CN102054143A - Read-only protection method for removable storage media - Google Patents
Read-only protection method for removable storage media Download PDFInfo
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- CN102054143A CN102054143A CN2009102074085A CN200910207408A CN102054143A CN 102054143 A CN102054143 A CN 102054143A CN 2009102074085 A CN2009102074085 A CN 2009102074085A CN 200910207408 A CN200910207408 A CN 200910207408A CN 102054143 A CN102054143 A CN 102054143A
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Abstract
The invention relates to a read-only protection method for a removable storage media. In the method, a write inhibition data table storing the names of files inhibited from being written with the removable storage media is firstly established, when the removable storage media intends to exchange data with a storage device possibly attacked by a virus, files possible to give rise to the virus attack to the removable storage media can be effectively inhibited from being written in the removable storage media, and other files an be written normally, accordingly, not only can the probability on the virus attack to the removable storage media be lowered, but also data required by a user can be written in the removable storage media, therefore, the inconvenience caused by use inhibition due to the probability on virus attack cannot be resulted.
Description
Technical field
The present invention is about a kind of read-only guard method of removable formula Storage Media.
Background technology
In recent years, along with popularizing of removable formula Storage Medias such as the carry-on dish of USB, carry-on hard disk, make the distribution of the carry-on dish virus of USB serious day by day.
The carry-on dish virus of USB mainly is to utilize the autorun.inf file with in the computer that virus is implanted with the removable formula Storage Media of having poisoned is connected, the built-in Storage Media of this computer is infected, by the computer that is infected virus being spread to each again infects in the removable formula Storage Media that computer was connected with this round, therefore, the carry-on dish virus of USB aleopation and constantly diffusion between computer and removable formula Storage Media.
For preventing the continuation diffusion of the carry-on dish virus of USB, the carry-on dish of a kind of prior USB is for further being provided with a read-only switch thereon, switching read-only switch by the user makes the carry-on dish of this USB start read-only function, behind read-only function on, any data all can't write in the carry-on dish of this USB, suffer infective virus when being connected with the computer that infects the carry-on dish virus of USB so can prevent the carry-on dish of USB.
Yet, when read-only function on, though can allow the file that contains virus can't write outside the carry-on dish of this USB, generic-document also can't write the carry-on dish of this USB thus, and the user also can't delete the file in the carry-on dish of USB according to need, causes the user inconvenient greatly.
Summary of the invention
The objective of the invention is to, solve in the prior art,, use inconvenient technical matters by the continuation diffusion that the system switch prevents the carry-on dish virus of USB is set.
For achieving the above object, the invention provides a kind of read-only guard method of removable formula Storage Media, comprise the following steps:
Set up one and forbid writing tables of data, this forbids writing tables of data for storing the file name of forbidding writing a removable formula Storage Media;
Reception is to the write command of removable formula Storage Media, and this write command also comprises the file name of desiring to write removable formula Storage Media;
Judge whether to allow data are write removable formula Storage Media, the file name of desiring to write removable formula Storage Media for comparison forbids writing that tables of data is stored forbids writing file name and whether conform to this;
Tables of data is stored forbids writing file name and do not conform to if the file name of desiring to write removable formula Storage Media forbids writing with this, then allow this write command that data are write removable formula Storage Media, otherwise then do not allow this write command that data are write removable formula Storage Media.
Beneficial effect of the present invention is; utilize above-mentioned technological means, a kind of read-only guard method of removable formula Storage Media is provided, it can still can write under the prerequisite of data removable formula Storage Media; prevent that some specific file from writing in the removable formula Storage Media, with the virus of avoiding infection.Owing to only forbid existing the file name of forbidding writing in the tables of data to write removable formula storage device, therefore this file of forbidding writing file name in the tables of data of non-genus all can normally write removable formula storage device, thus, not only can prevent removable formula Storage Media infective virus, and still can write the required data of user, allow the user not have the restriction that can't write data fully in the use removable formula Storage Media.
Description of drawings
Fig. 1 is the application function calcspar of a preferred embodiment of the present invention.
Fig. 2 is the process flow diagram of a preferred embodiment of the present invention.
Description of reference numerals:
The carry-on dish of 10-USB; The 20-computer.
Embodiment
The read-only guard method of the removable formula Storage Media of the present invention, in order to make one to be connected with computer or the removable formula Storage Media of line has only read-protected function, this removable formula Storage Media can be the storage device of a USB interface, the for example carry-on dish of USB, the carry-on hard disk of USB etc., or other any removable formula Storage Medias that may kenels; Method of the present invention again may be implemented in this to be desired to have on the removable formula Storage Media of a read protecting function, or is implemented on the computer of this removable formula Storage Media desire connection or line.As shown in Figure 1, be implemented on the carry-on dish 10 of a USB as an example with method of the present invention below.
See also shown in Figure 2ly, the first embodiment of the present invention comprises the following steps:
Set up one and forbid writing tables of data 200;
Set up one and forbid deleted data table 201;
Set up a virus behavior tables of data 202;
Check whether the computer that is connected with removable formula Storage Media has potential virus danger 203;
If the computer 20 no potential virus danger that are connected with removable formula Storage Media then allow the read-write 204 to removable formula Storage Media fully, otherwise then proceed the following step;
Reception is to the write command 205 of removable formula Storage Media;
If the write command desire writes removable formula Storage Media with data, then further judge whether to allow data are write removable formula Storage Media 206, if be judged as is then to allow data are write removable formula Storage Media 207, otherwise then do not allow data are write removable formula Storage Media 208;
If the write command desire is deleted data in the removable formula Storage Media, then further judge whether to allow to delete the data 209 of removable formula Storage Media, if be judged as be, then allow the data 210 of the removable formula Storage Media of deletion), on the contrary the data 211 that then do not allow to delete removable formula Storage Media.
Set up one and forbid writing in tables of data 200 steps above-mentioned, this is forbidden writing tables of data and forbids writing file name for storing, this is forbidden writing file name and can be the file full name that comprises main file name (base name) and secondary shelves names (extension), or only is secondary shelves name; Because mostly most of viruses are the secondary shelves name of .exe .com .pif .lnk, thus in present embodiment, with secondary shelves as forbidding that writing file name illustrates.
Set up one and forbid in deleted data table 201 step above-mentioned, this forbids that the deleted data table is to store to forbid the deleted data title, this forbids that the deleted data name is called file full name, secondary shelves name or directory path, for example: some virus may be deleted the file of all secondary shelves .exe by name in the carry-on dish 10 of USB, may be secondary shelves name so forbid the deleted data title; Or should do not deleted arbitrarily when having deposited significant data in certain important catalogue of the carry-on dish 10 of this USB the time, suffer the virus deletion for avoiding this important catalogue, may be the path of this important catalogue so forbid the deleted data title.
Set up in a virus behavior tables of data 202 steps above-mentioned, this virus behavior tables of data is for storing the virus behavior data, and it is put down in writing when computer 20 infective virus, sets condition code and the deposit position thereof that shelves may exist in computer 20 operating systems; Form (Windows) operating system and Virus.Win32.AutoRun.ah virus with Microsoft are example; the logfile of windows workspace system (Registry) is aforesaid setting shelves; and should virus can automatically perform after the windows workspace system starts shooting again for guaranteeing; usually can logfile [HKLM SOFTWARE Microsoft Windows CurrentVersion RunOnce] increase in order to start the machine sign indicating number of virus shelves in the field; so this is a condition code in order to the machine sign indicating number that starts virus shelves, and [HKLM SOFTWARE Microsoft Windows CurrentVersion RunOnce] be deposit position.
Whether have in dangerous 203 steps of potential virus at the computer that above-mentioned inspection is connected with removable formula Storage Media, its test mode one of can comprise what follows or wherein the two or three or all be equipped with wherein, but be not limited to following manner, in present embodiment, following manner comprises for carrying out in regular turn:
1. check whether wire net of computer: because computer 20 is if fail wire net, then no matter expression is that the renewal of computer 20 operating systems or the renewal of antivirus software, startup etc. all can't normal operations, so whether normally the present invention promptly is by checking the computer 20 be connected with removable formula Storage Media wire net, as judging whether this computer 20 has the foundation of potential virus danger, if computer 20 is wire net normally, represent no potential virus danger, otherwise potential virus danger is then arranged.As for checking the whether mode of wire net of computer 20, one preferable way is to utilize computer 20 operating systems to offer program compilation person to write application code interface (the Application Programming Interface that program reading operation system state is used, be called for short API), read check computer 20 whether the data field of wire net confirmed.
2. check whether computer operating system is updated to last state: because the more new data of its operating system promptly can be disengaged at set intervals in computer 20 operating system manufacturers, security breaches with the repairing work system, with the windows workspace system is example, The built-in has automatically updating function, can be at any time and the servomechanism line of Microsoft, acquisition is also upgraded up-to-date more new data, so the present invention promptly is by checking that the windows workspace system provides the data field of relevant operating system update mode, as judging whether the computer 20 that is connected with removable formula Storage Media has the foundation of potential virus danger, if operating system has been updated to last state, represent no potential virus danger, otherwise potential virus danger is then arranged.As for checking whether computer 20 operating systems are updated to the mode of last state, one preferable way is to utilize computer 20 operating systems to offer program compilation person to write the API that program reading operation system state is used, and reads and checks that the data field whether computer 20 operating systems are updated to last state is confirmed.
3. whether the antivirus software of checking computer starts: the present invention can be by checking that the windows workspace system provides the data field that closes gas defence software startup state, as judging whether the computer 20 that is connected with removable formula Storage Media has the foundation of potential virus danger, if antivirus software starts, represent no potential virus danger, otherwise potential virus danger is then arranged.As for the mode of checking whether computer 20 antivirus softwares start, one preferable way is to utilize computer 20 operating systems to offer program compilation person to write the API that program reading operation system state is used, and reads and checks that the data field whether computer 20 antivirus softwares start is confirmed.
4. whether logfile contains virus signature in the inspection computer operating system: when the present invention proceeds to computer 20 that this inspection is connected with removable formula Storage Media whether dangerous 202 steps of potential virus are arranged, system is according to the stored virus behavior data of this virus behavior database, and seek in the setting shelves of computer 20 operating systems that arrive whether the project that meets the virus behavior data is arranged, expression has potential virus danger if having then, otherwise does not then have potential virus danger.Set the mode whether shelves contain virus signature in computer 20 operating systems as for checking, can utilize computer 20 operating systems to offer program compilation person and write the API that program reading operation system state is used, read in computer 20 operating systems data field of setting shelves and confirmed, or directly open the setting shelves of operating system and directly therefrom check and confirm.
In write command 205 steps of above-mentioned reception to removable formula Storage Media, this write command comprises that desire writes the write command of removable formula Storage Media or the write command that desire is deleted data in the removable formula Storage Media with data, if desire writes data the write command of removable formula Storage Media, then wherein still comprise the file name of desiring to write removable formula Storage Media, in the actual state, the file name of desiring to write removable formula Storage Media is file full name normally, and this document full name has promptly comprised main file name and secondary shelves name; If desire is deleted the write command of data in the removable formula Storage Media, then wherein still comprise and desire the deleted data title, may be file full name, secondary shelves name or directory path.
Allow data are write in removable formula Storage Media 206 steps above-mentioned judging whether, the file name that comparison desires to write removable formula Storage Media forbids writing that tables of data is stored forbids writing file name and whether conform to this; In present embodiment, comparison desires to write the secondary shelves name of file full name of removable formula Storage Media in the write command, whether the stored secondary shelves name that writes removable formula Storage Media of forbidding conforms in the tables of data with forbidding writing, if do not conform to, then carry out this write command of above-mentioned permission data are write removable formula Storage Media 207 steps, otherwise then carry out above-mentionedly not allowing this write command that data are write removable formula Storage Media 208 steps.
Allow to delete in data 209 steps of removable formula Storage Media above-mentioned judging whether, the data name of comparison desire deletion forbids with this whether the stored deleted data title of forbidding of deleted data table conforms to, if conform to, then carry out above-mentioned data 211 steps that do not allow to delete removable formula Storage Media, and must not delete the data that meet this deleted data title in this removable formula Storage Media, otherwise then carry out data 210 steps that removable formula Storage Media is deleted in above-mentioned permission, to delete the data that meet this deleted data title in this removable formula Storage Media.
From the above, use the removable formula Storage Media (for example carry-on dish of USB) of method of the present invention can be when it connects a computer 20, if this computer 20 has potential virus danger, then only allow do not forbidding that writing the listed file that writes file name of forbidding of tables of data writes removable formula Storage Media, or only allow do not forbidding the listed data of forbidding the deleted data title of deleted data table in this removable formula Storage Media of deletion, thus, the user still can forbid writing the listed file that writes file name of forbidding of tables of data and writes removable formula Storage Media being different from, or deletes to be different from this removable formula Storage Media and forbid the listed data of forbidding the deleted data title of deleted data table; If method of the present invention is applied on the computer 20, then it can prevent from its virus that has infected is write in the removable formula Storage Media that computer 20 connects therewith, but still keep to such an extent that will be different from and forbid writing the ability that the listed file of forbidding writing file name of tables of data writes removable formula Storage Media, or can prevent to delete data in the removable formula Storage Media that computer therewith 20 connects, but still keep to such an extent that be different from the listed ability of forbidding the data of deleted data title of deleted data table of forbidding in this removable formula Storage Media of deletion.Be with, method of the present invention can be avoided removable formula Storage Media infective virus or lost data effectively still writing under the prerequisite of data removable formula Storage Media.
The above description of this invention is illustrative, and nonrestrictive, and those skilled in the art is understood, and can carry out many modifications, variation or equivalence to it within spirit that claim limits and scope, but they will fall within the scope of protection of the present invention all.
Claims (29)
1. the read-only guard method of a removable formula Storage Media is characterized in that, comprises the following steps:
Set up one and forbid writing tables of data, this forbids writing tables of data for storing the file name of forbidding writing a removable formula Storage Media;
Reception is to the write command of removable formula Storage Media, and this write command also comprises the file name of desiring to write removable formula Storage Media;
Judge whether to allow data are write removable formula Storage Media, the file name of desiring to write removable formula Storage Media for comparison forbids writing that tables of data is stored forbids writing file name and whether conform to this;
Tables of data is stored forbids writing file name and do not conform to if the file name of desiring to write removable formula Storage Media forbids writing with this, then allow this write command that data are write removable formula Storage Media, otherwise then do not allow this write command that data are write removable formula Storage Media.
2. the read-only guard method of removable according to claim 1 formula Storage Media is characterized in that, in set up one forbid writing tables of data after, further carry out the following step earlier:
Check whether the computer that is connected with removable formula Storage Media has potential virus danger;
If the computer that is connected with removable formula Storage Media does not have potential virus danger, then allow read-write fully to removable formula Storage Media, otherwise just receive write command, and judge whether to allow data are write removable formula Storage Media removable formula Storage Media.
3. as the read-only guard method of removable formula Storage Media as described in the claim 2; it is characterized in that; with the computer that is connected with removable formula Storage Media normal wire net whether; as judging whether this computer has the foundation of occult virus danger; if computer is wire net normally; represent no potential virus danger, otherwise potential virus danger is then arranged.
4. as the read-only guard method of removable formula Storage Media as described in the claim 2; it is characterized in that; whether the operating system with the computer that is connected with removable formula Storage Media is updated to last state; the foundation whether potential virus danger is arranged as this computer; if operating system has been updated to last state; represent no potential virus danger, otherwise potential virus danger is then arranged.
5. as the read-only guard method of removable formula Storage Media as described in the claim 3; it is characterized in that; further whether the operating system with the computer that is connected with removable formula Storage Media is updated to last state; the foundation whether potential virus danger is arranged as this computer; if operating system has been updated to last state; represent no potential virus danger, otherwise potential virus danger is then arranged.
6. as the read-only guard method of removable formula Storage Media as described in the claim 2; it is characterized in that; with with computer that removable formula Storage Media is connected on antivirus software whether start; as checking whether this computer has the foundation of potential virus danger; if antivirus software starts; represent no potential virus danger, otherwise potential virus danger is then arranged.
7. as the read-only guard method of removable formula Storage Media as described in the claim 3; it is characterized in that; further with computer that removable formula Storage Media is connected on antivirus software whether start; as checking whether the computer that is connected with removable formula Storage Media has the foundation of potential virus danger; if antivirus software starts; represent no potential virus danger, otherwise potential virus danger is then arranged.
8. as the read-only guard method of removable formula Storage Media as described in the claim 4; it is characterized in that; further with computer that removable formula Storage Media is connected on antivirus software whether start; as checking whether the computer that is connected with removable formula Storage Media has the foundation of potential virus danger; if antivirus software starts; represent no potential virus danger, otherwise potential virus danger is then arranged.
9. as the read-only guard method of removable formula Storage Media as described in the claim 2, it is characterized in that, further set up a virus behavior tables of data, wherein:
This virus behavior tables of data is for storing the virus behavior data, and it is put down in writing when the computer infective virus, sets condition code and the deposit position thereof that shelves may exist in computer operating system;
When checking whether the computer that is connected with removable formula Storage Media has potential virus dangerous, whether the project that meets the virus behavior data is arranged as foundation in the setting shelves with this computer operating system, expression has potential virus danger if having then, otherwise does not then have potential virus danger.
10. as the read-only guard method of removable formula Storage Media as described in the claim 3, it is characterized in that, further set up a virus behavior tables of data, wherein:
This virus behavior tables of data is for storing the virus behavior data, and it is put down in writing when the computer infective virus, sets condition code and the deposit position thereof that shelves may exist in computer operating system;
When checking whether the computer that is connected with removable formula Storage Media has potential virus dangerous, further whether the project that meets the virus behavior data is arranged as foundation in the setting shelves with this computer operating system, expression has potential virus danger if having then, otherwise does not then have potential virus danger.
11. the read-only guard method as removable formula Storage Media as described in the claim 4 is characterized in that, further sets up a virus behavior tables of data, wherein:
This virus behavior tables of data is for storing the virus behavior data, and it is put down in writing when the computer infective virus, sets condition code and the deposit position thereof that shelves may exist in computer operating system;
When checking whether the computer that is connected with removable formula Storage Media has potential virus dangerous, further whether the project that meets the virus behavior data is arranged as foundation in the setting shelves with this computer operating system, expression has potential virus danger if having then, otherwise does not then have potential virus danger.
12. the read-only guard method as removable formula Storage Media as described in the claim 5 is characterized in that, further sets up a virus behavior tables of data, wherein:
This virus behavior tables of data is for storing the virus behavior data, and it is put down in writing when the computer infective virus, sets condition code and the deposit position thereof that shelves may exist in computer operating system;
When checking whether the computer that is connected with removable formula Storage Media has potential virus dangerous, further whether the project that meets the virus behavior data is arranged as foundation in the setting shelves with this computer operating system, expression has potential virus danger if having then, otherwise does not then have potential virus danger.
13. as the read-only guard method of removable formula Storage Media as described in each in the claim 2 to 12; it is characterized in that; see through the application code interface that computer operating system provides, read and check whether the computer that is connected with removable formula Storage Media has the dangerous desired data of potential virus.
14. as the read-only guard method of removable formula Storage Media as described in each in the claim 9 to 12; it is characterized in that check therefrom directly by the setting shelves of directly opening operating system in the setting shelves of computer operating system whether the project that meets the virus behavior data is arranged.
15., it is characterized in that this forbids writing file full name that file name comprises main file name and secondary shelves name as the read-only guard method of removable formula Storage Media as described in each in the claim 1 to 12.
16. the read-only guard method as removable formula Storage Media as described in the claim 13 is characterized in that, this forbids writing file full name that file name comprises main file name and secondary shelves name.
17. the read-only guard method as removable formula Storage Media as described in the claim 14 is characterized in that, this forbids writing file full name that file name comprises main file name and secondary shelves name.
18., it is characterized in that this is forbidden writing file name and is secondary shelves name as the read-only guard method of removable formula Storage Media as described in each in the claim 1 to 12.
19. the read-only guard method as removable formula Storage Media as described in the claim 13 is characterized in that, this is forbidden writing file name and is secondary shelves name.
20. the read-only guard method as removable formula Storage Media as described in the claim 14 is characterized in that, this is forbidden writing file name and is secondary shelves name.
21. as the read-only guard method of removable formula Storage Media as described in each in the claim 1 to 12; it is characterized in that; further set up one and forbid the deleted data table; this forbids that the deleted data table is to store to forbid the deleted data title; this write command also further comprises desire deleted data title again; and after the write command that receives removable formula Storage Media, further comprise the following steps:
Judge whether to allow to delete the data of removable formula Storage Media, for the data name of comparison desire deletion forbids with this whether the stored deleted data title of forbidding of deleted data table conforms to;
If the deleted data title forbids that with this stored deleted data title of forbidding of deleted data table does not conform to, then allow to meet the data of this deleted data title in this removable formula Storage Media of deletion, otherwise then do not allow to delete the data that meet this deleted data title in this removable formula Storage Media.
22. read-only guard method as removable formula Storage Media as described in the claim 13; it is characterized in that; further set up one and forbid the deleted data table; this forbids that the deleted data table is to store to forbid the deleted data title; this write command also further comprises desire deleted data title again; and after the write command that receives removable formula Storage Media, further comprise the following steps:
Judge whether to allow to delete the data of removable formula Storage Media, for the data name of comparison desire deletion forbids with this whether the stored deleted data title of forbidding of deleted data table conforms to;
If the deleted data title forbids that with this stored deleted data title of forbidding of deleted data table does not conform to, then allow to meet the data of this deleted data title in this removable formula Storage Media of deletion, otherwise then do not allow to delete the data that meet this deleted data title in this removable formula Storage Media.
23. read-only guard method as removable formula Storage Media as described in the claim 14; it is characterized in that; further set up one and forbid the deleted data table; this forbids that the deleted data table is to store to forbid the deleted data title; this write command also further comprises desire deleted data title again; and after the write command that receives removable formula Storage Media, further comprise the following steps:
Judge whether to allow to delete the data of removable formula Storage Media, for the data name of comparison desire deletion forbids with this whether the stored deleted data title of forbidding of deleted data table conforms to;
If the deleted data title forbids that with this stored deleted data title of forbidding of deleted data table does not conform to, then allow to meet the data of this deleted data title in this removable formula Storage Media of deletion, otherwise then do not allow to delete the data that meet this deleted data title in this removable formula Storage Media.
24. read-only guard method as removable formula Storage Media as described in the claim 15; it is characterized in that; further set up one and forbid the deleted data table; this forbids that the deleted data table is to store to forbid the deleted data title; this write command also further comprises desire deleted data title again; and after the write command that receives removable formula Storage Media, further comprise the following steps:
Judge whether to allow to delete the data of removable formula Storage Media, for the data name of comparison desire deletion forbids with this whether the stored deleted data title of forbidding of deleted data table conforms to;
If the deleted data title forbids that with this stored deleted data title of forbidding of deleted data table does not conform to, then allow to meet the data of this deleted data title in this removable formula Storage Media of deletion, otherwise then do not allow to delete the data that meet this deleted data title in this removable formula Storage Media.
25. read-only guard method as removable formula Storage Media as described in the claim 16; it is characterized in that; further set up one and forbid the deleted data table; this forbids that the deleted data table is to store to forbid the deleted data title; this write command also further comprises desire deleted data title again; and after the write command that receives removable formula Storage Media, further comprise the following steps:
Judge whether to allow to delete the data of removable formula Storage Media, for the data name of comparison desire deletion forbids with this whether the stored deleted data title of forbidding of deleted data table conforms to;
If the deleted data title forbids that with this stored deleted data title of forbidding of deleted data table does not conform to, then allow to meet the data of this deleted data title in this removable formula Storage Media of deletion, otherwise then do not allow to delete the data that meet this deleted data title in this removable formula Storage Media.
26. read-only guard method as removable formula Storage Media as described in the claim 17; it is characterized in that; further set up one and forbid the deleted data table; this forbids that the deleted data table is to store to forbid the deleted data title; this write command also further comprises desire deleted data title again; and after the write command that receives removable formula Storage Media, further comprise the following steps:
Judge whether to allow to delete the data of removable formula Storage Media, for the data name of comparison desire deletion forbids with this whether the stored deleted data title of forbidding of deleted data table conforms to;
If the deleted data title forbids that with this stored deleted data title of forbidding of deleted data table does not conform to, then allow to meet the data of this deleted data title in this removable formula Storage Media of deletion, otherwise then do not allow to delete the data that meet this deleted data title in this removable formula Storage Media.
27. read-only guard method as removable formula Storage Media as described in the claim 18; it is characterized in that; further set up one and forbid the deleted data table; this forbids that the deleted data table is to store to forbid the deleted data title; this write command also further comprises desire deleted data title again; and after the write command that receives removable formula Storage Media, further comprise the following steps:
Judge whether to allow to delete the data of removable formula Storage Media, for the data name of comparison desire deletion forbids with this whether the stored deleted data title of forbidding of deleted data table conforms to;
If the deleted data title forbids that with this stored deleted data title of forbidding of deleted data table does not conform to, then allow to meet the data of this deleted data title in this removable formula Storage Media of deletion, otherwise then do not allow to delete the data that meet this deleted data title in this removable formula Storage Media.
28. read-only guard method as removable formula Storage Media as described in the claim 19; it is characterized in that; further set up one and forbid the deleted data table; this forbids that the deleted data table is to store to forbid the deleted data title; this write command also further comprises desire deleted data title again; and after the write command that receives removable formula Storage Media, further comprise the following steps:
Judge whether to allow to delete the data of removable formula Storage Media, for the data name of comparison desire deletion forbids with this whether the stored deleted data title of forbidding of deleted data table conforms to;
If the deleted data title forbids that with this stored deleted data title of forbidding of deleted data table does not conform to, then allow to meet the data of this deleted data title in this removable formula Storage Media of deletion, otherwise then do not allow to delete the data that meet this deleted data title in this removable formula Storage Media.
29. read-only guard method as removable formula Storage Media as described in the claim 20; it is characterized in that; further set up one and forbid the deleted data table; this forbids that the deleted data table is to store to forbid the deleted data title; this write command also further comprises desire deleted data title again; and after the write command that receives removable formula Storage Media, further comprise the following steps:
Judge whether to allow to delete the data of removable formula Storage Media, for the data name of comparison desire deletion forbids with this whether the stored deleted data title of forbidding of deleted data table conforms to;
If the deleted data title forbids that with this stored deleted data title of forbidding of deleted data table does not conform to, then allow to meet the data of this deleted data title in this removable formula Storage Media of deletion, otherwise then do not allow to delete the data that meet this deleted data title in this removable formula Storage Media.
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| CN2009102074085A CN102054143A (en) | 2009-10-30 | 2009-10-30 | Read-only protection method for removable storage media |
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| CN103020510A (en) * | 2011-09-28 | 2013-04-03 | 奇智软件（北京）有限公司 | Method and device for identifying illegal writing in portable storage equipment |
| CN103020510B (en) * | 2011-09-28 | 2016-08-03 | 北京奇虎科技有限公司 | A kind of method and device of the illegal write identified in movable storage device |
| CN103235730A (en) * | 2013-04-27 | 2013-08-07 | 天津长瑞华通科技发展有限公司 | Portable management device based on C/S (client/server) client software and implementation method of device |
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Application publication date: 20110511 |