The future of security in Wireless Multimedia Sensor Networks

This is a position paper on our views on security aspects of Wireless Multimedia Sensor Networks (Secure WMSNs). It is meant to serve as a brief survey. But, more importantly, it gives a perspective on how we foresee the future of this research area, its main challenges, and its future trends. We believe that this paper will spur new discussions and research ideas among the researchers from both the industry and the academic world.     

A CMOS line driver for ADSL central office applications

An ADSL central office (CO) line driver utilizing a single 6-V supply is described. The line driver output produces a 20-V/sub ppd/ signal to deliver a 40-V/sub ppd/ swing to a 100-/spl Omega/ line. The adoption of an active termination, a dynamic supply control circuit technique, and deep n-well devices at the output stage of the line driver is key in achieving such a large voltage swing in a 0.25-/spl mu/m CMOS process. In order to ensure reliability of the output devices, the dynamic supply control algorithm is designed to activate only one lift amplifier at each signal path of the differential line driver at any given time. A transformer turns ratio of 1:2.4 ensures both reliability and optimal power dissipation in the presence of system losses. The total power dissipation of the line driver is 700 mW when discrete multitone signals with a crest factor of 15 dB were used to deliver 20.4 dBm to a 100-/spl Omega/ line.     

Denial-of-Service attacks and countermeasures in IEEE 802.11 wireless networks

IEEE 802.11 access points deployed in shopping malls, university campuses, crowded streets, airports, and many other locations provide ubiquitous Internet access to millions of stations. However, these hot spots are vulnerable to Denial-of-Service (DoS) attacks due to the broadcast nature of wireless communication. It does not require specialized hardware or particularly high level of experience to render 802.11 networks inoperable through DoS attacks. Standard off-the-shelf equipment is sufficient for a malicious station to disrupt the service between access points and stations. In this paper we present a systematic survey of DoS attacks, which exploits MAC and physical layer vulnerabilities of 802.11 networks. Available countermeasures against DoS attacks are discussed and compared. Future research directions and open issues are also discussed.     

A survey of visual sensor network platforms

Recent developments in low-cost CMOS cameras have created the opportunity of bringing imaging capabilities to sensor networks. Various visual sensor platforms have been developed with the aim of integrating visual data to wireless sensor applications. The objective of this article is to survey current visual sensor platforms according to in-network processing and compression/coding techniques together with their targeted applications. Characteristics of these platforms such as level of integration, data processing hardware, energy dissipation, radios and operating systems are also explored and discussed.     

Authentication-enabled attribute-based access control for smart homes

International Journal of Information Security - Smart home technologies constantly bring significant convenience to our daily lives. Unfortunately, increased security risks accompany this...