The main objective of this paper is to study about various cryptographic techniques such as modified ECC and DSA based ECGDSA to enhance the data transfer security within the MANET systems. Both the algorithms will exhibit with the key size of 512 bits. The research in this paper is carried out. To analyze various challenges of MANETs based on their issues in key size generation, time taken for key generation, packet delivery ratio and its throughput. To compare and investigate the performance

more »

... f various hybrid algorithms such as RSA, ECC and modified ECC and DSA based ECGDSA. To reduce the DoS attacks based on secure hybrid authentication protocol. MANET is a self configurable network of mobile routers connected without wires. MANET nodes cooperate to provide many wireless services and connectivity. The application program of this wireless network topology is restricted due on certain mobile ad hoc characteristics. MANETs are faced with certain attacks or threads due to lack of centralized operation.. Keywords: MANET (Mobile Ad hoc NETwork), multi hop network, ECKCDSA (Elliptic curve Korean Certificate Based Digital Signature Algorithm), The Blind Digital Signature (BDS).