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Hi,
first, you can create keys without applications. It is a good practice to use several keys for your purposes and let the master key (key number 0) only for administrative tasks. I recommend to create a key number 1 for the access permissions of your application.
When you want to create a new key, you should authenticate with the new key to proof, you are know the key before change it. This key is used to protect your application. At the end you should change the master key from default to a secret one you only know.
Kind regards,
The MIFARE TEam
first, you can create keys without applications. It is a good practice to use several keys for your purposes and let the master key (key number 0) only for administrative tasks. I recommend to create a key number 1 for the access permissions of your application.
When you want to create a new key, you should authenticate with the new key to proof, you are know the key before change it. This key is used to protect your application. At the end you should change the master key from default to a secret one you only know.
Kind regards,
The MIFARE TEam
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