Method for encryption and authentication of a data signal

摘要

Applicable to an alarm console (1) that performs bidirectional communication by means of TCP/IP between one or several alarm switches (2) and a receiver switch (3). The encryption process includes a frame size measurement; a wildcard characters insertion; an algorithm encryption; a frame consistency verification; and a wildcard character modification in case that any error is detected. The authentication process has an authentication by user number; an authentication by IP and port address; and a temporal authentication.