基于SM2算法的硬件数据加密研究

Research on Hardware Data Encryption Based on SM2 Algorithm

针对某满足国Ⅵ标准的商用车监控终端与监管平台间数据传输的加密问题,以LKT4035芯片为基础,实现了一种基于国密SM2算法的硬件数据加密方法。根据LKT4035芯片通讯接口要求,基于IIC协议对该芯片通讯时序进行模拟,并通过该芯片自定义指令协议,创建了一种公钥加密、私钥解密的数据结构,实现了加密芯片与车载终端主控制器的数据交互。最后对该硬件数据加密方法进行功能验证及加密耗时测试。实验结果表明,该方法能够稳定有效对车辆数据进行加密、解密,满足国Ⅵ标准中对数据加密的要求。

Aiming at the encryption problem of data transmitted between a commercial vehicle monitoring terminal and a supervisory platform that meets the ChinaⅥ,a hardware data encryption method based on the national secret SM2 algorithm is implemented based on the LKT4035 hardware encryption chip.According to the requirements of the communication interface of the LKT4035 chip,the communication timing of the chip is debugged based on the IIC protocol,and a data structure of public key encryption and private key decryption is created through the chip's custom command protocol,which realizes the encryption chip and the vehicle terminal data interaction of the main controller.Finally,the hardware data encryption method is verified through the debugging assistant.The experimental results show that the method can stably and effectively encrypt and decrypt vehicle data,and meet the requirements for data encryption in the ChinaⅥ.