Abstract

Mobile Ad hoc Network (MANET) is a dynamic wireless network which composed of mobile nodes without any fixed infrastructure or centralized supervision. Manets are much vulnerable to security attacks because of no trusted central authority and network configuration changes dynamically due to mobility in node. Efficient and intelligent routing protocols are required for variations in network environment such as complexity, partitioning of network and size of network. In this paper we provide the characteristics of MANETs, security attacks and an overview of routing protocols to alleviate these security vulnerabilities.