1. Secure Local Data Aggregation and Delay Tolerant Dissemination in VANETs

2. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 2 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

3. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 3 Minimize the amount of power consumed by radio transmissions o Extend the battery life o Reduce communication overhead

4. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 4 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

5. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 5 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

6. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 6 Broadcast data to the local subset network Locality Quickly Efficiently

7. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 7 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

8. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 8 Jamming attack o Interfere the radio channel Hidden vehicle o Adversary pretend to be in better position for broadcast o Results: stop broadcasting

9. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 9 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

10. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 10 Design a protocol for event detection in VANETs o Initial event detection o Dissemination Simulation on NS3

11. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 11 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

12. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 12

13. Cesar Ghali, Sky Faber, Kyle Benson, Quan Nguyen – CS 234 13