Distributed cryptograph full-text retrieval system

Abstract

The invention provides a distributed cryptograph full-text retrieval system. The system comprises a database, a login module, an enquiry module, a result set display module, a document management module, an index module, an audit management module, a user management module and an authorization management module, wherein the enquiry module comprises an enquiry word splitting module, an enquiry encrypting module, an enquiry sub module, an access control module, a cryptograph retrieval word Hash module, a result set merging module and a result set ordering module; and the index module comprises an index word splitting module, an index encrypting module, a constructed distributed index module and a cryptograph index word Hash module. The system encrypts and processes document information and stores the document information in a distributed mode, encrypts index words and distributes the encrypted index words to different servers to construct a distributed cryptograph index library, and adds graded access control to the index library so as to improve the security and validity of full-text retrieval. The system can realize the full-text information retrieval of the cryptograph under a distributed environment, ensures the security retrieval of sensitive data, and has the characteristics of strong security, high execution efficiency and strong expandability.

Description

technical field [0001] The invention belongs to the technical field of computer retrieval, and in particular relates to a ciphertext full-text retrieval system in a distributed environment. Background technique [0002] With the development of communication, computer and information technology, in the relevant departments such as party and government agencies, enterprises and institutions, finance and finance, national defense and military industry, the amount of information retention and exchange has reached an unprecedented order of magnitude. Finding the information you need quickly has become an urgent need. At the same time, many commercial organizations and national secret-related agencies need to store and process a large number of secret-related documents in the network environment. Although full-text retrieval and encryption technologies are relatively mature and there are better commercial products, how to solve the problem in a distributed environment? Efficientl...

AI Technical Summary

Problems solved by technology

However, there is currently no ciphertext-based full-text retrieval product on the market. The development of a distributed ciphertext full-text retrieval system is an urgent need in the context of massive information sharing applications in a high-security environment.

Although full-text retrieval technology and encryption algorithms are very mature and there are good commercial products, how to realize ciphertext full-text retrieval in a distributed environment is still blank in the relevant research and product fields at home and abroad.

There are many difficulties in the combination of encryption technology and full-text indexing in a distributed environment. First, in order to ensure the security and reliability of index information, the information of index items must be encrypted. After encryption technology processing, ciphertext information cannot be used. Therefore, the text information processed by encryption technology cannot be directly combined with the existing full-text search mechanism to realize full-text search of ciphertext

Secondly, the existing full-text retrieval systems often build full-text indexes, so the amount of data indexed is often large, and encryption technology will further increase the amount of information

Therefore, storing the index in a distributed manner can solve this problem, but to build a practical system for ciphertext full-text retrieval in a distributed environment, the efficiency of introducing encryption technology into the full-text retrieval system must be considered and highly valued.

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