Metering data transmission system based on identity encryption and data transmission method

Abstract

The invention discloses a metering data transmission system based on identity encryption, which comprises a host station, a metering terminal and an intelligent electric energy meter, wherein the intelligent electric energy meter encrypts metering data by adopting a working key and sends the metering data to the metering terminal; the metering terminal performs decryption by adopting the working key of the intelligent electric energy meter, then encrypts the metering data to form a ciphertext by using a public key of the metering terminal, generates a signature for the ciphertext, and sends the metering data and ciphertext information to the host station together; the host station verifies the signature by using the public key of the metering terminal, a private key of the metering terminal is generated after the signature is authenticated, and decryption for ciphertext information is performed so as to obtain an information plaintext; the host station generates a control command according to data processing results and encrypts the control command by adopting system sharing parameters and the public key of the metering terminal so as to generate the ciphertext, the ciphertext is sent to the metering terminal after the signature is generated, the metering terminal verifies the signature and the signature is authenticated, and the control command aiming at the intelligent electric energy meter is generated after the private key is adopted to decode the ciphertext and the control command is read; and in addition, the control command aiming at the intelligent electric energy meter is encrypted through the working key of the intelligent electric energy meter and then is sent to the intelligent electric energy meter. The metering data transmission system improves the security for data transmission, and reduces the calculating load of the host station.

Description

technical field [0001] The invention relates to the technical field of power data transmission, in particular to an identity-based encryption metering data transmission system, and also to a data transmission method for the system. Background technique [0002] Existing remote metering data transmission systems generally include smart electric energy meters, metering terminals, and master stations. Among them, metering terminals are mainly metered by plant power collection terminals, load management terminals, low-voltage meter reading concentrators, and distribution transformer monitoring metering terminals. Equipment composition. [0003] In the actual low-voltage centralized meter reading system for residential users, the low-voltage meter reading concentrator reads the user data collected and sent by multiple smart energy meters in plain text, and then sends the user data to the master station for background processing. In the process, the security of data transmission ...

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Problems solved by technology

[0004] However, the above-mentioned encrypted data transmission system also has the following defects: (1) the key of the smart energy meter is generated by the key of the master station and some explicit parameters of the smart energy meter, so the security of the entire data transmission system is only Depending on the security of the master station key, once the master station key is attacked, the data transmission security of the entire system will not be effectively guaranteed; (2) After the existing encrypted data transmission system is put into use, if you want to update it The key of a smart energy meter must be updated for all the keys of the smart energy meters in the system, so the workload is very large, which brings insurmountable difficulties to the actual operation; (3) the existing encrypted data transmission The metering terminal in the system only has the function of forwarding metering data, and all the data uploaded by the smart energy meter are processed by the master station, resulting in a heavy calculation load on the master station; (4) The metering terminal in the existing encrypted data transmission system is Ciphertext data cannot be authenticated and is vulnerable to denial of service attacks, which affects the normal transmission of metering data

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