公开(公告)号：US20240022775A1

公开(公告)日：2024-01-18

申请号：US18475126

申请日：2023-09-26

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhijian LIANG ,  Zhigui WEI ,  Mengfu WANG

IPC: H04N21/258 ,  H04N21/266 ,  H04N21/2347 ,  H04N21/233 ,  H04L9/08

CPC classification number: H04N21/25816 ,  H04N21/26613 ,  H04N21/2347 ,  H04N21/233 ,  H04L9/0861

Abstract: A data transmission method and apparatus are provided, to improve security of audio-video data transmission. In this application, the source device performs identity authentication on and negotiate a key with a transmission device that needs to output audio-video data or perform transformation processing on a transmission path to the sink device, and generates a key distribution packet used to encrypt or decrypt an audio-video stream only for the transmission device that needs to output audio-video data or perform transformation processing. Another device on the transmission path cannot know the key and cannot perform decryption, so that transmission security of the audio-video stream can be improved. In addition, the source device centrally performs identity authentication and authorization control on other transmission devices that need to output the audio-video data or perform transformation processing.