2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/158692In this note we propose an encryption communication protocol which also provides database security. For the encryption of the data communication we use a transformation similar to the Cubic Public-key transformation. This method represents a many-to-one mapping which increases the complexity for any brute force attack. Some interesting properties of the transformation are also included which are basic in the authentication protocol.6 pages, 3 figuresCryptography and Securitytext