04-04-2012, 02:45 PM
Security of Ad-Hoc Networks
Security of AdHoc networks.ppt (Size: 269 KB / Downloads: 53)
What are Ad Hoc Networks
Networks with no fixed infrastructure
Mobile nodes : communicate within radio-range directly or through routers
Node mobility implies frequent change in network topology.
Rapidly deployed networks
Relatively low cost
Challenges
Use of wireless links leads ad hoc networks susceptible to link attacks
Relatively poor protection, as in battlefields
So for high survivability, distributed architecture needed.
Dynamic network topology : ROUTING
Scalable security mechanisms
Localized trust model Assumptions made
Communication between one hop neighboring node is considered to be more reliable than multi-hop communication.
Each node has atleast K-one hop legitimate neighboring nodes.
Each node is equipped with some local mechanism to identify misbehaving nodes among its one hop neighborhood.
Primary Features
Lack of infrastructure – too harsh
We assume Public key infrastructure
Certification Authority
Needs to stay on-line
Studied replication to increase availability
Use of distributed trust among group of servers
Use of Digital Signatures
Conclusions
Ad Hoc networks pose an interesting problem in networking with dynamic routing and highly insecure working environment
Need of Secure, Scalable, Reliable and Efficient algorithms for Key management and Routing