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In this paper, the problem of initial link establishment in multi-channel Cognitive Radio Networks (CRN) is investigated. Different from the traditional scenario, in which the transceiver pair can establish an initial link through exchanging the control messages on the Common Control Channel (CCC), a more realistic scenario in the absence of CCC is considered in our work. Without the help of CCC,...
Broadcast authentication is a critical security service in wireless sensor networks (WSNs). However, due to resource constrains of sensor nodes, providing authentication mechanism for broadcast message is difficult. ??TESLA is a lightweight broadcast authentication protocol, which use a one-way hash chain and the delayed disclosure of keys to provide the authentication service. However, it suffers...
Broadcast authentication is an essential security service in wireless sensor networks, as it allows a sender to broadcast messages to multiple nodes in an authenticated way. This paper propose a light-weight, scalable broadcast authentication scheme over a long period of time. Instead of using multi-level key chains as in multilevel ??TESLA, the scheme uses multiple short key chains to replace one...
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