Patent ID: 8948386
Filing Date: 2015-02-03
Classification: H04L,H04W

Abstract:
1. A method in a mobile device, comprising: initiating communication with a visited network, the visited network including a verification entity, and the visited network able to communicate with a home network of the mobile device; receiving, from the visited network, an ephemeral public key of the home network; using the ephemeral public key of the home network and a static private key of the mobile device to participate in at least a portion of an asymmetric key agreement protocol with the home network to compute a secret value, wherein an ephemeral private key of the mobile device is not used in the asymmetric key agreement protocol and the asymmetric key agreement protocol is a Menezes-Qu-Vanstone (MQV) key agreement protocol; obtaining a response value derived from the secret value; and sending the response value to the verification entity of the visited network for use in authenticating the mobile device.