this presentation gives you best you want in ad hoc networks and wireless networking

1. -A Presentation on-
Security of Ad-Hoc
Networks
-Presented By-
Jayesh Rane
R.C.Patel Institute of Technology,
Shirpur.

2. Traditional Wireless Network
high speed backbone
 Infrastructure on-line
– base stations server
– high speed backbone
– on-line servers
 Network operators
– operate and maintain the system
– determine policies
 Single-hop wireless
communication
base
mobile
station
station
2
Security in Ad-Hoc Networks

3. Wireless Ad-Hoc Networks
 No infrastructure
– no base stations
– no backbone
– no servers ( P2P)
 No network operators
– self-organization
– self-configuration
– self-healing
 Multi-hop wireless
communication
Security in Ad-Hoc Networks 3

4. Motivation
 Security is the most often cited concern with wireless
networks
 Wireless networks pose unique security problems
 Power computation constraints are often higher in
wireless networks, making security requirements
different
Security in Ad-Hoc Networks 4

5. Attacks on Ad-Hoc Networks
• Place of disclosure:
Location disclosure Attacks that target Confidentiality requirements of the
ad hoc network.
• A black hole:
Attack malicious node and enters false answers route to route requests it
receives
• Wormholes:
It involves co-operation between the two malicious nodes that
participate in the network to appear one attacker.
• Denial of Service:
Specific instances of denial of service attacks include the routing table
overflow and the sleep deprivation torture.
Security in Ad-Hoc Networks 5

6. Why Security Required?
 Data confidentiality: keep data secret
 Data integrity: prevent data from being altered
 Data freshness: data must be recent
 Data availability: data should be available on request
 Data authentication: confirmation that data or request
came from a specific, valid sender
Security in Ad-Hoc Networks 6

7. Security Challenges
 Vulnerability of channels
Messages can be overheard and fake messages can be introduced into the
network
 Vulnerability of nodes
Nodes do not usually reside in physically protected places
 Lack of infrastructure
Special networks should operate independently of any fixed infrastructure.
 Dynamic Topology
The permanent changes of topology require sophisticated routing protocols
Security in Ad-Hoc Networks 7

8. Solution against Attacks
1. Model Based on TTP(Third Trusted Party)
Security in Ad-Hoc Networks 8

9. Solution against Attacks(cont…)
2. Secure Aware Protocol (For Blackhole Attack)
 Improve the relevance of the routes
discovered by ad hoc routing protocols.
 Embed security metric into the RREQ packet
 Authenticated users belonging to same
trust level share a secret key
Security in Ad-Hoc Networks 9

10. Solution against Attacks
3. Packet Leashes (for Wormhole Attacks)
 The recipient of the packet is within a certain distance from the
sender
 Each node must know its own location; all nodes must have loosely
synchronized clocks
Security in Ad-Hoc Networks 10

11. Research Directions
• Decentralized public-key management schemes
– using threshold cryptography
– exploiting mobility and secure side channels
• Secure ad hoc routing
– various schemes for authenticating routing information that is distributed or
exchanged among the nodes
• Incentives for co-operation
– micro-payment based schemes
– reputation based schemes
• Low cost cryptographic primitives (algorithms and protocols)
Security in Ad-Hoc Networks 11

12. Conclusion
• Security in ad hoc networks is a very challenging issue
• Basic Mechanisms
– Difficult to force the nodes to collaborate
– No standard routing protocol yet
• Because of their characteristics, ad hoc networks, are open
especially to Denial of service attacks
• Classical security solutions are not suited for ad hoc networks
– Security services should be distributed
• Standard protocols?
– At the moment no universal solution
Security in Ad-Hoc Networks 12

13. Summary
 Traditional Wireless Networks
 Wireless Ad-Hoc Networks
 Attacks on Ad-Hoc Networks
 Why Security Required?
 Security Challenges
 Solutions for Challenges
» Model based on TTP
» Protection against Black Holes
» Protection against Wormholes
 Research Directions
 Conclusion
Security in Ad-Hoc Networks 13

14. Security in Ad-Hoc Networks 14