Abdul Hanan Abdullah

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Wireless Body Sensor Networks (WBSNs) constitute a subset of Wireless Sensor Networks (WSNs) responsible for monitoring vital sign-related data of patients and accordingly route this data towards a sink. In routing sensed data towards sinks, WBSNs face some of the same routing challenges as general WSNs, but the unique requirements of WBSNs impose some more(More)
Text-based passwords are ubiquitous authentication system. This traditional authentication system is well- known for its flaws in the aspects of usability and security issues that bring problems to users. Hence, there is a need for alternative mechanism to overcome these problems. Graphical passwords, which consist of clicking or dragging activities on the(More)
An iterative method for estimating the optimum sample time (or simply window size) in self-similarity measurement of network traffic is introduced. The main purpose of this measurement is to identify anomaly in network traffic. When the network traffic is close to the self-similarity model, it is considered as normal while otherwise it is not. Since, this(More)
Usability plays important roles between tools and their users. To make a tool to be effective, it should allow intended users to achieve their tasks in the best way possible. The same principle applies to graphical password system. In order for this system to work, its users must be able to utilize it accurately and effectively. Graphical passwords, which(More)
The Telecare Medical Information System (TMIS) provides a set of different medical services to the patient and medical practitioner. The patients and medical practitioners can easily connect to the services remotely from their own premises. There are several studies carried out to enhance and authenticate smartcard-based remote user authentication protocols(More)
Grid scheduling process is a main factor that affects system performance. If the grid scheduler is enabled to selecting proper resources and determining order of tasks in queue, each task is executed without missing their deadline and extra faults; and consequently, the response time of job is decreased. Since the grid uses heterogeneous resources, the(More)
The wireless LAN has become increasingly more popular over the last decade. Applications such as audio, video and voice have become important to users in a network environment. As the need for these real-time applications has increased, the handover latency during the movement of the mobile node (MN) has become crucial. A large number of wireless access(More)
The life critical and real time medical application of Wireless Body Sensor Networks (WBSNs) requires the assurance of the demanded Quality of Service (QoS) both in terms delay and reliability. This paper proposes Critical Data Routing (CDR) that categorizes the sensory data packets as critical and noncritical data packets. Along with the heterogeneous(More)
Recently sink mobility has been exploited in numerous schemes to prolong the lifetime of wireless sensor networks (WSNs). Contrary to traditional WSNs where sensory data from sensor field is ultimately sent to a static sink, mobile sink-based approaches alleviate energy-holes issues thereby facilitating balanced energy consumption among nodes. In mobility(More)