Android Based Client - Server Mobile Ordering System(repost)

Hi There This is a request for you to provide the system requirements/outlay and required development - being coding, documentation to provide a POC phase. The POC will need to demonstrate the ability to request a product from the server and then print the values on the printer attached to the Phone/Tablet. I need to create a secure data connection to a web server, and the data needs to be encrypted. The end user device will be Linux based with GSM Connectivity and we are hoping to use a Android based front end on the device. The device will be one of either a POS handheld unit or a Kiosk, both will have a thermal printer. a: We need to ensure a secure connection, basically like the Banks provide. B: The data must be encrypted. C: The user device will need to have a menu driven app, basically about 5 forms. Sale Voucher, Purchase Vouchers, Reports and System(Data Connection configuration). D: The user device app will need to decrypt the token and print. (Reprint last) The above is a highlevel project overview, and as such further investigations will be required. Thanks Celliware