Internet of Things (IoT) and Cyber-Physical Systems (CPS) are core technologies of next generation networks, and are the focus of research in both academia and industry. IoT/CPS has unique characteristics including heterogeneous integration, collaborative autonomy, and open interconnection that raise a number of issues for system security. These issues include seamless connection between security protocols, and preservation of user privacy. Developing novel security models,key technologies, and approaches is therefore critical in the development of IoT/CPS.This paper proposes an hierarchical security architecture based on threat analysis and security requirements and discusses key technologies associated with privacy preservation, secure control, and cross-network authentication.%物联网(IoT)和信息物理融合系统(CPS)作为下一代网络的核心技术,被业界广泛关注.与传统网络不同,IoT/CPS异构融合、协同自治、开放互连的网络特性带来了巨大的系统安全方面的挑战.挑战包括安全协议的无缝衔接、用户隐私保护等.研发新的安全模型、关键安全技术和方法是IoT/CPS发展中的重点.文章基于IoT/CPS安全需求和威胁模型,提出了一种层次化的安全体系结构,并针对隐私保护、跨网认证和安全控制等IoT/CPS的关键安全技术展开讨论.
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