Study Of Preventing Video Information Leakage For Computer Based On DMD Display Equipments

An analysis of the computer video channel is made in this paper, and the main leakage source of computer system is studied. The system structure of Digital Micromirror Devices (DMD) and the principle of Digital Light Processing (DLP) are researched, with emphasis on the ability for DMD to prevent Information Leakage. A new parallel transmission mode is designed, which base on the technology of"Bit-Plane Separation", and synchronous transmission of multiple pixels can be achieved by this mode, the radiation characteristic of pulse edge which transmitted in parallel cables is analyzed with simulations. Then a new method of preventing computer's information leakage is presented.A system for preventing computer's video information leakage is developed, which base on DMD display equipments. The Format-transform module of video information base on the technology of"Bit-Plane Separation"is designed by Verilog HDL. The hardware designed of this system is completed, which processes data based by FPGA. The system program is synthesized and simulated with Quartus II, and the simulation result obtained demonstrated that the system is fulfilling the real-time request completely, and the feasibility of the system is verified.