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Application layer file hiding method under NTFS file system

A file system and file hiding technology, applied in the field of information security, can solve problems such as slow speed and no consideration of data being overwritten, and achieve the effect of fast hiding speed and integrity assurance

Active Publication Date: 2014-01-29
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For NTFS system, in the patent " file hiding method based on NTFS disk file system structure (application number CN03118546.0) ", proposed a kind of file hiding mode of copying file to root directory data flow and deleting original file again, but this mode has One downside: Slower when the file size is large
However, this method does not consider the data being overwritten. When the file record is deleted, the corresponding bit of the $Bitmap metafile will be marked as unused, and future files will overwrite the previously hidden data.

Method used

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  • Application layer file hiding method under NTFS file system

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Embodiment Construction

[0036] The method will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0037] The file hiding method under the NTFS file system is divided into two modules, a data hiding module and a data recovery module.

[0038] The specific operation steps of the file hiding module are as follows:

[0039] ① Traverse the MFT table of the NTFS file system to find the file record information in the MFT table of the file to be hidden;

[0040] ② According to the file record information found in the first step, find the data of Data Run, where the starting logical sector of the data, the size of the occupied sector and other information are stored in DataRun;

[0041] ③ Write the above information into a custom Index file. This file will be used to restore the file data. If you want to restore the file, you can only use the Index file. If you don’t have this file, you can’t restore the data;

[0042] ④ Set the Header-Flag flag of the found...

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Abstract

The invention discloses an application layer file hiding method under an NTFS file system and belongs to the field of information safety. The method is based on the application layer and not related to system kernel, and the method only needs to operate a control end program on a mainframe requiring file hiding. The method mainly includes a file hiding module and a file recovery module. The file hiding module is used for hiding files in a file storage medium based on the NTFS file system, and the hidden files are independent of the file system. The file recovery module is used for recovering the hidden files to the NTFS file system so as to display the files. By the method high in operability, lightweight file hiding under the NTFS file system is achieved, information safety can be increased greatly, and data integrity can be protected.

Description

technical field [0001] The invention belongs to the field of information security, and in particular relates to an application layer file hiding method under an NTFS file system. It mainly provides a lightweight file hiding under the NTFS file system, so that the files have high security and data integrity. The technologies involved mainly include: file recovery technology under NTFS file system. Background technique [0002] With the development of the information age, the amount of information transmitted in the network is increasing explosively, and computers are used in all walks of life. However, behind the growth of information and the wide application of computers, the security risks brought by them cannot be ignored. For reasons of work or convenience, people save confidential data or personal private information in computers, but there are certain risks in storing files in computers. On the one hand, people do not want others to discover their private files. On the...

Claims

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Application Information

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IPC IPC(8): G06F21/60
CPCG06F21/80G06F2221/2107
Inventor 张小松牛伟纳李金栓陈瑞东王东杨高明冀风宇
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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