Key management in wireless Body Area Network

The miniaturization of wireless sensors and medical devices have empowered the extension of Wireless Body Area Networks (WBANs) and E-Health care systems. However, in WBANs, wireless communications are exposed to a variety of passive and active security attacks. As a result, protection of privacy and integrity of the collected data from WBANs is of high importance. To mitigate these problems, numerous key management and security solutions have been designed for the WBANs in the literature, that this paper provides a comprehensive analysis of them. It mainly classifies the key management methods into the biometric and non-biometric categories and illustrates their main capabilities in detail. Furthermore, it provides a complete comparison of the security schemes and highlights their features and limitations.