Apparatuses and methods for wireless communication

A device comprising:

• a wireless communication interface configured to send and receive data to and from a wireless communication network;
• and
• a processing circuit communicatively coupled to the wireless communication interface, the processing circuit configured to:
• wirelessly transmit a non-access stratum (NAS) message to a radio access node wherein the NAS message is passed to a mobility management entity (MME) and then to a core network device serving the MME wherein the core network device is a key anchor;
• obtain an authentication session key that is based in part on a secret key known by a home subscriber server (HSS) configured to serve the core network device, the authentication session key known to the core network device, wherein the secret key is derived from a root key known by the device and an authentication center;
• obtain a mobility session key that is based in part on the authentication session key, the mobility session key known to a mobility management entity (MME) served by the core network device and serving the device;
• and
• cryptographically secure data sent from the device to the wireless communication network based on the mobility session key.

A device comprising:

• means for wirelessly transmitting a non-access stratum (NAS) message to a radio access node wherein the NAS message is passed to a mobility management entity (MME) and then to a core network device serving the MME wherein the core network device is a key anchor;
• means for obtaining an authentication session key that is based in part on a secret key known by a home subscriber server (HSS) configured to serve the core network device, the authentication session key known to the core network device, wherein the secret key is derived from a root key known by the device and an authentication center;
• means for obtaining a mobility session key that is based in part on the authentication key, the mobility session key known to a mobility management entity (MME) served by the core network device and serving the device;
• and
• means for cryptographically securing data sent from the device to a wireless communication network based on the mobility session key.

A non-transitory computer-readable storage medium having instructions stored thereon that are operational at a device, the instructions when executed by at least one processor causes the processor to:

• wirelessly transmit a non-access stratum (NAS) message to a radio access node wherein the NAS message is passed to a mobility management entity (MME) and then to a core network device serving the MME, wherein the core network device is a key anchor;
• obtain an authentication session key that is based in part on a secret key known by a home subscriber server (HSS) configured to serve the core network device, the authentication session key known to the core network device, wherein the secret key is derived from a root key known by the device and an authentication center;
• obtain a mobility session key that is based in part on the authentication session key, the mobility session key known to a mobility management entity (MME) served by the core network device and serving the device;
• and
• cryptographically securing data sent from the device to a wireless communication network based on the mobility session key.