Patent ID: 9306748
Filing Date: 2016-04-05
CPC Classification: H04L,H04W

Claim Text:
1. In a communication system comprising a first node registered to a first authentication server and a second node registered to a second authentication server, a method for authenticating the first node by the first authentication server, the method comprising: receiving an authentication request message requesting authentication of the first node from the second authentication server; authenticating the first node using an identifier (ID) of the first node comprised in the authentication request message by conducting an authentication procedure between the first node and the first authentication server; generating a hash value of an ID of the second node based on the ID of the second node and a secret value between the first authentication server and the first node if the authentication of the first node is successful; generating a security key for use in encrypted communication between the first node and the second node; and transmitting an authentication success message indicating successful authentication of the first node to the second authentication server, wherein the authentication request message comprises the ID of the first node, the ID of the second node, and a first authentication code, and wherein the authentication success message comprises the hash value of the ID of the second node used by the first node for determining to perform of communication with the second node, the security key, and a second authentication code.