为保障铁路系统的信息安全,文章提出一种铁路运行环境下可信根实体(Entity of Root of Trust,ERT)的软件化技术,在内核中实现强制访问控制功能,通过操作系统内核的修改或扩展,实现更为细粒度和强大的权限管理。同时考虑到轻量级场景下...为保障铁路系统的信息安全,文章提出一种铁路运行环境下可信根实体(Entity of Root of Trust,ERT)的软件化技术,在内核中实现强制访问控制功能,通过操作系统内核的修改或扩展,实现更为细粒度和强大的权限管理。同时考虑到轻量级场景下部分设备存在计算能力弱、存储空间有限和电源供应不稳定等问题,提出一种轻量级可信计算体系,最大程度满足可信计算要求。通过实施内核级的强制访问控制和轻量级的可信计算体系改造,缓解未知风险对关键信息基础设施的威胁,为铁路系统的安全性提供保障。展开更多
To build a trusted platform based on Trusted Computing Platform Alliance(TCPA)' s recommendation, we analyze the integrity mechanism for such a PC platfoim in this paper.By combinning access control model with inf...To build a trusted platform based on Trusted Computing Platform Alliance(TCPA)' s recommendation, we analyze the integrity mechanism for such a PC platfoim in this paper.By combinning access control model with information flow model, we put forwarda combinedprocess-based lattice model to enforce security This moelel creates a trust chain by which we canmanage a series of processes from a core root of trust module to some other application modules Inthe model, once the trust chain is created andmanaged cor-rectly, the integrity of the computer'shardware and sofware has bctn maintained, so does the confidentiality and authenticity. Moreover, arelevant implementation of the model is explained.展开更多
文摘为保障铁路系统的信息安全,文章提出一种铁路运行环境下可信根实体(Entity of Root of Trust,ERT)的软件化技术,在内核中实现强制访问控制功能,通过操作系统内核的修改或扩展,实现更为细粒度和强大的权限管理。同时考虑到轻量级场景下部分设备存在计算能力弱、存储空间有限和电源供应不稳定等问题,提出一种轻量级可信计算体系,最大程度满足可信计算要求。通过实施内核级的强制访问控制和轻量级的可信计算体系改造,缓解未知风险对关键信息基础设施的威胁,为铁路系统的安全性提供保障。
基金Supported by the National Natural Science Foun dation of China (90104005) and the National High Technology Re search and Development Program of China ( 863 Program )(2002AA141051)
文摘To build a trusted platform based on Trusted Computing Platform Alliance(TCPA)' s recommendation, we analyze the integrity mechanism for such a PC platfoim in this paper.By combinning access control model with information flow model, we put forwarda combinedprocess-based lattice model to enforce security This moelel creates a trust chain by which we canmanage a series of processes from a core root of trust module to some other application modules Inthe model, once the trust chain is created andmanaged cor-rectly, the integrity of the computer'shardware and sofware has bctn maintained, so does the confidentiality and authenticity. Moreover, arelevant implementation of the model is explained.
