Network information poses great threats from malicious attacks due to the openness and virtuality of network structure. Traditional methods to ensure information security may fail when both integrity and source authentication for information are required. Based on the security of data broadcast channel, a novel Trusted Computing Model (TCM) of network security authentication is proposed to enhance the security of network information. In this model, a method of Uniform content locator security Digital Certificate (UDC), which is capable of fully and uniquely index network information, is developed. Standard of MPEG-2 Transport Streams (TS) is adopted to pack UDC data. Additionally, a UDC hashing algorithm (UHA512) is designed to compute the integrity and security of data information. Experimental results show that the proposed model is feasible and effective to network security authentication.

Security architecture is the key problem of each network construction, Internet of things (IoT) is no exception. Firstly, existing research results in relation to security architecture of IoT are summarized. Then, on the basis of the analysis of the IoT security problem, this paper discusses the network security service requirements of IoT. Finally, a novel hierarchical and flexible secure architecture for IoT is proposed, which includes the security perception layer, security network layer and security application layer. Meanwhile, it involves security services entity and security management entity. The security architecture can provide strong technical support for security construction of IoT.