A method of printing a document includes generating commands in a computing device that include: (i) commands for printing based on document data, and (ii) an identification of a determined portion of the document data that is to be used in generating a printed copy detection pattern. The method further includes sending the printer control commands to an intermediate electronic device that stores a key, generating copy detection pattern data using the determined portion of the document data and the cryptographic key, and generating modified printer control commands that include commands for printing a first document portion based on the document data and a second document portion including the printed copy detection pattern based on the copy detection pattern data. Finally, the modified printer control commands are sent to a printing device. Also, a system is provided for implementing the method.