ICカードIC Card

Learn in the textbookUser Authentication (Knowledge-Based and Possession-Based)

DefinitionAn IC card (ICカード) has a built-in IC chip that can store and process information, and is used for possession-based authentication, where holding the card is the proof of identity.

ExplanationBecause the chip can carry out cryptographic processing itself, its contents are harder to read or copy than those of a card that stores data only on a magnetic stripe. IC cards are often used as employee badges or building passes, and a lost or stolen card must be disabled right away.

AnalogyIt is like a house key: whoever holds it is treated as a resident, so if you lose it, the lock has to be changed.

Memory hookIC stands for integrated circuit, meaning there is a tiny computer inside the card.

Learn in the textbookInformation Systems for Distribution and Retail

DefinitionAn IC card (ICカード) is a plastic card with an embedded IC chip, which can not only store information but also carry out processing such as encryption.

ExplanationIC stands for integrated circuit, a tiny chip that combines storage and processing. Cards are read either by the contact type, whose terminals touch the device, or by the contactless type, which talks to a reader by radio waves when simply held near it. The contactless type relies on the RFID mechanism for identifying things by radio, and it is widely used for transit passes and electronic money.

AnalogyWhere a magnetic card is like a note anyone can read, an IC card is like carrying a small safe that opens only for someone who knows the password.

Memory hookIC is the initials of Integrated Circuit. Picture a tiny computer living inside the card, and you will remember that it can process data.