SD cards and CPRM protection












3















Before buying an SD memory card, I'd like to know something more about the CPRM protection, in particular:




  • Does CPRM influence the way I am supposed to access my own data? That is, does CPRM encrypt it? Could CPRM prevent me from accessing my own data?

  • Is it possible to disable or eliminate CPRM from either the memory card or the card reader?

  • Are there manufacturers selling CPRM-free SD memory cards?

  • Is there any real alternative to CPRM-protected SD memory cards beside USB flash drives?

  • Is Linux support for SD cards good?


Thanks.










share|improve this question























  • I haven't dealt with this but there are some related questions at the SD Assocation FAQ that might help.

    – fideli
    Apr 19 '10 at 15:54
















3















Before buying an SD memory card, I'd like to know something more about the CPRM protection, in particular:




  • Does CPRM influence the way I am supposed to access my own data? That is, does CPRM encrypt it? Could CPRM prevent me from accessing my own data?

  • Is it possible to disable or eliminate CPRM from either the memory card or the card reader?

  • Are there manufacturers selling CPRM-free SD memory cards?

  • Is there any real alternative to CPRM-protected SD memory cards beside USB flash drives?

  • Is Linux support for SD cards good?


Thanks.










share|improve this question























  • I haven't dealt with this but there are some related questions at the SD Assocation FAQ that might help.

    – fideli
    Apr 19 '10 at 15:54














3












3








3








Before buying an SD memory card, I'd like to know something more about the CPRM protection, in particular:




  • Does CPRM influence the way I am supposed to access my own data? That is, does CPRM encrypt it? Could CPRM prevent me from accessing my own data?

  • Is it possible to disable or eliminate CPRM from either the memory card or the card reader?

  • Are there manufacturers selling CPRM-free SD memory cards?

  • Is there any real alternative to CPRM-protected SD memory cards beside USB flash drives?

  • Is Linux support for SD cards good?


Thanks.










share|improve this question














Before buying an SD memory card, I'd like to know something more about the CPRM protection, in particular:




  • Does CPRM influence the way I am supposed to access my own data? That is, does CPRM encrypt it? Could CPRM prevent me from accessing my own data?

  • Is it possible to disable or eliminate CPRM from either the memory card or the card reader?

  • Are there manufacturers selling CPRM-free SD memory cards?

  • Is there any real alternative to CPRM-protected SD memory cards beside USB flash drives?

  • Is Linux support for SD cards good?


Thanks.







linux sd-card






share|improve this question













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asked Apr 19 '10 at 8:55









Francesco TurcoFrancesco Turco

271146




271146













  • I haven't dealt with this but there are some related questions at the SD Assocation FAQ that might help.

    – fideli
    Apr 19 '10 at 15:54



















  • I haven't dealt with this but there are some related questions at the SD Assocation FAQ that might help.

    – fideli
    Apr 19 '10 at 15:54

















I haven't dealt with this but there are some related questions at the SD Assocation FAQ that might help.

– fideli
Apr 19 '10 at 15:54





I haven't dealt with this but there are some related questions at the SD Assocation FAQ that might help.

– fideli
Apr 19 '10 at 15:54










2 Answers
2






active

oldest

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0















  • I use OpenBSD and Linux primarily with SD cards and never have seen any sort of copy protection at the hardware level. I would assume that it requires certain programs. For instance if you told xTunes to write out a DRM-ripped CD to the SD card, then it may try to trigger the CPRM bits.

  • I have no idea.

  • Apparently Super Digital lacks support for CPRM according to Wikipedia http://en.wikipedia.org/wiki/Secure_Digital_card

  • There is always things like CF and other such card media.

  • Very good.


Bottom line is, I think only certain programs even care about the CPRM. To be honest I don't understand how it works because it is assumingly filesystem-agnostic. How it tracks the file and such is unknown to me. In my experience I have never had any kind of problems with copy protection on SD cards and was not even aware that they had any sort of DRM technology.






share|improve this answer































    0














    I'm on mobile so i will be brief. i know of no way in Linux to access the secure api of a sd card.



    It does work on the hardware level, not fs.



    Read the wikipedia entry. There are 3 modes. Open, pass (16bits) protected, read-only.



    There's no protection on brute force, as far as i can tell.



    If I'm not mistaken, this is what blackberry, Android and windows phones use to encrypt your sd card data.



    So, answer is No. Unless you (or a rogue application on the devices you use the card in) sets up a password.



    Eralz is spot on about SuperDigital






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      2 Answers
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      2 Answers
      2






      active

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      active

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      active

      oldest

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      0















      • I use OpenBSD and Linux primarily with SD cards and never have seen any sort of copy protection at the hardware level. I would assume that it requires certain programs. For instance if you told xTunes to write out a DRM-ripped CD to the SD card, then it may try to trigger the CPRM bits.

      • I have no idea.

      • Apparently Super Digital lacks support for CPRM according to Wikipedia http://en.wikipedia.org/wiki/Secure_Digital_card

      • There is always things like CF and other such card media.

      • Very good.


      Bottom line is, I think only certain programs even care about the CPRM. To be honest I don't understand how it works because it is assumingly filesystem-agnostic. How it tracks the file and such is unknown to me. In my experience I have never had any kind of problems with copy protection on SD cards and was not even aware that they had any sort of DRM technology.






      share|improve this answer




























        0















        • I use OpenBSD and Linux primarily with SD cards and never have seen any sort of copy protection at the hardware level. I would assume that it requires certain programs. For instance if you told xTunes to write out a DRM-ripped CD to the SD card, then it may try to trigger the CPRM bits.

        • I have no idea.

        • Apparently Super Digital lacks support for CPRM according to Wikipedia http://en.wikipedia.org/wiki/Secure_Digital_card

        • There is always things like CF and other such card media.

        • Very good.


        Bottom line is, I think only certain programs even care about the CPRM. To be honest I don't understand how it works because it is assumingly filesystem-agnostic. How it tracks the file and such is unknown to me. In my experience I have never had any kind of problems with copy protection on SD cards and was not even aware that they had any sort of DRM technology.






        share|improve this answer


























          0












          0








          0








          • I use OpenBSD and Linux primarily with SD cards and never have seen any sort of copy protection at the hardware level. I would assume that it requires certain programs. For instance if you told xTunes to write out a DRM-ripped CD to the SD card, then it may try to trigger the CPRM bits.

          • I have no idea.

          • Apparently Super Digital lacks support for CPRM according to Wikipedia http://en.wikipedia.org/wiki/Secure_Digital_card

          • There is always things like CF and other such card media.

          • Very good.


          Bottom line is, I think only certain programs even care about the CPRM. To be honest I don't understand how it works because it is assumingly filesystem-agnostic. How it tracks the file and such is unknown to me. In my experience I have never had any kind of problems with copy protection on SD cards and was not even aware that they had any sort of DRM technology.






          share|improve this answer














          • I use OpenBSD and Linux primarily with SD cards and never have seen any sort of copy protection at the hardware level. I would assume that it requires certain programs. For instance if you told xTunes to write out a DRM-ripped CD to the SD card, then it may try to trigger the CPRM bits.

          • I have no idea.

          • Apparently Super Digital lacks support for CPRM according to Wikipedia http://en.wikipedia.org/wiki/Secure_Digital_card

          • There is always things like CF and other such card media.

          • Very good.


          Bottom line is, I think only certain programs even care about the CPRM. To be honest I don't understand how it works because it is assumingly filesystem-agnostic. How it tracks the file and such is unknown to me. In my experience I have never had any kind of problems with copy protection on SD cards and was not even aware that they had any sort of DRM technology.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Aug 23 '10 at 6:43









          EarlzEarlz

          2,405165279




          2,405165279

























              0














              I'm on mobile so i will be brief. i know of no way in Linux to access the secure api of a sd card.



              It does work on the hardware level, not fs.



              Read the wikipedia entry. There are 3 modes. Open, pass (16bits) protected, read-only.



              There's no protection on brute force, as far as i can tell.



              If I'm not mistaken, this is what blackberry, Android and windows phones use to encrypt your sd card data.



              So, answer is No. Unless you (or a rogue application on the devices you use the card in) sets up a password.



              Eralz is spot on about SuperDigital






              share|improve this answer




























                0














                I'm on mobile so i will be brief. i know of no way in Linux to access the secure api of a sd card.



                It does work on the hardware level, not fs.



                Read the wikipedia entry. There are 3 modes. Open, pass (16bits) protected, read-only.



                There's no protection on brute force, as far as i can tell.



                If I'm not mistaken, this is what blackberry, Android and windows phones use to encrypt your sd card data.



                So, answer is No. Unless you (or a rogue application on the devices you use the card in) sets up a password.



                Eralz is spot on about SuperDigital






                share|improve this answer


























                  0












                  0








                  0







                  I'm on mobile so i will be brief. i know of no way in Linux to access the secure api of a sd card.



                  It does work on the hardware level, not fs.



                  Read the wikipedia entry. There are 3 modes. Open, pass (16bits) protected, read-only.



                  There's no protection on brute force, as far as i can tell.



                  If I'm not mistaken, this is what blackberry, Android and windows phones use to encrypt your sd card data.



                  So, answer is No. Unless you (or a rogue application on the devices you use the card in) sets up a password.



                  Eralz is spot on about SuperDigital






                  share|improve this answer













                  I'm on mobile so i will be brief. i know of no way in Linux to access the secure api of a sd card.



                  It does work on the hardware level, not fs.



                  Read the wikipedia entry. There are 3 modes. Open, pass (16bits) protected, read-only.



                  There's no protection on brute force, as far as i can tell.



                  If I'm not mistaken, this is what blackberry, Android and windows phones use to encrypt your sd card data.



                  So, answer is No. Unless you (or a rogue application on the devices you use the card in) sets up a password.



                  Eralz is spot on about SuperDigital







                  share|improve this answer












                  share|improve this answer



                  share|improve this answer










                  answered Mar 28 '13 at 6:49









                  gcbgcb

                  1,60763359




                  1,60763359






























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