Data encryption and decryption method and device, equipment and storage medium

Abstract

The invention relates to the technical field of data processing, and discloses a data encryption and decryption method, apparatus and device, and a storage medium. The method comprises the steps of firstly determining a system public key and a main key according to related information in a data plaintext; according to the user identity identification information in the data plaintext, modifying the master key through a preset key modification algorithm to obtain a user private key and a conversion key; performing offline encryption on the data plaintext according to the system public key to generate an offline ciphertext; converting the offline ciphertext based on the user identity identification information and the conversion key to generate a conversion ciphertext; and when a data reading instruction is received, reading the conversion ciphertext from the storage unit, and decrypting the conversion ciphertext by using the user private key to obtain a data plaintext. According to thetechnical scheme provided by the invention, the expenditure for the mobile terminal to operate encryption and decryption is reduced, so that the technical scheme is suitable for lightweight mobile equipment. In addition, the invention also relates to a blockchain technology, and data and related keys can be stored in the blockchain.

Description

technical field [0001] The present invention relates to the technical field of data processing, in particular to a data encryption and decryption method, device, equipment and storage medium. Background technique [0002] With the rapid development of mobile communication and cloud computing technology, mobile cloud computing can provide people with a free, convenient, and on-demand cloud service model of storage and computing through mobile networks. In addition to the convenient cloud data storage of traditional cloud computing, a large number of open software services, ubiquitous and powerful cloud computing support, and low terminal configuration requirements, mobile cloud services integrate mobile communication devices and the Internet to push cloud services from the cloud to mobile terminal. [0003] However, massive amounts of data stored in the cloud often contain personal privacy information, such as electronic medical records, private emails, personal confidential...

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide a data encryption and decryption method, device, equipment and storage medium, which are used to solve the technical problems in the prior art that the encryption and decryption methods in the data transmission process are too complicated and incompatible with the implementation of lightweight equipment

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