Browse All

Theses & Dissertations

Submissions

Multiple Bridge Secret Delivery in Wireless Sensor Networks

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Spoorthy Nimmagadda (Creator)
Institution
The University of North Carolina at Greensboro (UNCG )
Web Site: http://library.uncg.edu/
Advisor
Jing Deng

Abstract: Achieving security in wireless sensor networks is a challenging problem due to the inherent resource and computing constraints. Several key distribution techniques have been proposed in the technical literature for efficient distribution of keys to the nodes prior deployment. These techniques establish secure links for some pairs of physically connected nodes but leave other pairs alone. Remaining nodes use multi-hop scheme to form a secured path connecting these links. Using this technique, the secret is disclosed to all the nodes on the path. Therefore, if any of the nodes is compromised by an adversary, secret is disclosed to the adversary. To solve this problem, a scheme called Babel was proposed recently that finds common bridge node to deliver secret link keys to their neighbors. In this scheme regular paths are used to deliver multiple keys with the common bridge node, hence key compromise probability is lowered compared to previous techniques. Our work is based on the Babel scheme and has several advantages. In our work we propose a new scheme that finds multiple bridge nodes to deliver secret link keys to all its physical neighbors. Keys are distributed to multiple bridge nodes instead of one common bridge node to establish secure connections to the disconnected nodes. Hence even if a few of the bridge nodes are compromised, secret will not be disclosed to the adversary. We present the details of our scheme's design and investigate the connectivity and security performance of our scheme in this thesis.

Additional Information

Publication
Dissertation
Language: English
Date: 2010
Keywords
Cryptography, Security, Wireless Sensor Networks
Subjects
Wireless sensor networks $x Security measures.
Data encryption (Computer science)
Cryptography.