Q$2.$ Give a design outline for a portable system of cashless payment that can take user$$s data input

and send those values to a centralized data centre. For example a system to enter small set of data

items consisting of both numeric and alphanumeric values say AADHAAR number, PAN card number,

Transaction amount and send that data to a remote data centre in a secure manner in real time

without failure.

$$ What kind of user interface device will be suitable for this kind of system? Considering the

system demands quick response time and easy to use without any prior training. $[5]$

$$ Give a block level design for such system? $[10]$

$$ Which network interface protocol will be suitable for such system, why? $[5]$

$$ How will you ensure that the data is secure while sending it on the network? $[5]$