Automatic Redemption of Free Parking in Shopping Malls

Many shopping malls provide free parking service to attract customers because car owners usually have high spending power. Typically a customer is entitled to free parking after spending a certain amount in the shopping mall and he redeems free parking by presenting the sales receipts to a staff in a service counter. The staff manually processes these sales receipts (e.g., checks the date and calculates the total amount of spending) and redeems the corresponding number of free parking hours to the customer. In this project, we apply QR code and digital signature to automate the process of redeeming free parking in shopping malls. This brings convenience to the customers and cost saving to the shopping malls.