Key obtaining method and device, and communications system
US11582602B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2020 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Dec 25, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W8/065
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for security handling in a mobility of a terminal device, where the method includes: a target access and mobility management function (AMF) entity receiving a first message for registering a terminal device; the target AMF entity sending a second message to a source AMF entity after receiving the first message; the source AMF entity deriving a first key based on a key between the source AMF entity and the terminal device; the source AMF entity sending the first key to the target AMF entity; the target AMF entity determining to use the first key based on security related information after receiving the first key; and the target AMF entity determining a communication key between the target AMF entity and the terminal device based on the first key after determining to use the first key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.