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Read-only memory card - how to make the data from the card read-only

stachu_18 5826 13
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Treść została przetłumaczona polish » english Zobacz oryginalną wersję tematu
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  • #1 16274785
    stachu_18
    Level 13  
    do you know a way to protect your SD / MicroSD card against copying? Read-only.
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  • #2 16274794
    pietia86
    Level 26  
    If it is an SD card it has a write protect switch.

    However, you probably do not know what you want to achieve because - you write once that you want to make it read-only and then that you want to protect it from copying.
  • #3 16274822
    stachu_18
    Level 13  
    It is not clear cut?
    Switch is not an option. I am looking for a solution that will help to listen to MP3, e.g. in a player, and not be able to copy files
  • #4 16274830
    pietia86
    Level 26  
    After all, the player must also read these files. If the file is readable, you can copy it.
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  • #5 16274838
    stachu_18
    Level 13  
    Yes, I know the logic, but the lockout switch exists after all, and it's just a mechanical solution. I read about Transcend cards that have a special device for securing / encrypting the cards - but I couldn't find them on the market.

    It is possible to buy a separate device that will somehow fulfill the intended purpose. It can also be a USB flash drive.
  • #6 16274842
    pietia86
    Level 26  
    stachu_18 wrote:
    Yes, I know the logic, but the lockout switch exists after all, and it's just a mechanical solution.


    The switch on the SD card prevents writing, not reading
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  • #7 16274849
    stachu_18
    Level 13  
    And the solution titled "Just convert the partition to NTFS, and grant the appropriate access rights. To protect the file from the administrator"?
  • #8 16274856
    pietia86
    Level 26  
    I do not know such a solution, but even if you would apply it - will your MP3 player be able to handle NTFS and then access rights?
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  • #9 16274861
    stachu_18
    Level 13  
    as I mentioned - the solution with a memory card and MP3 is ultimately the best. A flash drive and opening the file on the OS are also involved.
  • #10 16274882
    meio.gordo
    Level 8  
    stachu_18 wrote:
    as I mentioned - the solution with a memory card and MP3 is ultimately the best. A flash drive and opening the file on the OS are also involved.


    Protection by creating NTFS partitions and granting appropriate rights is only good for media that will never be physically removed from the computer (eg hard disk). Any NTFS media can be read freely on another computer.
    The only solution is to encrypt the MP3 file and then create your own MP3 player that can play those files.
    It can also be done differently: record the encrypted speech / music to an MP3 file and play it in a regular MP3 player. Then connect the output from it to a "magic box" with an audio input and output that will decrypt the audio signal in real time. This magic box can be realized on a small FPGA or CPLD. Or some traditional solution: once in the magazines there was a description of a telephone encoder on some specialized bones.
  • #11 16275034
    stachu_18
    Level 13  
    Otherwise - how to enable any listening session without the possibility of copying, without user control, e.g. remotely.
    Do you see other solutions?
  • #12 16275133
    meio.gordo
    Level 8  
    stachu_18 wrote:
    Otherwise - how to enable any listening session without the possibility of copying, without user control, e.g. remotely.
    Do you see other solutions?


    It's not possible. You can always put the digital recorder and record the sound.
  • #13 16275137
    stachu_18
    Level 13  
    We can skip such combinations and limit ourselves to typical copying activities.
  • #14 16275175
    meio.gordo
    Level 8  
    Without giving details, nothing more can be said.
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Topic summary

The discussion revolves around methods to protect data on SD and MicroSD cards from copying while still allowing playback, particularly for MP3 files. A mechanical write-protect switch on SD cards is mentioned, but it only prevents writing, not reading. Users explore alternatives such as using Transcend cards with encryption features, creating NTFS partitions with restricted access rights, and the impracticality of these methods for portable media. The consensus is that if files are readable, they can be copied, and encryption combined with custom playback solutions is suggested as a more secure approach. However, it is acknowledged that complete prevention of copying during playback is virtually impossible due to the potential for external recording devices.
Summary generated by the language model.
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