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EFFICIENT AND VERIFIABLE MULTI-KEYWORD SORTING SEARCHABLE ENCRYPTION METHOD SUPPORTING PREFERENCE SEARCH AND LOGICAL SEARCH
EFFICIENT AND VERIFIABLE MULTI-KEYWORD SORTING SEARCHABLE ENCRYPTION METHOD SUPPORTING PREFERENCE SEARCH AND LOGICAL SEARCH
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机译:支持优先搜索和逻辑搜索的有效且可验证的多关键字排序可搜索加密方法
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摘要
Disclosed is an efficient and verifiable multi-keyword sorting searchable encryption method supporting preference search and logical search. A data owner encrypts a document and constructs a ciphertext index based on a document collection, and generates summary information of the document by using a key and a document content and then sends to a cloud server a ciphertext document and the encrypted index and summary information; a data user shares key information generated by the data owner, and generates a query trapdoor according to the query and sends to the cloud server the encrypted query trapdoor and the number K of documents to be acquired; after receiving the ciphertext index and the query trapdoor, the cloud server executes a secure inner product operation, searches for the K documents most relevant to the user query and sorts same according to the related scores with the query, then generates a verification object, and finally returns the most relevant K documents and the verification object to the data user;and the data user verifies the accuracy and completeness of the returned results by means of a verification algorithm.
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