Patent ID: 8571211
Filing Date: 2013-10-29
Classification: H04L,H04W

Abstract:
1. A method for generating a security key in a mobile communication system including an Authentication, Authorization and Accounting (AAA) server, the method comprising: generating, by the AAA server, a Master Session Key (MSK) and an Extended MSK (EMSK) using a Long Term Credential key; and transmitting the MSK and the EMSK to each of a plurality of nodes included in the mobile communication system, wherein one of the MSK and the EMSK are used for generating a Device-MSK (D-MSK) for device authentication and a User-MSK (U-MSK) for user authentication in a first node of the plurality of nodes, wherein the EMSK is used for generating a key that is used in a Mobile IP in a second node of the plurality of nodes, and the key that is used in the Mobile IP is used for generating a key that is used in a Client Mobile IP (CMIP) and a Proxy Mobile IP (PMIP), and wherein the U-MSK is truncated by a predetermined length to generate a Root-MSK that is used for authenticating the U-MSK.