Zusammenfassung
Ad hoc networks are a new wireless networking paradigm for mobile
hosts. Unlike traditional mobile wireless networks, ad hoc networks
do not rely on any fixed infrastructure. Instead, hosts rely on each
other to keep the network connected. Military tactical and other
security-sensitive operations are still the main applications of
ad hoc networks, although there is a trend to adopt ad hoc networks
for commercial uses due to their unique properties. One main challenge
in the design of these networks is their vulnerability to security
attacks. In this article, we study the threats on ad hoc network
faces and the security goals to be achieved. We identify the new
challenges and opportunities posed by this new networking environment
and explore new approaches to secure its communication. In particular,
we take advantage of the inherent redundancy in ad hoc networks-multiple
routes between nodes-to defend routing against denial-of-service
attacks. We also use replication and new cryptographic schemes, such
as threshold cryptography, to build a highly secure and highly available
key management service, which terms the core of our security framework
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