CN103164656A - Method and system for erasing hidden file based on visible file - Google Patents
Method and system for erasing hidden file based on visible file Download PDFInfo
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- CN103164656A CN103164656A CN2012101771144A CN201210177114A CN103164656A CN 103164656 A CN103164656 A CN 103164656A CN 2012101771144 A CN2012101771144 A CN 2012101771144A CN 201210177114 A CN201210177114 A CN 201210177114A CN 103164656 A CN103164656 A CN 103164656A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000012217 deletion Methods 0.000 claims abstract description 15
- 230000037430 deletion Effects 0.000 claims abstract description 15
- 230000035772 mutation Effects 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 8
- 238000004321 preservation Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
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Abstract
The invention provides a method and a system for erasing a hidden file based on a visible file. The provided method mainly comprises that corresponding information set in file information of a document is searched and gibberish is applied to cover a set file, and on the basic of unrecoverable deletion of the visible file, unrecoverable erasing of a backup file automatically stored by an editing tool of the applied editing document is achieved. Meanwhile, the invention further provides the system for erasing the hidden file based on the visible file. The system comprises unrecoverable erasing for the visible file and a system invisible file and unrecoverable erasing for a visible file and a system invisible file of the backup file automatically stored by the editing tool. The method and the system can completely delete user documents and user files which are automatically stored by various document editing tools, effectively prevent leakage of user data information, and ensure safety of the user information.
Description
Technical field
The present invention relates to field of computer information security, relate in particular to the method and system of wiping hidden file based on visible mutation.
Background technology
At present, the typesetting instrument provides automatic preservation backup functionality also to make the user want the difficulty that thoroughly clears data and become simultaneously in order to protect the customer documentation data to be difficult for loss.Office document typesetting instrument for example, when the user revises preservation, a storage area storage current document is looked in the capital again, the rear deletion of renaming of document information before revise preserving, although can't see the document of revising before preserving in system, recover software and can recover easily.The principle of the automatic preservation backup functionality that same office document typesetting instrument provides is to create an interim document to be used for preserving current content under the catalogue of office or user's appointment, if after document is normally closed, these transient documents are with deleted, system is invisible, but recovering software still can recover.Even if this just causes the user thoroughly to delete visible document, the threat of leakage is arranged still still.
The user is in public places after Edit Document, even if the document that deletion is edited is not deleted all information in fact veritably, and the threat that will cause like this user profile leakage to bring many information securities.And at present, a cover really can thoroughly not deleted the method for document and associated documents; So, how can thoroughly delete user's institute's Edit Document and relevant information becomes the problem that present urgent need will solve.
Summary of the invention
For the problem of above-mentioned required solution, the invention provides a kind of method and system of wiping hidden file based on visible mutation, concrete summary of the invention is as follows:
A kind of method of wiping hidden file based on visible mutation comprises:
Search MFT or the FAT fileinfo of customer documentation; Wherein, the MFT of described customer documentation or FAT fileinfo comprise: the file identification of the file status sign of customer documentation, the file data address of customer documentation, customer documentation, the MFT of customer documentation or FAT use Status Flag;
The file status sign of described customer documentation is set to the deletion state;
Search disk position, customer documentation place according to the file data address of described customer documentation, use gibberish to cover customer documentation;
Use Status Flag to change unused state into MFT or the FAT of described customer documentation;
According to the file identification traversal customer documentation place disk partition of customer documentation, search the user invisible document identical with the file identification of customer documentation and MFT or the FAT fileinfo of the invisible document of user thereof; Wherein, the MFT of the invisible document of described user or FAT fileinfo comprise: the file data address of the invisible document of user;
Document files data address invisible according to the user searched disk position, the invisible document of user place makes gibberish cover the invisible document of user;
The file identification of customer documentation is deleted.
Described use gibberish covers customer documentation and also comprises:
Wipe the parent directory file index of customer documentation place file directory, the file data of customer documentation shared sector Status Flag is revised as upstate.
Described customer documentation comprises: user's Edit Document and/or user's edit tool that Edit Document is used are preserved the document of backup automatically.
The invisible document of described user comprises: the invisible document of the system of user's Edit Document and/or user's edit tool that Edit Document is used are preserved the invisible document of system corresponding to user's Edit Document of backup automatically.
Described method also comprises:
According to the configuration information of edit tool that customer documentation is used, obtain and use the catalogue that edit tool is preserved backup document automatically.
A kind of system of wiping hidden file based on visible mutation comprises:
First searches the unit, is used for searching MFT or the FAT fileinfo of customer documentation; Wherein, the MFT of described customer documentation or FAT fileinfo comprise: the file identification of the file status sign of customer documentation, the file data address of customer documentation, customer documentation, the MFT of customer documentation or FAT use Status Flag;
Setting unit, the file status sign that is used for described customer documentation is set to the deletion state;
Capping unit is used for searching disk position, customer documentation place according to the file data address of described customer documentation, uses gibberish to cover customer documentation;
Processing unit is used for using Status Flag to change unused state into MFT or the FAT of described customer documentation;
Second searches the unit, is used for the file identification traversal customer documentation place disk partition according to customer documentation, searches the user invisible document identical with the file identification of customer documentation and MFT or the FAT fileinfo of the invisible document of user thereof; Wherein, the MFT of the invisible document of described user or FAT fileinfo comprise: the file data address of the invisible document of user;
Erase unit is searched disk position, the invisible document of user place for document files data address invisible according to the user and is made gibberish cover the invisible document of user;
Delete cells is used for the customer documentation file identification is deleted.
Described use gibberish covers customer documentation and also comprises:
Wipe the parent directory file index of customer documentation place file directory, the file data of customer documentation shared sector Status Flag is revised as upstate.
Described user's document comprises: user's Edit Document and/or user's edit tool that Edit Document is used are preserved the document of backup automatically.
The invisible document of described user comprises: the invisible document of the system of user's Edit Document and/or user's edit tool that Edit Document is used are preserved the invisible document of system corresponding to user's Edit Document of backup automatically.
Described system also comprises:
According to the configuration information of edit tool that customer documentation is used, obtain and use the catalogue that edit tool is preserved backup document automatically.
The present invention proposes a kind of method and system of wiping hidden file based on visible mutation; Propose a kind of to wipe the hidden file method be MFA by searching customer documentation or FAT fileinfo user's visible document and invisible document are carried out thoroughly file data wipes processing based on visible mutation; Namely adopt the fileinfo of customer documentation to arrange and revise, use gibberish again and cover it file is set, the edit tool of realizing completing on the basis to the irrecoverable deletion of visible document the Edit Document of using is automatically preserved the irrecoverable of backup file and is wiped; Simultaneously, the present invention also proposes a kind of system of wiping hidden file based on visible mutation and comprises, first searches unit, setting unit, capping unit, processing unit, second searches unit, erase unit, delete cells, the invisible file of visible mutation and system irrecoverable is wiped irrecoverable the wiping of the invisible file of visible mutation and system of carrying out automatically preserving the file of backup with edit tool.Proposition of the present invention has realized the thorough deletion to customer documentation and the invisible document of user, has prevented that effectively the user data leakage from having guaranteed user information safety.
Description of drawings
In order to be illustrated more clearly in the present invention or technical scheme of the prior art, the below will do to introduce simply to the accompanying drawing of required use in embodiment or description of the Prior Art, apparently, the accompanying drawing that the following describes is only some embodiment that put down in writing in the present invention, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is a kind of process flow diagram of wiping the method for hidden file based on visible mutation;
Fig. 2 is a kind of system construction drawing of wiping hidden file based on visible mutation.
Embodiment
In order to make those skilled in the art person understand better technical scheme in the embodiment of the present invention, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, technical scheme in the present invention is described in further detail.
A kind of method of wiping hidden file based on visible mutation as shown in Figure 1, comprising:
S101: MFT or the FAT fileinfo of searching customer documentation; Wherein, the MFT of described customer documentation or FAT fileinfo comprise: the file identification of the file status sign of customer documentation, the file data address of customer documentation, customer documentation, the MFT of customer documentation or FAT use Status Flag;
S102: the file status sign of described customer documentation is set to the deletion state;
S103: search disk position, customer documentation place according to the file data address of described customer documentation, use gibberish to cover customer documentation;
S104: use Status Flag to change unused state into MFT or the FAT of described customer documentation;
S105: according to the file identification traversal customer documentation place disk partition of customer documentation, search the user invisible document identical with the file identification of customer documentation and MFT or the FAT fileinfo of the invisible document of user thereof; Wherein, the MFT of the invisible document of described user or FAT fileinfo comprise: the file data address of the invisible document of user; Automatically preserve file so can more effectively wipe more accurately these by the file identification traversal customer documentation place disk partition of the customer documentation in MFT or FAT information to the document Direct Analysis that system preserves automatically or the user preserves, and the traversal API that does not provide by windows travels through, because windows API traversal is less than these files;
S106: document files data address invisible according to the user searched disk position, the invisible document of user place makes gibberish cover the invisible document of user;
S107 deletes the file identification of customer documentation; Wherein the invisible document of customer documentation and user is the identical file sign.
Using gibberish to cover customer documentation for described S103 also comprises:
Wipe the parent directory file index of customer documentation place file directory, the file data of customer documentation shared sector Status Flag is revised as upstate.
Also comprise for described S104:
According to the configuration information of edit tool that customer documentation is used, obtain and use the catalogue that edit tool is preserved backup document automatically, wherein, described configuration information comprises: the version number of edit tool, installation path.
In above-mentioned steps, the MFT of customer documentation or FAT fileinfo comprise: user's Edit Document and/or user's edit tool that Edit Document is used are preserved the document of backup automatically; The invisible document of user comprises: the invisible document of the system of user's Edit Document and/or user's edit tool that Edit Document is used are preserved the invisible document of system corresponding to user's Edit Document of backup automatically.
A kind of system of wiping hidden file based on visible mutation as shown in Figure 2, comprising:
Search the unit at 101: the first, be used for searching MFT or the FAT fileinfo of customer documentation; Wherein, the MFT of described customer documentation or FAT fileinfo comprise: the file identification of the file status sign of customer documentation, the file data address of customer documentation, customer documentation, the MFT of customer documentation or FAT use Status Flag;
102: setting unit, the file status sign that is used for described customer documentation is set to the deletion state;
103: capping unit, be used for searching disk position, customer documentation place according to the file data address of described customer documentation, use gibberish to cover customer documentation;
104: processing unit is used for using Status Flag to change unused state into MFT or the FAT of described customer documentation;
Search the unit at 105: the second, be used for the file identification traversal customer documentation place disk partition according to customer documentation, search the user invisible document identical with the file identification of customer documentation and MFT or the FAT fileinfo of the invisible document of user thereof; Wherein, the MFT of the invisible document of described user or FAT fileinfo comprise: the file data address of the invisible document of user;
106: erase unit, search disk position, the invisible document of user place for document files data address invisible according to the user and make gibberish cover the invisible document of user, and the file identification of customer documentation is deleted;
107: delete cells is used for the file identification of customer documentation is deleted.
Covering customer documentation in the use gibberish described in 103 also comprises:
Wipe the parent directory file index of customer documentation place file directory, the file data of customer documentation shared sector Status Flag is revised as upstate.
MFT or FAT fileinfo at customer documentation described in system comprise: user's Edit Document and/or user's edit tool that Edit Document is used are preserved the document of backup automatically;
The invisible document of described user comprises: the invisible document of the system of user's Edit Document and/or user's edit tool that Edit Document is used are preserved the invisible document of system corresponding to user's Edit Document of backup automatically.
Also comprise in 104 steps:
Configuration information according to edit tool that customer documentation is used, obtain and use the catalogue that edit tool is preserved backup document automatically, wipe the application edit tool and automatically preserve the customer documentation of backup, wherein, described configuration information comprises: the version number of edit tool, installation path.
The specific embodiment that proposes is provided further explains:
Be illustrated with the office edit tool at this;
For example, the user F: test test.doc sets up is the WORD document, at first, file data address, file status sign and the file identification of the customer documentation by searching MFT or FAT information, it can be new technology file system, (Flag) sign of MFT, and the file status sign of its customer documentation is set to the deletion state; Then, find the partition address F dish of its file destination by file data, use gibberish that its user's Edit Document file in the F dish is covered; Use Status Flag to change unused state into MFT or the FAT of customer documentation, the file data that it is wiped is irrecoverable, namely reaches to recover the effect that software can't recover.
Secondly, the document that can edit the user of office edit tool for example, namely customer documentation carries out automatically preserving backing up; Directly delete when office closes or to customer documentation, it is in fact really not deleted that these preserve backup document automatically, because also there be invisible document corresponding to a kind of customer documentation; If the traversal API that provides by windows travels through, windows API traversal does not just reach thorough deletion less than these invisible documents yet so; So automatically preserve file and adopt the MFT of traversal file system or FAT information File sign can more effectively wipe more accurately these to the Direct Analysis of file system, the final realization thoroughly deleted user institute Edit Document.
The present invention proposes a kind of method and system of wiping hidden file based on visible mutation, wherein, described method is mainly utilized the fileinfo setting of the MFT of document or FAT and is used gibberish and covers it file is set, and the edit tool of realizing completing on the basis to the irrecoverable deletion of visible mutation the Edit Document of using is automatically preserved the irrecoverable of backup file and wiped; Simultaneously, the present invention also proposes a kind of system of wiping hidden file based on visible mutation and comprises that first searches unit, setting unit, capping unit, processing unit, second and search unit, erase unit, delete cells: wherein, search the unit by first and search the MFT of customer documentation or the fileinfo of FAT, then search unit, erase unit, delete cells by setting unit, capping unit, processing unit, second and carry out respective handling and realize customer documentation and the invisible document of user are thoroughly deleted by searching to first information that the unit obtains; Customer documentation and the automatic customer documentation of preserving of various Edit Document instrument have thoroughly been deleted in proposition of the present invention, have namely realized the thorough deletion to customer documentation and the invisible document of user, have prevented that effectively the leakage of user data information from guaranteeing user information safety.
Although described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and do not break away from spirit of the present invention, wish that appended claim comprises these distortion and variation and do not break away from spirit of the present invention.
Claims (10)
1. a method of wiping hidden file based on visible mutation, is characterized in that, comprising:
Search MFT or the FAT fileinfo of customer documentation; Wherein, the MFT of described customer documentation or FAT fileinfo comprise: the file identification of the file status sign of customer documentation, the file data address of customer documentation, customer documentation, the MFT of customer documentation or FAT use Status Flag;
The file status sign of described customer documentation is set to the deletion state;
Search disk position, customer documentation place according to the file data address of described customer documentation, use gibberish to cover customer documentation;
Use Status Flag to change unused state into MFT or the FAT of described customer documentation;
According to the file identification traversal customer documentation place disk partition of customer documentation, search the user invisible document identical with the file identification of customer documentation and MFT or the FAT fileinfo of the invisible document of user thereof; Wherein, the MFT of the invisible document of described user or FAT fileinfo comprise: the file data address of the invisible document of user;
Document files data address invisible according to the user searched disk position, the invisible document of user place makes gibberish cover the invisible document of user;
The customer documentation file identification is deleted.
2. the method for claim 1, is characterized in that, described use gibberish covers customer documentation and also comprises:
Wipe the parent directory file index of customer documentation place file directory, the file data of customer documentation shared sector Status Flag is revised as upstate.
3. the method for claim 1, is characterized in that, described customer documentation comprises: user's Edit Document and/or user's edit tool that Edit Document is used are preserved the document of backup automatically.
4. the method for claim 1, it is characterized in that, the invisible document of described user comprises: the invisible document of the system of user's Edit Document and/or user's edit tool that Edit Document is used are preserved the invisible document of system corresponding to user's Edit Document of backup automatically.
5. method as described in claim 3 or 4, is characterized in that, also comprises:
According to the configuration information of edit tool that customer documentation is used, obtain and use the catalogue that edit tool is preserved backup document automatically.
6. a system of wiping hidden file based on visible mutation, is characterized in that, comprising:
First searches the unit, is used for searching MFT or the FAT fileinfo of customer documentation; Wherein, the MFT of described customer documentation or FAT fileinfo comprise: the file identification of the file status sign of customer documentation, the file data address of customer documentation, customer documentation, the MFT of customer documentation or FAT use Status Flag;
Setting unit, the file status sign that is used for described customer documentation is set to the deletion state;
Capping unit is used for searching disk position, customer documentation place according to the file data address of described customer documentation, uses gibberish to cover customer documentation;
Processing unit is used for using Status Flag to change unused state into MFT or the FAT of described customer documentation;
Second searches the unit, is used for the file identification traversal customer documentation place disk partition according to customer documentation, searches the user invisible document identical with the file identification of customer documentation and MFT or the FAT fileinfo of the invisible document of user thereof; Wherein, the MFT of the invisible document of described user or FAT fileinfo comprise: the file data address of the invisible document of user;
Erase unit is searched disk position, the invisible document of user place for document files data address invisible according to the user and is made gibberish cover the invisible document of user;
Delete cells is used for the file identification of customer documentation is deleted.
7. system as claimed in claim 6, is characterized in that, described use gibberish covers customer documentation and also comprises:
Wipe the parent directory file index of customer documentation place file directory, the file data of customer documentation shared sector Status Flag is revised as upstate.
8. system as claimed in claim 6, is characterized in that, described user's document comprises: user's Edit Document and/or user's edit tool that Edit Document is used are preserved the document of backup automatically.
9. system as claimed in claim 6, it is characterized in that, the invisible document of described user comprises: the invisible document of the system of user's Edit Document and/or user's edit tool that Edit Document is used are preserved the invisible document of system corresponding to user's Edit Document of backup automatically.
10. system as claimed in claim 8 or 9, is characterized in that, also comprises:
According to the configuration information of edit tool that customer documentation is used, obtain and use the catalogue that edit tool is preserved backup document automatically.
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| CN201210177114.4A CN103164656B (en) | 2012-06-01 | 2012-06-01 | Based on the method and system of visible mutation erasing hidden file |
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| CN201210177114.4A CN103164656B (en) | 2012-06-01 | 2012-06-01 | Based on the method and system of visible mutation erasing hidden file |
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| CN103164656B (en) | 2015-12-16 |
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Denomination of invention: Method and system for erasing hidden file based on visible file Effective date of registration: 20181119 Granted publication date: 20151216 Pledgee: Shanghai Pudong Development Bank Limited by Share Ltd Harbin branch Pledgor: Beijing ahtech network Safe Technology Ltd Registration number: 2018990001084 |
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Date of cancellation: 20200508 Granted publication date: 20151216 Pledgee: Shanghai Pudong Development Bank Limited by Share Ltd Harbin branch Pledgor: BEIJING ANTIY NETWORK TECHNOLOGY Co.,Ltd. Registration number: 2018990001084 |