A Hybrid Chaotic Encryption Scheme for Wireless Body Area Networks

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 paper, 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 floatingpoint 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.

Design and Enhancing Security Performance of Image Cryptography System Based on Fixed Point Chaotic Maps Stream Ciphers in FPGA

“…ZHOU, Minjun et al in 11 presented an image encryption model to extend advanced encryption standard algorithm (AES) to enhance the algorithm ability to brute force attack with 2 128 key space. Quantum image encryption-based Henon chaos mapping presented in 12 with 10 -15 sensitivity level. While the key space for hybrid chaotic scheme presented in 13 was 2 122 for fixed point chaotic parameters.…”

Certificateless Algorithm for Body Sensor Network and Remote Medical Server Units Authentication over Public Wireless Channels

“…As explained above, all this can have devastating effects on the side of the patients. Although many authentication protocols [12] have been developed to offer security and privacy in communication networks, their deployment in WBANs is problematic due to the resource constrained nature of body sensors [13,14] . These limitations manifest themselves in form of computation abilities, battery power and memory.…”