Experiment No. 1
Project Title: Broadcast using RSA
Introduction:
Wireless sensor networks (WSNs) are widely used in various
applications, such as building automation, mobile object tracking,
and habitat monitoring. A WSN usually consists of one or more
base stations and a large number of sensor nodes. Because the
sensor nodes are resource-constrained and usually deployed in
hostile environments, they are vulnerable to malicious attacks.
Thus, broadcast authentication becomes a critical issue in WSNs,
which can prevent adversaries from injecting bogus queries.
Traditional schemes applied the key pools, space pools of matrix
or polynomials to establish the pairwise key between any two
neighboring sensor nodes. Although these schemes can establish
a secure communication channel, they cannot withstand injecting
bogus queries.
Thus, three scenarios are considered in this paper. The first
scenario is that users broadcast messages to WSNs using their
own mobile device dynamically, and then each sensor node will
verify these messages. The second scenario is that once malicious
users are revoked by the base station, the action of rekeying will
be triggered by the base station. The third scenario is that when
new users join WSNs, the base station will take some appropriate
actions for these users.
In this project, an RSA-like scheme is employed to construct a
multiuser broadcast authentication mechanism. Although it is
usually thought that RSA is expensive for sensor nodes in terms of
computational overhead, however, the authors in the work in
showed that the cost of the RSA signature verification is not really
