Data transmission system and method, and apparatus thereof
摘要
說明書
The data management network element performs digital signing on the first location privacy setting data, to prevent the gateway mobile location network element from delivering action indication information that does not match the first location privacy setting data, thereby effectively protecting the location information of the user terminal.
A second aspect of this embodiment of this application provides a data transmission method, including the following.
A user terminal calculates a first message authentication code of first location privacy setting data.
The user terminal sends the first message authentication code and the first location privacy setting data to a data management network element.
According to the second aspect, the user terminal sends the first message authentication code and the first location privacy setting data to the data management network element, so that the data management network element compares the first message authentication code with the obtained second message authentication code to determine whether the first location privacy setting data is tampered with, to effectively prevent location privacy setting data from being tampered with, thereby ensuring end-to-end integrity protection of the location privacy setting data between the user terminal and the data management network element.
With reference to the second aspect, in a possible implementation, the user terminal calculates the first message authentication code of the first location privacy setting data based on a first freshness parameter, where the first freshness parameter includes a first counter value and a first function counter value. Alternatively, the user terminal calculates the first message authentication code of first location privacy setting data based on a first random value.
