A method of security-processing and outputting spool data in a printing system, and an apparatus therefor

PURPOSE: A method and a device for processing security of spool data and outputting the spool data of a printing system are provided to transmit the spool data generated from a computer to a local printer after a transmitting side performs a security process, and enable a receiving side to output the spool data by releasing the security. CONSTITUTION: The printing system is equipped with a user computer(300), a communication network(400), a remote printing computer(500) allowing connection of the user computer through the communication network, and the local printer(600) matched with the remote printing computer. The user computer comprises an output executing/spool data generating module(310), an encrypting module(320), a compressing module(330), and a database(340). The remote printing computer comprises a decompressing module(510), a decrypting module(520), a watermark module(530), and a printer managing protocol(540).