Printing system, encryption key change method, printer, and program

A printing system comprising:

• a program of a printer driver installed on a server to be executed;
• and
• printers, wherein
• the printing system encrypts at least part of a print job and transmits the print job from the printer driver to the printer,
• the printer includes
• a setting unit configured to receive a setting of a new encryption key,
• a storage unit in which an encryption key is stored,
• a second encryption unit configured to generate default encryption key information obtained by encrypting a default encryption key common to the same model, the default encryption key being stored in the storage unit, with the new encryption key set by the setting unit,
• a search unit configured to search a network for a printer of the same model as the printer itself, and
• a notification unit configured to notify the printer driver on the server of apparatus information. identifying the printer detected by the search and the default encryption key information,
• the program of the printer driver
• acquires the new encryption key,
• changes, to the new encryption key, an encryption key to be used for encryption of a print job to be transmitted to the printer indicated in the notified apparatus information,
• decrypts the notified default encryption key information with the new encryption key,
• generates new encryption key information obtained by encrypting the new encryption key with the default encryption key obtained by the decryption, and
• transmits the new encryption key information to the printer indicated in the apparatus information, and
• the printer further includes
• a receiving unit configured to receive the new encryption key information,
• a decryption unit configured to decrypt the new encryption key information with the default encryption key, and
• a change unit configured to change an encryption key to be used for decryption of a print job to the encryption key obtained by decrypting the new encryption key information.

An encryption key change method for changing an encryption key to be used for encryption and decryption in a printing system that encrypts at least part of a print job and transmits the print job from a printer driver on a server to a printer, the method comprising:

• causing the printer to
• receive a setting of a new encryption key,
• generate new encryption key information obtained by encrypting the new encryption key with a default encryption key common to the same model,
• search a network for a printer of the same model as the printer itself,
• transmit the new encryption key information to the printer detected by the search, and
• notify the printer driver on the server of apparatus information identifying the printer detected by the search;
• causing the printer that has received the new encryption key information to decrypt the new encryption key information with the default encryption key, acquire the new encryption key, and change an encryption key to be used for decryption of a print job to the new encryption key;
• and
• causing the printer driver on the server to
• acquire the new encryption key, and
• change, to the new encryption key, an encryption key to be used for encryption of a print job to be transmitted to the printer indicated in the notified apparatus information.

An encryption key change method for changing an encryption key to be used for encryption and decryption in a printing system that encrypts at least part of a print job and transmits the print job from a printer driver on a server to a printer, the method comprising:

• causing the printer to
• receive a setting of a new encryption key,
• generate default encryption key information obtained by encrypting a default encryption key common to the same model with the new encryption key,
• search a network for a printer of the same model as the printer itself, and
• notify the printer driver on the server of apparatus information identifying the printer detected by the search and the default encryption key information;
• causing the printer driver on the server to
• acquire the new encryption key,
• change, to the new encryption key, an encryption key to be used for encryption of a print job to be transmitted to the printer indicated in the notified apparatus information,
• decrypt the notified default encryption key information with the new encryption key,
• generate new encryption key information obtained by encrypting the new encryption key with the default encryption key obtained by the decryption, and
• transmit the new encryption key information to the printer indicated in the apparatus information;
• and
• causing the printer that has received the new encryption key information to decrypt the new encryption key information with the default encryption key, acquire the new encryption key, and change an encryption key to be used for decryption of a print job to the new encryption key.