Ciphertext cloud-storage oriented document retrieval method and system

A document retrieval and cloud storage technology, applied in the field of information security, can solve the problem that the storage system cannot retrieve user documents, and achieve the effect of high security

Inactive Publication Date: 2011-04-20
INST OF SOFTWARE - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the document is in the encrypted state, the server has no way to obtain the name, keywords and other information of the document, and the storage system cannot retrieve the document for the user. The use

Method used

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  • Ciphertext cloud-storage oriented document retrieval method and system
  • Ciphertext cloud-storage oriented document retrieval method and system
  • Ciphertext cloud-storage oriented document retrieval method and system

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Embodiment Construction

[0053] The features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, many specific details are set forth in order to allow those skilled in the art to have a more comprehensive understanding of the present invention. Therefore, one skilled in the art does not need to follow some of the specific details described below in order to practice the present invention.

[0054] figure 1 The architecture diagram of the present invention is generally expressed, which is divided into four major components: index operation component, retrieval component, encryption and decryption component and cloud database access component. It includes: cloud database (that is, cloud storage data server), master key, key management component, index encryption and decryption component, file upload analysis component, file operation analysis component, index processing component, search field analysis component,...

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PUM

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Abstract

The invention discloses a ciphertext cloud-storage oriented document retrieval method and a ciphertext cloud-storage oriented document retrieval system, belonging to the technical field of information security. The method comprises the following steps: 1) a client generates an index key for a user by a master key imported by the user, and encrypts the index key by the master key, then stores the index key into a server; 2) after receiving the attribute metainformation of a document to be inquired input by a certain user, the client acquires a ciphertext of the index key from the server, then decrypts the ciphertext so as to obtain a decrypted index key; 3) the client encrypts the attribute metainformation of the document to be inquired by the decrypted index key, then sends the encrypted attribute metainformation to the server; and 4) the server carries out ciphertext retrieval on the index table according to the attribute metainformation, returning the retrieval records meeting the conditions to the client so as to obtain documents corresponding to the attribute metainformation. The system comprises a server and a plurality of clients, and the clients are respectively connected with the server through the Internet. The method and the system disclosed in the invention have the advantages that the security and retrieval efficiency of the ciphertext retrieval system are improved, and the expansibility is high.

Description

technical field [0001] The invention relates to the field of computer software, in particular to a document retrieval method and system for ciphertext cloud storage. It belongs to the field of information security technology. Background technique [0002] With the rapid development of cloud computing technology in recent years, a number of cloud storage systems represented by Amazon S3 have emerged. These cloud storage systems have the characteristics of elastic scalability, and charge according to the specific usage, users can obtain the huge storage space they need in a very short period of time. By using the cloud storage system, users can access data anytime and anywhere, and the operation is more convenient; enterprises also avoid the cost of data center construction and maintenance, which is generally more economical and cheap. It can be expected that in the future, cloud storage will be more widely used, and more and more users and enterprises will choose to use clo...

Claims

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Application Information

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IPC IPC(8): G06F17/30H04L29/06H04L29/08
Inventor 蔡克冯登国张敏陈驰徐震
Owner INST OF SOFTWARE - CHINESE ACAD OF SCI
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