Data integrity authentication information generation method and device as well as data integrity authentication method and device

Abstract

The invention provides a data integrity authentication information generation method and device. The device comprises a Hash structure generation unit, a common authentication information acquisition unit and an integrity authentication information generation unit, wherein the Hash structure generation unit can generate a Hash structure corresponding to a specific time period according to Hash values of data sections contained in multiple data sources in the specific time period, so that the Hash value in each data section can respectively represent a child node at the lowest level of the Hash structure in order to calculate a root Hash value of the child node; the common authentication information acquisition unit can acquire the common authentication information according to the root Hash values; the integrity authentication information generation unit can generate the integrity authentication information of the data sections contained in the multiple data sources in the specific time period for the multiple data sources, wherein the integrity authentication information of each data section comprises common authentication information, path information containing from the Hash value of the data section of the leaf node at the lowest level in the Hash structure to the root node, and the relevant node Hash value of the child node in the path. The invention also provides a data integrity authentication device and method.

Description

technical field [0001] The present invention generally relates to the technical field of data processing, and more specifically, to a method and device for generating data integrity verification information, and a method and device for verifying data integrity. Background technique [0002] Video surveillance is playing an increasingly important role in social security, crime prevention, case evidence collection, etc. Many enterprises, institutions, traffic roads, public places, and even individual residences have installed surveillance cameras. According to Article 42 of the "Criminal Procedure Law of the People's Republic of China", audio-visual materials can be used as the basis for a verdict after verification. However, because video data is easy to forge and tamper, whether video and audio recording (hereinafter referred to as video) can be used as effective evidence in court has been controversial in reality. In other words, a necessary condition for a video to be use...

AI Technical Summary

Problems solved by technology

However, this method prevents the video data from one camera from being stored and verified separately, and it is necessary to ensure that the video data of all cameras exist at the same time to verify its integrity.

This brings trouble to video saving, editing and verification

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