Abstract
Wireless body area network is a low-power and high-security wireless communication protocol specially used in the medical environment. It requires a highly secure encryption algorithm to ensure that information related to a patient’s vital signs cannot be accessed by an attacker. In this article, a security scheme based on chaotic mapping for WBAN is proposed. This algorithm makes use of the hybrid chaotic system obtained by the combination of Logistic and Tent mapping as the sequence generator, which can select the effective precision according to the importance of the transmitted information to ensure the reasonable allocation of computing resources, including floating-point encryption, fixed-point 32-bit encryption, fixed-point 24-bit encryption, and fixed-point 16-bit encryption. In the randomness test of the sequence, it can be seen that the sequence autocorrelation coefficient generated by the combined chaotic system is close to 0 and has a flat power spectrum. At the same time, the sequences produced by the floating-point system and 32-bit fixed-point system have passed the NIST test, which proves that combined chaos overcomes the influence of sequence length and finite precision. Experimental analysis and performance comparison show that the proposed encryption algorithm has sufficient security to resist common attacks.
Highlights
With the rapid economic development and continuous improvement of living standards, inadequate medical services, and shortage of medical resources have become one of the critical factors affecting healthy life
The wireless body area network is a kind of intelligent medical monitoring device that integrates life science, sensor technology, communication technology, The associate editor coordinating the review of this manuscript and approving it for publication was Diep N
An image encryption algorithm based on PWLCM chaos and Logistic chaos was proposed in the paper [28], in which two chaotic maps retain 32-bit effective accuracy and operate in parallel
Summary
With the rapid economic development and continuous improvement of living standards, inadequate medical services, and shortage of medical resources have become one of the critical factors affecting healthy life. Inside WBAN, all data needs to be encrypted before being transmitted to the public network. Information transmitted in the WBAN needs to be encrypted using a secure encryption algorithm before it is transmitted to the public network. The data encryption schemes proposed for other communication systems are not suitable for WBANs [4]. Chaotic systems have the characteristics of sensitivity to initial values, ergodicity, pseudo-randomness, orbit unpredictability, etc These characteristics of chaos determine that digital chaos is suitable to be used in the encryption system as a pseudorandom number generator [6], [7]. The chaotic map can generate a sequence with pseudo-randomness through iteration, and obtain the ciphertext by mixing with the plaintext. The chaotic pseudo-random number generator combined with Logistic mapping and Tent mapping was used to generate sequences with different effective accuracies.
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