Primary user emulation (PUE) attacks on cognitive radio networks pose a serious threat to the deployment of this technique. Previous approaches usually depend on individual or combined received signal strength (RSS) measurements to detect emulators. In this paper, we propose a new mechanism based on physical layer network coding to detect the emulators. When two signal sequences interfere at th...

Cognitive radio (CR) is an opportunistic communication technology which is designed to utilize the maximum available licensed bandwidth for unlicensed users. In CR, when the spectrum is not used by primary user, it is accessed by the unlicensed users/secondary users. . In CRN a selfish SU (secondary user) broadcasts faked channel allocation information to other neighboring SUs in order to occup...

Cognitive radios (CRs) have been proposed as a promising solution for improving spectrum utilization via opportunistic spectrum sharing. In a CR network environment, primary (licensed) users have priority over secondary (unlicensed) users when accessing the wireless channel. Thus, if a malicious secondary user exploits this spectrum access etiquette by mimicking the spectral characteristics of ...

Cognitive radio networks have been envisaged to improve efficiency in accessing the frequency spectrum. However, these networks are prone to different kind of attacks and failures that can compromise the security and performance of licensed and unlicensed users. This work presents a framework for security and resilience in cognitive radio networks. As a showcase, this framework is applied to sp...

The satellite TV industry relies heavily on the use of smart card technology at the very heart of broadcasted services that are protected by legacy conditional access systems. The process of Satellite TV signal protection is distributed amongst a number of system components, e.g. smart cards, receivers, Conditional Access Modules (CAM) and the content provider. However, the introduction of “Ope...

We propose a distributed spectrum decision protocol resilient to primary user emulation attacks (PUEA) in dynamic spectrum access (DSA) networks. PUEA is a type of denialof-service attack that can result in unreliable and/or disconnected DSA networks by depriving legitimate secondary users of spectrum access. We first propose an individual detection mechanism for secondary users to achieve prel...

Software card emulation is a new approch to advance the interoperability of NFC with legacy contactless smartcard systems. It has been first introduced to NFC-enabled mobile phones by Research In Motion (RIM) on their BlackBerry platform. Software card emulation aims at opening and simplifying the complex and tightly controlled card emulation functionality. While this form of card emulation, th...

The increasing demand for wireless communication introduces efficient spectrum utilization challenge. To address this challenge, Cognitive Radio (CR) has emerged as the key technology, which enables opportunistic access to the spectrum. However, security is a very important issue but not well addressed in CR networks. In this paper, we focus on security problems arising from Primary User Emulat...

Emulation used as a long-term preservation strategy offers the potential to keep digital objects in their original condition and experience them within their original computer environment. However, having just an emulator in place is not enough. To apply emulation as a fully fledged strategy, an automated and user-friendly approach is required. This cannot be done without knowledge and contextu...