ISO here, ITU-T that, IETF, ... blah blah

I was recently exploring about a QR payment method in Indonesia, "QRIS", which happens to be using the EMVCo QR Code spec. It was a little deeper, then I met the dragons..

One of them is ASN.1 scheme (some say it is protobuf on steroids) that is often used for TLS certificates ([x.509]()? (did not finish reading it)).