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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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PowerPoint Slideshow about 'Secure Routing in Ad Hoc Wireless Networks' - carr


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Presentation Transcript
requirements of a secure routing protocol
Requirements of a Secure Routing Protocol
  • Detection of malicious nodes
  • Guarantee of correct route discovery
  • Confidentiality of network topology
  • Stability against attacks
slide3
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
slide4
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
slide6
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
slide7
SEAD
  • One-Way Hash Function
    • Used for authentication
    • Generates a one-way hash chain
  • Avoids looping
  • Easily implement with slight modifications
slide8
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
slide9
ARAN
  • End-to-end route authentication:
    • Ensures that the correct destination is reached by the packets
    • RouteRequest and RouteReply packets encrypted at each node
security aware aodv protocol
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

security aware aodv protocol1
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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