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US 11,777,716 B2Granted
Key exchange method and apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsDongmei Zhang, Jing Chen
Life of this patent
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Abstract
Embodiments of the present invention disclose a key exchange method and apparatus. A network device acquires a first key, and sends a message including the first key to a second user equipment, so that the second user equipment uses, when communicating with a first user equipment by using a D2D link, the first key to protect transmitted information.
Claims20
An apparatus, comprising:
- a non-transitory memory storage comprising instructions;
- and
- one or more processors in communication with the non-transitory memory storage, wherein the one or more processors are configured to execute the instructions to:
- receive a second key from a network device, wherein the second key is shared by the network device and a second user equipment, and the apparatus is the second user equipment, or the apparatus is applied to the second user equipment;
- and
- generate, according to the second key and a first parameter, a first key using a key derivation function, wherein information communicated between the second user equipment and a first user equipment using a device-to-device (D2D) link between the second user equipment and the first user equipment is protected based on the first key.
3 more elements
An apparatus, comprising:
- a non-transitory memory storage comprising instructions;
- and
- one or more processors in communication with the non-transitory memory storage, wherein the one or more processors are configured to execute the instructions to:
- send a second key to a first user equipment, wherein the second key is shared by a network device and the first user equipment, and the apparatus is the network device or the apparatus is applied to the network device;
- and
- wherein information communicated between the first user equipment and a second user equipment using a device-to-device (D2D) link between the second user equipment and the first user equipment is protected based on a first key, and the first key is derived by the first user equipment based on the second key and a first parameter.
3 more elements
A method, comprising:
- sending, by a network device, a second key to a first user equipment, wherein the second key is shared by the network device and the first user equipment;
- and
- wherein information communicated between the first user equipment and a second user equipment using a device-to-device (D2D) link between the second user equipment and the first user equipment is protected based on a first key, and the first key is derived by the first user equipment based on the second key and a first parameter.
A non-transitory computer readable medium, wherein the non-transitory computer readable medium stores instructions that are executable by a computer, and the instructions comprise instructions for:
- sending a second key to a first user equipment, wherein the second key is shared by a network device and the first user equipment;
- and
- wherein information communicated between the first user equipment and a second user equipment using a device-to-device (D2D) link between the second user equipment and the first user equipment is protected based on a first key, and the first key is derived by the first user equipment based on the second key and a first parameter.
A method, comprising:
- receiving, by a first user equipment, a second key from a network device, wherein the second key is shared by the network device and the first user equipment;
- and
- generating, according to the second key and a first parameter, a first key by using a key derivation function, wherein information communicated between the first user equipment and a second user equipment using a device-to-device (D2D) link between the second user equipment and the first user equipment is protected based on the first key.
Dependencies are inferred from the claim text.