Lawrence O. Kehinde

A User Identity Management Protocol for Cloud Computing Paradigm

Cloud computing paradigm is a service oriented system that delivers services to the customer at low cost. Cloud computing needs to address three main security issues: confidentiality, integrity and availability. In this paper, we propose user identity management protocol for cloud computing customers and cloud service providers. This protocol will authenticate and authorize customers/providers in other to achieve global security networks. The protocol will be developed to achieve the set global security objectives in cloud computing environments. Confidentiality, integrity and availability are the key challenges of web services’ or utility providers. A layered protocol design is proposed for cloud computing systems, the physical, networks and application layer. However, each layer will integrate existing security features such as firewalls, NIDS, NIPS, Anti-DDOS and others to prevent security threats and attacks. System vulnerability is critical to the cloud computing facilities; the proposed protocol will address this as part of measures to secure data at all levels. The protocol will protect customers/cloud service providers’ infrastructure by preventing unauthorized users to gain access to the service/facility.

Architectural model for Wireless Peer-to-Peer (WP2P) file sharing for ubiquitous mobile devices

This paper presents an architectural model for Wireless Peer-to-Peer (WP2P) file sharing system for ubiquitos mobile devices. File sharing is one of the rationales for computer networks with increasing demand for file sharing applications and technologies in small and large enterprise networks and on the Internet. With the popularity of mobile phones in day-to-day activities, P2P file sharing in mobile phones is highly desirable, especially in 2/2.5G mobile networks. The proposed model is based on a hybrid or semi centralized architecture with the central database server acting as an interface between the mobile devices. The P2P communication model employs the Short Messaging Service (SMS) and Multimedia Messaging Service (MMS) as the messaging medium. The mobile phone initiates a search for a particular file on the mobile P2P network using a General Packet Radio Service (GPRS) connection. The database replies the “searcher” mobile phone with a list of all the available files and the details of the mobile phones that have them. Using this information, the requesting mobile phone makes a SMS connection to any of the phones provided by the database server. The mobile phone with the file then sends it to the requesting mobile phone using the MMS. We present an architectural model using mobile proxy, SMS and MMS, for a mobile P2P network for 2/2.5G networks despite operator constraints.

A Load Balancing Policy for Distributed Web Service

The proliferation of web services; and users appeal for high scalability, availability and reliability of web servers to provide rapid response and high throughput for the Clients’ requests occurring at anytime. Distributed Web Servers (DWSs) provide an effective solution for improving the quality of web services. This paper addresses un-regulated jobs/tasks migration among the servers. Considering distributed web services with several servers running, a lot of bandwidth is wasted due to unnecessary job migration. Having considered bandwidth optimization, it is important to develop a policy that will address the bandwidth consumption while loads/tasks are being transferred among the servers. The goal of this work is to regulate this movement to minimize bandwidth consumption. From literatures, little or no attention was given to this problem, making it difficult to implement some of these policies/schemes in bandwidth scarce environment. Our policy “Cooperative Adaptive Symmetrical Initiated Dynamic/Diffusion (CASID)” was developed using Java Development Environment (JADE) a middle ware service oriented environment which is agent-based. The software was used to simulate events (jobs distribution) on the servers. With no job transfer allowed when all servers are busy, any over loaded server process jobs internally to completion. We achieved this by having two different agents; static cognitive agents and dynamic cognitive agents. The results were compared with the existing schemes. CASID policy outperforms PLB scheme in terms of response time and system throughput.

Proxy server experiment and the changing nature of the web

The use of proxy server could help provide adequate access and response time to large numbers of World Wide Web (WWW) users requesting previously accessed page. While some studies have reported performance increase due to the use of proxy servers, a study reported performance decrease associated with the use of proxy server. Due to lack of recently published scholarly article that test the performance of proxy server, we carry out an in-depth study of the behavior of a proxy server over a six month period. The result of the study showed that hit ratios of the proxy servers range between 21% to 39% and over 70% of web pages are dynamic. The study indicates the effectiveness of the proxy server and helps evaluate the tradeoff between money spent on higher bandwidth lower latency connections, versus the cost/performance of using a caching intermediary.

A distributed intrusion detection scheme for wireless sensor networks

The task of Intrusion Detection Systems (IDS) in Wireless Sensors Networks (WSNs) is to monitor sensor network systems; detecting possible intrusions in the WSNs environment, alerting users after intrusions had been detected and reconfiguring the network if possible. In this study a Distributed IDS for WSNs was developed. Distributed IDS is implemented using TMote sky wireless sensor for testing and simulation over specified parameters. For efficient monitoring of the WSNs, the proposed system employs Mobile Agents (MAs) that can communicate with other sensors and move from one Base Station (BS) to another in order to enhance intrusion detection and prevention. Comparative analysis of the result is studied based on three major parameters: energy consumption, response time and detection accuracy. The result of the study shows better performance.

A Scalable Architecture for Network Traffic Monitoring and Analysis Using Free Open Source Software

The lack of current network dynamics studies that evaluate the effects of new application and protocol deployment or long-term studies that observe the effect of incremental changes on the Internet, and the change in the overall stability of the Internet under various conditions and threats has made network monitoring challenging. A good understanding of the nature and type of network traffic is the key to solving congestion problems. In this paper we describe the architecture and implementation of a scalable network traffic moni-toring and analysis system. The gigabit interface on the monitoring system was configured to capture network traffic and the Multi Router Traffic Grapher (MRTG) and Webalizer produces graphical and detailed traffic analysis. This system is in use at the Obafemi Awolowo University, IleIfe, Nigeria; we describe how this system can be replicated in another environment.

An iLab for Teaching Advanced Logic Concepts With Hardware Descriptive Languages

One of the more interesting approaches to teaching advanced logic concepts is the use of online laboratory frameworks to provide student access to remote field-programmable devices. There is as yet, however, no conclusive evidence of the effectiveness of such an approach. This paper presents the Advanced Digital Lab, a remote laboratory based on the batched MIT iLab Architecture. With a hardware system under test designed around an Altera EP2C20F484 field-programmable gate array (FPGA), the lab makes it possible for students to implement finite-state machines on a field-programmable device using VHDL. A study was carried out to evaluate the lab. Study results indicated that the Advanced Digital Lab is an effective pedagogical tool. Some observations drawn from the results of the study are also discussed; these may have far-reaching implications for the argument about the effectiveness of the general class of remote laboratories. An important contribution of this paper is that it provides a template for the proper evaluation of remote laboratories along multiple dimensions, particularly those of pedagogy, logistics, and cost.

Simulation of a cyclic multicast proxy server

The exponential growth of the World Wide Web (WWW) users has made the deployment of proxy servers popular on a network with limited resources. WWW clients perceive better response time, improved performance and speed when response to requested pages are served from the cache of a proxy server, resulting in faster response times after the first document fetch. This work focuses on the development of a cyclic multicast proxy server through the use of a cyclic multicast engine for the delivery of popular web pages from the proxy server cache to increasingly large users under limited server capacity and network resources. The cyclic multicast technique would be more efficient for the delivery of highly requested web pages from the cache to large numbers of receivers. We describe the operation of the cyclic multicast proxy server and characterized the gains in performance through simulation of the cyclic multicast proxy server.

Development of a competitive and collaborative platform for block diagram and resistive circuit reduction in a basic electrical engineering course

Competition and collaboration are two universal ingredients in all human cultures. Competition has been observed over time as a phenomenon that has helped people achieve the very best of their potentials in their various fields. Competition has also helped individuals achieve feats they would not have ordinarily achieved as they are pushed beyond their limits. The same can also be said of cooperation and collaboration, which can be used to achieve specific goals or objectives. Hence, both competition and collaboration can be vital in creating a healthy learning process among students. This paper discusses a competitive and collaborative platform on the learning process for two selected online courses in Electrical Engineering. Using a platform developed in LabVIEW programming language, a community of students were encouraged to compete online as they try to reduce block diagrams of subsystems in Control Engineering as well as reduce given Series-Parallel Resistor Circuits in the shortest time and amount of steps possible. At the end of each trial, students can view the finish time of other students and can share, online, their individual solutions with the community as well as discuss ideas such as reduction techniques they find most expedient via a public online notepad. This creates a means of learning from the community. The platform helps to passively induce a competitive and collaborative perspective in the learning pathway of students, thereby improving the interest and experience of students in the selected subject areas. The platform uses an online server to maintain communications from all the students in their various locations. Students can view the timed performance of their counterparts on a leadership board thereby engendering induced competition in the learning community. The instructor or administrator can also monitor activities in the community from a server portal.

Design of a university-based information service centre with SMS notification (Obafemi Awolowo University as a case study)

Mobile applications are being implemented in varieties of areas including mobile commerce, purchase of services and products using mobile devices, gaming, banking, information services etc. Obafemi Awolowo University is a large academic community that can benefit from a mobile information service centre. There is a large population of students who can satisfy a great deal of their information needs. Existing modes of information delivery are inefficient and in most cases not timely. There is therefore a need for the provisioning of a suitable software application framework that can meet this critical need. This paper presents a suitable software system that can deliver information services with mobile functionality to the content subscriber (students in this case). Mobile devices are prevalent amongst students and teachers, which provides the motivation for the application of mobile technologies in learning environment. The mobility provided was achieved using SMS over GSM Network with the hardware implemented on a GSM Nokia phone acting as a modem. Object-Oriented Analysis and Design (OOAD) approach with the Unified Modelling Language (UML) was employed to document the software component of the application. This system was then implemented in Java programming language. The software developed include; integrated subscription, payment and billing, user profile management, efficient mobile architecture, and ease of content publishing, all loosely coupled, to allow for further extension to the service architecture.