A method for generating a data authentication code

Abstract

The invention discloses a generation method for a data authentication code. The method comprises the steps of setting a binary character string with a fixed random length as an initial vector value MAC0 of an MAC function; calling the MAC function, using a currently existing last output MAC value MACi-1 as an initial vector, using a character string corresponding to current data Mi of which the data authentication code is not generated as an input, outputting the corresponding MAC value MACi to serve as a non-public verification data authentication code of the current data Mi, and storing andsending the MAC value MACi to a register server; using the MAC value MACi corresponding to the last generated non-public verification data authentication code as the input according to a public verification period strategy, outputting a public verifiable data authentication code of the current data Mi, and storing and sending the code to the register server. According to the generation method provided by the invention, the generated data authentication code of the current data can authenticate all previous data, so that a data loss risk is reduced, reliability and security of data authentication are enhanced, and data authentication efficiency is improved.

Description

technical field [0001] The invention relates to data authentication technology, in particular to a method for generating a data authentication code. Background technique [0002] With the development of network technology and big data concepts, data authentication technology to ensure data integrity has become more critical, whether in any industry such as government, finance, electric power, medical, aerospace, shipping, etc., in the communication process, to ensure Data security and not being damaged are the top priority of realizing data storage and improving system reliability. Once data is destroyed, it will bring irreparable losses. [0003] At present, the data authentication technologies used are mainly message authentication codes, digital signature schemes, etc., which only authenticate the current incremental data one by one, but cannot guarantee the security of all previous data. This kind of authentication only verifies the current incremental data. scheme, the...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing data authentication codes generated by authenticating the current incremental data one by one only reflect the integrity of the current incremental data, and cannot authenticate the integrity of all previous data, resulting in loss and damage Risk. If you want to authenticate all the previous data, you need to reprocess all the data. The amount of data processing is very large, the efficiency of data authentication is low, and the delay is obvious, which affects the user experience, especially when the authentication code is required to be public. The authentication speed is extremely slow , the above defects are more obvious

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