MTC key management for key derivation at both UE and network
US11122405B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2019 |
| Grant date | Sep 14, 2021 |
| Priority date | — |
| Expiry date | Jun 18, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/081
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
There is provided a new IWF SMC procedure for establishing security association between an MTC UE (10) and an MTC-IWF (20). The MTC-IWF (20) sends to the UE (10) at least an algorithm identifier which instructs the UE (10) to select one of algorithms for deriving a root key (K_iwf). The UE (10) derives the root key (K_iwf) in accordance with the selected algorithm, and derives at least a subkey for checking the integrity of messages transferred between the UE (10) and the MTC-IWF (20) by using the derived root key (K_iwf). The UE (10) protects uplink messages transmitted to the MTC-IWF (20) with the derived subkey. The MTC-IWF (20) protects downlink messages transmitted to the UE (10) with the same subkey derived at a core network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.