Implementation of Trivial File Transfer Protocol (TFTP) in embedded system is significant because of the speed and simplicity. However, no security service in TFTP marks its major limitations. In this work, a pre-shared Diffie Hellman Key Exchange (DHKE) technique was proposed for mutual authentication to achieve the same secret key in TFTP communication protocol. We also integrated the system with feasible compression and encryption process to significantly improve the TFTP communication performance. The DHKE proof of concept is discussed briefly to show the feasibility of the pre-shared technique on the protocol. Also, the experiment was performed on constrained embedded devices to analyse the performance of compression/encryption scheme in TFTP. From the results obtained, the combined encryption and compression process is able to reduce the time by about 30% compared to the original file transmission time. Thus, the proposed work presents both advantages to reduce file size and provide security for the data. This is a preliminary work to provide a secure TFTP communication which has benefits to be implemented in embedded system field and IoT services.