CN102521168A - Data anti-copy method for storage card - Google Patents
Data anti-copy method for storage card Download PDFInfo
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- CN102521168A CN102521168A CN2011104248939A CN201110424893A CN102521168A CN 102521168 A CN102521168 A CN 102521168A CN 2011104248939 A CN2011104248939 A CN 2011104248939A CN 201110424893 A CN201110424893 A CN 201110424893A CN 102521168 A CN102521168 A CN 102521168A
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Abstract
The invention provides a data anti-copy method for a storage card, which includes the steps: copying protected data into the storage card; writing copied data addresses and reading rate decision thresholds into parameter regions; when a storage card main unit is connected with the storage card and transmits data reading commands, recording addresses of the read data and computing the data reading rate; comparing the read addresses and the recorded data addresses in the parameter regions; comparing the computed data reading rate with the reading rate decision thresholds written in the parameter regions; comparing the read data addresses and last read data addresses and judging whether the read data addresses and the last read data addresses are continuous; terminating data reading between the storage card and the storage card main unit, or resending the revised read data into the storage card main unit; and confirming the current storage card to be positioned in normal use condition, normally reading the data and transmitting the data to the storage main unit. Anti-copy of the data can be realized only by revising storage card firmware without revising hardware and increasing cost.
Description
Technical field
The present invention relates to the data security technical field, specifically, the present invention relates to a kind of data anti-copy method that is used for storage card.
Background technology
Copyright protection all is across the obstacle together between manufacturer and consumer all the time.On the one hand the consumer hopes to obtain not having the experience of any restriction, and production firm hopes that the product that oneself provides can access enough protections and do not usurped by other producers on the other hand.SD (numeric security) card association has defined CPRM (recordable media content protecting standard), realizes being applied to the copyright protection of content in the card digital content and selling this market through the asymmetric enciphering and deciphering algorithm of complicacy.Its basic goal then is to hope under the situation that does not influence consumer's use, to prevent that it from carrying out copy propagation with digital content.But CPRM technical requirement SD card is all supported CPRM with the corresponding device of this card that uses, and therefore can cause the cost of device obviously to improve.
In fact not all application market all need be used the so complicated protection mechanism of CPRM, and producer only hopes to have simple relatively data anti-copy method sometimes, avoids most of ordinary consumer only just data to be duplicated through simple means.
Certain manufacturer has designed a cover seller case to the SD card of its production: in every SD card, store some legal songs in advance, to strengthen the attractive force of its SD card.Obviously, in order to protect the rights and interests of oneself, this manufacturer does not hope that these songs are copied out the use to other people by the user, promptly need adopt the data anti-copy method to realize this purpose.If adopt aforesaid CPRM technology, then require player also must support CPRM.But manufacturer only produces the SD card, can't the person of curbing consumption use which kind of playing device.If adopted CPRM, the limitation that then can cause its SD card to use increases greatly, is unfavorable for its sale on the contrary.
Therefore, manufacturer hopes that a kind of method can be arranged, its SD is stuck on the common music player uses, and the song files that normal play is built-in, simultaneously the user can't arbitrarily duplicate out cartoon being crossed after card reader connects PC with song files.
Summary of the invention
Technical matters to be solved by this invention provides a kind of data anti-copy method that is used for storage card, only needs to realize through revising memory card firmware, need not to relate to the modification on the hardware, does not increase cost.
For solving the problems of the technologies described above, the present invention provides a kind of data anti-copy method that is used for storage card, comprises step:
A. with normal mode protected data is copied in the said storage card;
B. in the parameter region of said storage card, write the address and the reading rate decision threshold of the said data that copied;
C. the storage card main frame is coupled to be connect and when sending data read command, the address of the said data that record is read also begins the computational data reading rate when said storage card detects;
D. said address of reading the said data that write down in address and the said parameter region is compared,, then carry out step e, otherwise jump to step H if saidly read the address realm that the address is positioned at the said data of record;
E. the said reading rate decision threshold that writes in the said data read rates that will calculate in real time and the said parameter region is compared, if current said data read rates greater than said reading rate decision threshold, is then carried out step F, otherwise jumps to step H;
The address and the preceding address of once reading of F. said data being read compare, and judge whether both are continuous, if continuously then carry out step G, otherwise jump to step H;
G. stop the data read operation between said storage card and its main frame, perhaps with sending said storage card main frame behind the data modification that is read again to;
H. assert that current said storage card is in normal operating position, normally reads and send to said storage card main frame with said data.
Alternatively, said storage card comprises common SD card, Mini SD card and Micro SD card.
Alternatively, said storage card main frame comprises card reader, music player, video player.
Alternatively, said reading rate decision threshold is the 150K byte per second.
Alternatively, said protected data comprises song files, video file and document files.
Alternatively, said storage card and said storage card main frame are supported USB 1.0 interfaces, USB1.1 interface and/or USB2.0 interface.
Compared with prior art, the present invention has the following advantages:
Data anti-copy method of the present invention is realized simple relatively, need not the special hardware design, also need not complicated AES, and cost is also unaffected, relatively is fit to the simple data anti-copy of some needs application scenario.
In sum, data anti-copy method of the present invention is realized very simple, only need can realize through the mode of revising firmware existing storage card, and owing to need not to relate to the modification on the hardware, it is very little therefore cost to be increased influence.For manufacturer, can switch the copy-proof function of storage card at any time, only need get final product, so reduced to produce the stock's that special storage card causes risk according to the turn of the market firmware that upgrades in time.This method has been particularly suitable for certain copyright protection demand, and it is too strict that protection mechanism does not need, but make every effort to be simple and easy to and to production cost and the price manufacturer of sensitivity very.
Description of drawings
Above-mentioned and other characteristic, character and advantage of the present invention will become more obvious through the description below in conjunction with accompanying drawing and embodiment, wherein:
Fig. 1 is the process flow diagram of the data anti-copy method that is used for storage card of one embodiment of the invention.
Embodiment
Below in conjunction with specific embodiment and accompanying drawing the present invention is described further; Set forth more details in the following description so that make much of the present invention; But the present invention obviously can implement with the multiple alternate manner that is different from this description; Those skilled in the art can do similar popularization, deduction according to practical situations under the situation of intension of the present invention, therefore should be with content constraints protection scope of the present invention of this specific embodiment.
Fig. 1 is the process flow diagram of the data anti-copy method that is used for storage card of one embodiment of the invention.As shown in Figure 1, this data anti-copy method can comprise:
Execution in step S101 copies protected data in the storage card to normal mode;
Execution in step S102 writes the address and the reading rate decision threshold of the data that copied in the parameter region of storage card;
Execution in step S103, the storage card main frame is coupled to be connect and when sending data read command, the address of the data that record is read also begins the computational data reading rate when storage card detects;
Execution in step S104 compares the address of reading data recorded in address and the parameter region, if read the address realm that the address is positioned at data recorded, then carries out step S105, otherwise jumps to step S108;
Execution in step S105 compares the reading rate decision threshold that writes in the data read rates of calculating in real time and the parameter region, if current data read rates greater than the reading rate decision threshold, is then carried out step S106, otherwise jumps to step S108;
Execution in step S106, address and preceding address of once reading that data are read compare, and judge whether both are continuous, if continuously then carry out step S107, otherwise jump to step S108;
Execution in step S107 stops the data read operation between storage card and its main frame, perhaps with sending the storage card main frame behind the data modification that is read again to;
Execution in step S108 assert that current storage card is in normal operating position, and data are normally read and send to the storage card main frame.
Selecting with common SD card below is example as storage card, with song files as protected data, and the data anti-copy method that is used for storage card of the present invention is explained in more detail.
Present embodiment in fact can be divided into the step in two stages: SD card volume production production run and the actual use of SD card.At this, SD card volume production production run is described at first.
Use this method to revise the SD holding firmware, add aforesaid copy-proof function, its volume production production run is following:
During volume production the amended firmware of burning to the SD card.
2. some song files that receive copyright protection that need preset are copied in the middle of the SD card.
3. the parameter region at the SD card writes reading rate decision threshold (for example 150K byte per second), and the contents such as data address of the song files of copy.
Only need above-mentioned several steps, can volume production go out the SD card of built-in anti-copy song files, compare general SD card, the song files that just presets storage has and prevents the function that copies, and other use indistinction.
Then describe the actual use of SD card, this SD card processing procedure in actual use is following:
1) SD card power-up initializing gets into operate as normal.
2) to detect SD card main frame (can be card reader, music player or video player to the SD card; This SD card and SD card main frame can be supported USB 1.0 interfaces, USB1.1 interface and/or USB2.0 interface) send data read command, the address that record reads also begins the computational data reading rate.
3) in the time of will reading the address with volume production before in the parameter region data recorded address compare, if be in these recorded address scopes, represent that then current what read is the shielded song files data that preset, jump to step 4) this moment; Otherwise jump to step 7).
4) the reading rate decision threshold that writes in the data read rates that will calculate in real time and the parameter region is before compared, if current reading rate greater than threshold value, then jumps to step 5); Otherwise jump to step 7).
5) address of whether reading with the last time, the judgment data address of reading is continuous, if continuously then represent the current operating process that is in copies data, jumps to step 6); Otherwise jump to step 7).
6) termination data transmission procedure is between the two perhaps revised the advanced row of data, and then is passed to the storage card main frame.
7) think the current situation that player uses that is in, the data that perhaps read not are the shielded song files data that preset, and therefore the storage card main frame is normally read and passed to data and get final product.
Can know that by said process if copy is the song files that needs anti-copy, what then copy function was interrupted or obtained will be the file that data have more been corrected one's mistakes, and can't normally use; And if the copy be the other types files, then unaffected.
In the present embodiment, said memory card comprises that also the various Mini SD cards and the Micro SD card that meet the SD standard can adopt said method except common SD card.And protected data can also comprise video file and document files etc. except song files.
Next, with the concrete realization principles illustrated of the data anti-copy method that is used for storage card of the present invention once, this method can satisfy the demand of manufacturer basically again.Concrete realization principle is following:
Do not influence the function of player normal play when 1, realizing the data file anti-copy again, for storage card, must be able to tell is the player plays operation, or data copy operation.
2, player plays song files and copy device (connecing card reader like PC) copy song files, behavior is consistent in theory for storage card, all is reading of data.But the speed of player reading of data is that there is a big difference with the speed of copies data, and this point is that the behavior of storage card resolution read data is that player produces or the fundamental basis that the PC card reader produces.
3, be example with the MP3 song files, its highest code check is 320Kbps, and promptly the playback rate of p.s. is 320K bit data.Being converted into byte, then is the speed of 40K byte per second, and corresponding data read rates also must be consistent with this speed when music player was play.And copy device is when carrying out copying data; All be as far as possible with the fastest speed reading of data, connecing card reader with PC is example, and common card reader all is a USB interface; The low speed card reader adopts USB 1.1 interfaces, its speed at 300K byte per second to 1 megabyte per second.And the high speed card reader adopts USB 2.0 interfaces, and its speed reaches the speed of several million even tens megabyte per seconds especially.Obviously the speed difference of the data read rates of player and copies data is apart from quite big.Can distinguish through setting a clear and definite reading rate decision threshold fully, such as 150K byte per second.
4, player is when fast forwarding and fast rewinding, and the process of reading of data is a jumping mode, and the process of copies data is connected reference often then, so this point also can be further as the judgement foundation.
5, when storage card judges that the speed of reading of data surpasses preset reading rate decision threshold, can be judged to be the copy behavior, can adopt this moment replacement data perhaps to stop modes such as data transmission, prevent that data are copied.
6, in addition, consider that the user uses contents such as this storage card storage alternative document, so storage card need discern also to file, if the file that the user adds does not then copy the action of protection, in order to avoid influence is used.Therefore storage card only needs the record address at the data place of the shielded for example song files of storage in advance between dispatching from the factory; When the user carries out in the copied files operating process, whether the address that storage card is differentiated reading of data gets final product the address of protected file.
Can know that according to foregoing description above-mentioned functions realizes very simple, only need to revise memory card firmware, adding corresponding judgment mechanism can realize.Certainly, adjudicate through data reading speed, intact no all roses, in fact the user can design special copy device at a slow speed and walk around this anti-copy mechanism.But for most consumers, difficultly accomplish or need the high cost of cost that therefore protection requires strict especially application for some small-sized manufacturers or as far as data, this method because realize simple, so still very worth employing.
Data anti-copy method of the present invention is realized simple relatively, need not the special hardware design, also need not complicated AES, and cost is also unaffected, relatively is fit to the simple data anti-copy of some needs application scenario.
In sum, data anti-copy method of the present invention is realized very simple, only need can realize through the mode of revising firmware existing storage card, and owing to need not to relate to the modification on the hardware, it is very little therefore cost to be increased influence.For manufacturer, can switch the copy-proof function of storage card at any time, only need get final product, so reduced to produce the stock's that special storage card causes risk according to the turn of the market firmware that upgrades in time.This method has been particularly suitable for certain copyright protection demand, and it is too strict that protection mechanism does not need, but make every effort to be simple and easy to and to production cost and the price manufacturer of sensitivity very.
Though the present invention with preferred embodiment openly as above, it is not to be used for limiting the present invention, and any those skilled in the art are not breaking away from the spirit and scope of the present invention, can make possible change and modification.Therefore, every content that does not break away from technical scheme of the present invention, according to technical spirit of the present invention to any modification, equivalent variations and modification that above embodiment did, within the protection domain that all falls into claim of the present invention and defined.
Claims (6)
1. data anti-copy method that is used for storage card comprises step:
A. with normal mode protected data is copied in the said storage card;
B. in the parameter region of said storage card, write the address and the reading rate decision threshold of the said data that copied;
C. the storage card main frame is coupled to be connect and when sending data read command, the address of the said data that record is read also begins the computational data reading rate when said storage card detects;
D. said address of reading the said data that write down in address and the said parameter region is compared,, then carry out step e, otherwise jump to step H if saidly read the address realm that the address is positioned at the said data of record;
E. the said reading rate decision threshold that writes in the said data read rates that will calculate in real time and the said parameter region is compared, if current said data read rates greater than said reading rate decision threshold, is then carried out step F, otherwise jumps to step H;
The address and the preceding address of once reading of F. said data being read compare, and judge whether both are continuous, if continuously then carry out step G, otherwise jump to step H;
G. stop the data read operation between said storage card and its main frame, perhaps with sending said storage card main frame behind the data modification that is read again to;
H. assert that current said storage card is in normal operating position, normally reads and send to said storage card main frame with said data.
2. data anti-copy method according to claim 1 is characterized in that, said storage card comprises common SD card, Mini SD card and Micro SD card.
3. data anti-copy method according to claim 2 is characterized in that, said storage card main frame comprises card reader, music player, video player.
4. data anti-copy method according to claim 3 is characterized in that, said reading rate decision threshold is the 150K byte per second.
5. data anti-copy method according to claim 4 is characterized in that said protected data comprises song files, video file and document files.
6. data anti-copy method according to claim 5 is characterized in that, said storage card and said storage card main frame are supported USB 1.0 interfaces, USB1.1 interface and/or USB2.0 interface.
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| CN2011104248939A CN102521168A (en) | 2011-12-16 | 2011-12-16 | Data anti-copy method for storage card |
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| CN2011104248939A CN102521168A (en) | 2011-12-16 | 2011-12-16 | Data anti-copy method for storage card |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107526978A (en) * | 2017-08-23 | 2017-12-29 | 深圳市朗科科技股份有限公司 | A kind of method and flash disk of data anti-copying shellfish |
| CN109388916A (en) * | 2017-08-04 | 2019-02-26 | 北京酷我科技有限公司 | A kind of processing method and system of song data |
| CN110110502A (en) * | 2019-04-28 | 2019-08-09 | 深圳市得一微电子有限责任公司 | Anti-copy method, device and the removable storage device of audio file |
| CN110851795A (en) * | 2019-11-07 | 2020-02-28 | 深圳市四季宏胜科技有限公司 | File management method, device, equipment and readable storage medium |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109388916A (en) * | 2017-08-04 | 2019-02-26 | 北京酷我科技有限公司 | A kind of processing method and system of song data |
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| CN110110502A (en) * | 2019-04-28 | 2019-08-09 | 深圳市得一微电子有限责任公司 | Anti-copy method, device and the removable storage device of audio file |
| CN110851795A (en) * | 2019-11-07 | 2020-02-28 | 深圳市四季宏胜科技有限公司 | File management method, device, equipment and readable storage medium |
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Application publication date: 20120627 |