algorithm chip,the encryption bridge chip and the fingerprint management software,which greatly reduces the possibility of illegal users obtaining the security zone authority.At last,the function and performance test of the double key mode security mobile hard disk have met the expected requirements.