CN101853193A - Data protection restoration method, system and card based on hard disk controller - Google Patents
Data protection restoration method, system and card based on hard disk controller Download PDFInfo
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- CN101853193A CN101853193A CN200910081238A CN200910081238A CN101853193A CN 101853193 A CN101853193 A CN 101853193A CN 200910081238 A CN200910081238 A CN 200910081238A CN 200910081238 A CN200910081238 A CN 200910081238A CN 101853193 A CN101853193 A CN 101853193A
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Abstract
The invention discloses a data protection restoration method based on a hard disk controller, which comprises the following steps of : setting the hard disk controller, a hard disk controller BIOS (Basic Input Output System) module, a hard disk controller driving module and a protection restoration module in a computer system; and when the hard disk controller receives a hard disk reading or writing instruction, taking over reading or writing operation on a hard disk by the hard disk controller BIOS module or the hard disk controller driving module and the protection restoration module so as to carry out protection restoration control on hard disk data. Because the invention adopts a design which integrates programs used for special control of data protection restoration with BIOS and drivers of the hard disk controller, the program cannot be removed or avoided by other software (such as virus), thereby the reliable operation on hard disk data protection restoration is realized. The invention also discloses a data protection restoration system and a data protection restoration card based on the method.
Description
Technical field
The present invention relates to computer data protection reduction field, relate in particular to the data protection restoration field of hard disc of computer.
Background technology
The hardware of multi-purpose computer mainly is made up of CPU, internal memory, mainboard, hard disk and display and some peripherals, and hard disk is that the user is used for the main media of installing operating system and storage data.The user will operate hard disk, need possess following two conditions:
Hardware aspect: need hard disk controller, hard disk controller generally is integrated on the computer motherboard or exists with the form of outer plug-in card;
Software aspect: the driver that needs hard disk controller under the BIOS (Basic Input/Output System, Basic Input or Output System (BIOS)) of hard disk controller and the various operating system.
Before operating system is not activated (as the computer booting self check stage), hard disk controller work mainly depends on the BIOS of hard disk controller, and this moment, BIOS mainly provided INT 13 services (interrupt INT 13); After os starting, hard disk controller work mainly depend on operating system under hard disk controller driver (Driver).
In general, different hard disk controllers needs different B IOS and driver, and these BIOS and driver all are to be provided and safeguarded by the hardware vendor basically.
Because hard disk has been taken on the important task of storaging user data, guarantee that the safety of hard disc data is just very necessary.At present; the protection hard disc data mainly contains dual mode: a kind of is the mode that adopts pure software; promptly under operating system, antivirus software is installed, the shortcoming of this mode is occupying system resources, need constantly carry out the virus base upgrading, passive gas defence, easily by virus shielding etc.Another kind of mode adopts the protection reduction technique of software and hardware combining.
The product of realization data protection restoration on the market mainly contains following form and method at present
1, PCI ROM expansion technique: utilize extrapolation PCI (Peripheral Component Interconnection, local bus) card can be expanded the characteristic of Option ROM (ROM (read-only memory)), finish in computer self-test (this moment hard disk controller start working, the BIOS of hard disk controller brings into operation) after, utilize hook (HOOK) technology, hook INT 13 services at this moment, thus realization is to the control of hard disk operation.
Adopt PCI ROM expansion technique defective: require computer BIOS in the start-up course must support to call the Option ROM of outer plug-in card; If BIOS does not call the Option ROM of outer plug-in card, just Option ROM does not obtain carrying out, and the action of linking up with INT 13 this moment does not just realize, does not realize the special control (special control is protection reduction service) to hard disk read-write operations.
2, MBR articulates technology: MBR (Master Boot Record, hard disk master boot record), and after computer self-test was finished, the operating system first step on the guiding hard disk read MBR by system bios exactly; It mainly is to utilize this characteristic that part protection is gone back original product, adopts the form of replacement MBR, realizes hook technology, hook INT 13 services at this moment, thus realization is to the control of hard disk operation.
MBR articulates technological deficiency: after having realized that special MBR replaces it, if there is other software also MBR to be revised, this moment, the code of hook lost efficacy, and realization can not be to the hook of INT 13H, and the protection reduction is inoperative.
3. driver articulates technology under the operating system: behind os starting, a special filtration drive (Filter Driver) program is installed, by linking up with the driver of original hard disk controller, is implemented under the operating system control to hard disk.
Driver articulates technological deficiency under the operating system: because present operating system generally all adopts the thought of hierarchical design; filter drive program (can realize the special control of data protection restoration) is not the necessary driver of operating system, and virus or wooden horse can make filter drive program lose efficacy or walk around filter drive program.
To sum up, as shown in Figure 1, existing data protection restoration technology mainly is the service that provides by the BIOS that uses filter drive program and hook hard disk controller, realizes the control to disk read-write indirectly; As shown in Figures 2 and 3, the critical defect of existing data protection restoration technology is that the filter drive program that can carry out the special control of data protection restoration can be removed or get around by other software (as virus), thereby ineffective.
In addition, existing data protection restoration technology has generally adopted hard disk mapping method of reducing more, and the hard disk map information is to be stored in the hard disk, and reading and upgrading map information all needs hard disk operation, influences very much the speed and the efficient of hard disk.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of data protection restoration method and system based on hard disk controller; overcome the defective of existing data protection restoration technology, the program of promptly carrying out the special control of data protection restoration may be by virus infections and ineffective and hard disk map information influences the speed and the efficient of hard disk because be stored in the hard disk.
In order to solve the problems of the technologies described above, the invention provides a kind of data protection restoration method based on hard disk controller, may further comprise the steps: hard disk controller is set in computer system, and is described hard disk controller configuration hard disk controller BIOS module, hard disk controller driver module and protection recovery module; Described hard disk controller is connected between hard disk and the computer system bus; When described hard disk controller receives the disk read-write instruction of being sent by described computer system bus; call described hard disk controller BIOS module or hard disk controller driver module hard disk is carried out read-write operation; in the read-write operation process, described hard disk controller calls described protection recovery module hard disc data is protected reduction control.
Preferably, the described step of protecting reduction to control to hard disc data comprises: with hard disk partition is protected location, non-protection area and buffer zone, and preserves this hard disk setting; When carrying out the hard disk write operation, judge that data to be written are protected location data or non-protection area data; If the non-protection area data write described non-protection area with data; If the protected location data write described buffer zone with data, and preserve the mapping relations of these data in described buffer zone and protected location; When carrying out the hard disk read operation, judge that data to be read are protected location data or non-protection area data, if the non-protection area data, from described non-protection area reading of data; If the protected location data judge whether to exist the mapping relations about these data, if having, according to mapping relations from described buffer zone reading of data; If no, from described protected location reading of data.
Further preferred, data are write described buffer zone after, wait for user instruction, if user instruction is abandoned this data, then delete about the mapping relations of these data and these data in the delete buffer; If user instruction is preserved this data, then merge to described protected location according to the data that will be stored in described buffer zone about the mapping relations of these data.
Further preferred, described hard disk controller also disposes expansion ROM, and described hard disk controller BIOS module, data map relation are stored in the described expansion ROM; Described hard disk controller driver module is stored on the hard disk.
Preferably, in the computer operating system start-up course, when described hard disk controller receives the disk read-write instruction of being sent by described computer system bus, call described hard disk controller BIOS module hard disk is carried out read-write operation; After the computer operating system startup is finished, when described hard disk controller receives the disk read-write instruction of being sent by described computer system bus, call described hard disk controller driver module hard disk is carried out read-write operation.
The present invention also provides a kind of data protection restoration system based on hard disk controller, comprises hard disk controller, hard disk controller BIOS module, hard disk controller driver module and protection recovery module; Wherein, described hard disk controller is connected between computer system bus and the hard disk, is used in the computer operating system start-up course, when receiving the disk read-write instruction, calls described hard disk controller BIOS module reading writing harddisk data; Also be used for after the computer operating system startup is finished, when receiving the disk read-write instruction, calling described hard disk controller driver module reading writing harddisk data; Described protection recovery module is used for the process at described hard disk controller reading writing harddisk, and hard disc data is protected reduction control.
Preferably, described protection recovery module protects the process of reduction control to be to hard disc data: with hard disk partition is protected location, non-protection area and buffer zone, and preserves this hard disk setting; When carrying out the hard disk write operation, judge that data to be written are protected location data or non-protection area data; If the non-protection area data write described non-protection area with data; If the protected location data write described buffer zone with data, and preserve the mapping relations of these data in described buffer zone and protected location; When carrying out the hard disk read operation, judge that data to be read are protected location data or non-protection area data, if the non-protection area data, from described non-protection area reading of data; If the protected location data judge whether to exist the mapping relations about these data, if having, according to mapping relations from described buffer zone reading of data; If no, from described protected location reading of data; Described protection recovery module also is used for after data are write described buffer zone, waits for user instruction, if user instruction is abandoned this data, then deletes about the mapping relations of these data and these data in the delete buffer; If user instruction is preserved this data, then merge to described protected location according to the data that will be stored in described buffer zone about the mapping relations of these data.
Further preferred, described a kind of data protection restoration system based on hard disk controller also comprises expansion ROM, and described hard disk controller BIOS module, data map relation are stored in the described expansion ROM; Described hard disk controller driver module is stored on the hard disk.
The present invention also provides a kind of data protection restoration card based on hard disk controller, comprise hard disk controller, hard-disk interface, bus interface and expansion ROM, store hard disk controller BIOS module and protection recovery module in the described expansion ROM, described hard disk controller links to each other with hard disk and computer system bus respectively with bus interface by hard-disk interface, also store the hard disk controller driver module in the hard disk, wherein, described hard disk controller is used in the computer operating system start-up course, when receiving the disk read-write instruction, call described hard disk controller BIOS module reading writing harddisk data; Also be used for after the computer operating system startup is finished, when receiving the disk read-write instruction, calling described hard disk controller driver module reading writing harddisk data; Described hard disk controller calls described protection recovery module hard disc data is protected reduction control in the reading writing harddisk process.
Preferably, described protection recovery module protects the process of reduction control to be to hard disc data: with hard disk partition is protected location, non-protection area and buffer zone, and preserves this hard disk setting; When carrying out the hard disk write operation, judge that data to be written are protected location data or non-protection area data; If the non-protection area data write described non-protection area with data; If the protected location data write described buffer zone with data, and preserve the mapping relations of these data in described buffer zone and protected location; When carrying out the hard disk read operation, judge that data to be read are protected location data or non-protection area data, if the non-protection area data, from described non-protection area reading of data; If the protected location data judge whether to exist the mapping relations about these data, if having, according to mapping relations from described buffer zone reading of data; If no, from described protected location reading of data; Described protection recovery module also is used for after data are write described buffer zone, waits for user instruction, if user instruction is abandoned this data, then deletes about the mapping relations of these data and these data in the delete buffer; If user instruction is preserved this data, then merge to described protected location according to the data that will be stored in described buffer zone about the mapping relations of these data.Described expansion ROM also is used to store described hard disk setting and mapping relations.
The present invention has adopted program and the BIOS of hard disk controller and the integrated design of driver that will carry out the special control of data protection restoration, therefore this program can not removed or get around by other software (as virus), having realized the reliable operation to the hard disk data protection reduction, is data protection restoration truly; The present invention has also adopted the method that stores the hard disk map information in the ROM of expansion, and the read-while writing work of the visit of expansion ROM and hard disk does not influence the work efficiency of hard disk.
Description of drawings
The existing data protection restoration know-why of Fig. 1 synoptic diagram.
The existing data protection restoration technological deficiency of Fig. 2 synoptic diagram, filter drive program is not that operating system is necessary, can be removed by virus or Rogue program.
The existing data protection restoration technological deficiency of Fig. 3 synoptic diagram, virus or Rogue program can get around filter drive program, though this moment filter drive program also work, inoperative.
Fig. 4 principle schematic of the present invention, hard disk controller drive and the integrated design of protection recovery module, and the protection recovery module can not got around or remove.
Fig. 5 the inventive method reads the data flowchart of hard disk.
Fig. 6 the inventive method writes the data flowchart of hard disk.
The structural representation of Fig. 7 protection card of the present invention.
Embodiment
As shown in Figure 4, be principle schematic of the present invention.Hard disk controller is set in computer system, and is described hard disk controller configuration hard disk controller BIOS module, hard disk controller driver module and protection recovery module.After os starting is finished; when hard disk controller receives the disk read-write instruction of being sent by described computer system bus; call the hard disk controller driver module hard disk is carried out read-write operation; but because hard disk controller driver module and protection recovery module are by integrated design; be bundled in one; therefore; all all can be through the filtration protection of overprotection recovery module to hard disk read-write operations; promptly protect recovery module to protect reduction control to hard disc data, the protection recovery module can not got around or be removed.Same reason; before os starting; when hard disk controller receives the disk read-write instruction of being sent by described computer system bus; call hard disk controller BIOS module hard disk is carried out read-write operation; but because hard disk controller BIOS module and protection recovery module are by integrated design; be bundled in one; therefore; all of this moment also all can be through the filtration protection of overprotection recovery module to hard disk read-write operations; promptly protect recovery module to protect reduction control to hard disc data, the protection recovery module can not got around or be removed.
The concrete realization flow of protection recovery module is:
A, offer the User Interface that one of user can manage hard disk (space that this interface can be by expanded BIOS ROM or utilize the special area of hard disk to deposit);
B, user can divide between buffer empty at this interface, and the user can set protection zone (as protection C dish);
C, user's setting is kept on the extended memory;
When D, hard disk controller work, the idiographic flow that reads hard disk as shown in Figure 5 is:
Whether step 102, the data that judgement will be read if not turn to step 103 in the protected location, if turn to step 104;
Step 103 directly reads to hard disk;
Step 104 reads the mapping relations table among the ROM;
Step 105 judges whether the data in protected district have mapping relations, turns to step 106 if not, if turn to step 107;
When E, hard disk controller work, the idiographic flow that writes hard disk as shown in Figure 6 is:
Whether step 202, the data that judgement will be read if not turn to step 203 in the protected location, if turn to step 204;
Mapping relations do not take place in step 207, create new hard disk buffer zone and mapping relations;
The realization of F, protection reduction: the user has been rewritten to buffer zone to the write operation of the protection zone of hard disk in the process of operation, the real protection area data is not rewritten; If user's decision does not need to preserve the data of operation last time, then directly delete in the map information of expansion ROM the inside and the content of buffer zone, thus the function of realization reduction; If the user determines to preserve the data of operation last time,, the content of buffer zone is merged to the inside, protected field then according at expansion ROM the inside map information.Thereby realized the renewal of data.
Can also be for hard disk controller also dispose expansion ROM, hard disk controller BIOS module, data map relation are stored in the described expansion ROM, because the read-while writing work of the visit of expansion ROM and hard disk, do not influence the work efficiency of hard disk.
As shown in Figure 7; structural representation based on the specific embodiment of the data protection restoration card of the inventive method; this card has hard disk controller and the expansion ROM of oneself; bus interface is connected to system bus; hard-disk interface is connected to the hard disc data line, and this interface can be that the hard-disk interface of IDE hard-disk interface or SATA hard-disk interface or other types can be unrestricted.So just make this card connection between hard disk and main board system bus; all read-write operations to hard disk must pass through this card; add the integrated design of hard disk controller BIOS module, hard disk controller driver module and protection recovery module; therefore the operation of protection reduction can not removed or get around by other software (as virus), has realized the reliable operation to the hard disk data protection reduction.
Claims (10)
1. the data protection restoration method based on hard disk controller is characterized in that, may further comprise the steps:
Hard disk controller is set in computer system, and is described hard disk controller configuration hard disk controller BIOS module, hard disk controller driver module and protection recovery module;
Described hard disk controller is connected between hard disk and the computer system bus;
When described hard disk controller receives the disk read-write instruction of being sent by described computer system bus; call described hard disk controller BIOS module or hard disk controller driver module hard disk is carried out read-write operation; in the read-write operation process, described hard disk controller calls described protection recovery module hard disc data is protected reduction control.
2. a kind of data protection restoration method based on hard disk controller as claimed in claim 1 is characterized in that, the described step of protecting reduction to control to hard disc data comprises:
With hard disk partition is protected location, non-protection area and buffer zone, and preserves this hard disk setting;
When carrying out the hard disk write operation, judge that data to be written are protected location data or non-protection area data; If the non-protection area data write described non-protection area with data; If the protected location data write described buffer zone with data, and preserve the mapping relations of these data in described buffer zone and protected location;
When carrying out the hard disk read operation, judge that data to be read are protected location data or non-protection area data, if the non-protection area data, from described non-protection area reading of data; If the protected location data judge whether to exist the mapping relations about these data, if having, according to mapping relations from described buffer zone reading of data; If no, from described protected location reading of data.
3. a kind of data protection restoration method as claimed in claim 2 based on hard disk controller, it is characterized in that, data are write described buffer zone after, wait for user instruction, if user instruction is abandoned this data, then delete about the mapping relations of these data and these data in the delete buffer; If user instruction is preserved this data, then merge to described protected location according to the data that will be stored in described buffer zone about the mapping relations of these data.
4. as claim 2 or 3 described a kind of data protection restoration methods based on hard disk controller, it is characterized in that described hard disk controller also disposes expansion ROM, described hard disk controller BIOS module, data map relation are stored in the described expansion ROM; Described hard disk controller driver module is stored on the hard disk.
5. a kind of data protection restoration method based on hard disk controller as claimed in claim 1 is characterized in that,
In the computer operating system start-up course, when described hard disk controller receives the disk read-write instruction of being sent by described computer system bus, call described hard disk controller BIOS module hard disk is carried out read-write operation;
After the computer operating system startup is finished, when described hard disk controller receives the disk read-write instruction of being sent by described computer system bus, call described hard disk controller driver module hard disk is carried out read-write operation.
6. the data protection restoration system based on hard disk controller is characterized in that, comprises hard disk controller, hard disk controller BIOS module, hard disk controller driver module and protection recovery module, wherein,
Described hard disk controller is connected between computer system bus and the hard disk, is used in the computer operating system start-up course, when receiving the disk read-write instruction, calls described hard disk controller BIOS module reading writing harddisk data; Also be used for after the computer operating system startup is finished, when receiving the disk read-write instruction, calling described hard disk controller driver module reading writing harddisk data;
Described protection recovery module is used for the process at described hard disk controller reading writing harddisk, and hard disc data is protected reduction control.
7. a kind of data protection restoration system based on hard disk controller as claimed in claim 6 is characterized in that, described protection recovery module protects the process of reduction control to be to hard disc data:
With hard disk partition is protected location, non-protection area and buffer zone, and preserves this hard disk setting;
When carrying out the hard disk write operation, judge that data to be written are protected location data or non-protection area data; If the non-protection area data write described non-protection area with data; If the protected location data write described buffer zone with data, and preserve the mapping relations of these data in described buffer zone and protected location;
When carrying out the hard disk read operation, judge that data to be read are protected location data or non-protection area data, if the non-protection area data, from described non-protection area reading of data; If the protected location data judge whether to exist the mapping relations about these data, if having, according to mapping relations from described buffer zone reading of data; If no, from described protected location reading of data;
Described protection recovery module also is used for after data are write described buffer zone, waits for user instruction, if user instruction is abandoned this data, then deletes about the mapping relations of these data and these data in the delete buffer; If user instruction is preserved this data, then merge to described protected location according to the data that will be stored in described buffer zone about the mapping relations of these data.
8. a kind of data protection restoration system based on hard disk controller as claimed in claim 7 is characterized in that, also comprises expansion ROM, and described hard disk controller BIOS module, data map relation are stored in the described expansion ROM; Described hard disk controller driver module is stored on the hard disk.
9. data protection restoration card based on hard disk controller; it is characterized in that; comprise hard disk controller, hard-disk interface, bus interface and expansion ROM; store hard disk controller BIOS module and protection recovery module in the described expansion ROM; described hard disk controller links to each other with hard disk and computer system bus respectively with bus interface by hard-disk interface; also store the hard disk controller driver module in the hard disk, wherein
Described hard disk controller is used in the computer operating system start-up course, when receiving the disk read-write instruction, calls described hard disk controller BIOS module reading writing harddisk data; Also be used for after the computer operating system startup is finished, when receiving the disk read-write instruction, calling described hard disk controller driver module reading writing harddisk data;
Described hard disk controller calls described protection recovery module hard disc data is protected reduction control in the reading writing harddisk process.
10. the data protection restoration card based on hard disk controller as claimed in claim 9 is characterized in that, described protection recovery module protects the process of reduction control to be to hard disc data:
With hard disk partition is protected location, non-protection area and buffer zone, and preserves this hard disk setting;
When carrying out the hard disk write operation, judge that data to be written are protected location data or non-protection area data; If the non-protection area data write described non-protection area with data; If the protected location data write described buffer zone with data, and preserve the mapping relations of these data in described buffer zone and protected location;
When carrying out the hard disk read operation, judge that data to be read are protected location data or non-protection area data, if the non-protection area data, from described non-protection area reading of data; If the protected location data judge whether to exist the mapping relations about these data, if having, according to mapping relations from described buffer zone reading of data; If no, from described protected location reading of data;
Described protection recovery module also is used for after data are write described buffer zone, waits for user instruction, if user instruction is abandoned this data, then deletes about the mapping relations of these data and these data in the delete buffer; If user instruction is preserved this data, then merge to described protected location according to the data that will be stored in described buffer zone about the mapping relations of these data.
Described expansion ROM also is used to store described hard disk setting and mapping relations.
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| CN2009100812380A CN101853193B (en) | 2009-03-30 | 2009-03-30 | Data protection restoration method, system and card based on hard disk controller |
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| CN2009100812380A CN101853193B (en) | 2009-03-30 | 2009-03-30 | Data protection restoration method, system and card based on hard disk controller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103034505A (en) * | 2011-09-30 | 2013-04-10 | 英业达股份有限公司 | Read-in data method and electronic device |
| CN106844072A (en) * | 2016-11-21 | 2017-06-13 | 广州视源电子科技股份有限公司 | The reduction protection condition detection method and system of computer operating system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1838082A (en) * | 2005-03-25 | 2006-09-27 | 鸿富锦精密工业（深圳）有限公司 | Computer hard disk data protection method |
| CN100507864C (en) * | 2006-01-19 | 2009-07-01 | 刘文斌 | Data protection and restore method based on instant restore type protection card for hard disk |
| CN101349980B (en) * | 2007-07-18 | 2010-10-06 | 深圳市顶星数码网络技术有限公司 | Hard disk data backup and protection method |
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2009
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103034505A (en) * | 2011-09-30 | 2013-04-10 | 英业达股份有限公司 | Read-in data method and electronic device |
| CN106844072A (en) * | 2016-11-21 | 2017-06-13 | 广州视源电子科技股份有限公司 | The reduction protection condition detection method and system of computer operating system |
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Owner name: BEIJING EASYSAFE INNOVATION TECHNOLOGY CO.,LTD. Free format text: FORMER OWNER: LIU WENBIN Effective date: 20110218 |
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Effective date of registration: 20110218 Address after: 100083, Beijing, Zhichun Road, Haidian District No. 9 Kun building 1105 Applicant after: Easysafe(China)Co.,Ltd. Address before: 100083, Beijing, Zhichun Road, Haidian District No. 9 Kun building 1105 Applicant before: Liu Wenbin |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING GOLDEN GAMING TECHNOLOGIES CO., LTD. Free format text: FORMER NAME: BEIJING EASYSAFE INNOVATION TECHNOLOGY CO.,LTD. |
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| CB03 | Change of inventor or designer information |
Inventor after: Li Liujun Inventor before: Liu Wenbin Inventor before: Qiu Xueyuan Inventor before: Chang Jiangtao |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LIU WENBIN QIU XUEYUAN CHANG JIANGTAO TO: LI LIUJUN |
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| CP01 | Change in the name or title of a patent holder |
Address after: 100083 Beijing, Zhichun Road, Haidian District No. 9, building 1105, Kun news Patentee after: Beijing diamond game Polytron Technologies Inc Address before: 100083 Beijing, Zhichun Road, Haidian District No. 9, building 1105, Kun news Patentee before: Easysafe(China)Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130123 Termination date: 20200330 |