CN103164501A - Method and system of rapid file erasure of anti-recovery software - Google Patents

Method and system of rapid file erasure of anti-recovery software Download PDF

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Publication number
CN103164501A
CN103164501A CN2012102286964A CN201210228696A CN103164501A CN 103164501 A CN103164501 A CN 103164501A CN 2012102286964 A CN2012102286964 A CN 2012102286964A CN 201210228696 A CN201210228696 A CN 201210228696A CN 103164501 A CN103164501 A CN 103164501A
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China
Prior art keywords
file
concordance list
file destination
destination
sector
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CN2012102286964A
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Chinese (zh)
Inventor
肖新光
梁宝龙
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北京安天电子设备有限公司
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Priority to CN2012102286964A priority Critical patent/CN103164501A/en
Publication of CN103164501A publication Critical patent/CN103164501A/en

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Abstract

The invention provides a method and a system of rapid file erasure of anti-recovery software. The method includes: building a file system index table of an object file through the mode of path resolution; destroying the sector where the object file data is positioned through the resolution of the file system index table of the object file; and deleting an index corresponding to the object file of a parent directory. The invention further provides the system suitable for the method, through the system, the effect that when data storage capacity becomes larger and larger, or magnetic tracks are relatively narrow, a user can rapidly carry out the rapid and thorough file erasure of the anti-recovery software can be achieved, and time and economic losses are effectively prevented.

Description

The method and system that the anti-rapid file that recovers software is wiped

Technical field

The present invention relates to computer application field, relate in particular to the method and system that a kind of rapid file of anti-recovery software is wiped.

Background technology

The storage data track of present file storage medium is wider, data write inconsistent on magnetic track at every turn, the data that the data that write after having caused like this write before in fact not covering fully, and can use the physics micrurgy to recover by turn to seem capped and actual not capped data; So a lot of standards that existing file is wiped all relate to repeatedly to write to cover and wipe, to reach the purpose of indifference cover data storage track.Although the storage medium technology is in continuous progress, but it is increasing that the very narrow and data storage capacity that the storage data track has become becomes, and present data are recovered or scrub techniques really exist more and more intensive or when more and more narrow when magnetic track, the micro-amplification recovery technology inefficacy of physics; When data storage capacity was increasing, to cover the method efficient wipe low owing to repeatedly or repeatedly writing, and hinders user job efficient, brought time or loss economically to the user.

Summary of the invention

For the defective that prior art exists, the present invention proposes the method and system that a kind of rapid file of anti-recovery software is wiped, and concrete summary of the invention is as follows:

A kind of method that rapid file of anti-recovery software is wiped comprises:

Step a, resolve the file destination path, search the file system concordance list of file destination and determine the data memory sector position of file destination;

Step b, according to the data memory sector position of the file destination data memory sector with random gibberish coverage goal file, and the zone bit that will identify the sector is revised as unused state;

The file system concordance list of step c, the random gibberish coverage goal file of use;

Point to the directory index of file destination in the file system concordance list of steps d, deletion file destination parent directory.

Described parsing file destination path, the file system concordance list of searching file destination comprise, begin to resolve the file system concordance list of every one deck catalogue until parse the file system concordance list of file destination from root directory file system concordance list.

Described step b also comprises, when the shared disk space of file destination during greater than two sectors and with file header, and first sector of a coverage goal file data storage.

The system that a kind of rapid file of anti-recovery software is wiped comprises:

Search the unit, for parsing file destination path, search the data memory sector position of file system concordance list and definite file destination of file destination;

Delete cells is used for according to the data memory sector position of the file destination data memory sector with random gibberish coverage goal file, and the zone bit that will identify the sector is revised as unused state;

Capping unit is for the file system concordance list that uses random gibberish coverage goal file;

Erase unit, the file system concordance list that is used for deletion file destination parent directory points to the directory index of file destination.

Described parsing file destination path, the file system concordance list of searching file destination comprise, begin to resolve the file system concordance list of every one deck catalogue until parse the file system concordance list of file destination from root directory file system concordance list.

Described delete cells also comprises, when the shared disk space of file destination during greater than two sectors and with file header, and first sector of a coverage goal file data storage.

The invention provides the method and system that a kind of rapid file of anti-recovery software is wiped, wherein said method comprises: the mode of resolution path is obtained every one deck catalogue of root directory, file destination place catalogue layer and file system concordance list and the corresponding directory index data storage location of file destination; Destroy sector, file destination data place by the file system concordance list of resolving file destination; The corresponding index of deletion parent directory file destination; The invention allows for a kind of system that is applicable to the method, in the time of can realizing that data storage capacity is increasing by this system or when magnetic track is narrower, the user can be fast with having counter recover software thoroughly wipe fast file.

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 the method flow diagram that a kind of rapid file of anti-recovery software is wiped;

Fig. 2 is the system construction drawing that a kind of rapid file of anti-recovery software is wiped.

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.

By shown in Figure 1, a kind of method that rapid file of anti-recovery software is wiped specifically comprises:

S101, the mode of resolving the file destination path are searched the file system concordance list of file destination and are determined the data memory sector position of file destination; Wherein, described parsing file destination path, the file system concordance list of searching file destination comprises, begins to resolve the file system concordance list of every one deck catalogue until parse the file system concordance list of file destination from root directory file system concordance list.

S101 further is interpreted as to step: can split every one deck directory name of file destination is resolved with character string and separate; Then, parse the file system concordance list of disk partition root directory file according to the record of disk partition boot sector, file system concordance list by root directory finds file destination place ground floor catalogue and parses the file system concordance list of ground floor catalogue again, according to the mode recursion resolution of the file system concordance list that parses the ground floor catalogue until resolve every layer of catalogue of file destination, until find the file system concordance list of file destination; At last, find the data memory attribute of file destination by the file system concordance list of file destination, and store the place list of sectors according to the data of data memory attribute parsing file destination, determined that by its list of sectors the data of file destination are stored the place sector position;

S102, store the sector at place with the data of random gibberish coverage goal file according to the data memory sector position of determining file destination, and the zone bit that will identify the sector is revised as unused state; S102 is also comprised another kind of situation when the shared disk space of file destination during greater than two sectors and with file header, first sector of a coverage goal file data storage; This be because, how long common file storage needs, how long often wipe this file also needs; So, cause it to be resumed by the method that covers the first sector to reach the file header that destroys this document, can reduce in a large number the time of wiping file like this, effectively realized wiping fast file;

The file system concordance list of S103, the random gibberish coverage goal file of use;

Point to the directory index of file destination in the file system concordance list of S104, deletion file destination parent directory; S104 is interpreted as for step: the file system concordance list of the parent directory that parses by S101 finds file destination directory index memory location, and the index of file destination is wherein pointed in deletion;

Be exemplified as for above-mentioned method: suppose the path be C: 123 4.txt, its file destination is 4.txt;

At first, parse every one deck pathname in C: 123 4.txt according to the mode of resolving the file destination path, then to find every layer of catalogue be file system concordance list and the file destination 4.txt file system concordance list of C: 123 correspondences; Find again the data memory attribute of file destination by the file system concordance list of file destination, and store the place list of sectors according to the data of data memory attribute parsing file destination, determined that by its list of sectors the data of file destination 4.txt are stored the place sector position;

Then, with the sector at the data of random gibberish coverage goal file storage place, and the zone bit that will identify the sector is revised as unused state; When the shared disk space of file destination during greater than two sectors and with file header, first sector of a coverage goal file data storage; All with file header, for example the .txt file is exactly tape file head not due to not all file, so to be defined as with the file of file header be the Complicated Files header structure; So, if file greater than two sectors and with the be defined as super large file of file header;

at last, use the file system concordance list of random gibberish coverage goal file, then delete the directory index of the file system concordance list of parent directory file destination pointed, further be interpreted as: be the effect that reaches the fast thorough deleted file of anti-recovery software because the method that proposes in the present invention finally realizes purpose, if only delete the file system concordance list of file destination, do not reach the effect of thorough deletion, the file system concordance list that is file destination is deleted, do not affect the file system concordance list of parent directory, still can find file destination according to the file system concordance list of parent directory, so only the file system concordance list of coverage goal file is the purpose that does not reach the thorough deleted file of anti-recovery software, if the file system concordance list of the parent directory of deletion file destination, can reach to make and recover the purpose that software can't find file destination, reach the effect that file destination is thoroughly deleted, therefore just need to utilize the corresponding index of file destination name lookup file destination in the directory index data storage location of file destination parent directory and parent directory index, and with its corresponding index deletion, namely destroy the directory file system index of " 3 ", to reach the purpose that can't find file destination 4.txt, realize thorough deleted file, the anti-purpose of recovering software rejuvenation.

By shown in Figure 2, the system of a kind of method that applicable anti-rapid file that recovers software is wiped specifically comprises:

101, search the unit, for parsing file destination path, search the data memory sector position of file system concordance list and definite file destination of file destination; Wherein, described parsing file destination path, the file system concordance list of searching file destination comprises, begins to resolve the file system concordance list of every one deck catalogue until parse the file system concordance list of file destination from root directory file system concordance list.

102, delete cells is used for storing the sector at place with the data of random gibberish coverage goal file according to the data memory sector position of determining file destination, and the zone bit that will identify the sector is revised as unused state; Also comprise, when the shared disk space of file destination during greater than two sectors and with file header, first sector of a coverage goal file data storage; Cause it to be resumed by the method that covers the first sector to reach the file header that destroys this document, so just effectively realized wiping fast file;

103, capping unit is for the file system concordance list that uses random gibberish coverage goal file;

104, erase unit, the file system concordance list that is used for deletion file destination parent directory points to the directory index of file destination.

The system that the rapid file of a kind of anti-recovery software that proposes is wiped further is exemplified as: the hypothetical target file is 4.txt, its catalogue layer be C: 123 4.txt;

At first, by the directory name of searching the unit and obtain the every one deck of file destination path, namely " C: " “ 1 " “ 2 " “ 3 "; Find file system concordance list and its directory index data storage location of corresponding every layer of catalogue and file destination, and memory sector position, place; The data storage sector, place of completing determining file destination with delete cells covers, then the zone bit that will identify these sectors is revised as unused state, to reach the purpose of these sectors of recovery; At last, complete covering to the file system concordance list of file destination by capping unit, then by erase unit, the corresponding index of file destination is deleted; Further be interpreted as to complete erase unit for carrying out capping unit: when the file system concordance list of file destination deleted be the file system concordance list that does not affect parent directory, namely the file system index of file destination " 4.txt " is destroyed is not affect its parent directory “ 3 " the file system index; Therefore, the file system index by parent directory " 3 " still can find its file destination 4.txt's; But, if the file system index of parent directory " 3 " destroyed just can not find file destination 4.txt, just realize thorough deleted file, the counter purpose of recovering software rejuvenation this moment.

The invention provides the method and system that a kind of rapid file of anti-recovery software is wiped, wherein said method comprises: by the mode of resolving the file destination path be with every one deck directory name of file destination separate and find file destination the file system concordance list, destroy sector, file destination data place, destroy file system concordance list, the corresponding index of deletion parent directory file destination of file destination by the file system concordance list of resolving file destination; The invention allows for a kind of system that is applicable to the method, in the time of can realizing that data storage capacity is increasing by this system or when magnetic track is narrower, the user can be fast with having counter recover software thoroughly wipe fast file.

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 (6)

1. method that the anti-rapid file that recovers software is wiped comprises:
Step a, resolve the file destination path, search the file system concordance list of file destination and determine the data memory sector position of file destination;
Step b, according to the data memory sector position of file destination, with the data memory sector of random gibberish coverage goal file, and the zone bit that will identify the sector is revised as unused state;
The file system concordance list of step c, the random gibberish coverage goal file of use;
Point to the directory index of file destination in the file system concordance list of steps d, deletion file destination parent directory.
2. the method for claim 1, it is characterized in that, described parsing file destination path, the file system concordance list of searching file destination comprises, begins to resolve the file system concordance list of every one deck catalogue until parse the file system concordance list of file destination from root directory file system concordance list.
3. the method for claim 1, is characterized in that, described step b also comprises, when the shared disk space of file destination during greater than two sectors and with file header, and first sector of a coverage goal file data storage.
4. system that the anti-rapid file that recovers software is wiped comprises:
Search the unit, for parsing file destination path, search the data memory sector position of file system concordance list and definite file destination of file destination;
Delete cells is used for according to the data memory sector position of the file destination data memory sector with random gibberish coverage goal file, and the zone bit that will identify the sector is revised as unused state;
Capping unit is for the file system concordance list that uses random gibberish coverage goal file;
Erase unit, the file system concordance list that is used for deletion file destination parent directory points to the directory index of file destination.
5. system as claimed in claim 4, it is characterized in that, described parsing file destination path, the file system concordance list of searching file destination comprises, begins to resolve the file system concordance list of every one deck catalogue until parse the file system concordance list of file destination from root directory file system concordance list.
6. system as claimed in claim 4, is characterized in that, described delete cells also comprises, when the shared disk space of file destination during greater than two sectors and with file header, and first sector of a coverage goal file data storage.
CN2012102286964A 2012-07-04 2012-07-04 Method and system of rapid file erasure of anti-recovery software CN103164501A (en)

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CN104462602A (en) * 2014-12-30 2015-03-25 中国科学院上海微系统与信息技术研究所 File system with data processing function and use method thereof
CN105095107A (en) * 2014-05-04 2015-11-25 腾讯科技(深圳)有限公司 Buffer memory data cleaning method and apparatus

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CN1904845A (en) * 2006-08-01 2007-01-31 珠海金山软件股份有限公司 Method for recovering files deleted from FAT32 document system
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CN102332014A (en) * 2011-09-14 2012-01-25 奇智软件(北京)有限公司 Method and device for deleting file
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CN1359071A (en) * 2001-11-29 2002-07-17 上海格尔软件股份有限公司 Method for completely deleting files on hard disk
CN1904887A (en) * 2006-07-28 2007-01-31 珠海金山软件股份有限公司 Method for searching deleted document from assigned catalogue in FAT volume
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Application publication date: 20130619