Method for the secure transmission of operating data

The invention relates to a method used for transmitting operational data in a machine (1) in the printing industry to at least a supervisory computer (9) accessible through a public communication network (6) by means of the public addressable communication network (6). The method is characterized in that the operational data in the machine (1) in the printing industry is stored in the form of code. in at least one computer (2) with which the machine (1) is equipped. The operational data in the form of code is transmitted to the supervisory computer (9) through the public addressable communication network (6), and is stored in the supervisory computer (9).