US 12,438,852 B2
Communication device and non-transitory computer-readable recording medium storing computer-readable instructions for communication device
Hiroyuki Sasaki, Chita (JP)
Assigned to BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed by BROTHER KOGYO KABUSHIKI KAISHA, Nagoya (JP)
Filed on Nov. 16, 2023, as Appl. No. 18/511,997.
Claims priority of application No. 2022-188113 (JP), filed on Nov. 25, 2022.
Prior Publication US 2024/0179136 A1, May 30, 2024
Int. Cl. H04L 9/40 (2022.01); H04L 9/16 (2006.01)
CPC H04L 63/0428 (2013.01) [H04L 9/16 (2013.01); H04L 63/166 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A first communication device, wherein
the first communication device supports a first version of an encrypted communication protocol and a second version of the encrypted communication protocol, the second version being newer than the first version,
the first version is capable of using a first encryption scheme,
the second version is capable of using the first encryption scheme and a second encryption scheme which is more secure than the first encryption scheme,
the first communication device comprises a controller, and
the controller is configured to:
obtain a setting request related to the encrypted communication protocol;
after the setting request has been obtained, send setting information according to the setting request to a second communication device; and
after the setting information has been sent to the second communication device, execute an encrypted communication with the second communication device by using a version and an encryption scheme that were determined by the second communication device based on the setting information,
wherein in a case where a first setting request not including first version information indicating the first version but including second version information indicating the second version is obtained, the controller is configured to send first setting information to the second communication device, the first setting information including the second version information and second scheme information indicating the second encryption scheme but not including first scheme information indicating the first encryption scheme, and
in a case where a second setting request including the first version information and the second version information is obtained, the controller is configured to send second setting information to the second communication device, the second setting information including the first version information, the second version information, the first scheme information, and the second scheme information.