Abstract: Wireless mobile Ad Hoc Networks (MANETs) are gaining popularity in the area of mobile computing. MANETs face security problems because of their unique characteristics like mobility, dynamic topology and lack of central authority and infrastructure support. In traditional networks, deploying a powerful and reliable security scheme such as Public Key Infrastructure (PKI) needs a central authority or trusted third party to ensure fundamental security services including digital certificates, authentication and encryption methods. In the proposed scheme, a secure identity-based anonymous and authentication scheme is proposed for networks without any PKI and a cost-effective light weight encryption scheme for ensuring confidentiality is also proposed.

Keywords: Authentication, Encryption, MANET, P-coding, Forward security.