HMAC algorithm-based electric energy meter encryption communication method

Abstract

The invention discloses an HMAC algorithm-based electric energy meter encryption communication method and system. The method comprises the following steps of establishing a communication link between an upper computer and an electric energy meter; enabling the electric energy meter to generate a random number and upload the random number to the upper computer; enabling the upper computer to adopt an HMAC algorithm to calculate and generate a signature according to the obtained random number; using the verification signature of the electric energy meter for establishing data interaction with the upper computer, and generating the encrypted signature value by adopting the HMAC algorithm, so that the communication reliability of the electric energy meter can be improved, the electric energy meter is not easy to crack, the method can be realized only by setting a program without setting an encryption chip at the terminal of the electric energy meter, and the manufacturing and maintenance cost of the electric energy meter can be reduced.

Description

technical field [0001] The invention relates to the field of electric energy meters, in particular to an encrypted communication method for electric energy meters based on an HMAC algorithm. Background technique [0002] The existing smart energy meters are generally equipped with near-infrared, RS485 and other communication ports for data interaction with communication software such as host computers. The host computer refers to the communication software developed by the energy meter manufacturer and used with the energy meter. Provides an interface capable of managing and reading energy meter data. At present, although the existing electric energy meters have password protection functions, the upper computer must enter the correct password during communication, otherwise the communication cannot be carried out, which ensures the reliability and security of the electric energy meter data to a certain extent, thereby avoiding Stealing and tampering of energy meter data; ho...

AI Technical Summary

Problems solved by technology

At present, although the existing electric energy meters have password protection functions, the upper computer must enter the correct password during communication, otherwise the communication cannot be carried out, which ensures the reliability and security of the electric energy meter data to a certain extent, thereby avoiding Stealing and tampering of energy meter data; however, the existing password protection mechanism is generally set to a fixed password, which has a high risk of being cracked after multiple retries, and the security is low

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