Data anti-copy method for storage card
A memory card and anti-copy technology, applied in the field of data security, can solve the problems of increased limitations of SD cards, unfavorable sales, and inability to restrict which playback devices consumers use, and achieves simple, easy-to-use production costs and sales. The effect of reducing the risk of inventory and inventory
Inactive Publication Date: 2012-06-27
SINO WEALTH ELECTRONICS
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Problems solved by technology
However, manufacturers only produce SD cards, and cannot restrict consumers to use which playback devices
If CPRM is adopted, it will greatly increase the limitations of the use of its SD card, which is not conducive to its sales
[0005] Therefore, the manufacturer hopes to have a method, which can make the SD card be used on an ordinary music player and play the built-in song files normally. At the same time, after the user connects the card to the PC through the card reader, the song file cannot be freely copy out
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[0026] The present invention will be further described below in conjunction with specific embodiment and accompanying drawing, set forth more details in the following description so as to fully understand the present invention, but the present invention can be implemented in many other modes different from this description obviously, Those skilled in the art can make similar promotions and deductions based on actual application situations without violating the connotation of the present invention, so the content of this specific embodiment should not limit the protection scope of the present invention.
[0027] figure 1 It is a flowchart of a data copy protection method for a memory card according to an embodiment of the present invention. Such as figure 1 As shown, the data copy protection method may include:
[0028] Execute step S101, copy the protected data to the memory card in a normal way;
[0029] Execute step S102, write the address of the copied data and the read ...
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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 [0001] The invention relates to the technical field of data security, and in particular, the invention relates to a data copy protection method for a memory card. Background technique [0002] Copyright protection has always been an obstacle between manufacturers and consumers. On the one hand, consumers hope to obtain unrestricted use experience, on the other hand, manufacturers hope that their products can be sufficiently protected from being stolen by other manufacturers. The SD (Digital Security) Card Association defines CPRM (Content Protection Standard for Recordable Media), which uses complex asymmetric encryption and decryption algorithms to realize copyright protection of content in the card, and is used in the digital content sales market. Its fundamental purpose is to prevent consumers from copying and distributing digital content without affecting their use. However, the CPRM technology requires both the SD card and the corresponding device usin...
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Inventor 张钦刘华伟
Owner SINO WEALTH ELECTRONICS