Printing device and method for secure printing

摘要

A printer is communicatively connected to a terminal and a slave. The printer creates a secure printing group, and allows the terminal and slave to join the secure printing group. The terminal generates a print job, and sends the print job to the printer. The printer generates a first inspection message according to the print job, and sends the first inspection message to the terminal. The terminal selects the slave as a printing delegate, and sends a message that is derived at least in part from the first inspection message to the slave. The slave sends a second inspection message to the printer, wherein the second inspection message is derived at least in part from the message sent from to the terminal to the slave, and requests the printer to execute the print job. The printer executes the print job when the second inspection message matches the first inspection message.

主权项

1. A secure printing method of a terminal device and a slave device communicatively connected to a printing device, the secure printing method comprising:
the printing device creating a secure printing group; the terminal device and the slave device requesting the printing device to join the secure printing group; the printing device allowing the terminal device and the slave device to join the secure printing group; the terminal device generating a print job, and sending the print job to the printing device; the terminal device receiving a first inspection message from the printing device; the terminal device selecting the slave device in the secure printing group as a printing delegate, and sending a message to the slave device, wherein the message to the slave device is derived at least in part from the first inspection message; the slave device sending a second inspection message to the printing device when the slave device is near the printing device, and requesting the printing device to execute the print job, wherein the second inspection message is derived at least in part from the message sent from the terminal device to the slave device; wherein the first inspection message comprises a first identifier of the print job and a first token corresponding to the first identifier of the print job, and the second inspection message comprises a second identifier of the print job and a second token corresponding to the second identifier of the print job; wherein the terminal device sending a message to the slave device comprises the terminal device sending only the first identifier of the print job to the slave device and a user entering the first token of the print job to the slave device; the printing device determining whether the second inspection message matches the first inspection message; and the printing device executing the print job on a condition that the second inspection message matches the first inspection message.