Abstract: In MANET communication plays a vital role in situations like natural calamities etc. It is more vulnerable to security issues since it does have fixed infrastructure. MANET is a collection of mobile nodes that forms a temporary network. One of the security issues is packet dropping. The dropping of packet may be caused due to link failure or malicious node present in the network. The most common attack in MANET is the black-hole attack. Ad-Hoc on demand distance vector (AODV) is prone to packet dropping attack. This paper presents a new protocol implementation named as Secure Geographic Routing (SGR) which deals with packet dropping in network layer. It also detects and prevents packet dropping.

Keywords: MANET, AODV, black hole attack, SGR.