Abstract
In recent years, the rapid development of computer science and technology brings health care into the information era. As a typical representation, wireless body area networks (WBANs) has also promoted the development of medical technology into a higher field. However, collecting data from users seriously affects personal privacy and security, that WBANs needs to overcome. In order to resolve the flaws of the existing secure authentication protocols in WBANs, we propose a lightweight implicit authentication protocol based on the Elliptic Curve Qu-Vantone (ECQV) algorithm. Moreover, we take advantage of the bidirectional key chain to design a group key management protocol between the personal digital assistance (PDA) and each of cluster head sensor nodes. The security and performance analysis show that our protocol can be performed with perfect forward security and backward security in data communication. In addition, the experimental simulation and theoretic analysis show that our protocol is more suitable for WBANs.
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