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Regular Language Retrieval System in Secure Cloud Storage

A retrieval system and cloud storage technology, applied in transmission systems, digital transmission systems, secure communication devices, etc., can solve the problems of inability to support regular language search, storage and computing overhead, etc., and achieve efficient encryption and trapdoor generation algorithms. The effect of the efficiency advantage

Active Publication Date: 2020-06-12
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a regular language retrieval system in secure cloud storage, which can accommodate any number of symbols, and can add new The symbol greatly improves the practicability of the scheme; in addition, it can also reduce the storage overhead of the wireless terminal of the user and facilitate the flexible expansion of the system

Method used

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  • Regular Language Retrieval System in Secure Cloud Storage
  • Regular Language Retrieval System in Secure Cloud Storage
  • Regular Language Retrieval System in Secure Cloud Storage

Examples

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Embodiment Construction

[0036] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0037] A regular language retrieval system in secure cloud storage of the present invention, comprising a key generation center and a cloud server;

[0038] The key generation center is used to generate public key / private key pairs for users;

[0039] The cloud server is used to provide cloud storage services for users;

[0040] When the system is established, the key generation center generates public parameters and generates public / private key pairs for each user; then, the key generation center encrypts the data owner’s document data to generate ciphertext and sends it to the cloud server for storage. At the same time, the keyword string of the document data is encrypted to describe the document data;

[0041] When a user performs a data retrieval query, the private key is used to generate a search trapdoor through the key generation...

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Abstract

The invention relates to a regular language retrieval system for security cloud storage. Inputs of an encryption algorithm of the system are a public key and a regular language described by utilizinga character string with any length, and a generated ciphertext is sent to a cloud server; in a data retrieval stage, a user defines a deterministic finite automaton (DFA) and uses a private key to generate a trap door of the DFA, and the DFA defines a group of state transition sets, an initial state and an accepting state. When and only when the regular language embedded in the ciphertext is accepted by the trap door of the DFA, a document is regarded as a matching document. Random multiple symbols can be contained and new symbols can be added at any time, so that the practicality of the scheme is greatly improved; and in addition, the storage overhead of a wireless terminal of the user can be reduced, so that flexible expansion of the system is facilitated.

Description

technical field [0001] The invention relates to a regular language retrieval system in safe cloud storage Background technique [0002] Cloud storage is an emerging storage model that can provide users with scalable, flexible and pay-as-you-go services. For personal use, users can access their data anytime, anywhere and from any device. When a group of users uses cloud storage, it allows group members to synchronize and manage all shared documents. In addition, it saves users the capital investment for purchasing storage devices. While cloud storage provides convenience to customers, it also causes many security and privacy issues. All data is stored on multiple servers of the cloud service provider, so customers do not have full control over their data. Users are concerned about the privacy of their documents because servers could be hacked or insiders could leak data for commercial gain. Users want to use encryption technology to protect the confidentiality of data, w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F21/60G06F21/62H04L9/08H04L29/08
CPCG06F21/602G06F21/6209G06F21/6245G06F2221/2107H04L9/0863H04L67/1097
Inventor 杨旸张煜超郑相涵叶少珍张浩刘耿耿邹剑倪一涛
Owner FUZHOU UNIV
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