Communication method, device and system, readable storage medium and computer device
A communication method and technology of a communication device, which can be applied to transmission systems, electrical components, etc., can solve problems such as low security
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Embodiment 1
[0051] figure 1 The structure of the communication system provided by Embodiment 1 of the present invention is shown, and for convenience of description, only the parts related to the embodiment of the present invention are shown.
[0052] In the embodiment of the present invention, the communication system includes: a master control terminal and a controlled terminal communicatively connected with the master control terminal, the controlled terminal generates a first serial number after receiving the authentication request sent by the master control terminal, and sends a response command to the master, the master generates a second serial number according to the first serial number, and sends command data to the controlled terminal, and the controlled terminal generates the second serial number and the first serial number according to the command data Numbers are compared, and when the second serial number differs from the first serial number by a first preset value, the comm...
Embodiment 2
[0058] figure 2 It shows the implementation flow of the communication method provided by Embodiment 2 of the present invention, image 3 It is an interaction sequence diagram of the communication method provided by the embodiment of the present invention, which is described in detail as follows:
[0059] In step S110, an authentication request sent by the master is received.
[0060] In the embodiment of the present invention, the authentication request includes authentication information, and the authentication information may include information such as the identification of the master control terminal, a communication protocol format of the authentication information, and a key.
[0061] In step S120, after the authentication is passed, a response command is sent to the master, and the response command carries a first serial number.
[0062] In the embodiment of the present invention, the step of passing the authentication specifically includes:
[0063] Judging whether...
Embodiment 3
[0079] Figure 4 It shows the implementation process of the communication method provided by the third embodiment of the present invention, which is similar to the second embodiment, except that, before the step of receiving the authentication request sent by the master control terminal, the method further includes:
[0080] In step S210, when the historical communication protocol fails, send failure information to the control terminal, where the failure information includes re-authentication information.
[0081] In the embodiment of the present invention, the historical communication protocol is a general communication protocol adopted when the master control terminal communicates with the controlled terminal. The general communication protocol can be a network communication protocol (TCP, UDP, HTTP, etc.), wireless or wired communication protocol.
[0082] In this embodiment of the present invention, the failure of the historical communication protocol includes that the ne...
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