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Dynamically retrievable cloud computing data encryption method

A data encryption and cloud computing technology, applied in electrical components, transmission systems, etc., can solve the problem that content cannot be retrieved, and achieve the effect of adding and deleting safely and ensuring confidentiality.

Inactive Publication Date: 2014-01-22
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In another case, the data can be encrypted and stored, but the content output by the existing encryption algorithm cannot be retrieved

Method used

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  • Dynamically retrievable cloud computing data encryption method

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Embodiment Construction

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0016] see figure 1 , the embodiment of the present invention includes:

[0017] A dynamically retrievable cloud computing data encryption method includes the following steps: the user stores the data on the cloud server, and the data is regarded as a series of n files f = (f1, . . . , fn ); assuming that the user Obtain an index program, take the file f as input, and then output a reverse index; give a search item according to the auxiliary search protocol, set the keyword as w, and use fw to represent the file col...

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Abstract

The invention discloses a dynamically retrievable cloud computing data encryption method. The method comprises the following steps: storing data on a cloud server by a user, wherein the data are considered as a string of n files, and f is equal to (f1, ellipsis, fn); supposing that the user acquires an index program, taking the file f as input and outputting a reverse index; giving a search item according to an auxiliary search protocol, setting a keyword as w, and representing a file set containing the word w in the file f by using fw, wherein if c which is equal to (c1, ellipsis, cn) is a set of encrypted files in the file f, cw represents a cipher text set of all the files in fw. By such a mode, the retrieval of encrypted data is realized, so that the privacy, the integrality and the verifiability can be guaranteed, the user can efficiently retrieve data through a search interface, and the data can also be safely added and deleted.

Description

technical field [0001] The invention relates to the field of encryption methods, in particular to a dynamically retrievable cloud computing data encryption method. Background technique [0002] File indexing is becoming increasingly important as the size of content stored on disk grows rapidly. Cloud storage services provide a highly accessible, easy-to-use, and inexpensive remote data source for those customers who cannot purchase and maintain their own storage facilities. Although many cloud storage applications require cloud provider-facing security (such as storing high-intensity business data or medical records), most services cannot fully guarantee that the provider can neither see nor modify the data. To a large extent, this is because current security measures (such as encryption or signatures) weaken the availability and performance of cloud storage. [0003] Companies often outsource their data to data centers. By storing data on third-party remote servers, cloud...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L29/06H04L29/08
Inventor 罗喜召
Owner SUZHOU UNIV
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