Abdul Salam
Abdul Salam answered question
There are many.   1. Network Issues : Since distributed system will be connected through network and in case of network failure non of the systems will work.   2. Security : The information need to be passed between the network. And it can be tracked and can be used for illegal purpose.
Abdul Salam
Abdul Salam answered question
It is possible to lock the card and go in for a new debit card. For locking the card they will not ask for any personal information.   Or else you need to have your personal information to get your new pin.