Cipher searching method based on cloud document system
A cloud storage system, ciphertext technology, applied in special data processing applications, instruments, electronic digital data processing, etc., can solve the problem of low efficiency of index structure, achieve high correlation, ensure privacy security, and ensure the effect of privacy security
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[0048] Below in conjunction with accompanying drawing and specific examples, the present invention will be described in further detail:
[0049] refer to figure 1 , in the existing ciphertext retrieval system in cloud storage, the user interacts directly with the cloud server, and the data uploader uploads the encrypted file and keyword trapdoor to the cloud server. When the retrieval user needs to perform retrieval, a required The trapdoor of the search keywords is sent to the cloud server, and the cloud server returns the matched files to the search user according to the search results.
[0050] Since there is no separate index server in this system, the user's file identification is stored on the cloud server in a linear structure or a binary tree structure. In large-scale data storage, the number of elements stored in tree nodes is limited. When the number of files is very large, the depth of the binary tree structure will become very large. When the server retrieves fil...
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