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Articles 1 - 11 of 11
Full-Text Articles in Computer Engineering
On Modeling Eavesdropping Attacks In Wireless Networks, Xuran Li, Jianlong Xu, Hong-Ning Dai, Qinglin Zhao, Chak Fong Cheang, Qiu Wang
On Modeling Eavesdropping Attacks In Wireless Networks, Xuran Li, Jianlong Xu, Hong-Ning Dai, Qinglin Zhao, Chak Fong Cheang, Qiu Wang
Hong-Ning Dai
This paper concerns the eavesdropping attacks from the eavesdroppers’ perspective, which is new since most of current studies consider the problem from the good nodes’ perspective. In this paper, we originally propose an analytical framework to quantify the effective area and the probability of the eavesdropping attacks. This framework enables us to theoretically evaluate the impact of node density, antenna model, and wireless channel model on the eavesdropping attacks. We verify via extensive simulations that the proposed analytical framework is very accurate. Our results show that the probability of eavesdropping attacks significantly vary, depending on the wireless environments (such as …
Sptf: Smart Photo-Tagging Framework On Smart Phones, Hao Xu, Hong-Ning Dai, Walter Hon-Wai Lau
Sptf: Smart Photo-Tagging Framework On Smart Phones, Hao Xu, Hong-Ning Dai, Walter Hon-Wai Lau
Hong-Ning Dai
Smart phones, as one of the most important platforms for personal communications and mobile computing, have evolved with various embedded devices, such as cameras, Wi-Fi transceivers, Bluetooth transceivers and sensors. Specifically, the photos taken by a smart phone has the approximate or even equivalent image quality to that of a professional camera. As a result, smart phones have become the first choice for people to take photos to record their ordinary life. However, how to manage thousands of photos on a smart phone becomes a challenge. In this paper, we propose a new architecture in terms of Smart Photo-Tagging Framework …
End-To-End Latency Of A Fault-Tolerant Corba Infrastructure, Wenbing Zhao, Louise E. Moser, P. Michale Melliar-Smith
End-To-End Latency Of A Fault-Tolerant Corba Infrastructure, Wenbing Zhao, Louise E. Moser, P. Michale Melliar-Smith
Wenbing Zhao
This paper presents an evaluation of the end-to-end latency of a fault-tolerant CORBA infrastructure that we have implemented. The fault-tolerant infrastructure replicates the server applications using active, passive and semi-active replication, and maintains strong replica consistency of the server replicas. By analyses and by measurements of the running fault-tolerant infrastructure, we characterize the end-to-end latency under fault-free conditions. The main determining factor of the run-time performance of the fault-tolerant infrastructure is the Totem group communication protocol, which contributes to the end-to-end latency primarily in two ways: the delay in sending messages and the processing cost of the rotating token. To …
Understanding The Influence Of Blog On The Development Of Social Capital, Reza Vaezi, Gholamreza Torkzadeh, Jerry Cha-Jan Chang
Understanding The Influence Of Blog On The Development Of Social Capital, Reza Vaezi, Gholamreza Torkzadeh, Jerry Cha-Jan Chang
Reza Vaezi
The rapid use and application of blogs in diverse areas such as education, marketing, journalism, and human resource management in recent years underlines the need for a better understanding of the impact of this new technology on social capital. Social capital reflects the norm of reciprocity and the level of trust among individuals who connect, interact, and benefit from one another. Blog is expected to influence the extent and the scope of this interaction by providing new means of networking among people. This paper examines the relationship between blog use and social capital and reports on the results of an …
Multi-Channel Wireless Networks With Infrastructure Support: Capacity And Delay, Hong-Ning Dai, Raymond Chi-Wing Wong, Qinglin Zhao
Multi-Channel Wireless Networks With Infrastructure Support: Capacity And Delay, Hong-Ning Dai, Raymond Chi-Wing Wong, Qinglin Zhao
Hong-Ning Dai
No abstract provided.
A Gradient-Based Optimum Block Adaptation Ica Technique For Interference Suppression In Highly Dynamic Communication Channels, Wasfy B. Mikhael, Tianyu Yang
A Gradient-Based Optimum Block Adaptation Ica Technique For Interference Suppression In Highly Dynamic Communication Channels, Wasfy B. Mikhael, Tianyu Yang
Thomas Yang
The fast fixed-point independent component analysis (ICA) algorithm has been widely used in various applications because of its fast convergence and superior performance. However, in a highly dynamic environment, real-time adaptation is necessary to track the variations of the mixing matrix. In this scenario, the gradient-based online learning algorithm performs better, but its convergence is slow, and depends on a proper choice of convergence factor. This paper develops a gradient-based optimum block adaptive ICA algorithm (OBA/ICA) that combines the advantages of the two algorithms. Simulation results for telecommunication applications indicate that the resulting performance is superior under time-varying conditions, which …
Teaching Evaluation (Spring 2014), Hwee-Joo Kam
The Future Of National And International Security On The Internet, Maurice Dawson, Marwan Omar, Jonathan Abramson, Dustin Bessette
The Future Of National And International Security On The Internet, Maurice Dawson, Marwan Omar, Jonathan Abramson, Dustin Bessette
Maurice Dawson
Hyperconnectivity is a growing trend that is driving cyber security experts to develop new security architectures for multiple platforms such as mobile devices, laptops, and even wearable displays. The futures of national and international security rely on complex countermeasures to ensure that a proper security posture is maintained during this state of hyperconnectivity. To protect these systems from exploitation of vulnerabilities it is essential to understand current and future threats to include the laws that drive their need to be secured. Examined within this chapter are the potential security-related threats with the use of social media, mobile devices, virtual worlds, …
Eavesdropping Attacks In Wireless Ad Hoc Networks Under A Shadow Fading Environment, Xuran Li, Hong-Ning Dai, Qinglin Zhao, Qiu Wang
Eavesdropping Attacks In Wireless Ad Hoc Networks Under A Shadow Fading Environment, Xuran Li, Hong-Ning Dai, Qinglin Zhao, Qiu Wang
Hong-Ning Dai
This paper concerns the eavesdropping attacks in wireless ad hoc networks under a shadow fading environment. Most of previous studies have only concentrated on protecting the confidential communications at both the transmitters and the receivers and little attention has been paid on investigating the eavesdropping behaviors done by the malicious nodes. We therefore investigate the eavesdropping success rate of eavesdroppers equipped with various antenna models under various channels conditions, such as the path loss effect and the shadow fading effect. In particular, we formulate the eavesdropping attack problem with consideration of both simplistic directional antenna models and realistic antenna models. …
An Analytical Model On Eavesdropping Attacks In Wireless Networks, Xuran Li, Hong-Ning Dai, Qinglin Zhao
An Analytical Model On Eavesdropping Attacks In Wireless Networks, Xuran Li, Hong-Ning Dai, Qinglin Zhao
Hong-Ning Dai
This paper concerns the eavesdropping problem from the eavesdroppers’ perspective, which is new since most of previous studies only concentrate on the good nodes. We propose an analytical framework to investigate the eavesdropping attacks, taking account into various channel conditions and antenna models. Our extensive numerical results show that the probability of eavesdropping attacks heavily depends on the shadow fading effect, the path loss effect and the antenna models; particularly, they imply that using directional antennas at eavesdroppers can increase the probability of eavesdropping attacks when the path loss effect is less notable. This study is helpful for us to …
Student Feedback (Spring 2014), Hwee-Joo Kam