Publications de Mario Cagalj | EPFL Graph Search

Efficient MAC in cognitive radio systems: A game-theoretic approach

Jean-Pierre Hubaux, Mark Felegyhazi, Mario Cagalj

In this paper, we study the problem of efficient medium access control (MAC) among cognitive radio devices that are equipped with multiple radios and thus are capable of transmitting simultaneously at different frequencies (channels). We assume that radios ...

2009

Wormhole-Based Anti-Jamming Techniques in Sensor Networks

Jean-Pierre Hubaux, Mario Cagalj, Srdan Capkun

Due to their very nature, wireless sensor networks are probably the category of wireless networks most vulnerable to “radio channel jamming”-based Denial-of-Service (DoS) attacks. An adversary can easily mask the events that the sensor network should detec ...

2007

Non-cooperative Multi-radio Channel Allocation in Wireless Networks

Jean-Pierre Hubaux, Mark Felegyhazi, Mario Cagalj, Shirin Saeedi Bidokhti

Channel allocation was extensively studied in the framework of cellular networks. But the emergence of new system concepts, such as cognitive radio systems, has brought this topic into the focus of research again. In this paper, we study in detail the prob ...

2007

Border Games in Cellular Networks

Jean-Pierre Hubaux, Mark Felegyhazi, Mario Cagalj, Diego Dufour

In each country today, cellular networks operate on carefully separated frequency bands. This separation is imposed by the regulators of the given country to avoid interference between these networks. But, the separation is only valid within the borders of ...

2007

Thwarting selfish and malicious behavior in wireless networks

Mario Cagalj

Security is at the core of any communication system and, in particular, of wireless (radio) networks. In this thesis, we focus on three important security aspects in the framework of wireless networks: selfish (noncooperative) behavior at the Medium Access ...

EPFL2006

Multi-radio Channel Allocation in Competitive Wireless Networks

Jean-Pierre Hubaux, Mark Felegyhazi, Mario Cagalj

Channel allocation has been extensively studied in the framework of cellular networks, but the emergence of new system concepts, such as cognitive radio systems, bring this topic into the focus of research again. In this paper, we provide a formal analysis ...

2006

Secure Localization With Hidden and Mobile Base Stations

Srdan Capkun, Mario Cagalj

2006

Integrity (I) codes: Message Integrity Protection and Authentication over Insecure Channels

Jean-Pierre Hubaux, Mario Cagalj, Srdan Capkun

Inspired by unidirectional error detecting codes that are used in situations where only one kind of bit errors are possible (e.g., it is possible to change a bit “0” into a bit “1”, but not the contrary), we propose integrity codes (I-codes) for a radio co ...

2006

Key Agreement in Peer-to-Peer Wireless Networks

Jean-Pierre Hubaux, Mario Cagalj, Srdan Capkun

We present a set of simple techniques for key establishment over a radio link in peer-to-peer networks. Our approach is based on the Diffie-Hellman key agreement protocol, which is known to be vulnerable to the ``man-in-the-middle" attack if the two users ...

2006

Energy-efficient Broadcasting in All-wireless Networks

Jean-Pierre Hubaux, Christian Enz, Mario Cagalj

In all-wireless networks, minimizing energy consumption is crucial as in most cases the nodes are battery-operated. We focus on the problem of power-optimal broadcast, for which it is well known that the broadcast nature of radio transmissions can be explo ...

Springer Science2005