Print method and print system for image forming device that prints re-encrypted and re-decrypted data

1. A print method for using an image forming device to print an encrypted file transmitted from a terminal device, the terminal device and the image forming device being connected to a server device via a predetermined network, the print method comprising:

receiving a password of the encrypted file by the image forming device;

generating a job print notification with the received password included therein;

transmitting the job print notification from the image forming device to the server device;

generating normal data by decrypting the encrypted file stored in the server in advance of the job print notification using the password included in the received job print notification transmitted from the image forming device and converting the decrypted file into the normal data by the server device;

generating a re-encrypted file using the received password transmitted from the image forming device, by the server device, by re-encrypting the normal data, the re-encrypted file being set so as to restrict print processing;

based on an operation of a user with respect to the image forming device, generating the normal data by re-decrypting the re-encrypted file using the received password and converting the decrypted file into normal data by the image forming device; and

printing the normal data using the image forming device.

2. A print system for using an image forming device to print an encrypted file transmitted from a terminal device, the terminal device and the image forming device being connected to a server device via a predetermined network, the print system comprising:

a first receiving part that receives a password of the encrypted file and generates a print job notification with the received password included therein, the first receiving part being included in the image forming device, the password being input by the user;

a decryption part that generates normal data by decrypting the encrypted file stored in the server in advance of the job print notification using the password included in the print job notification received from the first receiving part and converting the decrypted file into the normal data, the decryption part being included in the server device;

a restriction setting part that, based on the normal data, generates a re-encrypted file using the password received from the first receiving part, by the server device, by re-encrypting the normal data, the re-encrypted file being set so as to restrict print processing;

a restriction releasing part that, based on an operation of a user with respect to the image forming device, generates the normal data by re-decrypting the re-encrypted file using the received password and converting the decrypted file into normal data; and

a print part that causes the image forming device to print the normal data.

3. The print system according to claim 2 , wherein

the first receiving part receives a logon password input by the user to log on to the image forming device;

the re-encryption part re-encrypts the normal data using the logon password, and

the re-decryption part re-decrypts the re-encrypted file using the logon password.

4. The print system according to claim 2 , wherein

the terminal device includes a first transmission part that transmits the encrypted file to the server device,

the server device includes:

a first reception part that receives the encrypted file;

a storage part that stores the encrypted file; and

a second transmission part that transmits, to the image forming device, notification data notifying the image forming device of the encrypted file,

the image forming device further includes;

a second reception part that receives the notification data; and

a third transmission part that transmits the password,

the server device includes:

a third reception part that receives the password;

the decryption part;

the re-encryption part; and

a fourth transmission part that transmits the re-encrypted file to the image forming device,

the image forming device further includes:

a fourth reception part that receives the re-encrypted file;

the re-decryption part; and

the print part.

5. The print system according to claim 4 , wherein

the second transmission part

transmits the notification data to the image forming device and

transmits to the terminal device a notification prompting the user to operate with respect to the image forming device.