Abstract: Today mobile, wireless and non-static networks are getting more and more important as these are triggering the development of next generation networks to support mobile devices are bridging the border to traditional, static networks such as the internet. In public key storage management problem have arisen, because the key computation is still having high overhead and the potential threats of the key outflow or loss. In this research work, it is proposed a model approach of Effective Trust Model (ETM) to combine trust models and encrypt public key certificate which utilizes Ad Hoc on demand Trusted Distance vector (AOTDV) and are capable of operating without the support of any fixed infrastructure in Mobile Ad Hoc Networks (MANETs). Trust models essentially needed in order to establish reliable and high-performance communications. On-demand routing protocol is widely developed in ad hoc networks because of its effectiveness and efficiency. In this paper, the significance of Ad hoc On-Demand Trusted Distance Vector (AOTDV) routing protocol decreases the routing overload and end to end delay. This work concentrates implementation of identification and prevention of malicious nodes and message tampering attacks, using a semantic security mechanism.