DEFENDING ON-OFF ATTACKS
Existing trust management schemes that employ redemption schemes
fail to discriminate between temporary errors and disguised malicious behaviors
in which the attacker cleverly behaves well and badly alternatively. In this
paper, we present the vulnerabilities of existing redemption schemes, and
describe a new trust management and redemption scheme that can discriminate
between temporary errors and disguised malicious behaviors with a flexible
design. We show the analytical results of the trust management scheme, and
demonstrate the advantages of the proposed scheme with simulation conducted in
a Wireless Sensor Network.
Trust is an important but complex concept in social science. Trust
helps people to make decisions in unpredictable circumstances by reducing the
uncertainty. Many distributed systems can be unpredictable and uncertain when the
entities try to collaborate with each other. Because of the great number of
possible threats in the varying applications that
can be deployed through a distributed system, applying trust in such systems
can be quite complex. Research on trust management schemes, which manage trust
and decide policies, has emerged as a challenging issue.
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