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lec-13 - Sensor Networks HopHopby-Hop Authentication...

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1 Sensor Networks Sensor Networks – Hop Hop- by by-Hop Authentication Hop Authentication Shambhu Upadhyaya Wireless Network Security Shambhu Upadhyaya 1 CSE 566 (Lecture 13) Introduction Sensor networks are subject to false data injection attacks - Deployed in unattended environments - Goal may be to deceive base station or deplete resources on relaying nodes Interleaved hop-by-hop authentication h t d t ti f Shambhu Upadhyaya 2 scheme guarantees detection of injected false data packets - If no more than t nodes are compromised
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2 Application Scenario Military application of sensor networks for reconnaissance of the opposing forces Deploy a cluster of sensor nodes around each area of interest - Tank movements, ship arrivals, munition plant - Deploy a base station in a secure location to control the sensors and collect data An adversary may compromise several sensor nodes - Inject false data into the network - Traditional authentication not good since adversary knows all the keying material possessed by the compromised Shambhu Upadhyaya 3 all the keying material possessed by the compromised nodes Goal of research - address false data injection attack - Base station verifies the authenticity of report - Filter out false data packets injected by compromised nodes Proposed Solution Hop-by-hop authentication scheme in which at l t t+1 d h t t least t+1 nodes have to agree upon a report before sending it to the base station All nodes in the path from the source to the base station participate in authenticating the report in an interleaved fashion Guarantees detection subject to a security Shambhu Upadhyaya 4 threshold - No more than t nodes are compromised
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