Final answer:
The card that the user has, which is credit card-sized and used to prove her identity with a PIN, is called a smart card. A smart card is a type of plastic card that contains a microprocessor chip, which stores and processes data securely.
Step-by-step explanation:
The card that the user has, which is credit card-sized and used to prove her identity with a PIN, is called a smart card. A smart card is a type of plastic card that contains a microprocessor chip, which stores and processes data securely. It can be used for various purposes, such as access control, identification, and payment transactions.