A new data transmission technique is about to create a revolution in the field of wireless personal area networks. This new method, called Ultra Wideband, is based on the transmission of data through the communication channel below the noise floor. The objective of this article is to present this new data transmission method, outline the main advantages and introduce the future applications.

Emoji are two-dimensional pictographs that were originally designed to convey emotion between participants in text-based conversation. This workshop paper draws on interview data to describe ways in which emoji have been appropriated in pursuit of other relationally meaningful behaviours in contemporary messaging applications. We speculate that the presence of appropriable tools like emoji migh...

Steganography is the science of hiding the very presence of a secret message within a public communication channel. In Crypto 2002, Hopper, Langford, and von Ahn proposed the first complexitytheoretic definition and constructions of stegosystems. They later pointed out and corrected a flaw in one of their basic constructions. The correction, unfortunately, introduced a need for expensive errorc...

In the proposed computer assisted visual interactive recognition (CAVIAR) methodology, a parameterized geometrical model serves as the human-computer communication channel. The iterative CAVIAR process is modelled as a finite state machine. A flower recognition system is implemented based on the proposed methodology. Evaluation on 30 subjects shows that 1) the accuracy of the CAVIAR system is 9...

One of the main issues encountered in the development of VoIP applications and infrastructures relates with ensuring the security of the communication channel between peers. The discussion on this subject can be split in two principal directions: the signaling path security and the media path security. In this document we focus on the latter by overviewing the current most important available m...

The print medium serves as a major communication channel in organizations. One way to increase the richness of print media is by using augmented reality (AR) technologies. Because AR can provide a richer experience, it is likely that AR can make a viewer’s interaction with the print media more engaging. A more engaging communication in turn is likely to improve learning as well as other importa...

Kish proposed a scheme to exchange keys between two parties under the concealment of thermal noise. We show that the theoretical model in the scheme implicitly assumes thermal equilibrium throughout the communication channel. This assumption, however, is invalid in real communication systems. A slight temperature difference in the channel, as demonstrated in the paper, will lead to security fai...

Currently, my research interests are in Wireless Networks and Mobile Systems with emphasis on Security, Robustness and Survivability. Wireless and mobile networks are prone to certain threats that are either unique, or more pronounced for them. This is due to the constraints imposed by open air nature of the communication channel, bandwidth limitations and ever changing topology due to node mob...

We consider the problem of communicating over an unknown and arbitrarily varying channel, using feedback. This paper focuses on the problem of determining the input behavior, or more specifically, a prior which is used to randomly generate a codebook. We pose the problem of setting the prior as a universal sequential prediction problem using information theoretic abstractions of the communicati...

The behavior of a given wireless device may affect the communication capabilities of a neighboring device, notably because the radio communication channel is usually shared in wireless networks. In this tutorial, we carefully explain how situations of this kind can be modelled by making use of game theory. By leveraging on four simple running examples, we introduce the most fundamental concepts...