| 摘要 |
PURPOSE:To exactly ensure security by preventing the content of security objective data existing in a spool queue from being known even when the third person tries to look in at the security objective data through a display or the like. CONSTITUTION:A print data preparing device 1 is equipped with a ciphered data preparing part 12 which ciphers print data, adds a user ID, key code, and ciphered ID to the ciphered data, and transfers the data to a printer side. A printer 2 is equipped with a ciphered data deciphering part 23 which deciphers the ciphered data based on the user ID or the like. The ciphered data transferred to the printer 2 are temporarily stored in a spool queue 22, and at the time of printing, the ciphered data are deciphered by the ciphered data deciphering part 23, and outputted, only when a pass word is matched. The ciphered data are stored in the spool queue 22, so that only the lump of the meaningless data can be seen even when the third person tries to look in at the content, and the content of the print data can be prevented from being known. |
