Category "banking"

Java - ATM Banking login with 3 times try pin lock

I'm new to java programming. I'm trying to make a banking system log-in that locks the user after entering the wrong pin 3 times. I'm trying to merge 2 pieces o

Does host should increase ATC (Application Transaction Counter) (EMV tag 9F36) after unsuccessful transaction?

The host update the ATC after success transaction and the counter on the ICC and in the host DB is the same in this moment. But, does host should increase/upda