Research On Lightweight Authentication Protocol For Medical Wireless Body Area Networks

Since life-related health information transmitted in WBANs is highly sensitive and private the authentication mechanism is a precondition to ensure integrity, confidentiality, availability and privacy of health information. Therefore the authentication mechanism in medical WBANs is the same important with their function and performance.The authentication mechanismin medical WBANs has been in depth discussed in the thesis, and main part of the finished works is as follows.(1) Designed a WBAN_OTP authentication protocol for WBANs applicationOn the foundation of analyzing requirement of security and performance of authentication protocol for medical WBANs, the designed WBAN_OTP authentication protocol synthesized advantages of the S/Key, SAS and SAS-2 in the aspect of lightweight and lower cost. The authentication requirement of multifactor, mutual, end-to-end, certificateless signature and robustness has been achieved by introducing device identity, system timestamp, ECC encryption and signature algorithm, and decreased number of hash operation as well as message transmission, but superiority of lightweight and lower cost is still hold.(2) Analyzed and proved security attributes of the WBAN_OTP authentication protocolIt has been analyzed in theory that the designed WBAN_OTP authentication protocol is provided with characteristics of multifactor, mutual, undeniability, unlinkability, end-to-end and resisting network attacks. It has been verified in formal method that the WBAN_OTP authentication protocol is provided with ability of resisting network attacks by the Coq 8.5 formal verification tool with high order logic.(3) Tested overhead occupation and energy consumption of the WBAN_OTP authentication protocolOverhead occupation of CPU and memory, energy consumption of CPU, OLED display screen and WiFi communication in the HTC Desire A8181 personal server have been respectively tested by the Emmagee and the Power Tutor tools. The experiment results indicated that the WBAN_OTP authentication protocol is superior to as a whole existing lightweight authentication protocols based on challenge and response and is an excellent candidate to secure medical WBANs.