Sensor nodes are typically
powered by batteries, communicate through wireless channels, and are usually
scattered densely and statically. Sensor networks have a broad range of applications
in military, homeland security, health care, environment, agriculture,
manufacturing, and so on.
403
Xiaojiang Du and Yang Xiao
One can envision in the future the deployment of large-scale sensor
networks where hundreds and thousands of small sensor nodes form selforganizing
wireless networks. Providing security in sensor networks is not an
easy task. Compared with conventional desktop computers, severe challenges
exist since sensor nodes have limited processing capability, storage, and energy,
and wireless links have limited bandwidth. Despite the above challenges,
security is important and even critical for many applications of sensor networks,
such as military and homeland security applications. Several recent
works have addressed security issues in sensor networks [1-18]. However, the
privacy and security issues posed by sensor networks still represent a rich field
of research problems.
In this survey, we first summarize typical attacks on sensor networks. We
then present the security objectives of sensor networks. Finally, we particularly
discuss two important security issues in sensor networks: key management and
secure routing. To achieve security in wireless sensor networks, it is important
to be able to perform various cryptographic operations, including encryption,
authentication, etc.
Pages:
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633