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Secure Routing in Ad Hoc Wireless Networks

Secure Routing in Ad Hoc Wireless Networks. 11.03.2005. Requirements of a Secure Routing Protocol. Detection of malicious nodes Guarantee of correct route discovery Confidentiality of network topology Stability against attacks. AODV. Ad-hoc On-demand Distance Vector Protocol

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Secure Routing in Ad Hoc Wireless Networks

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  1. Secure Routing in Ad Hoc Wireless Networks 11.03.2005

  2. Requirements of a Secure Routing Protocol • Detection of malicious nodes • Guarantee of correct route discovery • Confidentiality of network topology • Stability against attacks

  3. AODV • Ad-hoc On-demand Distance Vector Protocol • Source node broadcasts RouteRequest • Intermediate nodes forward it • If node has a route to destination, it initiates RouteReply

  4. SAR • Security-aware Ad hoc Routing protocol • Enables different levels of security • Level of trust as a metric • Each packet is associated with a security level • Intermediate nodes are associated with security levels • Different keys for different levels of security

  5. SAR

  6. SEAD • Secure Efficient Ad hoc Distance vector routing protocol • Distance Vector Routing • The metric used for routing is hop-count • Periodic and/or triggered updates • DSDV (Highly Dynamic Destination-Sequenced Distance-Vector Routing) uses sequence numbers • DSDV-SQ (DSDV for sequence numbers) • Assumes upper bound for the metric used

  7. SEAD • One-Way Hash Function • Used for authentication • Generates a one-way hash chain • Avoids looping • Easily implement with slight modifications

  8. ARAN • Authenticated Routing for Ad hoc Networks routing protocol • Based on cryptographic certificates • Defeats all identified attacks on the network layer • Issue of certificates: • There exists a trusted server • Doesn’t specify any specific key distribution algorithm

  9. ARAN • End-to-end route authentication: • Ensures that the correct destination is reached by the packets • RouteRequest and RouteReply packets encrypted at each node

  10. Security-Aware AODV Protocol • RouteRequest packets only sent when data packets arrive at node for transmission • Malicious node advertises that it has the shortest path redirecting all packets trough itself (blackhole attack) AODV = Ad-hoc On-demand Distance Vector Protocol

  11. Security-Aware AODV Protocol • Solutions: • Restrict the intermediate nodes from originating RouteReply • FurtherRouteRequest AODV = Ad-hoc On-demand Distance Vector Protocol

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