*Author for correspondence Indian Journal of Science and Technology, Vol 9(S1), DOI: 10.17485/ijst/2016/v9iS1/79442, December 2016 ISSN (Print) : 0974-6846 ISSN (Online) : 0974-5645 Secured Direction Oriented Forwarding through Minimum Amount of Edge Nodes (SDOF-MEN) Protocol for MANETS R. Suganthi* and S. Sankara Gomathi Sathyabama University, Chennai - 600119, Tamil Nadu, India; sugimanicks@gmail.com, ssgomathi@gmail.com Keywords: Base Station, Black Hole Attack, Mobile Ad-Hoc Network, Reduced Path-finding Overhead, Routing Through Edge Node, Secured Transmission Abstract Background/Objectives: A Mobile Ad-Hoc Network is formed with an assembly of mobile nodes. Efficient data transmission with security is the important requirement. Security vulnerabilities like attacks are high in MANET. One of the vital attacks is Black hole attack. Methods/Statistical Analysis: The objective of this article is to transmit data in efficient way and also in secured manner. This paper suggests a Secured Direction Oriented Forwarding through Minimum amount of Edge Nodes (SDOF-MEN) protocol for MANET. By reducing the amount of transmissions the efficiency can be improved. Secured transmission is achieved by identifying and removing Hateful nodes from the network. Findings: The SDOF-MEN Protocol is a method which selects least amount of edge nodes to communicate the data. It picks one particular verge node as following hop, and transmits data to the selected following node only. Hence the routing overhead is completely reduced. Thereby it reduces the amount of path-finding messages. With respect to the location, the information is straightly conveyed through midway nodes, hence the efficiency of the whole network is increased. Some nodes are Hateful nodes which are dropping data packets. It identifies both internal and external black hole nodes and removes from the data transmission process. Applications/Improvements: In this paper the algorithm is simulated using ns-2 simulator and analyzed by measuring the performance parameter Packet Delivery Ratio. The Packet Delivery Ratio can be enriched by removing Hateful node. 1. Introduction To make efective communication in the MANET the nodes of the network must cooperate in the communi- cation process. In MANET the communication takes place in a multi hop mode. In multi-hop MANET all the nodes are having limited energy source and so planning of the energy-efcient routing protocol is critical 1 . Te secured data routing is also difcult because some nodes are Hateful. In recent years many security concerns have been identifed and considered. For example, snooping attacks, wormhole attacks, black hole attacks 2 , packet duplication, repudiation of service (RoS) attacks, distrib- uted RoS (DRoS) attacks, especially, one of the spread security threats is the misbehavior routing problem such as black hole attacks. 1.1 Proactive (Table-driven) Protocols Te proactive direction-fnding protocol uses direc- tion-fnding tables. Tey gather facts sporadically from neighbors and saves in the table. Te tables are of diferent types. For each and every change in the network updat- ing the routing table is must. For each neighbor one entry is there. Some proactive routing protocols are analyzed in 1,3 and 4 . Te proactive routing protocol is easy for small dimension network and difcult for large network due to table maintenance. Te power consumption, Routing