College of Engineering

Abstract : As Internet and the web are extremely vulnerable against various sorts of threats, therefore, there is an increasing demand for securing web services. The web is fundamentally a client/server application running over Internet and TCP/IP intranets, hence, security of the network traffic between the web browser and servers is a basic issue for achieving web security in order to prevent any tampers or any intruders that want to alter or read any information; this is achieved using SSL (Socket Secure Layer).

Abstract : The work reported in this thesis deals with the performability evaluation of the Token Ring Network. Performability evaluation arose from the need to determine overall quality of service by relating and quantifying aspects of what a specific system is and does (how well it performs) with respect to what the system is required to be and to do (how its functionality is affected by faults). Performability is a term used to describe performance and reliability. Performance is defined as _quality of service provided the system is correct_.