Security device for decoding compressed encrypted data has safe microcircuit in magnetic card separate from case and also includes decompression circuits

摘要

The receiving device (M) has a case with a slit for a magnetic smart card and has a number of decoding circuits (r3-r5). Data from the receiving antenna passes to a decompression circuit (r2). Signals then pass to a circuit (r1) for conversion and presentation of signals. The signals to be received may be produced by a transmitter with a signal producing circuit (e1) connected to a compressor (e2), a data packet separation circuit (e3) and a packet decoding circuit (e4) which may be connected to a transmitting antenna.