Encrypted data file storage and retrieval system and method

Abstract

The invention discloses an encrypted data file storage and retrieval method. The method comprises the steps that after content metadata is extracted from a data file, the data file is encrypted to generate an encrypted data file to be stored in storage equipment of a cloud storage system; the content metadata is added with a file global identifier of the data file in an encrypted state and then stored in a content metadatabase of the cloud storage system; when the encrypted data file stored in the cloud storage system is retrieved, the content metadatabase is retrieved through an inverted index method to acquire the file global identifier matched with a retrieval keyword, and attribute information and content information of the encrypted data file corresponding to the file global identifier are listed to serve as a retrieval result. According to the method, the content metadata is extracted before the data file is encrypted, the file global identifier of the file in the encrypted state is added into the content metadata, the encrypted data file stored in the cloud storage system is retrieved through the file global identifier, and the retrieval convenience of the data file is guaranteed while the safety and the privacy of the data file in a cloud storage environment are guaranteed.

Description

technical field [0001] The invention relates to the technical field of information security, in particular to a system and method for storing and retrieving encrypted data files based on a cloud storage system. Background technique [0002] Compared with traditional data file storage methods, cloud storage technology has many advantages: [0003] (1) The cost is low. In the traditional way, users need to purchase a large number of basic equipment such as servers and hard disks, and also need to upgrade the equipment regularly. In the cloud storage environment, users no longer need to purchase these basic equipment. On the one hand, it saves The cost of purchasing basic equipment is reduced, and the cost of maintenance is also reduced on the other hand; [0004] (2) Good scalability. For small and medium-sized enterprises, it is difficult to estimate the required storage capacity in the early stage, but cloud storage can solve this problem very well. In the early stage, you ...

AI Technical Summary

Problems solved by technology

[0009] The invention provides a system and method for storing and retrieving encrypted data files, which solves the problems of difficult retrieval of encrypted data files and slow retrieval speed, and can quickly retrieve the required encrypted data file information on the basis that the data files are in an encrypted state

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