TCTS:基于FPGA的ETPM命令转换机制

TCTS: ETPM command transfer scheme based on FPGA

针对目前嵌入式系统使用嵌入式TPM(embedded TPM,ETPM)存在的资源浪费、效率不足等问题,在FPGA上实现了一种应用于嵌入式环境的ETPM。该方案对原TPM功能进行了精简,提高了ETPM资源利用率和效率,并在此基础上提出了一种ETPM命令转换机制(TPM command transfer scheme,TCTS),使基于标准TPM开发的应用程序不作或少作修改就能直接用在该ETPM上。描述了TCTS的设计实现流程,分析了其安全性,对其进行了有效性及性能测试,实验结果表明TCTS增加的额外开销不会对系统性能造成显著影响。

There are resource waste and inefficiency problems in embedded systems using embedded TPM(embedded TPM,ETPM).Therefore,this paper realized an ETPM of embedded system on FPGA.This method enhanced the resource utilization and efficiency of ETPM.Based on that,this paper also proposed a TPM command transfer scheme(TCTS).Thus,the applications developed by trusted software stack(TSS)and standard TPM could be applied on ETPM with as few modifications as possible or even no modification.At the same time,this paper described the design and realization process of TCTS.Finally,it analyzed the security of TSCT and did the effectiveness and performance tests.The results show that the overhead added by TCTS would not cause significant effect to the system.