Several schemes have been proposed for authenticating both the network and the mobile stations to one another in public access wireless networks. In this paper, we look at the weaknesses of such schemes and enumerate a set of four constraints for authentication in public access wireless networks. We then propose two authentication protocols that can overcome these weaknesses while satisfying th...

The rapid growth in deployment of wireless networks in recent years may be an indication that many organizations believe that their system will be adequately secured by the implementation of enhanced encryption and authentication. However, in our view, the emphasis on cryptographic solutions in wireless security is repeating the history of the “Maginot Line”. Potential attackers of wireless net...

This position paper discusses the blogging phenomenon from an information access point of view. We examine blogs as a source of knowledge, analyzing the properties which make them unique as a data collection. We outline information analysis tasks aimed at blogs, and discuss how the properties of blogs are used in this context; finally, we point out some of the main aims of current computational...

We describe AnonySense, a privacy-aware system for realizing pervasive applications based on collaborative, opportunistic sensing by personal mobile devices. AnonySense allows applications to submit sensing tasks to be distributed across participating mobile devices, later receiving verified, yet anonymized, sensor data reports back from the field, thus providing the first secure implementation...