Add credit to MiFare Classic 1K (?)

NFC
#1

Hi all ^^

I have a MiFareClassic 1K and just want to know (not for doing illegal activities) how it works the system of adding credits.
I know that this mifares were cracked long time ago but, I want to know if the credit is always the same code lines for every card and if that is correct. It could be possible to made an script or something that can run Flipper that adds credit to it? (just curious about how these things work from inside)

Thanks to all and hack the planet!

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#2

My understanding is that transaction may be handled in several different ways. You would need to analyze each individual implementation. It’s likely some act as you expect but there is probably a verification you would need to figure out. It might be something as simple as a check sum.

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