Data protection is an increasingly important issue in today’s communication networks. Traditional solutions for protecting data when transferred over a network are almost exclusively based on cryptography. As a complement, we propose the use of multiple physically separate paths to accomplish data protection. A general concept for providing physical separation of data streams together with a th...

Cognitive radio technology gets much attention of wireless network research environments as a new way to utilize the precious spectrum efficiently. IEEE 802.22, Wireless Regional Area Network, is the first international standard based on cognitive radio technology which intends to provide broadband access by utilizing unused TV channels, also known as TV white spaces. This standard provides PHY...

Cooperative wide-band spectrum sensing has been considered to enable cognitive radio operation of wireless regional area networks (WRAN) in the UHF and VHF TV broadcasting bands. In this paper, cooperative compressed spectrum sensing is considered to enable fast sensing of the wide-band spectrum. The speed and accuracy of spectrum sensing are improved by further optimization of the compressed s...

Cognitive radio is being intensively investigated by regulatory bodies as the enabling technology for opportunistic access to the TV white spaces. The successful deployment of cognitive radio networks and the realization of their benefits depend on the assignment of essential security challenges to resist misuse of the systems. In this paper, we propose a primary user authentication scheme in t...

With the emergence of widely available hardware and software tools for GSM hacking, the security of cellular networks is threatened even by script kiddies. In this paper we present four different attacks in GSM networks, using commodity hardware as well as open source and freely available software tools. All attacks are performed using a common DVB-T TV tuner, which is used as a sniffer for the...

For the first time in a generation, basic communication services like sending letters, making phone calls, listening to the radio or watching TV have begun to change, with a migration to email, Internet telephony, Internet radio and TV in various stages. In this white paper, we discuss some of the new services that we envision in a communication environment dominated by the Internet. We first d...

To accommodate the rapidly increasing demand for wireless broadband communications in Smart Grid (SG) networks, research efforts are currently ongoing to enable the SG networks to utilize the TV spectrum according to the Cognitive Radio paradigm. To this aim, in this letter, we develop an analytical framework for the optimal deployment of multiple closely-located SG Neighborhood Area Networks (...

Abstract First-generation mobile TV has involved delivering content to cell phones. But as mobile TV evolves, it will find greater significance as part of a multifaceted video offering that combines multiple screens, devices, networks, and content types. Content, or a particular viewing session, moves with the user, across devices and across networks. Furthermore, in addition to providing an al...