Effects of Attackers and Attacks on Availability Requirement in VANET

1. VANET Security Research Group (VSRG) Effects of Attackers and Attacks on Availability Requirement in Vehicular Network: A Survey Dr I.A.Sumra

2. Introduction V A E T N • Vehicular ad-hoc network is a special kind of network in which nodes (Vehicles) can communicate with each other on the road and with its Infrastructure. V2I Road Side Unit (RSU) V2V V2V Basic VANET Architecture 2

3. Safety Applications Non Safety Applications VANET Applications Work Zone Warning:!!! Work Zone Warning:!!! Work in Progress Plz! use Alt. route Shopping MALL ( TESCO ) Parking Slot Available!!! RSU Parking Slot Available!!! 3

4. VANET Security Requirements • Vehicular network applications require security and the objective of these applications is to serve users and make their journey secure and comfortable. • Attackers have their own role in this network and we cannot predict the dynamic behavior of the attacker. If an attacker works on a safety application and changes the content of the safety message then it poses a very difficult condition on the road and many users will be affected due to this kind of attack. • Accidents are often the result of an alteration of any safety message or the sending of even one wrong safety message in a network and many human lives are at risk [1].

5. TYPES OF BEHAVIOR IN VEHIUCLAR NETWORK • Network Behavior

6. TYPES OF BEHAVIOR IN VEHIUCLAR NETWORK • Attacker Behavior

7. AVAILABILITY REQUIREMENT IN VANET • Availability is one of the hot research topics in vehicular communication. The purpose of a vehicular network is to serve the users. But if the network is not available for communication then the main goal of the network has become • useless. • If an accident happens in location X and the user sends this information to another vehicle but the channel is not available due to a DoS attack, this makes availability of network a significant factor.

8. SECURITY REQUIREMENTS WITH SAFETY APPLICATIONS

9. ATTACKERS AND ATTACKS ON AVAILABILITY IN VANET

10. A.DENIAL OF SERVICE (DOS) ATTACK IN VANET • In VANET, DOS shall not be allowed to happen, where seamless life critical information must reach its intended destination securely and timely. In summary, there are three ways the attackers may achieve DOS attacks. • There are three levels of DOS attacks as described below. • Basic Level: Overwhelm the Node Resources • Extended Level: Jamming the Channel

11. A. DENIAL OF SERVICE (DOS) ATTACK IN VANET • Drop Communication Packets: • It is also called network DoS attack, selfish node or malicious node drop communication packets in network. This is also one of the aspects related to behavior of an attacker in which an attacker just drops the packets; the purpose of this is to ensure that users do not perform any type of communication in the network.

12. B. Distributed Denial of Service (DDoS) Attack

13. C- Broadcast Tampering Attack • In this case, an attacker tampers with the broadcast safety message and possibly injects false safety message. The purpose of this is to cause road accidents or change the flow of traffic on some specific route.

14. D- Malware Attack • A vehicle has its own software and application unit (AU) which performs its own task and communicates with other users as well as the road side unit (RSU). • There is some possibility to enter a virus and worm into the vehicle and disturb the operation of the network.

15. E- Spamming Attack • In this situation, the sole purpose of the attacker is to increase the latency of the transmission and use up the bandwidth of the network so no service is available to other • users; this is achieved by sending spam messages through the network. • It is nearly impossible to control attacks of this type when there is no basic infrastructure or centralized administration available.

16. F- Black Hole Attack • Blackhole is a different kind of attack and there are two possible cases in any particular vehicular network. • When any new user wants to start communication with other users or simply participate in a network, then other users simply refuse it. In Fig. 11, user D wants to start communication with user X, but user X refuses it and simply sends a reply with ‘SORRY’. So now user D tries To communicate with any other user of that network. • One user starts communication with other users of the network and it is suddenly dropped out of the communication.

17. ATTACKS ON AVAILABILITY WITH THREAT LEVELS

18. Conclusion • In vehicular network, the attackers can launch different kind of attacks in network and purposes of these attacks are creating problems for authentic users of network and also break the security requirements. • So, availability is one of the key security requirements in network and due to negative behaviour of attackers and attackers this security requirements is also effected. • In this paper, we have provided the detail description about the availability security requirements and also mentioned the different types of attackers who launch attacks related to availability of network.

19. Thank you….. 19

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