What’s What
RFID uses radio waves to transmit information wirelessly by way of a data-containing device with a silicon chip and an antenna, and a reader with an antenna that captures the data when the device is within its range. Smart card technology involves an embedded integrated circuit that can be either a secure microcontroller, an equivalent intelligence with internal memory or a memory chip alone. Contact smart cards connect to readers with direct physical contact, while contactless smart cards communicate with readers through remote radio frequency interfaces. There are also versions containing both, called dual interface cards. Contactless cards require only close proximity to readers, and are ideal for applications demanding a very fast card interface—for instance, building entry, transit passes and low-value payment purposes. Smart cards with embedded microcontrollers can store large amounts of data and interact intelligently with smart card readers for high-security applications. Smart cards with memory chips are ideal for low and medium security applications.
- People:
- Randy Vanderhoof
- Places:
- Princeton Junction