| 摘要 |
<P>PROBLEM TO BE SOLVED: To ensure security of printing data received through a network. <P>SOLUTION: An MFP 100 comprises a key forming part 153 for forming an open key and a secret key, an HDD 321 for storing related data 321A relating the open key and the secret key with an IP address in accordance with receiving a request signal containing a PC IP address, an open key transmitting part 154 for returning the open key related to the IP address, a code data receiving part 161 for receiving a code data added with the IP address through the network, a decoding part 170 for decoding the code data by the secret key related to the IP address added to the code data, and a secret key extracting part 163 for prohibiting decoding by the secret key related to the IP address in accordance with image formation of the print data decoded by an image forming part 14. <P>COPYRIGHT: (C)2007,JPO&INPIT |
