Abstract

Wireless sensor network (WSN) has wide potential application in various fields such as military, agricultural and healthcare. WSNs need effective security mechanisms because they are deployed in hostile unattended environments. Various user authentication protocols were proposed for WSNs security. However, there are many previous protocols that have various security vulnerabilities including masquerading, password guessing attack and traceability and they do not provide anonymity and unlinkability. Especially, unlinkability is one of important privacy factor in WSNs environment that an attacker cannot adequately distinguish whether the elements are related or not. This paper proposes an unlinkable user authenticated key agreement protocol (UAKA) for multi-gateway WSNs that could achieve desirable security and privacy attributes. The security of UAKA is based on the one-wayness of hash function and secrecy of symmetric key cryptosystem. UAKA supports dynamic node addition and user friendly password change. The security and privacy of UAKA was proven based on BAN logic and informal security analysis. It preserves all the original merits of the related protocols and provides security and privacy. However, UAKA has a bit computational overhead compared to the related protocols due to providing security and privacy. The Analysis results shows that all the related protocols are linkable while UAKA is anonymous and unlinkable and it also provides enough security and privacy to all active and passive attacks

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School	: School of Natural and Applied Sciences
Issued Date	: 2023

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