Intrusion detection systems play a vital role in network security. Central to these systems is
the language used to express policies. Ideally, this language should be powerful …

In today's rapidly evolving technological scenario, mobile computing devices are always at
an increased risk of being attacked and exploited. Mobile security challenges comprise …

The proliferation of social and collaborative media has been accompanied by an increased
level of cyber attacks on social networking and collaboration sites. One serious type of attack …

The exponential growth in the use of mobile phones and tablets to gain wireless access to
the Internet has been accompanied by a similar growth in cyber attacks over wireless links to …

With the recent explosion in wireless hotspots, more and more users find themselves
browsing the internet in an insecure manner. This is due to the typical lack of security in the …

One-way hash chains are a popular cryptographic technique used in many security
applications. In this paper, we present a two-tier one-way hash chain (TTOHC) protocol to …

Este periodo doctoral ha sido un camino de gran aprendizaje. Un camino con sus picos,
valles, aventuras, obstáculos... todos ellos merecen ser vividos. Y es que una tesis no es …

Web-based applications often use cookies to maintain state in HTTP protocol. However the
uses of cookie have grown far beyond their original intention. Cookies are used to store …

In this dissertation, new approaches that utilize the one-way cryptographic hash functions in
designing improved network security protocols are investigated. The proposed approaches …

A large number of web sites, including e-commerce and famous websites such as Hotmail,
Gmail, Yahoo mail, Hi5, and Face-book, are vulnerable to Session Hijacking, whereby a …