Method and equipment for generating blind index table, and united keyword search method and equipment

Abstract

The invention discloses equipment for generating a blind index table, comprising an initialization unit, a keyword preprocessing unit and a blind unit, wherein the initialization unit is used for executing an initialization process to obtain a secrete key and a public key; the keyword preprocessing unit is used for generating a secrete keyword by using the secrete key based on a keyword index item; and the blind unit is used for selecting seeds at random for each line of the index table, generating match indicators by adopting the public key and seeds, generating an encryption key by the public key, the secrete key and the seeds, adopting the encryption key to encrypt a file identifier item in the line to obtain an encrypted file identifier, adopting the secrete key and the seeds to blindthe secrete keyword in the line to obtain a blind index set, and forming one line of the blind index table by arranging the encrypted file identifier, the match indicator and the blind index set. Theinvention also discloses a united keyword search method and equipment.

Description

technical field [0001] The present invention relates to the field of computer communication network security, more specifically, to a method and device for generating a blinded index table, and a method and device for joint keyword search under secret key setting. Background technique [0002] Data storage outsourcing is a trend on the current Internet, that is, to store data with a global archive service instead of using its own local storage. Today, Internet-based online archiving services provide a large amount of storage space for their end users, including individual users and businesses. There are archive services that provide storage of various user data. For example, Amazon Simple Storage Service (Amazon S3) (reference [1]) provides a web service interface that can be used to store and retrieve unlimited classified data, billed by GB / month and data transfer volume. There are also other archival services that provide storage of certain data types, especially sensiti...

AI Technical Summary

Problems solved by technology

[0009] 1) The server does not know what the searcher is looking for, for example, if the searcher is searching for documents containing the keyword "network", the server should not know

[0010] 2) The search party cannot forge the search authority based on experience. For example, if the search party has been issued an SC to search for documents containing the keyword "network", he should not be able to create an SC for the keyword "network" or "network".

[0064] Last but not least, none of the prior art addresses "non-keyword" searches, such as searching for documents that contain the keyword "Alice" but do not contain "web"

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