To provide a high security mechanism by masking print data according to an image forming apparatus which performs an output.
The image forming apparatus transmits logged-in user identification information to a print management device, and makes an output request for print data corresponding to the user identification information. The image forming apparatus accepts the masked print data corresponding to the user identification information from a print management server according to the output request, and prints the masked print data. The print management server determines whether or not to mask the print data according to first mask information for determining the masked region of the print data to be specified according to the address of the image forming apparatus, and when it is determined that the print data should be masked, the print management server generates the print data by masking the print data, and outputs the print data to the image forming apparatus which has made the output request.
KIMURA ISAO
HONDA TOMOKO
