Telefonaktiebolaget LM Ericsson (publ)
METHODS, COMPUTER PROGRAMS, COMPUTER PROGRAM PRODUCT, COMMUNICATION DEVICES, NETWORK DEVICE AND SERVER

Abstract:

A communication device for communication with a network device during EAP-AKA'. The communication device is operative to: receive a first Perfect Forward Secrecy, PFS, parameter value and at least one attribute value indicating a choice of a Diffie-Hellman group from the network device; receive a cipher key, CK, and an integrity key, IK, generate a modified cipher key, CK', and a modified integrity key, IK' based on CK, IK and an access network identity, calculate a second PFS parameter value; send the second PFS parameter value to the network device; calculate a third PFS parameter value; and derive, using a Pseudo-random function, a key based on the third PFS parameter value, CK', IK' and an identity associated with the communication device. A network device, methods, further communication devices, a server, computer programs and a computer program product are also disclosed.