20130087614 | AUDIO JACK COUPLED SECURE MAGNETIC CARD READER - Audio jack coupled secure magnetic card readers in accordance with embodiments of the invention are described. One embodiment includes reading data from at least one track of data encoded on a magnetic stripe using a magnetic read head, encrypting the data using an encryption circuit, encoding the encrypted data into a transmission format using an encoder, passing the encoded data through an anti-aliasing filter to generate a data signal, and transmitting the data signal. on the microphone channel of an audio jack. | 04-11-2013 |