A symmetric searchable encryption method based on a block chain

Abstract

The invention discloses a symmetric searchable encryption method based on a block chain, and belongs to the technical field of computer cryptography. The method comprises a data storage scheme in which the ciphertext data is stored in a block chain and the ciphertext indexes are stored in a cloud server, an efficient symmetric searchable encryption algorithm is used for the generation of encrypteddata, ciphertext indexes and query tokens, and a query scheme of the ciphertext data based on the block chain. According to the invention, the user data is stored in the block chain; so that the tamper resistance of the user data is ensured; the index file is stored on the cloud server, the calculation is carried out by utilizing strong computing power with the server, the ciphertext data are searched, a user inquires that a transaction needs to be initiated and a deposit is submitted, integrity of the user and the cloud server is ensured by using a reward mechanism and a punishment mechanism, and the mutual cheating of the cloud server and the user is prevented.

Description

technical field [0001] The invention belongs to the technical field of computer cryptography, and in particular relates to a block chain-based symmetrical searchable encryption method. Background technique [0002] With the continuous development of science and technology, information technology has long been integrated into all aspects of people's lives, especially since entering the 21st century, the Internet and mobile Internet technologies have become increasingly mature, represented by the Internet of Things, artificial intelligence, big data and cloud computing. The vigorous development of the new generation of information technology has accelerated the transformation of the information industry and social progress, and laid the foundation for the construction of a complete "Internet +" service system. [0003] As one of the core applications of next-generation information technology, cloud computing technology is an extension of parallel computing and distributed comp...

AI Technical Summary

Problems solved by technology

To ensure user privacy, cloud storage systems employ client-side encryption. Although promising, the encrypted storage platform currently does not support a secure keyword search function, and users can only retrieve files from the service using a file identifier

In order to save storage space, some cloud storage systems compress and store user data, which destroys the integrity of user data.

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