International Research Publication House (IRPH)
The requirement of today is to provide secure and reliable communication of MANETs. So there is need for Key management and authentication is the central aspects of providing security in MANETs so these should not be weak. Security has no much issue for a small network but when number of mobile nodes is large and flexible then security must be provided at a large extent. PKI, PGP and SPGP play the vital role in terms of the security. It is easy to manage the security of a fixed network but for a mobile and dynamically changing network it is very difficult.