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History-Based Backoff Algorithms for Mobile Ad Hoc Networks

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Journal of Computer and Communications 2016年第11期4卷 37-46页

作者： saher manaseer Fatima Badwan Department of Computer Science King Abdullah II School for Information Technology The University of Jordan Amman Jordan

Mobile Ad hoc Network (MANET) is a wireless network consisting of mobile devices (laptops, smart phones, etc.) that move and communicate with each other without the use of any existing network infrastructure or centralized server to avoid collisions which have negative effects on the performance of the network. Access to the shared media is controlled by a Backoff algorithm that is a part of the Media Access Protocol. In this paper, we improve the History Based Probabilistic Backoff (HPPB) algorithm by modifying the increment/decrement behavior of the Contention Window to introduce History Based Increment Backoff (HBIB) algorithm which outperforms HBPB in terms of throughput and end-to-end delay with various numbers of nodes and different traffic loads.

关键词： Media Access Protocol Backoff Mobile Ad Hoc Networks

Load Balancing for Hex-Cell Interconnection Network

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International Journal of Communications, Network and System Sciences 2016年第4期9卷 98-116页

作者： saher manaseer Ahmad Alamoush Osama Rababah Department of Computer Science King Abdullah II School for Information Technology The University of Jordan Amman Jordan Department of Business Information Technology King Abdullah II School for Information Technology The University of Jordan Amman Jordan

The hex-cell is one of the interconnection networks used for parallel systems. The main idea of the hex-cell is that there are hexagon cells that construct the network;each one of those cells has six nodes. The performance of the network is affected by many factors one of the factors as load balancing. Until the moment of writing of this paper, there is no load balancing algorithm for this network. The proposed algorithm for dynamic load balancing on hex-cell is based on Tree Walking Algorithm (TWA) for load balancing on tree interconnection network and the ring all to all broadcast.

关键词： Hex-Cell Load Balancing Tree Walking

Automatic Test Data Generation for Java Card Applications Using Genetic Algorithm

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Journal of Software Engineering and Applications 2015年第12期8卷 603-616页

作者： saher manaseer Warif Manasir Mohammad Alshraideh Nabil Abu Hashish Omar Adwan Department of Computer Science The University of Jordan Amman Jordan Al Israa University Amman Jordan Department of Computer Information Systems The University of Jordan Amman Jordan

The main objective of software testing is to have the highest likelihood of finding the most faults with a minimum amount of time and effort. Genetic Algorithm (GA) has been successfully used by researchers in software testing to automatically generate test data. In this paper, a GA is applied using branch coverage criterion to generate the least possible set of test data to test JSC applications. Results show that applying GA achieves better performance in terms of average number of test data?generations, execution time, and percentage of branch coverage.

关键词： Software Testing Genetic Algorithm Java Smart Card

Web Threats Detection and Prevention Framework

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Communications and Network 2016年第3期8卷 170-178页

作者： Osama M. Rababah Ahmad K. Al Hwaitat saher Al manaseer Hussam N. Fakhouri Rula Halaseh Department of Business Information Technology The University of Jordan Amman Jordan Department of Computer Science The University of Jordan Amman Jordan

The rapid advancement in technology and the increased number of web applications with very short turnaround time caused an increased need for protection from vulnerabilities that grew due to decision makers overlooking the need to be protected from attackers or software developers lacking the skills and experience in writing secure code. Structured Query Language (SQL) Injection, cross-site scripting (XSS), Distributed Denial of service (DDos) and suspicious user behaviour are some of the common types of vulnerabilities in web applications by which the attacker can disclose the web application sensitive information such as credit card numbers and other confidential information. This paper proposes a framework for the detection and prevention of web threats (WTDPF) which is based on preventing the attacker from gaining access to confidential data by studying his behavior during the action of attack and taking preventive measures to reduce the risks of the attack and as well reduce the consequences of such malicious action. The framework consists of phases which begin with the input checking phase, signature based action component phase, alert and response phases. Additionally, the framework has a logging functionality to store and keep track of any action taking place and as well preserving information about the attacker IP address, date and time of the attack, type of the attack, and the mechanism the attacker used. Moreover, we provide experimental results for different kinds of attacks, and we illustrate the success of the proposed framework for dealing with and preventing malicious actions.

关键词： SQL Injection XSS DDoS Attack Suspicious User Behavior Web Applications