What is the term for an electronic payment system that uses a plastic card to store digital information?

The term "smart card" refers to an electronic payment system that utilizes a plastic card embedded with an integrated circuit for storing digital information. This card can hold various types of data, including financial information, and can be used for secure transactions by connecting to payment systems. Smart cards enhance security through features like encryption and personal identification numbers, enabling users to complete transactions seamlessly.

In contrast, digital cash, e-cash, and digital wallets are broader concepts that refer to online payment methods but do not specifically involve the use of a physical card with embedded technology. Digital cash and e-cash pertain to virtual currencies or systems enabling online payments without physical representation, while digital wallets are software applications that securely store payment information and passwords for numerous payment methods, allowing users to make electronic transactions online or through mobile devices.