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Today there is considerable interest for making use of the latest technological advancements for several healthcare applications. However, there are several challenges for making use of different technologies for healthcare applications. In particular, there is a need to ensure that the healthcare related services receive priority during events, such as legitimate failures of devices, congestion, and attacks in the networks. In this paper, we discuss some of the requirements for making use of technology for healthcare applications and propose techniques for secure monitoring of patients with wandering behavior in a hospital or elderly care environment. One of the aims of our work is to use technology for secure monitoring of patients with wandering behavior to keep them away from danger, or detect if the behavior of the patient violates the policies of the hospital, or even violates privacy policies of other patients. Our approach makes use of software defined networking (SDN), Wireless LAN (WLAN), and wearable devices for the patients. Our approach incurs low cost since WLAN is widely deployed. However, there are some challenges for making use of WLAN for monitoring dementia patients, since it is primarily used for accessing the Internet and its open nature is vulnerable to different types of security attacks. Hence we make use of SDN to solve some of these challenges and provide priority for the monitoring services. We have developed a security application for an SDN controller that can be used to enforce fine granular policies for communication between the hosts, real time location tracking of the patients, and deal with attacks on the hospital networks. The policy-based security enforcement helps to differentiate healthcare related traffic from other traffic and provide priority to the healthcare traffic. The real time location tracking detects wandering by patients and if necessary can raise alarms to the staff. The attack detection component makes use of attack signatures and behavior-based intrusion detection to deal with attacks on hospital networks. We will also present the prototype implementation of our model using ONOS SDN controller and OpenFlow Access Points.

Secure Monitoring of Patients With Wandering Behavior in Hospital Environments