We try to use a midlet to read external Mifare tag.
We use the interface MFDataArea's read method to read block data.
When we use the method, it's need a key parameter.
The key parameter is plain byte array in our midlet.
How can we to secure the key byte array?
Does it's work if we put it in secure element?
The document of SDK say "If null then the device's default keys are used.".
Can we change default keys? Does it secure?
Please give we a hand. Thank you~