公开(公告)号：US20220417039A1

公开(公告)日：2022-12-29

申请号：US17903957

申请日：2022-09-06

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Wei PAN ,  Liang XIA ,  Michael Charles RICHARDSON

IPC: H04L9/32 ,  G06F16/955

Abstract: Embodiments of this application disclose a manufacturer usage description (MUD) file obtaining method and a device. A MUD controller uses a verified valid MUD uniform resource locator (URL) as a trusted basis. When a terminal device is currently updated, the MUD controller obtains a new MUD file based on a new MUD URL that meets a matching condition with the trusted MUD URL. Alternatively, the MUD controller uses fixed attribute information of a valid MUD URL as a trusted basis. When a terminal device is currently updated, the MUD controller obtains an updated MUD URL based on the trusted fixed attribute information and newly received variable attribute information, and obtains a new MUD file.