Application of cashless technology has increasingly become prevalent and mature across the world. It is obvious that customers are getting more and more convenient for both online and traditional shopping. However, everything has advantages and drawbacks. A cashless technology has made people more easier to make payments by clicking buttons on your smartphone, instead of waiting for change. What people need to bring along with is their electronic devices only, rather than their wallets. However, there is a safety issue that users need to take into account. As users are commonly required to link up their bank accounts or credit cards with their phones before enjoying the cash-free environment. Let’s imagine what if your phones are stolen by someone or you lose it by accident.