Print sheet original authentication system, printer device and checking device

1. A print sheet original authentication system comprising:

a print data creation portion for creating print data having an electronic mark added to the original data; a printer device for printing the print data on a print sheet as a print pattern; and a checking device for checking for the mark on the print sheet; wherein:

(a) the printer device comprises:

a print sheet reading sensor for reading the print pattern on a print sheet on which printing has been carried out;

a remaining mark amount detection portion for detecting the remaining mark amount from a print pattern of a read print sheet;

a generation control information creation portion for converting the remaining mark amount to generation control information;

a printing portion for printing the generation control information on the print sheet;

a cryptographic key creation portion for creating a cryptographic key used for encrypting the generation control information;

a generation control information encrypting portion for encrypting the generation control information using the cryptographic key; and

a cryptographic key output end for outputting the cryptographic key to the checking device; and

(b) the checking device comprises:

a print sheet reading sensor for reading the print pattern of the input print sheet;

a mark information checking portion for detecting the mark information on the print pattern of the read print sheet, checking the electronic mark and calculating the remaining mark amount;

generation control information detection portion for detecting the generation control information of the print pattern of the read print sheet, and extracting the remaining mark amount from said generation control information;

a remaining mark amount comparison portion for comparing the calculated remaining mark amount obtained by mark detection with the remaining mark amount extracted from the generation control information;

a cryptographic key input end which inputs the cryptographic key; and

a generation control information decrypting portion which decrypts the encrypted generation control information.

2. A print sheet original authentication system comprising:

a print data creation portion for creating print data having an electronic mark incorporated in the original data; a printer device for printing the print data on a print sheet as a print pattern; and a checking device for checking for the mark on the print sheet;

(a) wherein the printer device comprises:

a print sheet reading sensor for reading the print pattern on a print sheet on which printing has been carried out;

a remaining mark amount detection portion for detecting the remaining mark amount from a print pattern of a read print sheet;

a generation control information creation portion for converting the remaining mark amount to generation control information;

a cryptographic key creation portion which creates a cryptographic key used for converting the generation control information to an electronic mark pattern;

a generation control information mark conversion portion for converting the generation control information to an electronic mark pattern using the cryptographic key; and

a cryptographic key output end which outputs the cryptographic key to the checking device; and

a printing portion for printing the generation control information on the print sheet;

(b) wherein the checking device comprises:

a print sheet reading sensor for reading the print pattern of the input print sheet;

a mark information checking portion for detecting the mark information on the print pattern of the read print sheet, checking the electronic mark and calculating the remaining mark amount;

generation control information detection portion for detecting the generation control information of the print pattern of the read print sheet, and extracting the remaining mark amount from said generation control information;

a remaining mark amount comparison portion for comparing the calculated remaining mark amount obtained by mark detection with the remaining mark amount extracted from the generation control information;

a cryptographic key input end which inputs the cryptographic key; and

a generation control information detection portion which detects the generation control information read as the electronic mark pattern using the cryptographic key and extracts the recorded remaining mark amount.

3. A print sheet original authentication system comprising:

a print data creation portion which creates print data having electronic mark information incorporated in the original data; a printer device which prints the print data on a print sheet as a print pattern; a checking device which checks the mark on the print sheet; and a generation control information server for sending and receiving the generation control information of the print sheet between the printer device and the checking device wherein,

the printer device detects the remaining mark amount of the print pattern on the print sheet which was read, and converts the remaining mark amount to generation control information; and

links a unique ID for the print sheet with the generation control information and outputs them to an external server; and

the generation control information server links the ID and the generation control information and stores them; and

the checking device calculates the remaining mark amount of the print pattern on the print sheet which was read, and also detects the ID and retrieves the generation control information from the external server, then extracts the remaining mark amount from the generation control information; and

compares the calculated remaining mark amount with the remaining mark amount extracted from the generation control information.

4. A print sheet original authentication system comprising:

a print data creation portion which creates print data having electronic mark information incorporated in the original data; a printer device which prints the print data on a print sheet as a print pattern; a checking device which checks the mark on the print sheet; and a generation control information server for sending and receiving the generation control information of the print sheet between the printer device and the checking device wherein:

the printer device comprises:

a print sheet reading sensor for reading the print pattern on a print sheet on which printing has been carried out;

a remaining mark amount detection portion for detecting the remaining mark amount from a print pattern of a read print sheet;

a generation control information creation portion for converting the remaining mark amount to generation control information;

an ID creation portion for creating a unique ID for each print sheet;

a printing portion for printing the ID on the print sheet;

a generation control information output end for linking the ID and the generation control information and outputting them to the generation control information server; and

the generation control information server links the ID and the generation control information and stores them; and

the checking device comprises:

a print sheet reading sensor for reading the print pattern of the input print sheet;

a mark information checking portion for detecting the mark information from the print pattern of the read print sheet, checking the electronic mark and calculating the remaining mark amount;

an ID detection portion for detecting the ID from the print pattern read by the print sheet reading sensor;

an ID transmission end for sending the detected ID to the generation control information server and for requesting retrieval of the generation control information;

a generation control information receiving end for receiving the generation control information corresponding to the ID sent from the generation control information server;

a generation control information retrieval portion for extracting the remaining mark amount from the retrieved generation control information; and

a remaining mark amount comparison portion for comparing the calculated remaining mark amount obtained by mark detection with the remaining mark amount extracted from the generation control information.

5. A checking device for carrying out mark checking of a print sheet having printed as a print pattern thereon, print data having an electronic mark incorporated in the original data and a unique ID for each print sheet, the checking device comprising:

a print sheet reading sensor for reading the print pattern of the input print sheet;

a mark information checking portion for detecting the mark information from the print pattern of the read print sheet, for checking the electronic mark and for calculating the remaining mark amount;

an ID detection portion for detecting the ID of the print pattern read by the print sheet reading sensor;

an ID transmission end for sending the detected ID to an external server and for requesting retrieval of the generation control information;

a generation control information receiving end for receiving the generation control information corresponding to the ID sent from the external server;

a generation control information retrieval portion for extracting the remaining mark amount from the retrieved generation control information; and

a remaining mark amount comparison portion for comparing the calculated remaining mark amount obtained by mark detection with the remaining mark amount extracted from the generation control information.