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Deleted file recovery method and device and storage medium

A technology for deleting files and restoring methods, applied in the file system, file/folder operations, and the generation of response errors, etc., can solve problems such as affecting user experience, low recovery success rate, and immature deletion recovery technology.

Active Publication Date: 2019-06-07
XIAMEN MEIYA PICO INFORMATION
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the deletion recovery technology based on the JFFS2 file system is immature, the recovery success rate is low, and the recovery speed is slow, which affects the user experience and cannot meet the urgent needs of the computer forensics security field.

Method used

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  • Deleted file recovery method and device and storage medium
  • Deleted file recovery method and device and storage medium
  • Deleted file recovery method and device and storage medium

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Embodiment Construction

[0047] The application will be further described in detail below with reference to the drawings and embodiments. It can be understood that the specific embodiments described here are only used to explain the related invention, but not to limit the invention. In addition, it should be noted that, for ease of description, only the parts related to the relevant invention are shown in the drawings.

[0048] It should be noted that the embodiments in the application and the features in the embodiments can be combined with each other if there is no conflict. Hereinafter, the present application will be described in detail with reference to the drawings and in conjunction with embodiments.

[0049] The present invention first introduces the related knowledge of JFFS2, which helps to understand the file recovery method of the present invention. JFFS2 stores the data and original data of the file system in the flash memory (FLASH) in the form of nodes. Specifically, the definition of the ...

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Abstract

The invention provides a deleted file recovery method and device and a storage medium. The method comprises the following steps: traversing: traversing FLASH to obtain a set U of effective nodes whichare sequentially arranged on the FLASH; a classification step: dividing the set U into a set D of DIRENT nodes on FLASH and a set I of INODE nodes on FLASH according to the type of each effective node in the set U; and a recovery step: constructing a directory structure of the deleted file according to the set D and the set I, and recovering the deleted file. According to the method and the device, data recovery based on the FLASH node is realized. According to the invention, recovery or partial recovery of the deleted file under complex conditions can be realized, the success rate of file recovery is improved, evidence collection of data is facilitated, and the user experience is improved.

Description

Technical field [0001] The invention relates to the technical field of computer data recovery, in particular to a recovery method, device and storage medium for deleted files. Background technique [0002] JFFS2 file system is a file system widely used in embedded devices. With the development and popularization of the Internet of Things technology, its deleted file recovery technology will be a hot spot in the field of smart device security and network information security. At present, the deletion and recovery technology based on the JFFS2 file system is immature, the recovery success rate is low, and the recovery speed is slow, which affects the user experience and cannot meet the urgent needs of the computer forensics security field. Summary of the invention [0003] In view of the above-mentioned defects in the prior art, the present invention proposes the following technical solutions. [0004] A method for recovering deleted files, the method includes: [0005] In the travers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F11/14G06F16/16
Inventor 沈长达黄君灿吴少华肖华斌
Owner XIAMEN MEIYA PICO INFORMATION
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