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  1. #1
    Nokia Developer Champion
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    key changed after writing SMS to card from phone

    There was some data written on mifair RFID card after that i shared some messages one by one to card now the it seems keys have changed to 0 to 6 sector. can some one tell me what could be key of it now ? Did phone may changed key ? I used Nokia 6212 Classic.
    Last edited by honest_success; 2009-06-26 at 11:51.

  2. #2
    Nokia Developer Champion
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    Re: key changed after writing SMS to phone

    No Reply ????????

  3. #3
    Registered User
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    Oct 2006
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    182

    Re: key changed after writing SMS to phone

    i shared some messages one by one to card now the it seems keys have changed to 0 to 6 sector.
    what do you mean by that question. please elaborate your problem

    Regards,
    Sunil

  4. #4
    Nokia Developer Champion
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    915

    Re: key changed after writing SMS to phone

    Quote Originally Posted by esunilkumare View Post
    what do you mean by that question. please elaborate your problem

    Regards,
    Sunil
    As you should know that we can share text messages of the phone with RFID card. Right ? I shared it and now my co worker who want to read data from that card by c#.net is not able to read data from it.

    What could be the issue ? so he is telling the keys has been changed. So do you agree ? if keys of that sector and blocks changed then can we know the changed key ?

  5. #5
    Registered User
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    Oct 2006
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    182

    Re: key changed after writing SMS to phone

    yes.... you can write messages to external tag. but this process changes the default keys. refer the following links


    Programming with Nokia 6131 NFC changes the keys. There are essentially 2 keys used for reading NDEF tags:
    - keys used for the MAD area, which are: A0A1A2A3A4A5 (sector 0)
    - keys used for the NDEF area, which are: D3F7D3F7D3F7 (sectors 1-n)


    from,

    Trikker-1k tags' default keys


    What are the keys used with the Mifare NDEFTagConnection?

    There are essentially 2 keys used for reading NDEF tags:

    - keys used for the MAD area, which are: A0A1A2A3A4A5

    - keys used for the NDEF area, which are: D3F7D3F7D3F7

    from
    Nokia 6131 NFC - FAQs
    this may be helpful to you

    Preventing write-access to NFC tag

    Regards,
    Sunil

  6. #6
    Nokia Developer Champion
    Join Date
    Sep 2007
    Posts
    915

    Re: key changed after writing SMS to phone

    Quote Originally Posted by esunilkumare View Post
    yes.... you can write messages to external tag. but this process changes the default keys. refer the following links






    this may be helpful to you

    Preventing write-access to NFC tag

    Regards,
    Sunil
    Thanks sunil for your every time support. I used 6212 Classic to write on device. Will there be any change in keys ? Can you tell me the difference between MAD and NDEF area ?

  7. #7

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