| Driven by the rapid development of Internet of Things(IoT),especially with the expansion of scale and the large number of applications,wireless medical sensor networks(WMSNs)are becoming a promising technology.However,the development of wireless medical sensor network can not ignore the various threats faced by the patient's privacy security.The problem of limited computing resources due to relatively low cost of sensor nodes,how to improve data security and improve the efficiency of encryption algorithms are The main content of this study.This paper researches the encryption algorithm of WMSNs,proposes improvement in principle,simplifies the high complexity of traditional cryptographic algorithms,enhances the security intensity of wireless medical sensor network node communication,and improves the operating efficiency of node communication encryption.While reducing the calculation of the encryption algorithm,it also sacrifices some storage space.This article has influenced the application of lightweight encryption technology in wireless medical sensor networks and other scenarios.The main research content of this paper is as follows:(1)The development of the wireless medical sensor network and its basic structure were studied by consulting relevant literature at home and abroad.By analyzing the application characteristics of wireless medical sensor networks,it is pointed out that there are hidden dangers in the field of data security.The existing symmetric key algorithms and asymmetric key technologies are briefly introduced,and the practical significance of the research on this subject is proved.(2)Based on the principle of traditional cryptographic algorithms,the mainstream cryptographic algorithms and common operating modes of block ciphers are introduced.Analyze and study the improved encryption algorithm put forward by the previous people,and sum up these solutions.(3)For this application scenario,the technical data collection system for medical care data is introduced.For example,the data transmission method in the system,the weak links in the system are discovered through the packet-capturing tools and analysis protocol format—data security risks,pointing out that for customization The need for cryptographic algorithm requirements.(4)Choose a representative AES encryption algorithm and conduct corresponding analysis and research.From this,the links that affect the complexity of cryptographic algorithms are discovered.Optimize the links that need a lot of calculations to design a lightweight block cipher algorithm suitable for this application scenario.And encrypt data at the information source,effectively improve the security strength and operating efficiency,and achieve a complete solution for this application scenario.(5)For this application scenario,we mainly carry out many experimental tests on the improved algorithm.The performance indicators of the software and hardware platform and the horizontal-vertical comparison algorithm of this experiment are given.Based on the in-depth analysis,research and improvement of the AES encryption algorithm,a lightweight lightweight advanced encryption algorithm(LAES)is proposed.The main contributions and improvements of this article are as follows:(1)Reconstruction of the AES S-box design and testing of related security indicators;(2)The original algorithm for 10 rounds of encryption was tested and optimized to 8 rounds;(3)Simplify the round function of the encryption process of the original algorithm,effectively reduce the computational complexity through the global look-up table method,and improve the operation efficiency of the algorithm;(4)Testing the key parameters such as memory usage and running time of AES and improved AES through MDK5 and other experimental platforms,and then using statistical cryptanalysis methods such as exhaustive and differential analysis to verify that the design algorithm is in line with the high Features such as security strength,meet the encryption communication characteristics of WMSNs. |
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