随着互联网技术的完善和云计算技术的兴起,物联网的实现也变得触手可及。而物联网的建设与发展必将面临安全因素的制约。本文概述了物联网各层级的框架结构,并对各层安全策略进行初步的探讨,总结了各层面临的安全威胁及相关的安全技术。 With the improvement of Internet technology and the rise of cloud computing technology, the realization of Internet of Things has also become within reach. The construction and development of Internet of Things will face the constraints of security. This article provides an overview of the IoT architecture at all levels and a preliminary discussion of security policies at all levels. It summarizes the security threats and related security technologies at all levels.