A full-text retrieval method based on encryption and decryption algorithm

Abstract

The invention discloses a full-text retrieval method based on an encryption and decryption algorithm, which is used for realizing the encryption processing of the full-text retrieval index file and improving the security of the full-text retrieval. The invention provides a full-text retrieval method based on an encryption and decryption algorithm. The method comprises the following steps: the index result of a plaintext document data source is encrypted by using a preset index encryption algorithm and stored in a ciphertext index database; a preset document encryption algorithm is used to encrypt all the plaintext documents in the plaintext document data source and store the plaintext documents in a ciphertext document library; the index encryption algorithm is used for encrypting the retrieval request of a user to obtain ciphertext keywords; and the index encryption algorithm is used for encrypting the retrieval request of the user to obtain ciphertext keywords, the ciphertext index library is searched according to the ciphertext keyword, the ciphertext document library is searched according to the searching result, and the ciphertext document corresponding to the searching request is output; a preset document decryption algorithm is used to decrypt the ciphertext document to obtain a plaintext document retrieved for the user.

Description

technical field [0001] The invention relates to the technical field of encrypted storage, in particular to a full-text retrieval method based on encryption and decryption algorithms. Background technique [0002] The rapid development of computers has brought great convenience to users. Users can retrieve the information they need through the database. For example, the degree of informatization of the party and government is getting higher and higher, and the amount of data generated is increasing day by day. Office workers need to use full-text search technology to retrieve a large amount of historical data. Through full-text retrieval technology, all source documents are stored in the library. Information data that requires a high degree of confidentiality cannot be stored in the database in the form of plain text, otherwise leaks will occur. [0003] The existing technology also provides a technical solution for encrypting and storing information data, but the tradition...

AI Technical Summary

Problems solved by technology

[0003] The existing technology also provides a technical solution for encrypting and storing information data, but the traditional full-text search index files are easily copied illegally, and the problem of leaking incidents occurs through secondary use. How to implement the encryption of the entire business chain of full-text search to avoid leakage incidents is still an unresolved problem in this field

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