Distributed safe retrieval system

A retrieval system and distributed technology, applied in computer security devices, instruments, computing and other directions, can solve problems such as increasing the communication overhead of management servers, and achieve the effect of distributed retrieval

Inactive Publication Date: 2010-04-14
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because each index server contains a large number of retrieval results, if a retrieval request is distributed to many index servers, it will greatly increase the communication overhead of the management server, which may cause the management server to become a communication bottleneck node

Method used

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Embodiment Construction

[0041] In order to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and examples.

[0042] figure 1 It is a schematic structural diagram of a distributed security retrieval system according to an embodiment of the present invention. Such as figure 1 As shown, the system includes user clients 1.1, 1.2, ..., 1.n, management server 2, index server 3.1, 3.2, ..., 3.m, encryption server 4 and key matrix 5, n is A positive integer indicates the number of user clients, and m is a positive integer greater than or equal to 2, indicating the number of index servers. For the convenience of expression, user clients 1.1, 1.2, . . . , 1.n and index servers 3.1, 3.2, . The user client 1 is connected to the management server 2 through the Internet, the management server 2, the index server 3 and the encryption server 4 are interconnected through the internal network, and th...

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Abstract

The invention discloses a distributed safe retrieval system, which belongs to the technical field of computer information retrieval, and comprises a user client end which sends out index and retrieval requests to a management server, a management server which distributes indexes and retrieval instructions of a user client end to a retrieval server, and receives processing results and returns to the user client end, an index server which stores distributed ciphertext inverted index, receives index and retrieval instructions submitted by the management server, and returns results, an encryption server which receives the encryption request of the management server, enciphers to index terms and terms according to appointed keys, and returns information after enciphering, and a key matrix which stores encryption keys of index terms and terms. The invention further discloses an index and retrieval method suitable for the distributed safe retrieval system. The invention can achieve highly-effective retrieval and safety requirements of large-scale secret-related documents, simultaneously lowers the risk that ciphertext inverted index suffers statistic attack, and optimizes the communication load of the management server.

Description

technical field [0001] The invention belongs to the fields of computer information retrieval technology and information security technology, and in particular relates to a distributed security retrieval system. Background technique [0002] The development of computer technology has greatly improved the efficiency of document management, and information retrieval technology has improved the management efficiency of electronic documents to the extreme. By establishing an inverted index for the document, fast retrieval based on the index term (Term) can be realized. At present, most of the information retrieval systems are applied to the management of non-secret-related ordinary documents, but in military, government and large enterprises and other application fields, it is necessary to manage a large number of confidential documents. Therefore, a secure retrieval system is needed to Improve the management efficiency of confidential documents. A secure retrieval system for s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30G06F21/00G06F21/62
Inventor 李瑞轩高国强文坤梅辜希武吴炜卢正鼎胡和平路松峰左翠华燕昆
Owner HUAZHONG UNIV OF SCI & TECH
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