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|1. (WO2018137689) METHOD FOR SECURE DATA TRANSMISSION, ACCESS NETWORK, TERMINAL AND CORE NETWORK DEVICE|
|Applicants:||HUAWEI TECHNOLOGIES CO., LTD.
|Title:||METHOD FOR SECURE DATA TRANSMISSION, ACCESS NETWORK, TERMINAL AND CORE NETWORK DEVICE|
A method for secure data transmission, an access network, a terminal and a core network device. The method comprises: a first access network device receiving a request message sent by a terminal device; sending one or more pieces of network slice selection information to a first core network device; receiving a response message sent by the first core network device; sending user-plane security information to the terminal device; and the first access network device receiving encrypted data transmitted by the terminal device, and transmitting the encrypted data to the first core network device. The user-plane security information configured by the first core network device for the terminal device is sent to the terminal device via the first access network device, so that the terminal device performs encryption during data transmission according to the user-plane security information, thereby improving the security and reliability during the data transmission process under a network architecture of network slices. Since the first core network device configures the user-plane security information according to one or more pieces of network slice selection information, the flexibility and security of data encryption are improved.