Web services is become major issue in distributed data mining. In the literature we can found a number of proposals of privacy preserving which can be divided into two major categories that is trusted third party and multiparty based privacy protocols. In case of the trusted third party privacy protocol models the conventional asymmetric cryptographic based techniques or algorithms will be used and in case of the multi party based protocols data perturbed technique can be used to ensure no other party to understand original data. In order to improve security features by combining strengths of both the above said models in this work, we propose to use data perturbed techniques in third party privacy preserving protocol to conduct the secure web service. In order to perform web service we propose third party protocol for secure computations. Our results shown that although the data are disguised and decentralized, our method can still achieve literally high accuracy.