Evaluation and Modelling of Secured Protocols’ Spent Transmission Time

In data communication network, one of the ideal network procedures is to transmit files securely from sender to a receiver. However, security alone without speed is not sufficient. In this paper, two network characteristics of an ideal file transfer, security and speed are considered. Using Wireshark network analyzer, we investigate, compare, and finally model the spent transmission time of the same size file between two encrypted WinSCP's protocols, the Secure File Transfer Protocol, and the Secure Copy Protocol. In terms of speed in transferring files, experiment results show that, while retaining the same file size and security integrity, Secure File Transfer Protocol performs faster than its counterpart Secure Copy Protocol does. In order to predict the SFTP protocol speed in transferring files from the slower SCP, a polynomial model of order of three is proposed with a square correlation coefficient of 0.5207.