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1. (WO2018076377) DATA TRANSMISSION METHOD, TERMINAL, NODE DEVICE AND SYSTEM

Pub. No.:    WO/2018/076377    International Application No.:    PCT/CN2016/104139
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Tue Nov 01 00:59:59 CET 2016
IPC: H04L 9/32
H04L 9/08
Applicants: HUAWEI TECHNOLOGIES CO., LTD.
华为技术有限公司
Inventors: XIONG, Xiaochun
熊晓春
HUANG, Zhengan
黄正安
FU, Jianjun
付建军
Title: DATA TRANSMISSION METHOD, TERMINAL, NODE DEVICE AND SYSTEM
Abstract:
Disclosed in the embodiments of the present invention are a data transmission method, terminal, node device, and system, wherein the method comprises: receiving, by a first terminal, broadcast security information sent by a second terminal, the broadcast security information comprising a broadcast message, a second digital signature, a first digital signature, a first public key, and a system identification, the first digital signature being obtained by means of a key management system performing calculation on the first public key on the basis of a second private key, and the second digital signature being obtained by means of the second terminal performing calculation on the broadcast message on the basis of a first private key; obtaining a second public key on the basis of the system identification, and verifying the first digital signature on the basis of the second public key, when the verification is successful, identifying the second terminal as a valid terminal; verifying the second digital signature on the basis of the first public key, when the verification is successful, processing the broadcast message. By means of the embodiments of the present invention, on the basis of ensuring the legitimacy of a broadcast message source, the overhead cost and the amount of data to be transmitted may be reduced.