Hierarchical Group Based Mutual Authentication and Key Agreement for Machine Type Communication in LTE and Future 5G Networks

Table 4

Parameters for computing communication costs.

Field	Size (bits)
	128
	128
SQN	48
AMF	16
MAC	64
RES/XRES	128
CK	128
IK	128
AK	48
IMSI	64
LAI	40
GK	128
GID	64
	256
	24
ECDSA public key	160
Timestamp	32
Digital signature	320
Temporary ID	128
Pseudo-ID	320
Security value	128
LMK	256