Forum › MIFARE SDK › How to guarantee the operation has been done to card › Reply To: How to guarantee the operation has been done to card
Hi,
“connection lost” means the card was removed from the reader? This may occurs in the end users use case. But in this scenario you will never change a key!
Changing one of the keys is part of the personalization process in the issuer’s office. Here the card is properly connected until all tasks are done. When we exclude a “tear-down” issue (removing the card) then an error occurs at the change key operation. He it is useful to know the error number.
If the DESFire is connected and selected with the reader, a session starts, maybe encrypted with a session key. This session stay until an error occurs or the reader deselect the card. You cannot pick-up a previous and continue for security reasons.
Kind regards,
The MIFARE Team
“connection lost” means the card was removed from the reader? This may occurs in the end users use case. But in this scenario you will never change a key!
Changing one of the keys is part of the personalization process in the issuer’s office. Here the card is properly connected until all tasks are done. When we exclude a “tear-down” issue (removing the card) then an error occurs at the change key operation. He it is useful to know the error number.
If the DESFire is connected and selected with the reader, a session starts, maybe encrypted with a session key. This session stay until an error occurs or the reader deselect the card. You cannot pick-up a previous and continue for security reasons.
Kind regards,
The MIFARE Team
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