NFC ramblings

[dydey90]

Just having a night shift debate on NFC chips. My work pass card appears to have one for use in vending machines/canteen. People have complained that their phone battery is drained rapidly if they keep the card in the same pocket with the NFC communication turned on.

The question is this:
My phone has NFC coms. Card has a balance stored via NFC chip. Theoretically, there may be a way to edit the balance on the card? Expecting a no, but would be nice, legalities aside.
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This post is probably not serious and shouldn't be taken literally.
Past: CBR125,ER6f NINJA 650, ZZR600 Current: VFR750

[CaNsA]

A quick google returns this
https://android.stackexchange.com/questions/35841/can-i-clone-my-mifare-classic-access-card-with-an-android-device

I would like to try it out and explore it a bit further but I don't have anything to test it with.

[bamt]

Does your badge actually store the balance, or is it just an ID that is read by the system which then stores the transaction on a central server?

The former would theoretically be possible to edit - though any half decent implementation would cryptographically sign the balance rather than just storing it as a straightforward number. The latter would potentially allow you to clone a colleagues card, but not add "free money" to your own.

[Im-a-Ridah]

[dydey90]

Having had some sleep and done some readings, I don't think I can do it simply because Apple. iPhones don't use NFC the way it's intended, the phone acts as the card so it doesn't have the capability to communicate with a passive chip.
____________________
This post is probably not serious and shouldn't be taken literally.
Past: CBR125,ER6f NINJA 650, ZZR600 Current: VFR750