Patent ID: 11882119
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC G  H

Claim 12:
13. A communication apparatus included in a communication system,
wherein the 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 communication apparatus includes a communication unit configured to notify a 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,
the communication unit is configured to send a request for a cryptographic key for performing cryptographic communication between the communication apparatus and other communication apparatuses included in the communication system to the management communication apparatus, and
the management communication apparatus performs, in response to the request for the cryptographic key obtained, a first cryptographic key distribution process for distributing the cryptographic key to the communication apparatus and a second cryptographic key distribution process for distributing the cryptographic key to the other communication apparatuses.