1. Fourth Department, Information Engineering University, Zhengzhou 450001, China 2. School of Computer and Communication Engineering, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China 3. School of Cyber Engineering, Xidian University, Xi’an 710071, China
Wireless body area networks (WBANs) guarantee timely data processing and secure information preservation within the range of the wireless access network, which is in urgent need of a new type of security technology. However, with the speedy development of hardware, the existing security schemes can no longer meet the new requirements of anonymity and lightweight. New solutions that do not require complex calculations, such as certificateless cryptography, attract great attention from researchers. To resolve these difficulties, Wang et al. designed a new authentication architecture for the WBANs environment, which was claimed to be secure and efficient. However, in this paper, we will show that this scheme is prone to ephemeral key leakage attacks. Further, based on this authentication scheme, an anonymous certificateless scheme is proposed for lightweight devices. Meanwhile, user anonymity is fully protected. The proposed scheme is proved to be secure under a specific security model. In addition, we assess the security attributes our scheme meets through BAN logic and Scyther tool. The comparisons of time consumption and communication cost are given at the end of the paper, to demonstrate that our scheme performs prior to several previous schemes.
The real identity of data collection device (application server)
The full public keys of
The full private key of
The session key established between and
Tab.3
Fig.4
Fig.5
Fig.6
Security attribute
[20]
[22]
[25]
[26]
[27]
[28]
Ours
Forward security
Mutual authentication
Secure key agreement
Anonymity and un-traceability
Resistance to impersonation attack
Resistance to man-in-the-middle attack
Resistance to ephemeral key leakage attack
Tab.4
Scheme
Computation cost
Communication cost
Jia et al.’s [20]
ms
=672 bits
RC2PAS [22]
ms
=1312 bits
Shan et al.’s [25]
ms
=960 bits
Wang et al.’s [26]
ms
=672 bits
Rana et al.’s [27]
ms
=1152 bits
Xu et al.’s [28]
ms
=992 bits
Our scheme
ms
=672 bits
Tab.5
Fig.7
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