US 12,120,511 B2
Communication system transmitting encrypted data
Yuto Misawa, Kawasaki (JP)
Assigned to Kabushiki Kaisha Toshiba, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki (JP)
Filed by KABUSHIKI KAISHA TOSHIBA, Tokyo (JP); and Toshiba Infrastructure Systems & Solutions Corporation, Kawasaki (JP)
Filed on Sep. 1, 2021, as Appl. No. 17/464,189.
Application 17/464,189 is a continuation of application No. PCT/JP2020/008472, filed on Feb. 28, 2020.
Claims priority of application No. 2019-038375 (JP), filed on Mar. 4, 2019.
Prior Publication US 2021/0400484 A1, Dec. 23, 2021
Int. Cl. H04W 12/06 (2021.01); H04W 12/037 (2021.01); H04W 12/041 (2021.01); H04W 12/0471 (2021.01); H04W 12/069 (2021.01)
CPC H04W 12/069 (2021.01) [H04W 12/037 (2021.01); H04W 12/041 (2021.01); H04W 12/0471 (2021.01)] 2 Claims
OG exemplary drawing
 
1. A communication system comprising:
a plurality of first communication control devices constituting a mesh network connected between a first device and a network communication network;
a second communication control device connected between a second device and the network communication network; and
a data memory storing a key and a certificate to indicate that each of the first communication control devices is authenticated,
the first communication control devices each including:
a wireless communication unit configured to perform wireless communication; and
a controller configured to, when receiving data to be transmitted via the wireless communication unit from the first device to the second device, determine a communication path in the mesh network to transmit the data to the network communication network from the first communication control device that receives the data, perform mutual authentication with the second communication control device communicating via the communication path and the network communication network, and thereafter transmit encrypted data obtained by encrypting the data to the second communication control device,
wherein the controller of the first communication control device that receives the data from the first device encrypts the data to be transmitted from the first device to the second device using a common key determined by the mutual authentication with the second communication control device, the controller being configured to perform mutual authentication among the first communication control devices in the communication path based on the key and the certificate stored in the data memory, wherein
when the communication path in the mesh network has been determined, the controller performs mutual authentication among the first communication control devices in the communication path, and communicates with the second communication control device via the communication path and the network communication network, after the mutual authentication among the first communication control devices in the communication path succeeds; wherein the controller acquires device-specific information from the first device via the wireless communication unit, and receives the data to be transmitted from the first device to the second device, after authentication with the device-specific information succeeds.