Hybrid Cryptography Algorithms for Enhanced Adaptive Acknowledgment Secure in MANET

The mobile adhoc network is a group of mobile nodes without having the fixed infrastructure.Due to the infrastructure less network and distributed nature, make mobile adhoc network susceptible to malicious attackers.So, we use an intrusion detection system called Enhanced Adaptive ACKnowledgement (EAACK) especially for mobile adhoc networks.Based on the digital signature algorithm (DSA) and RSA the EAACK is designed.To enhance the strength of the security in the mobile adhoc networks, we introduce an innovative approach called Hybrid Security Protocol that provides integrity, confidentiality and authentication.This Hybrid Security Protocol consists of Cryptography based on Elliptic curve, Dual-RSA algorithm and Message Digest MD5.Encryption is achieved by using Elliptic Curve Cryptography, Dual-RSA algorithm for authentication and MD-5 for integrity.By using a combination of both symmetric and asymmetric cryptographic techniques, we achieve better security with integrity.