Symmetric Cryptography With a Chaotic Map and a Multilayer Machine Learning Network for Physiological Signal Infosecurity: Case Study in Electrocardiogram

IEEE Access

Jian-Xing Wu¹  Neng-Sheng Pai¹  Pi-Yun Chen¹  Chia-Hung Lin¹  Chao-Lin Kuo²  Chien-Ming Li³ 

[1] Department of Electrical Engineering, National Chin-Yi University of Technology, Taichung City, Taiwan;Department of Maritime Information and Technology, National Kaohsiung University of Science and Technology, Kaohsiung City, Taiwan;Department of Medicine of Chi Mei Medical Center, Division of Infectious Diseases, Tainan City, Taiwan;

关键词: Symmetric cryptography;    chaotic map;    general regression neural network;    optimization algorithm;    peak signal-to-noise ratio;   

DOI  :  10.1109/ACCESS.2021.3057586

来源: DOAJ

【 摘 要 】

Digital physiological signals in telecare medicine information systems have been widely applied in remote medical applications, such as telecare, tele-examination, and telediagnosis, via computer networking transmission or wireless communication. However, these medical records need to ensure authorization demands in the channel model for human body communication and remote medical servers and enhance the confidentiality, recoverability, and availability of transmission data. Hence, this study proposes a symmetric cryptography scheme with a chaotic map and a multilayer machine learning network (MMLN) to achieve physiological signal infosecurity. A chaotic pseudorandom number generator within specific control parameters can dynamically produce unordered sequence numbers to set the secret keys for a regular secret key update, thereby improving the security of private cipher codes. The chaotic map is quickly iterated to produce a pseudorandom key stream for real-time applications, and the private cipher codes are selected using the initial and specific control parameters at the data emitter and receiver ends. A general regression neural network is used to map the high-dimensional input-output pair of cipher codes for substitution and permutation processes. Its adaptive MMLN with an optimization algorithm can rapidly train the random cipher code protocol to achieve an encryptor and a decryptor for a regular encrypted communication. Using the Massachusetts Institute of Technology-Beth Israel Hospital (MIT-BIH) Arrhythmia Database, 100 electrocardiogram fragments are used to verify the proposed model, and the peak signal-to-noise ratio (PSNR) as a quantitative quality metric is used to evaluate the visual quality after encryption and decryption processes for further diagnosis applications. Experimental results show that the proposed scheme has a higher mean PSNR (35.26 ± 3.77 dB) and shorter mean executing time (0.16 ± 0.01 s) compared with traditional cryptography protocol schemes.

【 授权许可】

Unknown