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Searchable encryption method of multiple keywords at specified location in cloud storage

A technology of specifying location and encryption method, applied in the field of information security, can solve the problem of unable to realize keyword retrieval and other problems

Active Publication Date: 2015-11-11
佛山市明茂网络科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a searchable encryption method for multiple keywords at a specified location in cloud storage, which solves the problem that keyword retrieval cannot be realized after cloud storage data encryption exists in the prior art

Method used

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  • Searchable encryption method of multiple keywords at specified location in cloud storage
  • Searchable encryption method of multiple keywords at specified location in cloud storage
  • Searchable encryption method of multiple keywords at specified location in cloud storage

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Embodiment Construction

[0050] The present invention will be described in detail below in combination with specific embodiments.

[0051] A searchable encryption method for a plurality of keywords in a specified position in the cloud storage of the present invention is specifically implemented according to the following steps:

[0052] Step 1. System parameter initialization:

[0053] Specifically follow the steps below to implement:

[0054] Step (1.1), the security parameter k is input by the file encryptor Ent, and two multiplicative cyclic groups G whose order is a prime number q are output 1 and G 2 , g 1 for G 1 generator, g 2 for G 2 generator of

[0055] Step (1.2), select a bilinear map

[0056] Step (1.3), randomly and uniformly select x∈Z q As the master key of the file encryptor Ent, denoted as msk E n t = x ∈ Z q * ...

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Abstract

The invention discloses a searchable encryption method of multiple keywords at the specified location in cloud storage. The method is implemented specifically according to the following steps: Step 1, system parameter initialization; Step 2, user adding; Step 3, file encryption and security index generation by a file owner; Step 4, index re-encryption by a server; Step 5, generation of keyword search token by a user; Step 6, search of ciphertext keywords by a cloud storage server; Step 7, decryption of ciphertexts by the user; and Step 8, user revocation. By the method, the problem that keyword search cannot be realized after cloud storage data encryption in the prior art is solved.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to an encryption method in which multiple keywords at designated positions in cloud storage can be searched. Background technique [0002] As a new computing model, cloud computing can provide various advanced computing services with low cost and scalability. In order to save the cost of storing and managing data, enterprises and individuals can outsource data to cloud storage servers. The data provided by the cloud storage service has the advantages of availability and reliability, but it also has an obvious disadvantage, that is, the data is not under the management and control of the user, so how to maintain the confidentiality and integrity of the data becomes an urgent concern of the user. question. [0003] Although enterprises believe in the reliability, availability, fault tolerance, etc. of cloud storage service providers (CloudStorageServiceProvid...

Claims

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Application Information

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IPC IPC(8): H04L9/08G06F17/30H04L29/08
Inventor 王尚平张亚玲王晓峰
Owner 佛山市明茂网络科技有限公司
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