片上系统(System on Chip,SoC)芯片会针对产品固件进行SM2签名和验签,以确定产品固件的合法性,但现有技术中产品固件未对芯片进行身份鉴别,由于无法确定芯片是否合法,产品固件和数据的安全性得不到保护。基于SM2算法,针对SoC安全芯片中...片上系统(System on Chip,SoC)芯片会针对产品固件进行SM2签名和验签,以确定产品固件的合法性,但现有技术中产品固件未对芯片进行身份鉴别,由于无法确定芯片是否合法,产品固件和数据的安全性得不到保护。基于SM2算法,针对SoC安全芯片中产品固件导入过程,实现了基于国产密码SM2算法的芯片鉴别固件、固件鉴别芯片的双向身份鉴别技术。方案安全性高、可实现性强,对SoC安全芯片对引导程序、产品固件进行双向身份鉴别有普遍现实借鉴意义。所设计的SM2模块,具有芯片面积小、电路设计难度小、CPU操作简单、适用于嵌入式SoC安全芯片等优点。展开更多
To accurately capture the measurement of bus reliability and evaluate whether the transit system is properly operated an evaluation framework is established to assess the reliability of the transit system from differe...To accurately capture the measurement of bus reliability and evaluate whether the transit system is properly operated an evaluation framework is established to assess the reliability of the transit system from different stratifications including stops routes and network levels.The bus operation data of the Hefei city is analyzed as a case study.Comparison is conducted to show the improvement made by using the advanced method and an example of adding exclusive bus lanes to the existing bus route is provided. The proposed advanced method can avoid the shortcomings of the traditional method.For example the value of the reliability using the traditional coefficient of variation CV is not between 0 and 1 and the value of reliability can decrease with the increase in the transit headway etc. The case study shows that the advanced method can represent the real operation condition of the transit system and can be used to evaluate the transit headway reliability more reasonably.展开更多
文摘片上系统(System on Chip,SoC)芯片会针对产品固件进行SM2签名和验签,以确定产品固件的合法性,但现有技术中产品固件未对芯片进行身份鉴别,由于无法确定芯片是否合法,产品固件和数据的安全性得不到保护。基于SM2算法,针对SoC安全芯片中产品固件导入过程,实现了基于国产密码SM2算法的芯片鉴别固件、固件鉴别芯片的双向身份鉴别技术。方案安全性高、可实现性强,对SoC安全芯片对引导程序、产品固件进行双向身份鉴别有普遍现实借鉴意义。所设计的SM2模块,具有芯片面积小、电路设计难度小、CPU操作简单、适用于嵌入式SoC安全芯片等优点。
基金The National Basic Research Program of China(973 Program)(No.2012CB725402)the National Natural Science Foundation of China(No.51208099,50978057)
文摘To accurately capture the measurement of bus reliability and evaluate whether the transit system is properly operated an evaluation framework is established to assess the reliability of the transit system from different stratifications including stops routes and network levels.The bus operation data of the Hefei city is analyzed as a case study.Comparison is conducted to show the improvement made by using the advanced method and an example of adding exclusive bus lanes to the existing bus route is provided. The proposed advanced method can avoid the shortcomings of the traditional method.For example the value of the reliability using the traditional coefficient of variation CV is not between 0 and 1 and the value of reliability can decrease with the increase in the transit headway etc. The case study shows that the advanced method can represent the real operation condition of the transit system and can be used to evaluate the transit headway reliability more reasonably.
