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In this paper we attempt to answer two questions: (1) Why should we be interested in the security of control systems? And (2) What are the new and fundamentally different requirements and problems for the security of control systems? We also propose a new mathematical framework to analyze attacks against control systems. Within this framework we formulate… (More)
Selfish behavior at the MAC layer can have devastating side effects on the performance of wireless networks, similar to the effects of DoS attacks. In this paper we focus on the prevention and detection of the manipulation of the backoff mechanism by selfish nodes in 802.11. We first propose an algorithm to ensure honest backoffs when at least one, either… (More)
In the last years there has been an increasing interest in the security of process control and SCADA systems. Furthermore, recent computer attacks such as the Stuxnet worm, have shown there are parties with the motivation and resources to effectively attack control systems. While previous work has proposed new security mechanisms for control systems, few… (More)
—We discuss three key challenges for securing cyber-physical systems: (1) understanding the threats, and possible consequences of attacks, (2) identifying the unique properties of cyber-physical systems and their differences from traditional IT security, and (3) discussing security mechanisms applicable to cyber-physical systems. In particular, we analyze… (More)
We revisit the problem of detecting greedy behavior in the IEEE 802.11 MAC protocol by evaluating the performance of two previously proposed schemes: DOMINO and the Sequential Probability Ratio Test (SPRT). Our evaluation is carried out in four steps. We first derive a new analytical formulation of the SPRT that considers access to the wireless medium in… (More)
In this position paper we investigate the security of cyber-physical systems. We (1) identify and define the problem of secure control, (2) investigate the defenses that information security and control theory can provide, and (3) propose a set of challenges that need to be addressed to improve the survivability of cyber-physical systems.
In recent years we have witnessed the emergence and establishment of research in sensor network security. The majority of the literature has focused on discovering numerous vul-nerabilities and attacks against sensor networks, along with suggestions for corresponding countermeasures. However, there has been little guidance for understanding the holistic… (More)
In this paper we look at the problem of interoperability of digital rights management (DRM)systems in home networks. We introduce an intermediate module called the Domain Interoperability Manager (DIM) to efficiently deal with the problem of content and license translation across different DRM regimes. We also consider the threat model specific to… (More)
By employing an interdependent security game-theoretic framework, we study how individual Internet Service Providers can coordinate the investment decisions of end users to improve the security of the overall system. We study two different forms of intervention: rebates in combination with penalties (pay for outcome) and costsubsidies (pay for effort).
Selfish behavior at the Medium Access (MAC) Layer can have devastating side effects on the performance of wireless networks, with effects similar to those of Denial of Service (DoS) attacks. In this paper we consider the problem of detection and prevention of node misbehavior at the MAC layer, focusing on the back-off manipulation by selfish nodes. We first… (More)