Cards and devices with magnetic emulators for communicating with magnetic stripe readers and applications for the same

摘要

A credit card is provided that may include a credit card number, where at least a portion of the credit card number changes periodically. A magnetic emulator and/or magnetic stripe encoder may be provided to communicate at least a portion of the information needed to complete a credit card transaction to a credit card reader. A magnetic stripe emulator may communicate data serially and may comprise a coil having a soft-magnetic material as well as a permanent magnet. Dynamic magnetic information may be utilized to provide a variety of credit, debit, gift, and loyalty cards.