Wireless Sensor Networks in Support of E-Health Applications
Nowadays, with the smart device developing and life quality improving, people’s requirement of real-time, fast, accurate and smart health service has been increased. As the technology advances, E-Health Care concept has been emerging in the last decades and received extensive attention. With the help of Internet and computing technologies, a lot of E-Health Systems have been proposed that change traditional medical treatment mode to remote or online medical treatment. Furthermore, due to the rapidly development of Internet and wireless network in recent years, many enhanced E-Health Systems based on Wireless Sensor Network have been proposed that open a new research field. This research work has reviewed the E-Health Care System development and limitations in recent years and proposes a novel E-Health System based on Wireless Sensor Network by taking the advantage of the latest technologies. The proposed E-Health System is a wireless and portable system, which consists of the Wireless E-Health Gateway and Wireless E-Health Sensor Nodes. The system has been further enhanced by Smart Technology that combined the advantages of the smart phone. The proposed system has change the mechanisms of traditional medical care and provide real-time, portable, accurate and flexible medical care services to users. With the E-Health System wieldy deployed, it requires powerful computing center to deal with the mass health record data. Cloud technology as an emerging technology has applied in the proposed system. This research has used Amazon Web Services (AWS) – Cloud Computing Services to develop a powerful, scalable and fast connection web service for proposed E-Health Management System. The security issue is a common problem in the wireless network, and it is more important for E-Health System as the personal health data is private and should be safely transferred and storage. Hence, this research work also focused on the cryptographic algorithm to reinforce the security of E-Health System. Due to the limitations of embedded system resources, such as: lower computing, smaller battery, and less memory, which cannot support modem advance encryption standard. In this research, Rivest Cipher Version 5 (RC5) as the simple, security and software or hardware deployable encryption algorithm has been in-depth studied. As the Logistic map has good cryptographic algorithm properties, like unpredictable, random, and sensitive to the initial parameters it has been investigated. In this thesis, an enhanced RC5 cryptographic algorithm has been proposed that uses 1-D Logistic mapping in the random sub-key generation during each encryption round, which increases the unpredictability significantly. In addition, an effective cipher feedback model has been combined to further increase the cipher security. After in-depth research of the 1-D Logistic map, a 2-D Logistic map has been proposed that provides more complex chaotic behaviors than the 1-D Logistic map and further improves the security. Another novel RC5 cryptographic algorithm with 2-D Logistic map has been proposed in this thesis. The proposed algorithm uses a 2-D Logistic map to generate the sub-key and modified RC5 operations to encrypt data. Appropriate experiments have been carried out to evaluate the performance. The results show the proposed algorithms are better than standard RC5 or other modified RC5. The contributions and innovation of this research project are summarized: • Build up a Wireless E-Health Care System based on Wireless Sensor Network. • Create the Cloud Management System for E-Health Care System. • Proposed RC5 cryptographic algorithms based on Logistic Map to increase the randomness and security of cipher data.