Smart cards usually include which kind of technology for user verification?

Smart cards are specifically designed to enhance security through user verification, and they typically incorporate computer chips that contain authentication data. These chips can store varying amounts of data, depending on the type of smart card, and they often work in conjunction with cryptography. This allows for secure transactions and the ability to verify the identity of the user, making them widely used for secure access in various applications, such as physical access control and secure digital transactions.

The other options represent technologies that are not typically associated with smart cards. Magnetic stripe technology is more common in traditional credit cards and does not offer the same level of security as smart cards. Optical character recognition refers to the process of converting different types of documents into editable and searchable data, which is not relevant to the functionality of smart cards. QR code scanning technology is related to reading visual codes that can store a small amount of information, but it does not provide the embedded security and authentication functions that computer chips within smart cards offer. Therefore, the use of computer chips for storing authentication data is a defining characteristic of smart cards that sets them apart from other verification technologies.