Proxy server is an important communication agent for secure communication between a client and a proxy server. The usage of a proxy server cannot be limited to Local Area Network (LAN). It can also be used on a Wide Area Network (WAN). To enhance the security of communication between clients and servers we proposes a secure model to made communication between client and proxy server more secure by using encryption algorithms. We test different encryption algorithms and found that Advanced Encryption Standard (AES) provides more secure communication between a client and a proxy Server. Simulation results show that the proposed scheme performs better in case of using AES as compared to other encryption algorithms. We conclude that the proposed model enables secure communication among user and proxy server.