Patent ID: 8611536
Filing Date: 2013-12-17
Classification: H04L,H04W

Abstract:
1. A mobile station for communicating in a wireless communications network, comprising: a receiver configured to receive at least one authentication data parameter forming a first challenge value from the wireless communications network; a memory configured to store a reserved challenge value, wherein the reserved challenge value is not transferred over a wireless communication link between the mobile station and the wireless communications network and is not used for initial authentication procedures; a first processing circuit configured to store a secret key, to generate a first key based on the at least one received authentication data parameter and the secret key, and to generate a second key based on the reserved challenge value and the secret key and independent of data received over the wireless communication link; and a second processing circuit configured to generate a third key, to use in the communication between the mobile station and the wireless communications network, using at least the first and second keys.