Abstract: A secure data transmission device: employs a proprietary arrangement of individualized encodable micro-machined electromagnets embedded in a compact, plastic (or apt substrate) which insulates each electromagnet from one another. The electromagnets mimic the magnetic strip on a credit card, but have the capability to temporarily capture data, and then transmit said data to be read by a magstripe terminal. The electromagnetic device can receive, and momentarily capture a variety of data, depending on which digital data is chosen by user. It then converts that data it to an analog signal, and then by using such components as microphone amplifier, a digital-to-analog converter, and microprocessor in the mobile device, transmits that data to the secure information device, which can write that data to a magnetic card terminal. The secure transmission device can be rewritten over and over again each time the user has a separate transaction, using different transaction data.