AUTHENTICATION METHOD, AUTHENTICATION SYSTEM, AND CONTROLLER

摘要

A first controller generates a first group key, executes first mutual authentication with devices within a group, and shares a first group key with devices that have succeeded in authentication. At least one controller within the group decides a coordinator that manages a group key used in common in the group, from controllers including one or more controllers and a second controller newly joined in the group, in accordance with attributes of the controllers. The first controller executes second mutual authentication with the coordinator, and shares the first group key with the coordinator in a case where the authentication is successful. The coordinator performs encrypted communication within the group using the first group key. The coordinator generates a second group key when valid time of the first group key is equal to or smaller than a predetermined value, executes third mutual authentication with the devices and controllers within the group, and updates the group key of the devices and controllers that have succeeded in authentication to the second group key.

主权项

1. An authentication method for a group to which one or more devices and one or more controllers including a first controller on a network belong,
wherein the first controller generates a first group key, executes first mutual authentication with devices within the group, and shares the first group key with devices that have succeeded in authentication, wherein, in a case where a second controller newly joins the group, at least one controller within the group decides a coordinator that manages a group key used in common in the group, from controllers including the one or more controllers and the second controller newly joined in the group, in accordance with attributes of the controllers, wherein the first controller executes second mutual authentication with the coordinator, and shares the first group key with the coordinator in a case where the authentication is successful, wherein the coordinator performs encrypted communication within the group using the first group key, and wherein the coordinator generates a second group key when valid time of the first group key is equal to or smaller than a predetermined value, executes third mutual authentication with the devices and controllers within the group, and updates the group key of the devices and controllers that have succeeded in authentication to the second group key.