US 11,882,119 B2
Communication system, cryptographic key distribution method, management communication apparatus, and communication apparatus
Yoichi Masuda, Osaka (JP); Kenji Kuramae, Kanagawa (JP); and Masao Akimoto, Chiba (JP)
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
Appl. No. 17/264,237
Filed by PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD., Osaka (JP)
PCT Filed Jul. 1, 2019, PCT No. PCT/JP2019/026020
§ 371(c)(1), (2) Date Jan. 28, 2021,
PCT Pub. No. WO2020/026669, PCT Pub. Date Feb. 6, 2020.
Claims priority of application No. 2018-143236 (JP), filed on Jul. 31, 2018.
Prior Publication US 2021/0320921 A1, Oct. 14, 2021
Int. Cl. G06F 7/04 (2006.01); H04L 9/40 (2022.01)
CPC H04L 63/0876 (2013.01) [H04L 63/062 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A communication system, comprising:
a management communication apparatus;
a first communication apparatus; and
a second communication apparatus,
wherein the first communication apparatus is capable of communicating using a plurality of Internet Protocol (IP) addresses in different versions from each other,
the first communication apparatus sends a discovery request, and the management communication apparatus receives the discovery request;
wherein the first communication apparatus receives a discovery response from the management communication apparatus,
the first communication apparatus and the management communication apparatus start a first authentication process;
wherein the first authentication process includes a mutual authentication process between the first communication apparatus and the management apparatus;
the first communication apparatus includes a first communication unit configured to notify the management communication apparatus of a first IP address among the plurality of IP addresses in the first authentication process for entering the communication system, and to notify the management communication apparatus of a second IP address among the plurality of IP addresses after the first authentication process, and
the management communication apparatus includes: a communication unit configured to obtain a request for a cryptographic key for performing cryptographic communication between the first communication apparatus and the second communication apparatus; and an information processing unit configured to perform, in response to the request for the cryptographic key obtained, a first cryptographic key distribution process for distributing the cryptographic key to the first communication apparatus and a second cryptographic key distribution process for distributing the cryptographic key to the second communication apparatus;
the management communication apparatus includes:
a communication unit configured to obtain a request for a cryptographic key for performing cryptographic communication between the first communication apparatus and the second communication apparatus; and
an information processing unit configured to perform, in response to the request for the cryptographic key obtained, a first cryptographic key distribution process for distributing the cryptographic key to the first communication apparatus and a second cryptographic key distribution process for distributing the cryptographic key to the second communication apparatus.