CN1983425A - Method and device for hiding and displaying magnetic disk data - Google Patents
Method and device for hiding and displaying magnetic disk data Download PDFInfo
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- CN1983425A CN1983425A CN 200610162700 CN200610162700A CN1983425A CN 1983425 A CN1983425 A CN 1983425A CN 200610162700 CN200610162700 CN 200610162700 CN 200610162700 A CN200610162700 A CN 200610162700A CN 1983425 A CN1983425 A CN 1983425A
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Abstract
A method for hiding/displaying disc data includes selecting disc with data to be displayed, preparing hidden entrance point record file and Writing in recoded entrance point information in record file to entrance point of prepared entrance point record file, selecting out partial magnetic scales being not able to be restored with data from magnetic scales with data to be hidden and carrying out decoding, preparing catalogue and file to be hidden as per content of said record file and writing recorded entrance point information in said record file into entrance point of prepared catalogue and file.
Description
Technical field
The present invention relates to the method and the device thereof of a kind of hiding/demonstration data in magnetic disk.
Background technology
Disk is in the past hidden and is handled as shown in Figure 1.Utilize special software that specific USB flash memory is divided into two zones earlier, i.e. open (public) zone and safety (security) zone (step S11).Then, USB flash memory is connected to computing machine, utilizing special-purpose drive software is open (public) region representation a driver (step S12).The user utilizes special software to login (step S13).Check the password (step S14) of user's input, if incorrect then end process.If successfully login at step S13, then special-purpose drive software is shown as driver (step S15) to safety (Security) region list.Then, just can carry out file operation (step S16): if the user wants hiding data, then write data, when writing data data are carried out encryption to the safety zone to the safety zone; If the user will show the data of having hidden,, during sense data these data are decrypted processing then from the safety zone sense data.
Disk is in the past hidden treatment technology and had following shortcoming: hide in the processing at above-mentioned disk, can only handle at specific USB flash memory, usable range is narrower.In addition, not to the safety zone of USB flash memory the total data of latent subregion encrypt, therefore just can use recovery software to restore total data or data directory.And, can't can only visit open zone with commonsense method access security zone afterwards in case configure open zone and safety zone (promptly using fixing subregion), though therefore have many free areas can not use it in the safety zone, reduced the utilization rate of free area.
Summary of the invention
Based on the problems referred to above, the purpose of this invention is to provide and a kind ofly improve that free area utilization rate and concealment effect are more reliable hides/show the method for data in magnetic disk.
According to one object of the present invention, provide the method for hiding data in magnetic disk may further comprise the steps: to select data to be hidden; The entry point information for the treatment of hidden information is stored in the log file of entrance, and the entry point information that will treat hidden information is from its position deletion; From whole magnetic clumps at data place to be hidden, select a part of magnetic clump and encrypt; And the entry point information of this entrance log file is stored in the disk for the treatment of the hidden information place, and with the entry point information of entrance log file from its position deletion.
According to another object of the present invention, a kind of method that shows data in magnetic disk is provided, may further comprise the steps: the disk at the data place that selection will show; The entrance log file that making is hidden, and the entry point information that will preserve the entrance log file of having preserved is written in the entrance of the entrance log file of making; From whole magnetic clumps at data place to be hidden, select to restore a part of magnetic clump of its data and be decrypted; And the catalogue and the file that are hidden according to the content production of this entrance log file, and the entry point information of preserving in this entrance log file is written in the entrance of the catalogue made and file.
According to another purpose of the present invention, provide a kind of to hide/show the device of data in magnetic disk, comprising: treat latent data selection module, be used to select data to be hidden; Entrance log file administration module is used for setting up the entrance log file and will treats that the entry point information of hidden information is stored in this entrance log file, and the entry point information of this entrance log file is stored in the disk for the treatment of the hidden information place; Delete/restoration module fully the entrance, and the entry point information that is used for treating hidden information is from its position deletion/recovery, and with the entry point information of entrance log file from its position deletion/recovery; Encipherment is partly selected module, is used for selecting a part of magnetic clump from whole magnetic clumps at data place to be hidden, and the data encryption/decryption module, be used for selected portion magnetic clump and this entrance log file are carried out encrypt/decrypt.
Method and apparatus of the present invention can be to the data in the arbitrary region in nonspecific storage medium and hiding on-fixed zone, can improve the utilization rate of disk free area, and the information of using any recovery software all can not find to be hidden in any operating system (data directories such as total data or bibliographic structure, filename).
Description of drawings
Fig. 1 is the process flow diagram that existing disk is hidden disposal route;
Fig. 2 is the system's pie graph that shows the method that is applicable to hiding data in magnetic disk of the present invention;
Fig. 3 is the synoptic diagram of data save mode of the file system of explanation disk;
Fig. 4 is the process flow diagram of method that shows the hiding data in magnetic disk of embodiments of the invention;
Fig. 5 is the process flow diagram of method that shows the demonstration data in magnetic disk of embodiments of the invention; And
Fig. 6 be show embodiments of the invention hide/show the block scheme of the device of data in magnetic disk.
Embodiment
Describe the specific embodiment of the present invention in detail below in conjunction with accompanying drawing.
Fig. 2 is the example that utilizes the computer system composition diagram of data in magnetic disk hidden method of the present invention.
This computer system comprises the main frame (22) that internal memory (not shown) and floppy disk (21) etc. are housed, and is used to key in the keyboard (23) of data, the display (24) of demonstration output data and external hard disk driver (25) etc.Wherein, floppy disk can drive floppy disk (26), and USB flash memory (27) is the removable storage medium that can be connected with computing machine.
Fig. 3 explanation is to the data save mode of the file system of disk.Disk comprises floppy disk, hard disk and USB flash memory etc.Disk is the unit management data with the magnetic clump, and file or catalogue are gathered together by magnetic and constituted.When data were stored in disk, spanned file or directory entry point at first was promptly shown in solid box among the figure.Carry out data then and preserve, for example, capacity is the file of 1M bit (i.e. 1024 bits) when being kept at each magnetic clump size and being the disk of 512 bits, then needs to utilize 2048 empty magnetic clumps.First magnetic clump numbering is registered to the document entry point.Next step, 2048 magnetic clumps are reflected to the FAT table, shown in frame of broken lines among this figure.When reading the file of above preservation, at first in directory entry point, obtain first magnetic clump.Next step utilizes the FAT table, obtains magnetic clump tabulation (Cluster List), thereby obtains relevant magnetic clump, realizes reading of data.
Because data hidden of the present invention and display packing are hidden by the change file system structure and are shown, therefore only relevant with file system, be the storer of any storage medium of FAT paper series system or similar file system applicable to file system.
Fig. 4 is the process flow diagram of method that shows the hiding data in magnetic disk of embodiments of the invention.In the present embodiment, be hidden object with the data in the USB flash memory.
At first, in order to hide the data among the USB flash memory USBM, the user selects USB flash memory (step S401).
Whether then, require the user to input password, be validated user (step S402) to verify this user.
Whether the password of judging user input correct (step S403), if the incorrect processing procedure that then finishes to hide data in magnetic disk.
If password is correct, then in the middle of the root directory of USB flash memory USBM, select to treat cryptostomata record (step S404).
Create a file, selecteed catalogue with and the All Files of the inside and the entry point information of catalogue all be stored in (step S405) in this document.This document can be described as the entrance log file, is exclusively used in the entry point information of preserving file or catalogue.
The entry point information of file or catalogue is a kind of name information of file or file (being catalogue), a magnetic clump of its log file name (long filenames or MS-DOS short filename), extension name, file size, modification date, file etc.The All Files of the positive lower floor of root directory and file, its entry point information all is stored in the field of root directory.And file under the sub-directory and file, its entry point information is stored in data field itself.
After in the log file of entrance, keeping entry point information, those entry point information are deleted fully from position separately, thus hide selecteed catalogue with and the All Files and the catalogue (step S406) of the inside.
Then, catalogue and the shared magnetic clump position of file in the middle of the cryptostomata record treated in search, the magnetic clump (step S407) that selection will restored data.
Utilize the high spped coding algorithm that the magnetic clump of selecting in step S47 is encrypted (step S408) with the combinational code of the password generation of serial number and user's input.Wherein, serial number is the unique number at new user's generation of the method for using this hiding data in magnetic disk.
After data magnetic clump that can not restored data encrypted, be the entrance log file that password is encrypted (step S409) also with the password of serial number and user's input.
After correctly carrying out the encryption of entrance log file, the entrance log file of encrypting is replicated in USB flash memory USBM (step S410).
The entry point information of this entrance log file that duplicates correctly is kept at the specific part (step S411) of USBM.
The entry point information Delete All of this entrance log file that duplicates is fallen to hide entrance log file (step S412), finish to hide the processing procedure of data in magnetic disk.
The method of above-mentioned hiding data in magnetic disk is not provided with fixing subzone hiding data, can improve the utilization rate of free area; Because having used the user is unique serial number and password, when wanting to show the data for the treatment of latent disk, if do not know serial number or user cipher, use data recovery software also can't recover, therefore can in disk, preserve and the cuff vital document relievedly.
Fig. 5 is the process flow diagram of method that shows the demonstration data in magnetic disk of embodiments of the invention.In the present embodiment, be display object with the data of hiding in the USB flash memory.Present embodiment is an inverse process embodiment illustrated in fig. 4.
At first, in order to show the data that have been hidden of USB flash memory USBM, the user selects USB flash memory (step S501).
Whether then, require the user to input password, be validated user (step S502) to verify this user.
Whether the password of judging user input correct (step S503), if the incorrect processing procedure that then finishes to show data in magnetic disk.
If password is correct, then make entrance log file (step S504) in the mode of in USB flash memory, making empty entrance log file, if can not make the entrance log file, then finish to show the processing of data in magnetic disk because of the blank capacity of USB flash memory USBM is little.
The entry point information of the original entrance log file of preserving in the USB flash memory USBM (entry point information of the entrance log file before hiding) thus be written to the entrance log file (step S505) that in the middle of the entrance of the entrance log file that step S504 makes, shows this encryption.
The combinational code that the password that the shown encryption entrance log file of step S505 is imported with serial number and user generates is decrypted (step S506).
Utilize the catalogue that the log file search of decrypted entrance is hidden and that part of magnetic clump that can not restore its data of file place disk, and be decrypted (step S507) with the combinational code of serial number and user cipher generation.
The catalogue and the file (step S508) that are hidden according to decrypted entrance log file content production.If what be hidden is catalogue, then make empty list; If what be hidden is file, then only need to make the empty file of no content.If can not make entrance log file, then end process because of the blank capacity of USB flash memory USBM is little.
Original entry point information in the log file of entrance (file before hiding or the entry point information of catalogue) is written in the middle of the entrance of the empty file made or catalogue, thereby shows catalogue that is hidden and the file of encrypting (step S509).
The shown encrypted file of step S508 or catalogue are decrypted (step S510), end process then with the combinational code that the password of serial number and user's input generates.
Though the external memory of hiding/video data of mentioning in the middle of the foregoing description is a USB flash memory, should invent undoubtedly also applicable to built-in storage mediums such as floppy disk and hard disks, perhaps other external storage mediums such as hard disk of USB interface.
Fig. 6 be show the third embodiment of the present invention hide/show the block scheme of the device of data in magnetic disk.
With reference to figure 6, this device comprises: serial number generation module 61, user cipher and serial number are confirmed module 62, treat latent data selection module 63, entrance log file administration module 64, delete/restoration module 65 fully the entrance, and encipherment is partly selected module 66, and data encryption/decryption module 67.
For the new buyer of this device (corresponding to software), serial number generation module 61 generates at the buyer and is unique serial number and is stored.
Whether user cipher and serial number confirm that module 62 requires the user to input password and serial number, be validated user to verify this user, and judge whether the password of user's input is correct.
Treat that latent data selection module 63 is used for selecting to treat cryptostomata record or file in the middle of the root directory of USB flash memory USBM.
If treat that cryptostomata record or file are selected, so entrance log file administration module 64 create a file and selecteed catalogue with and the All Files of the inside and the entry point information of catalogue all be stored in this document.This document can be described as the entrance log file, is exclusively used in the preservation entry point information.
Under the situation of hiding data in magnetic disk, the entrance deletes fully/and restoration module 65 is after being stored in entry point information in the log file of entrance, those entry point information are deleted fully from position separately, thus hide selecteed catalogue with and the All Files and the catalogue of the inside.
Encipherment partly selects module 66 search to treat catalogue and the shared magnetic clump position of file in the middle of the cryptostomata record, the magnetic clump that selection will restored data.
It is the magnetic clump of selecting that combinational code is encrypted with the password that serial number and user import that data encryption/decryption module 67 is utilized the high spped coding algorithm.After data magnetic clump encrypted, data encryption/decryption module 67 was the entrance log file that combinational code is encrypted with the password of serial number and user's input also again.
After correctly carrying out the encryption of entrance log file, the entrance deletes fully/and restoration module 65 is replicated in the entrance log files of encrypting among the USB flash memory USBM, and the entry point information of this entrance log file is stored in the specific part of USBM.Then, the entrance delete fully/restoration module 65 falls the entry point information Delete All of entrance log file to hide the entrance log file.
Under the situation that shows the data in magnetic disk of having hidden, the entrance deletes fully/and restoration module 65 makes blank entrance log file in the mode of making empty entrance log file in USB flash memory, if can not make the entrance log file, then finish to show the processing of data in magnetic disk because of the blank capacity of USB flash memory USBM is little.Then, the entrance deletes fully/and restoration module 65 is written to the entry point information of the original entrance log file of preserving in the USB flash memory USBM (entry point information of the entrance file before hiding) in the middle of the entrance of the blank entrance log file of making, thus show the entrance log file of this encryption.
Data encryption/decryption module 67 is decrypted the combinational code of the entrance log file of the encryption that shows with the password generation of serial number and user's input.
The entrance deletes fully/file and catalogue that restoration module 65 is hidden according to the content production of the entrance log file of deciphering again.If what be hidden is catalogue, what then make is empty list; If what be hidden is file, then only need to make the empty file of no content.If can not make blank entrance log file, then end process because of the blank capacity of USB flash memory USBM is little.Then, the entrance deletes fully/and restoration module 65 is written to the original entry point information in the log file of entrance (watt that machine before hiding or the entry point information of catalogue) in the middle of the null file entrance of making or directory entry point, thus show the file that is hidden and the catalogue of encryption.
Data encryption/decryption module 67 is decrypted the encrypted file that shows and catalogue again with the combinational code that the password of serial number and user's input generates.
The present invention describes in detail in conjunction with above-mentioned exemplary embodiments, various selections, modification, variation, improvement and/or basic equivalent technologies, and known or possible content is known those of ordinary skill in the art at present.Therefore, above-mentioned exemplary embodiments of the present invention is not lying in restriction the present invention with illustrating.Can make multiple change not breaking away within the spirit and scope of the present invention.Therefore, the present invention can comprise all selection, modification, variation, improvement and/or basic equivalent technologies known or development later on.
Claims (21)
1. the method for a hiding data in magnetic disk is characterized in that, said method comprising the steps of:
A. select data to be hidden;
B. the entry point information that will treat hidden information is stored in the log file of entrance, and the entry point information that will treat hidden information is from its position deletion;
C. from whole magnetic clumps at data place to be hidden, select a part of magnetic clump and encrypt; And
D. the entry point information with described entrance log file is stored in the disk for the treatment of the hidden information place, and the entry point information of entrance log file is deleted from its position.
2. the method for claim 1 is characterized in that, uses deletion mode fully to delete described entry point information among step b and the d.
3. method as claimed in claim 2 is characterized in that, a part of magnetic clump of selecting among the step c is that part of magnetic clump that can't restore its data.
4. method as claimed in claim 3 is characterized in that, uses the combinational code of the password generation of being set by serial number and user that selected magnetic clump is encrypted among the step c.
5. method as claimed in claim 4 is characterized in that, described serial number is the unique number that generates at new user.
6. method as claimed in claim 5 is characterized in that, the user carries out data and hides before the processing, confirms with described combinational code whether the licensed data of carrying out is hidden processing to described user earlier.
7. method as claimed in claim 6 is characterized in that, the entry point information of described entrance log file is stored in before the disk for the treatment of the hidden information place, with described combinational code described entrance log file is encrypted earlier.
8. method as claimed in claim 7 is characterized in that, can carry out disposable hiding processing to any several drivers of disk.
9. as each described method of claim 1-8, it is characterized in that described disk is the flash memory of USB interface.
10. as each described method of claim 1-8, it is characterized in that described disk is the hard disk of USB interface.
11., it is characterized in that described disk is a floppy disk as each described method of claim 1-8.
12., it is characterized in that described disk is an internal hard disk as each described method of claim 1-8.
13. a method that shows data in magnetic disk is characterized in that, said method comprising the steps of:
A. select the disk at the data place that will show;
B. make the entrance log file be hidden, and the entry point information that will preserve the entrance log file of having preserved is written in the entrance of the entrance log file of making;
C. from whole magnetic clumps at data place to be hidden, select to restore a part of magnetic clump of its data and be decrypted; And
D. catalogue and the file that is hidden according to the content production of described entrance log file, and the entry point information of preserving in the log file of described entrance is written in the entrance of the catalogue made and file.
14. method as claimed in claim 13 is characterized in that, uses the combinational code of the password generation of being set by serial number and user that selected magnetic clump is decrypted among the step c.
15. method as claimed in claim 14 is characterized in that, described serial number is the unique number that generates at new user.
16. method as claimed in claim 15 is characterized in that, the user carries out before the data display process, earlier confirms the whether licensed data display process of carrying out of described user with described combinational code.
17. method as claimed in claim 16 is characterized in that, the entry point information of the log file of entrance described in the step b is decrypted described entrance log file with described combinational code after being written in the entrance of the catalogue made and file.
18. the device of hiding/demonstration data in magnetic disk is characterized in that described device comprises;
Treat latent data selection module, be used to select data to be hidden;
Entrance log file administration module, be used for setting up the entrance log file and will treat that the entry point information of hidden information is stored in described entrance log file, and the entry point information of described entrance log file is stored in the disk for the treatment of the hidden information place;
Delete/restoration module fully the entrance, and the entry point information that is used for treating hidden information is from its position deletion/recovery, and with the entry point information of entrance log file from its position deletion/recovery;
Encipherment is partly selected module, is used for selecting a part of magnetic clump from whole magnetic clumps at data place to be hidden, and
The data encryption/decryption module is used for selected portion magnetic clump and described entrance log file are carried out encrypt/decrypt.
19. device as claimed in claim 18 is characterized in that, described device also comprises:
Series number generation module is used for the unique serial number that generates at new user.
20. device as claimed in claim 19 is characterized in that, described device also comprises:
User cipher and serial number are confirmed module, and before hiding/display process that the user carries out data, the combinational code that generates with described serial number and user cipher confirms described user whether hide/display process by the licensed data of carrying out earlier.
21. method as claimed in claim 20 is characterized in that, described data encryption/decryption module is carried out encrypt/decrypt with described combinational code to selected portion magnetic clump and described entrance log file.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610162700 CN1983425A (en) | 2005-12-02 | 2006-12-01 | Method and device for hiding and displaying magnetic disk data |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200510022810.8 | 2005-12-02 | ||
| CN200510022810 | 2005-12-02 | ||
| CN 200610162700 CN1983425A (en) | 2005-12-02 | 2006-12-01 | Method and device for hiding and displaying magnetic disk data |
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| Publication Number | Publication Date |
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| CN1983425A true CN1983425A (en) | 2007-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200610162700 Pending CN1983425A (en) | 2005-12-02 | 2006-12-01 | Method and device for hiding and displaying magnetic disk data |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908361A (en) * | 2010-09-14 | 2010-12-08 | 杭州电子科技大学 | Method for hiding private information of U disk |
| CN110045932A (en) * | 2017-12-19 | 2019-07-23 | 佳能株式会社 | Information processing unit, information processing method and storage medium |
-
2006
- 2006-12-01 CN CN 200610162700 patent/CN1983425A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101908361A (en) * | 2010-09-14 | 2010-12-08 | 杭州电子科技大学 | Method for hiding private information of U disk |
| CN101908361B (en) * | 2010-09-14 | 2012-05-23 | 杭州电子科技大学 | Method for hiding private information of U disk |
| CN110045932A (en) * | 2017-12-19 | 2019-07-23 | 佳能株式会社 | Information processing unit, information processing method and storage medium |
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