Method of interacting commands of transformer substation based on third-party verification

Abstract

The invention discloses a method of interacting commands of a transformer substation based on third-party verification. A third-party certification device CA (Certificate Authority) is introduced to verify permission and identity of both parties of the commands, the CA is utilized as a trusted source, and credibility of the CA is guaranteed by adopting an intelligent card or a digital certificate technology, so that control permission and range of a target IED (Intelligent Electronic Device) can be effectively controlled to prevent command information from being intercepted and tampered; the third-party certification device CA is utilized to repackage the command information, so that security of transmission information is guaranteed; a hashed value is used for verifying integrity of mutual information, so that wrong data are effectively filtered, execution of the bad command is prevented, and information security of a control process of the transformer substation can be greatly improved. The method has the beneficial effects that: security of transmission of a control signal in the transformer substation is improved, so that the signal is prevented from being intercepted or tampered, security of data is guaranteed, operation crowd is limited, illegal users are isolated, information security is protected, the wrong data are effectively filtered, and execution of the bad command is prevented.

Description

technical field [0001] The invention relates to a substation command interaction method based on third-party verification. Background technique [0002] Applying asymmetric encryption technology can make the communication between the user / server application safe from eavesdropping by attackers, and always authenticate the server and optionally authenticate the user. [0003] At present, the control signal transmission process in the substation adopts plain text, and the communication protocol is public. The control signal is easy to be intercepted or tampered with. Illegal users are easy to obtain operation authority and execute wrong commands. The security of command interaction needs to be improved. Contents of the invention [0004] In view of the above problems, the present invention provides a substation command interaction method based on third-party verification, which improves the security of control signal transmission in the substation, prevents signals from bein...

AI Technical Summary

Problems solved by technology

[0003] At present, the control signal transmission process in the substation is in plain text, and the communication protocol is public. The control signal is easy to be intercepted or tampered with. Illegal users are easy to obtain operation authority and execute wrong commands. The security of command interaction needs to be improved.

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