REST API safety assurance by means of HMAC mechanism

The HMAC mechanism that enables authentication REST services and assures their integrity, non-repudiation and confidentiality, has been presented in this article. A demonstration Restful API has been implemented using Slim Framework, in which several endpoints for login, test route available only for registered users and authenticated by means of HMAC mechanism, have been assigned. The solution proposed here suggests an alternative that is easy to implement compared to other well-known methods of authentication and authorization.