Secure Local Data Aggregation and Delay Tolerant Dissemination in VANETs

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS Distributed event detection in Vehicular Adhoc NETworks o Interested in detecting vehicle crash events o Collision will affect both nearby vehicles and vehicles approaching the site Other vehicles may be present during such an event o May flood the wireless channel with crash data

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS Minimize the amount of power consumed by radio transmissions o Extend the battery life o Reduce communication overhead

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS Minimum spanning trees (MST) o Maximize the degree o Maximize the number of hops Leader election algorithm o Address the collision transmission problem in wireless networks Time-constrained data transmission o Ensure that all data eventually reaches the sink

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS Flow updating o Broadcast- and gossip-based o Exploit the symmetry of the network flows Hierarchical aggregation o Based on the distance form the origin

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS Broadcast data to the local subset network Locality Quickly Efficiently

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS Flash dissemination o Broadcast as fast as possible o Not scalable CREW o Gossip-based o Prevent receiving multiple copies of the same message o Scalable

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS Jamming attack o Interfere the radio channel Hidden vehicle o Adversary pretend to be in better position for broadcast o Results: stop broadcasting

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS Wormhole attack o Tunneling message from area A to area B using fast external channel o Authentic messages sent o Trick vehicles in area B Sybil attack o Multiple fake identities o Fake positions

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS Design a protocol for event detection in VANETs o Initial event detection o Dissemination Simulation on NS3

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS Authentication of original event data Based on flash dissemination Built on top of a graph topology Multiple observers agreement Data integrity Non repudiation Designed for quick dissemination for most likely affected vihecle

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS

Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS