Communication message security interaction method and device for distribution automation system
A technology of power distribution automation and communication messages, which is applied in the direction of safety communication devices, circuit devices, transmission systems, etc., and can solve the problems of inability to identify the main station of power distribution, inability to guarantee the confidentiality and integrity of communication messages, remote control/parameter setting, etc. Packet replay attacks and other issues
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[0062] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0063] The present invention provides a method for safely interacting communication messages of a power distribution automation system, such as figure 1 shown, including:
[0064] After the power distribution master station completes the two-way identity authentication with the power distribution terminal, it obtains the power distribution terminal information from the power distribution terminal. The power distribution terminal information includes the version number of the symmetric key of the power distribution terminal and the initial Vector IV 0 ;
[0065] The power distribution master station judges whether the power distribution terminal is the first identity authentication according to the version number of the symmetric key of the power distribution terminal. If it is not the first authentication, it executes the mess...
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