Dynamic credibility judgment method for executing clauses of select statements based on database

Abstract

The invention provides a dynamic credibility judgment method for executing clauses of select sentences based on a database. The method comprises the following steps of S1, performing static credibility measurement on most basic keywords in select SQL; S2, setting a sub-sentence keyword template in a credibility query statement in a credibility database by an administrator, calculating a credibility measurement value through an encryption algorithm, and storing the credibility measurement value in a credibility calculation base; S3, when the database runs in a trusted environment, enabling the user to use select statements containing group clauses to query, extract keywords in the query statements to merge into character strings, and then perform encryption operation on the character strings to obtain a trusted measurement value; and S4, comparing the credibility measurement value in S3 with the credibility measurement value in the credibility calculation base to obtain a credibility report. According to the dynamic credibility judgment method for executing the clause of the select statement based on the database, inspection is conducted under the condition that it is determined that the main keyword is credible, and dynamic credibility calculation of non-select statement operation of a user can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of databases, and in particular relates to a dynamic credible judgment method for clauses of a select statement based on database execution. Background technique [0002] With the rapid development of information technology, data security issues are becoming more and more complex, and trusted computing technology, as an important means of protecting data security, is also constantly developing. Today, trusted computing is used in many ways, such as identity theft protection, digital rights management, etc. In order to solve the insecurity of computer and network structures and fundamentally improve security, Credible has established a trustworthy control module (TPMC) based on the root of trust, starting a trusted hardware environment, and measuring the trustworthiness of the operating system. Extend the trust relationship to the operating system environment, measure the credibility of applications and netw...

AI Technical Summary

Problems solved by technology

At the same time, there are many keywords in the SQL statement, and various keywords can form multiple combinations. Each combination is used as a set for trusted measurement, which wastes a lot of storage space and trusted measurement time.

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