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Most ad hoc networks do not implement any network access control, leaving these networks vulnerable to packet injection attacks where a malicious node injects packets into the network with the goal of depleting the resources of the nodes relaying the packets. To prevent such attacks, it is necessary to employ authentication mechanisms that ensure that only authorised nodes can inject traffic into the network. This paper designs a Lightweight Inter-layer Protocol (LIP) for preventing packet injection attacks based on an efficient local broadcast authentication mechanism. In addition to preventing attacks by unauthorised nodes, LIP can also detect and minimise the impersonation attacks by compromised nodes.

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Format:PDFSize:418 KB
Date:Mar 2007
Pages:14

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