CN100454307C - Method for completely crashing file data in FAT roll - Google Patents
Method for completely crashing file data in FAT roll Download PDFInfo
- Publication number
- CN100454307C CN100454307C CNB2006101222476A CN200610122247A CN100454307C CN 100454307 C CN100454307 C CN 100454307C CN B2006101222476 A CNB2006101222476 A CN B2006101222476A CN 200610122247 A CN200610122247 A CN 200610122247A CN 100454307 C CN100454307 C CN 100454307C
- Authority
- CN
- China
- Prior art keywords
- file
- fat
- user
- filling
- file data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The related complete-crushing method for data in FAT file comprises: a. positioning the file directory according to user input; b. obtaining the FAT chain according to initial file cluster; c. filling the cluster as user request included character type and times; d. modifying file name by garbage character string; e. canceling the file. Unlike to prior art, this invention can complete cancel the file.
Description
Technical field
The present invention relates to computer application field, relate in particular to a kind of method of thorough deleted file data.
Background technology
User often some unwanted file needs deletion, after general deletion action is carried out, for the common computer user, seem from disk, to have deleted, and being these file datas, actual conditions from disk, do not delete, briefly, what the user deleted is that this document is stored in some important informations in the file system (as FAT volume, NTFS volume), such as file name, position etc. in disk, cause computing machine to can not find the position of this document in disk, concerning the operator, just be equivalent to file delete.For this common file delete method, having many data to recover software at present can recover it, therefore, after some files that relate to certain secret privacy are adopted common file delete method deletion, might the enough data recovery tools of energy and method recover, be not that the user is desirable when such result is most of, for this class file, the user often wishes that with its thorough deletion the method that this invention addresses this problem just can not be recovered with the data after this method deletion.
Summary of the invention
The present invention has overcome shortcoming of the prior art, and the method for file data in a kind of thorough pulverizing FAT volume is provided, and causes the file after the deletion to recover.
In order to solve the problems of the technologies described above, be achieved through the following technical solutions:
Thoroughly pulverize the method for file data in the FAT volume, it comprises the steps:
A, according to the directory entry of file path location this document of user input;
B, obtain the FAT watch chain according to file starting cluster position in the above-mentioned directory entry;
C, with bunch the filling of FAT watch chain correspondence by the rule of user's request, should
Rule comprises the number of times of filling, filling with what character;
D, revise the filename of user's specified file with the garbage character string;
E, deletion this document.
The inventive method is different with existing deleted file method, the present invention fundamentally deletes file content from disk, not only deletion from FAT table, and revised information on the disk of original place, replace with garbage character, so just thoroughly deleted this file.
Description of drawings
Fig. 1 is the inventive method Chinese process flow diagram.
Embodiment
Introduce the process and the principle of work of the inventive method below with reference to Fig. 1.
A. locate the directory entry of this document according to the file path of user's input; File (file) is the format management with directory entry in the FAT volume, and each file (file) all has directory entry separately, comprises project information such as file (catalogue) name, file starting cluster information, file size and creation-time in the directory entry.Suppose to treat the deleted file path be D: food milk.doc, promptly find the directory entry of milk.doc file.
B. obtain the FAT watch chain according to file starting cluster position in the above-mentioned directory entry; Described in step a, comprise file starting cluster information in the directory entry, the starting cluster of supposing this milk.doc file is 3, can navigate to the 3rd in the FAT table, suppose that this middle content is 5, the 5th in navigating to FAT table then, the rest may be inferred, up to finding the FAT of end mark item is arranged, also just obtain bunch chain of this document.
C. with bunch the filling by the rule of user's request of FAT watch chain correspondence, this rule comprises number of times of filling, filling with what character etc.; Also promptly the 3rd, 5,7 bunch of attaining the Way among the step b filled it with specific character, to replace original content, as for specifically using what character, filling number of times etc. is set by the developer, can use one or several specific character circulations repeatedly to fill, also can use a plurality of random characters once to fill.
D. revise the filename of user's specified file with the garbage character string; Use which kind of garbage character and garbage character length etc. to set by the developer.
E. delete this document.
Above step is the unrestricted technical scheme of the present invention in order to explanation only.Any modification or partial replacement that does not break away from spirit and scope of the invention all should be encompassed in the middle of the claim scope of the present invention.
Claims (3)
1, thoroughly pulverizes the method for file data in the FAT volume, it is characterized in that it comprises the steps:
A. locate the directory entry of this document according to the file path of user's input;
B. obtain the FAT watch chain according to file starting cluster position in the above-mentioned directory entry;
C. bunch filling FAT watch chain correspondence by the rule of user's request;
D. revise the filename of user's specified file with the garbage character string;
E. delete this document.
2, the method for file data in the thorough pulverizing FAT volume according to claim 1 is characterized in that rule comprises the number of times of filling, filling with what character described in the step c.
3, the method for file data in the thorough pulverizing FAT volume according to claim 1 is characterized in that the concrete grammar of step c is to use same character that all bunches of FAT watch chain correspondence are filled up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101222476A CN100454307C (en) | 2006-09-19 | 2006-09-19 | Method for completely crashing file data in FAT roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101222476A CN100454307C (en) | 2006-09-19 | 2006-09-19 | Method for completely crashing file data in FAT roll |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1928868A CN1928868A (en) | 2007-03-14 |
| CN100454307C true CN100454307C (en) | 2009-01-21 |
Family
ID=37858831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006101222476A Active CN100454307C (en) | 2006-09-19 | 2006-09-19 | Method for completely crashing file data in FAT roll |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100454307C (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101409946A (en) * | 2008-11-28 | 2009-04-15 | 飞图科技（北京）有限公司 | Method capable of thoroughly deleting data of mobile phone memory card |
| CN102508855A (en) * | 2011-09-28 | 2012-06-20 | 北京安天电子设备有限公司 | Method and device for quickly clearing data in storage medium |
| CN103164656B (en) * | 2012-06-01 | 2015-12-16 | 北京安天电子设备有限公司 | Based on the method and system of visible mutation erasing hidden file |
| CN103164501A (en) * | 2012-07-04 | 2013-06-19 | 北京安天电子设备有限公司 | Method and system of rapid file erasure of anti-recovery software |
| CN102968597B (en) * | 2012-11-05 | 2015-06-24 | 中国电力科学研究院 | Disk data connection chain-based file crushing method |
| CN104394228A (en) * | 2014-12-08 | 2015-03-04 | 浪潮(北京)电子信息产业有限公司 | Storage method and device for file system |
| CN104699794B (en) * | 2015-03-18 | 2018-11-13 | 四川秘无痕信息安全技术有限责任公司 | A method of it thoroughly removes and has deleted jpg formatted files in FAT32 file system |
| CN105184197A (en) * | 2015-08-03 | 2015-12-23 | 四川效率源信息安全技术有限责任公司 | Method for completely erasing confidential data |
| CN106548093A (en) * | 2015-09-18 | 2017-03-29 | 四川效率源信息安全技术股份有限公司 | The method for deleting of confidential data in FAT32 file system |
| CN106598503B (en) * | 2016-12-23 | 2019-09-24 | 郑州云海信息技术有限公司 | The method and apparatus that optimization virtual disk occupies memory space under a kind of cloud platform |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6314437B1 (en) * | 1997-09-30 | 2001-11-06 | Infraworks Corporation | Method and apparatus for real-time secure file deletion |
| 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 |
| CN1773462A (en) * | 2005-10-17 | 2006-05-17 | 珠海金山软件股份有限公司 | Method for recovering deleted file of FAT32 partition |
-
2006
- 2006-09-19 CN CNB2006101222476A patent/CN100454307C/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6314437B1 (en) * | 1997-09-30 | 2001-11-06 | Infraworks Corporation | Method and apparatus for real-time secure file deletion |
| 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 |
| CN1773462A (en) * | 2005-10-17 | 2006-05-17 | 珠海金山软件股份有限公司 | Method for recovering deleted file of FAT32 partition |
Non-Patent Citations (2)
| Title |
|---|
| 文件删除的原理及应用. 朱蓉，郑建华.电脑学习，第1期. 2006 |
| 文件删除的原理及应用. 朱蓉，郑建华.电脑学习，第1期. 2006 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1928868A (en) | 2007-03-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100454307C (en) | Method for completely crashing file data in FAT roll | |
| JP5437557B2 (en) | Search processing method and search system | |
| US9176871B1 (en) | Garbage collection of chunks | |
| WO2011033734A1 (en) | File search system and program | |
| JP4802672B2 (en) | Electronic document management apparatus, electronic document management program, electronic document management system | |
| KR20150013191A (en) | File handling within a cloud-based file system | |
| CN103731483A (en) | Virtual file system based on cloud computing | |
| US20130204893A1 (en) | Methods for generating a unified virtual snapshot and systems thereof | |
| CN1289966A (en) | Transaction file system for updating elements in a plenty of files through transactions | |
| US20130080720A1 (en) | Information processing apparatus and method | |
| CN1928870A (en) | Method for completely crashing file data in NTFS roll | |
| JP4347264B2 (en) | Document management system | |
| CN104881466A (en) | Method and device for processing data fragments and deleting garbage files | |
| CN100423002C (en) | Method for deleting files in FAT roll | |
| CN105989013A (en) | Method and device for removing character watermarks | |
| JP2014178784A (en) | Information processing device, information processing system, and information processing program | |
| CN101377737B (en) | Resource management apparatus of application system | |
| CN102207898A (en) | Electronic data recovery method | |
| JP4640835B2 (en) | Information processing apparatus and program | |
| CN101990049A (en) | Data processing system and method of controlling the system | |
| CN102737082A (en) | Method and system for dynamically updating file data indexes | |
| CN102171696B (en) | The generation method and apparatus of customization data | |
| CN102346696A (en) | Method and device for recovering files | |
| JP2008027389A (en) | Document data transfer tracking system, document data transfer tracking method and document data transfer tracking program | |
| CN103942186A (en) | Method and system for managing documents |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Jinshan computer Building No. 8 Jingshan Hill Road, Lane 519015 Zhuhai Jida Lianshan Guangdong city of Zhuhai Province Patentee after: Zhuhai Kingsoft Software Co.,Ltd. Address before: Jinshan computer Building No. 8 Jingshan Hill Road, Lane 519015 Zhuhai Jida Lianshan Guangdong city of Zhuhai Province Patentee before: Zhuhai Kingsoft Software Co.,Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: KINGSOFT CORPORATION LIMITED Free format text: FORMER OWNER: ZHUHAI KINGSOFT SOFTWARE CO., LTD. Effective date: 20140902 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 519015 ZHUHAI, GUANGDONG PROVINCE TO: 100085 HAIDIAN, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140902 Address after: Kingsoft No. 33 building, 100085 Beijing city Haidian District Xiaoying Road Patentee after: BEIJING KINGSOFT INTERNET SECURITY SOFTWARE Co.,Ltd. Address before: Jinshan computer Building No. 8 Jingshan Hill Road, Lane 519015 Zhuhai Jida Lianshan Guangdong city of Zhuhai Province Patentee before: Zhuhai Kingsoft Software Co.,Ltd. |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20070314 Assignee: Zhuhai Kingsoft Software Co.,Ltd. Assignor: BEIJING KINGSOFT INTERNET SECURITY SOFTWARE Co.,Ltd. Contract record no.: 2014990000778 Denomination of invention: Method for completely crashing file data in FAT roll Granted publication date: 20090121 License type: Common License Record date: 20140926 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model |