Hybrid cryptographic algorithm based key management scheme in MANET Valanto Alappatt a,⇑ , P.M. Joe Prathap b a Faculty of Computer Science and Engineering, Sathyabama Institute of Science and Technology, Chennai, India b Department of Information and Technology, RMD Engineering College, Chennai, India article info Article history: Received 21 September 2020 Accepted 28 September 2020 Available online xxxx Keywords: MANET Multipath routing AOMDV Diffie–Hellman key exchange Elliptic curve cryptography Clustering Low Energy Adaptive Clustering Hierarchy abstract In the recent networking era, Mobile Adhoc Network has been popular as it effectively solves the limita- tions that were pertaining with single path routers. Multi-path mobile adhoc networks (MANETs) have various advantages which include high throughput, lower time complexity and high energy efficiency. The major challenges here are the key management and secured way of routing. Secure routing ensures data integrity, confidentiality, authorization and authentication and non-repudiation. These require- ments are satisfied only by cryptographic algorithms. Key management is the most essential one in cryp- tography. The management of keys which is integrated with the protocol start with trusted and network with more authentication. In order to ensure the secured broadcasting in MANET, here we proposed a secured multipath routing mechanism for reliable data transmission using cryptographic algorithms. In our proposed method, we are hybridizing the popular Diffie-Hellman method of key exchange and elliptic curve cryptography (HDHECC). First, the nodes are subjected to clustering using the LEACH pro- tocol and the cluster head selection process will be carried out with the help of weight of each node. Here the trust mechanism will be done by using the AOMDV. For the management of keys, every head of the cluster is made to retain its public key of the corresponding member nodes and are made to act only as a router. The proposed technique solves the overhead of the centralized management of keys. Moreover, the requirement to store all the public keys. The propose method is tested for its performance by evalu- ating the end-end delay, Packet delivery ratio and packet losses. The implementation is carried out using the NS2 simulator. Ó 2020 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the Emerging Trends in Materials Science, Technology and Engineering. 1. Introduction In case of wireless sensor networks, when the node enters the ad-hoc mesh confusion occurs. The network is exposed to unau- thorized access in the absence of a centralized controlling unit for important processes such as the routing and forwarding. Secu- rity is more important in case of these networks. Also, an impor- tant overhead to be considered is the dynamic nature of these nodes. In MANETs, all the nodes perform both transmission and receiving functions. Different nodes in the network are connected both in internal and external means. An interface is normally used to connect the MANET and the routers. The nodes then are connected with the routers using the classical IPs. Every node here acts as a host of another network by information collection on the properties of a classical IP. MANETS are generally the wireless sensor networks which nei- ther rely on the fixed terms of infrastructure or as an admin. The WSNs are resource constrained [1] where the nodes in source delivers the packet to the proposed destination using multiple hops. In the process of using the multi-hopped network, the impor- tant thing to be remembered is to explore the routes which allow the concerned packet to reach the destination within a stipulated time. It has also become more essential for making sure that the nodes present as intermediate are co-operative to each other [2]. The other aspect of WSNs is to ensure that the energy and load are well balanced during the entire course of transmission [3]. The load balancing is a process where the workload among multiple networks is optimized for less usage of resources to avoid the overloading [4–5]. The intrinsic nature of WSNs causes more https://doi.org/10.1016/j.matpr.2020.09.788 2214-7853/Ó 2020 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the Emerging Trends in Materials Science, Technology and Engineering. ⇑ Corresponding author. E-mail addresses: valantoalappat@gmail.com (V. Alappatt), drjoeprathap@gmail. com (P.M. Joe Prathap). Materials Today: Proceedings xxx (xxxx) xxx Contents lists available at ScienceDirect Materials Today: Proceedings journal homepage: www.elsevier.com/locate/matpr Please cite this article as: V. Alappatt and P.M. Joe Prathap, Hybrid cryptographic algorithm based key management scheme in MANET, Materials Today: Proceedings, https://doi.org/10.1016/j.matpr.2020.09.788