Efficient database encryption method based on dictionary mapping

Abstract

The invention discloses an efficient database encryption method based on dictionary mapping. The method comprises at least a dictionary generation process, a dictionary encryption and storage process,a dictionary calling and decryption process, a ciphertext data generation and storage process, a ciphertext search process, a dictionary update process, and a double-dictionary running process. The efficient database encryption method based on dictionary mapping effectively prevents data information from disclosing after a database is invaded, and makes data break and breach much harder at the cost of small system performance.

Description

technical field [0001] The invention relates to the technical field of Internet of Things security, in particular to an efficient database encryption method based on dictionary mapping. Background technique [0002] Data is the core asset in an information system, and the loss, destruction or leakage of data is likely to bring immeasurable losses to the enterprise. Encrypting data is one of the core means in data security protection. [0003] There are two types of data, one is unstructured data, such as documents and pictures, and the other is structured data, such as data in a database. Both forms of data are very important and need to be protected by encryption. Structured data usually carries very concentrated and extremely valuable information, so it is particularly important to encrypt and protect it. [0004] Database encryption can significantly improve the security of the database. After encryption, the data is stored in ciphertext, which prevents the data from b...

AI Technical Summary

Problems solved by technology

Since most of the database management systems used in China are foreign products, for the sake of safety and controllability, at the current stage when domestic databases cannot completely replace foreign products, a purely domestic database encryption product is especially needed

[0005] The conventional data encryption and decryption methods currently on the market will seriously affect the efficiency of database usage, and only a small range of sensitive data in the database can be encrypted, while other unencrypted information is still the main component of the entire database information value, so the database After the system is invaded, the encryption of small-scale sensitive information cannot effectively prevent information leakage

Therefore, the market urgently needs a large-scale structured data ciphertext storage method that does not affect the usability of the database system to improve the severe reality of frequent data leakage.

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