Safety is a real concern for computer systems. Many mechanisms have been trialed, among which the Diffie-Hellman (DH). Though DH has been effective to some extent, flaws have been detected and even alternatives have been proposed. It is within this framework that a new model has been designed-the S-WANE model. Various researches have validated this model. In the present work, we carry out a comparative study between DH and S-WANE. To that end, we studied the two mechanisms. Analytical and experimental validations have shown the advantages of S-WANE over DH. Its advantages could be assessed in terms of robustness to some attacks such as “The-Man-in-the Middle”. Thus, we have proposed S-WANE as an alternative to replace DH everywhere the latter is used.