STATE SECRET ALGORITHM-BASED GAS METER READING SYSTEM AND GAS DATA TRANSMISSION METHOD THEREFOR

摘要

Disclosed are a state secret algorithm-based gas meter reading system and a gas data transmission method therefor. Said system comprises an information acquisition device, a central information processor, a state secret algorithm module, a receiving terminal, etc. Said method comprises: acquiring gas data and generating meter reading data; a state secret algorithm module encrypting the meter reading data to generate a first ciphertext, encrypting a first digest of the first ciphertext to generate a first digest ciphertext, and then sending the first ciphertext and the first digest ciphertext to a receiving terminal; and the receiving terminal decrypting the first digest ciphertext to obtain the first digest, recalculating the digest of the first ciphertext to obtain a second digest, and after the second digest and the first digest are successfully matched, decrypting the first ciphertext to obtain the meter reading data. The present invention relates to a dual encryption manner of encrypting and transmitting the meter reading data and encrypting and transmitting the first digest of the first ciphertext, and the meter reading data is obtained only after the dual encryption verification is passed, greatly improving data transmission security and preventing theft.