网络控制系统中的密码器研究

Research on encryption card for networked control systems

控制网络在与信息网络走向融合的同时,伴随着愈加突出的信息安全问题。提出采用DSP数字信号处理+USB高速数据传输接口的硬件结构+AES密码算法的解决方案,充分利用了三者的综合优势解决网络控制系统中节点间的信息安全交换问题,同时不影响网络控制系统的高实时性应用要求。在分析网络控制系统信息安全需求和密码器工作原理基础上,对密码器进行了总体设计,基于TMS320C6211的AES密码器仿真实现的加、解密处理速度约为40Mbps,验证了该方法的可行性。

With the integration of control network and information network,an outstanding problem on information security is presented.The solving scheme that using DSP digital signal processing pluses.USB high speed data transportation interface and AES encryption algorithm is proposed,it makes the best use of their compositive advantages to deal with the secure exchange on information between nodes in networked control systems(NCSs),while the property of high real time telecommunication in NCSs will not be impacted.Based on analysis on the requirements on information security in NCSs and the theory on encryption card,the general design on encryption card is done,the processing speed in encrypting or decrypting operations by the AES simulation encryption card based on TMS320C6211 is 40Mbps or so,it proves that the method is feasible and effective.