Defending collaborative attacks in MANETs using Modified Cooperative Bait Detection Scheme

Mobile Adhoc Networks are the most needed technology which is still under research. The wired networks cannot be used during any emergency situation like natural disasters hence the need of wireless technology is increased. MANET makes the communication easier during the emergency situation. Because of the characteristics of MANET such as infrastructure less and dynamic topology, it is easy to deploy whenever and wherever needed. Such features make it more suitable for many applications. However the flexibility of these characteristic creates the security threats. The nodes in the network can be easily attacked by collaborative attacks such as black hole attack, gray hole attack and jellyfish attacks. These are the most serious attacks which drops the packet without transmitting. Hence a secure mechanism is needed. This paper proposes a technique called Modified Cooperative Bait Detection Scheme. It is more suitable for defending against collaborative attacks. CBDS along with Destination Sequenced Distance Vector Protocol performs better than the DSR and 2ACK scheme.