A Review on Black Hole Attack in MANETs

Wireless networks are gaining popularity now days, as the users require wireless connectivity irrespective of their geographic position. There is an increasing threat of attacks on MANETs. Black hole attack is a security threat in which the packet is redirected to a node that actually does not exist in the network. It’s an analogy to the black hole in the universe in which things disappear. In black hole attack malicious node uses its routing protocol in order to advertise itself for having the shortest path to the destination node or to the packet it wants to intercept. MANETs should have a secure way for transmitting packet or information over a network which is quite challenging and vital issue. In this paper, a review on different existing techniques for detection of black hole attacks with there defects is presented.