Image forming apparatus establishes reconnection with terminal device using identification information so that communication with the terminal device is resumed

A terminal device comprising:

• a controller;
• a storage;
• and
• a communicator, wherein
• the controller
• establishes a connection with an image-forming apparatus through the communicator using Quick User Datagram Protocol (UDP) Internet Connections (QUICs),
• stores, in the storage, identification information for identifying the connection and key information to be used for encryption of transmission-reception information transmitted to and received from the image-forming apparatus,
• communicates the transmission-reception information with the image-forming apparatus through Hypertext Transfer Protocol (HTTP)/3, and
• establishes, when the connection with the image-forming apparatus is disconnected, a reconnection with the image-forming apparatus using the identification information to resume the communication of the transmission-reception information with the image-forming apparatus.

A method for controlling an image-forming apparatus, the method comprising:

• establishing a connection with a terminal device using Quick User Datagram Protocol (UDP) Internet Connections (QUICs);
• storing identification information for identifying the connection and key information to be used for encryption of transmission-reception information transmitted to and received from the terminal device;
• communicating the transmission-reception information with the terminal device through Hypertext Transfer Protocol (HTTP)/3;
• and
• establishing, when the connection with the terminal device is disconnected, a reconnection with the terminal device using the identification information to resume the communication of the transmission-reception information with the terminal device.

A method for controlling a terminal device, the method comprising:

• establishing a connection with an image-forming apparatus using Quick User Datagram Protocol (UDP) Internet Connections (QUICs);
• storing identification information for identifying the connection and key information to be used for encryption of transmission-reception information transmitted to and received from the image-forming apparatus;
• communicating the transmission-reception information with the image-forming apparatus through Hypertext Transfer Protocol (HTTP)/3;
• and
• establishing, when the connection with the image-forming apparatus is disconnected, a reconnection with the image-forming apparatus using the identification information to resume the communication of the transmission-reception information with the image-forming apparatus.