Research Article
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 |
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