Research On Data Encryption Algorithm Of Power Internet Of Things Based On Complex Chaotic System

As the world has accelerated into the digital era with the "Internet of Everything" as a distinctive feature,the Power Internet of Things(PIo T),the new generation of information and communication technology,has expanded the scope of users from people to any object.while realizing the deep integration with the Internet,there may be loopholes in information collection as well as communication.Once it is maliciously attacked by hackers,it may lead to the loss or tampering of data.And it will seriously affect the normal operation of basic equipment and cause alarming economic losses.Therefore,information security is particularly important.In the field of information security,cryptography is the core technology.Without cryptography,there is no information security.There are a natural connection and structural similarity between Chaos and cryptography.The sensitivity of chaotic systems to initial conditions and parameters corresponds to the diffusion property of traditional encryption algorithms;while the pseudo-random property of chaotic sequences corresponds to the dislocation property of traditional encryption algorithms,and these properties can meet the requirements of encryption.Compared with chaotic systems,complex chaotic systems have more complex dynamics,which make them widely used in encryption and secure communication.In addition,the PIo T require a high level of real-time data transmission.Therefore,this thesis focuses on the design and characterization of complex chaotic systems,the design of chaotic encryption algorithms and their performance analysis,with the goal of meeting the information security and real-time requirements of the PIo T.The main contents and innovations of this thesis are as follows.(1)Analysis and Study of Three New Complex Chaotic Systems and Their CharacteristicsFirstly,based on Chua’s circuit,a seven-dimensional complex chaotic system(7D-CCS)is proposed by introducing a cubic memristor.Secondly,a nine-dimensional complex chaotic system(9D-CCS)is proposed through the complex Chen system and quaternion.Finally,a thirteen-dimensional complex chaotic system(13D-CCS)is introduced.And the systems are analyzed from different perspectives such as chaotic attractor diagram,Lyapunov exponential diagram,bifurcation diagram,0-1 test and complexity analysis.(2)Research on Information Security of the PIo TAn Arnold encryption algorithm based on 7D-CCS is designed to meet the information security requirements of the PIo T.Arnold is a two-dimensional permutation chaotic mapping,which is widely used in the field of data encryption to increase the randomness and security of encryption algorithms by disrupting the order of data.In addition,Arnold permutation is an irreversible process,even if a malicious attacker learns the encryption algorithm,it is difficult to restore the data by reverse calculation.In this thesis,the system parameters of Arnold are not fixed and their values rely on chaotic sequences generated by 7D-CCS,which can further increase the randomness of the algorithm and improve the security of the encryption algorithm.Simulation experiments and performance analysis test results show that this algorithm is superior to other algorithms in terms of security.(3)Research on Real Time Encryption of the PIo TTwo chaotic encryption algorithms focused on real-time encryption are designed,one of which is a partial encryption algorithm based on 9D-CCS and DNA encoding.DNA encoding refers to an encryption technique that uses DNA sequences as keys.Due to the high complexity and randomness of DNA sequences,using DNA coding can improve the security of encryption.In addition,the algorithm ensures real-time encryption by encrypting only sensitive data regions.Another block encryption algorithm based on 13D-CCS is to remove the complicated encoding process and the operation of encrypting only sensitive data area in the design idea of the above algorithm,and only keep the basic diffusion operation to ensure the real-time encryption.At the same time,the chaotic system that generates encrypted sequences is replaced by 13D-CCS instead of 9D-CCS,increasing the key space,and thereby ensuring that the algorithm has a certain degree of security.In summary,this thesis focuses on the information security and real-time encryption requirements of PIo T,proposes three new complex chaotic systems.And construct the Arnold encryption algorithm based on 7D-CCS,the partial encryption algorithm based on 9D-CCS and DNA coding,and the block encryption algorithm based on 13D-CCS.They provide a new idea for the research of chaotic encryption algorithms in the PIo T.