Strangely, to decrypt the data off the passport you need the passport number, the date of birth, and the expiry date. I assume this is why that playstore app needs to get a photo of your passport. Sure enough, my phone could read off other details about me including my photo after a few seconds of reading.

Never knew how it worked before, and assumed it was like how mifare DESfire cards work since the bytes I got from a simple reader app were different every time. (I assume that's done so you can't wirelessly ID people using their passports)