there is two keys for every sector for a few reasons, the main being that two keys allows for diversified access, you can change the access bits to be read/write/increase/decrease at either or both keys. it allows for better protection when you need 2 keys instead of one to access as it does eliminate some of the known attacks out there.

I personally started just with the Flipper Zero. It could read tags, emulate them (turns out not completely) and attack them with wordlists. But I ran into the situation that I was not able to get all keys with the attacks available from the Flipper (or where is simply failed the attacks), and it also lacks support (as of now) to be used with nfc-tools or pm3.

So I also bought myself a Proxmark3 easy, to carry out some more attacks.




Flipper Zero Keys Download