I think module is not one of the theee basic structure
Honestly, just google this please... but because I'm eating a cookie here you go...
<span>Deposit in your own account using your debit card:</span><span>Insert debit card and enter PIN for validation.Select account type (Saving or Current).<span>Place the money in the cash deposit slot and click “Continue”.</span><span>Machine will sort the cash and will show denomination-wise amount to be deposited.</span><span>If correct, click “Deposit”.
or this website
http://www.uandblog.com/How-To-Deposit-Money-In-A-Cash-Deposit-Machine
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The server should be able to block unauthorized access, a good firewall but still, enable those authorized to have an access. However, there should be security on vulnerable parts of the system that may lead to corruption and easy access to data thieves.