Title:
KEY MANAGEMENT METHOD FOR FIELDBUS CHANNEL ENCRYPTION DEVICE
Document Type and Number:
WIPO Patent Application WO/2021/008181
Kind Code:
A1
Abstract:
The present invention provides a key management method for a fieldbus channel encryption device. Key distribution, key updating, and key removal are performed on a channel encryption device connected to a fieldbus so as to achieve decentralized distributed key management. In the fieldbus, identity authentication of a channel access device is performed without the need to establish any separate public key infrastructure or certificate authority, thereby improving access efficiency, reducing time overhead, and improving compatibility. An existing bus network topological structure does not need to be retrofitted, and effectively preventing a case in which an unauthorized illegal device monitors, intercepts, and tampers with data monitoring and control information on the fieldbus channel, thereby achieving high resistance to a man-in-the-middle attack. The invention reduces a safety risk caused by intrusions into fieldbus channels in automation control systems in industries such as water conservancy, intelligent manufacturing, environmental monitoring, and the like, and provides a reliable security assurance to critical national infrastructures.
Inventors:
FU XIAO (CN)
WANG ZHIJIAN (CN)
WANG ZHIJIAN (CN)
Application Number:
PCT/CN2020/085964
Publication Date:
January 21, 2021
Filing Date:
April 21, 2020
Export Citation:
Assignee:
UNIV HOHAI (CN)
International Classes:
H04L29/06
Foreign References:
| CN106790053A | 2017-05-31 | |||
| CN102231690A | 2011-11-02 | |||
| CN110401528A | 2019-11-01 |
Attorney, Agent or Firm:
NANJING JINGWEI PATENT & TRADEMARK AGENCY CO., LTD (CN)
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