Secure Measuring and Controlling Methods Embedded SM4 Algorithm for Smart Home

摘要

Smart home based on the Internet of things is gradually changing our daily life, while it faces such serious problems as secure measuring and controlling to appliances and protection of end user's privacy. To guarantee the safety and reliability of smart home system, a secure measuring and controlling method embedded the domestic SM4 cryptographic algorithm for smart home is proposed in this paper, which integrates such secure mechanisms as access control based on the physical addresses of smartphone terminal or sensor nodes used in measuring and controlling operations, authentication based on the keys used in the encrypted transmission of instructions of measuring, and controlling and abnormal detection based on analysis of data. On such basis, the comparison in performances is carried out by secure measuring and controlling methods embedded domestic SM4 algorithm or typical AES one. The results of test suggest that the proposed secure measuring and controlling methods for smart home is feasible and effective, and the delay time consumed in information processing of the proposed method is only 2.5 % more than the currently pervading ones without secure mechanism. The rate of delay based on the SM4 algorithm is about 4 % less on average than the original AES one embedded in nodes, and SM4 algorithm owns independent intellectual property right with more flexible in realization of system.