Peer-to-Peer network implements a new environment in database by query processing system. Nowadays, a key challenging for processing the queries and query answering technique. In this paper we propose a research work on how query processing can be done in a P2P system efficiently by discovering the network topology, how the query can be processed in a database by using shortest path problem. Cryptographic algorithm is implemented for routing the queries in a secured manner. Compare to the previous work our proposed approach minimize the delay, fast access of queries and query routing process provide more security.