Biblio
Mobile ad hoc network (MANET) is an infrastructure less, self organizing on demand wireless communication. The nodes communicate among themselves through their radio range and nodes within the range are known as neighbor nodes. DSR (Dynamic Source Routing), a MANET reactive routing protocol identify the destination by transmitting route request (RREQ) control message into the network and establishes a path after receiving route reply (RREP) control messages. The intermediate node lies in between source to destination may also send RREP control message, weather they have path information about that destination is present into their route cache due to any previous communication. A malicious node may enter within the network and may send RREP control message to the source before original RREP is being received. After receiving RREP without knowing about the destination source starts to send data and data may reached to a different location. In this paper we proposed a novel algorithm by which a malicious node, even stay in the network and send RREP control message but before data transmission source can authenticate the destination by applying PGP (pretty Good Privacy) encryption program. In order to design our algorithm we proposed to add an extra field with RREQ control message with a unique index value (UIV) and two extra fields in RREP applied over UIV to form a random key (Rk) in such a way that, our proposal can maintained two way authorization scheme. Even a malicious node may exists into the network but before data transmission source can identified weather RREP is received by the requested destination or a by a malicious node.
Mobile Ad-hoc Network (MANET) is an autonomous collection of mobile nodes and communicate among them in their radio range. It is an infrastructure less, bandwidth constraint multi-hop wireless network. A various routing protocol is being evolved for MANET routing and also provide security mechanism to avoid security threads. Dynamic Source Routing (DSR), one of the popular reactive routing protocols for MANET, establishes path between source to destination before data communication take place using route request (RREQ) and route reply (RREP) control messages. Although in [1] authors propose to prevent route diversion due to a malicious node in the network using group Diffie-Hellman (GDH) key management applied over source address, but if any intermediate trusted node start to misbehave then there is no prevention mechanism. Here in this paper, we applied Hash function scheme over destination address to identify the misbehaving intermediate node that can provide wrong destination address. The path information towards the destination sent by the intermediate node through RREP is exactly for the intended required destination or not, here we can identified according to our proposed algorithm and pretend for further data transmission. Our proposed algorithm proves the authenticity of the destination and also prevent from misbehaving intermediate nodes.
Mobile Ad-hoc Network (MANET) comprise of independent ambulant nodes with no any stable infrastructure. All mobile nodes are co-operatively transfer their data packets to different mobile nodes in the network. Mobile nodes are depends on intermediate nodes when transmission range beyond limit i.e. multi hop network. As MANET is a highly dynamic network, mobile nodes can leave and join a network at anytime. Security is the biggest issue in MANET as MANET is infrastructure-less and autonomous. In MANET, correspondence between two mobile nodes is performed by routing protocols wherein every versatile node can make directly communication with other versatile node. In the event that both portable nodes are inside a transmission range of each other, then they can straightforwardly make communication with each other. Otherwise, transmission is done through the intermediate node. The nature of its wireless nature is also additionally turns into the purpose of its greatest vulnerability. In this manner, diminishing the confidence level of the system as it appropriate to availability, integrity, reliability and privacy concerns. There are different routing protocols for providing security that are designed based on various cryptographic techniques. To obtain a rapid knowledge of security design, we are giving a review on different cryptographic techniques to secure MANET. In this review, we presents security techniques and protocols related to cryptographic techniques.