Patent ID: 11956626
Assignee: NOKIA TECHNOLOGIES OY
Field: Digital communication (Electrical engineering)
Classification: CPC G  H | IPC H

Claim 9:
10. A method, comprising:
generating a first key based on a first input specific to a mobile device, wherein the first input comprises measurement of mutable code of the mobile device and a unique device secret;
generating a cryptographic hash of the mutable code, wherein the mutable code includes a firmware image;
generating a symmetric second key on the basis of the first key and a second input specific to the mobile device, wherein the second input comprises a device identifier of the mobile device;
generating authentication credentials on the basis of the second key for authenticating the mobile device to a mobile communications network, wherein the authentication credentials are generated as part of an authentication and key agreement based authentication procedure;
generate a cipher key and an integrity key on the basis of the second key; and
use the device identifier as an input for authentication and key agreement based authentication procedure between the mobile device and the mobile communications network.