A hardware encryption and decryption system design

In allusion to the malpractice about pure software encryption techniques, this article puts forward an exploring thought and design process of a hardware encryption and decryption system. This system applies DES encryption algorithm, implements hardware encryption and on-line upgrade. It adopts FPGA chip and MCU as the control cores, applies microchip control technology to implement PCI bus protocol, DES algorithm and the communication with the storage device through a self-defined interface.