MANET (mobile ad hoc network) is considered to be a network with no centralized control. This network typically
faces two major challenges related to routing and security. Both these issues affect the performance of this network to a large
extent. The black hole attack belongs to the category of active attacks that are launched to reduce the network throughput and
other parameters. The research works carried out in the past used different techniques to isolate malicious nodes, but with the
inclusion of extra hardware and software tools. The various techniques for the security in MANET are analyzed in terms of
certain parameters.
