TNG is based on mifare classic, which actually does have encryption, but the encryption method has been broken since like 10 years ago. You can easily bruteforce the first encryption key by using tool like mfcuk and then mfoc to get the rest offline. With all the encryption keys on hand, you can then use mct(the android app used by the stupid couple) to manipulate your TNG card as much as you want.

That is why all the places you can use TnG to make payment has CCTV

Anyone know if NU sentral parking is free for first 15 minutes(during weekend)? Plan to do a quick run to reload via amex.