Wireless Sensor Network and Ad Hoc Network, Security and Privacy, Peer to Peer Networks
Privacy and Anonymity in Data-Centric Sensor Network
Due to the attractive capabilities of sensing harsh and hostile
environments, generating fine-grained sensor data, as well as
collecting and provisioning the data to users, wireless sensor
networks have been widely adopted in many applications such as
wild-life monitoring, military target tracking, battlefield
surveillance, etc. These applications often require the deployment
of large-scale networks to vast areas, and hence may result in a
huge volume of sensor data. This, together with the scarcity in
resources and the hostility in operation environments, necessitates
the design of efficient and secure strategies for the networks to
collect and disseminate sensor data.
In recent years, data-centric storage (DCS) data management schemes have been proposed
for sensor networks which balance the tradeoff between query overhead(read) and storage cost(write).
One typical implementation of DCS is based on geographic hash table (GHT), in which each data item is named and a hash function
is applied on the name to get a location for storing the data. This
strategy allows data storage within the network and efficient data
query without any message flooding, and hence is more power efficient in
many scenarios.
Along with the improvement in energy efficiency, the DCS strategy
brings new security challenges which have not received adequate
attention in the past research. Specifically, the DCS scheme
requires every sensor node to be aware of the locations of storage
nodes for all data types. Once the adversary has captured one node,
it can obtain these locations. Based on the knowledge, the adversary
may attack the data-centric storage system by compromising storage
nodes, or blocking communications between storage nodes and other
sensor nodes. Therefore, it is vital to prevent the locations of
storage nodes from being exposed to the adversary.
Many privacy and anonymity issues are under exploiting under such DCS setup. Specifically, location privacy, query anonymity, and data privacy. Possible solution is to design new secure routing protocol with crytographical primitives.
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Query-based Navigation In Wireless Mobile Sensor/Ad Hoc Networks
Sensor networks offers economically viable solutions for a variety of applications.
And one type of applications is to monitor the ambient conditions of mobile
objects such as wild animals in the forest, vehicles on the high way, and patients
in the hospital etc. In addition to the information gathered by these sensor
nodes, user might also be interested in locating some particular objects satisfying
some criteria. For example, a photographer would like to take pictures of the
deer in the forest for one magazine. He might expect the sensor network can help
him to locate the nearest deer and navigate him to that location. How to support
such application in an energy efficient distributed fashion is an interesting and
challenge research problem. The key challenges of this problem are how to
efficiently match the query and how to provide high-quality navigation path.
Concretely, in above example, the sensor network should first find which deer
is closest to the position of the photographer at that time given there are many
deers in the entire forest. Secondly, the sensor network should generate one
shortest path to lead the photographer to the location of the nearest deer. For
easier description, we abstract this problem tentatively as an query-oriented
navigation problem in a data-centric sensor network.
Chanjun Yang, Jianming Zhou, Wensheng Zhang and Johnny Wong Pairwise Key Establishment for Large-Scale Sensor Networks: from Identifier-based to Location-based To appear in Proceedings of the First International Conference on Scalable Information Systems (INFOSCALE), May 29,2005. HongKong
In preparation
Ying Cai, Jianming Zhou Streaming Over Subscription Overlay Networks To appear in Proceedings of the Fourteenth International Conference On Computer Communications and Networks (ICCCN), October 17-19,2005, San Diego, California, USA
Ying Cai, Jianming Zhou An Overlay Subscription Network for Live Internet TV Broadcast Submitted to IEEE Transactions on Knowledge and Data Engineering (TKDE)
