Method for conducting a transaction between a magnetic stripe reader and an electronic card

• US 8,302,871 B2
• Filed: 04/16/2012
• Issued: 11/06/2012
• Est. Priority Date: 03/26/2005
• Status: Active Grant

• Current Assignee: Privasys Incorporated
• Original Assignee: Privasys Incorporated
• Inventors: Poidomani, Mark, Ziegler, Joan, Foo, Eric, Alon, Ziv, McGuire, Charles, Routhenstein, Lawrence
• Primary Examiner(s): VO, TUYEN KIM
• Application Number:
  US13/448,256
• Publication Number:
  US 20120235797A1
• Time in Patent Office: 204 Days
• Field of Search: 235/380, 235/449, 235/451, 235/492, 235/493
• US Class Current: 235/492
• CPC Class Codes: G06K 19/0702 the arrangement including a battery
• CPC Class Codes: G06K 19/077 Constructional details, e.g. mounting of circuits in the carrier
• CPC Class Codes: G06K 19/07722 the record carrier being multilayered, e.g. laminated sheets flat articles in general, see B32B37/00

Abstract

A method for communicating with a magnetic stripe reader in which an electronic apparatus is activated from an off state to a reduced power mode, a magnetic stripe reader is detected, then the apparatus is activated from the reduced power mode to a full power mode and it broadcasts a signal that contains a transaction specific data packet that is read by the magnetic read head. The signal is a time varying and spatial varying magnetic field that is interpreted by the magnetic read head as originating from a standard magnetic stripe and it is generated by a magnetic stripe broadcaster comprised of a track 1 flex encoder that transmits data that is read by a track 1 read head of the magnetic read head and a track 2 magnetic flex encoder that transmits data that is read by a track 2 read head of the magnetic read head.

Claims

1. A method for communicating with a magnetic stripe reader having a magnetic read head, comprising the steps of:

activating an electronic apparatus from an off state to a reduced power mode;

detecting the magnetic stripe reader;

activating the electronic apparatus from the reduced power mode to a full power mode after detection of the magnetic read head; and

broadcasting a signal that contains a transaction specific data packet that is read by the magnetic read head;

wherein the signal is a time varying and spatial varying magnetic field that is interpreted by the magnetic read head as originating from a standard magnetic stripe; and

wherein the signal is generated by a magnetic stripe broadcaster comprised of a track 1 flux encoder that transmits data that is read by a track 1 read head of the magnetic read head and a track 2 magnetic flux encoder that transmits data that is read by a track 2 read head of the magnetic read head.

2. The method of claim 1 wherein the transaction specific data packet contains a dynamically generated data packet that is generated after the electronic apparatus is activated from the off state.

3. The method of claim 1 wherein the magnetic stripe broadcaster is further comprised of a cancellation structure for reducing cross-contamination cross-talk of the signal.

4. The method of claim 3 wherein the track 1 flux encoder is comprised of a track 1 magnetic stripe broadcaster coil and the track 2 flux encoder is comprised of a track 2 magnetic stripe broadcaster coil.

5. The method of claim 4 wherein each of the track 1 magnetic stripe broadcaster coil and the track 2 magnetic stripe broadcaster coil are comprised of a ferromagnetic core, an insulator and a wound coil for flux amplification and control and there is no short between the ferromagnetic core and the wound coil.

6. The method of claim 5 wherein the ferromagnetic core is comprised of a HY-MU 80 alloy.

7. The method of claim 4 wherein each of the track 1 magnetic stripe broadcaster coil and the track 2 magnetic stripe broadcaster coil are comprised of a ferromagnetic core, a plurality of coils produced through a manufacturing process other than winding a coil about the ferromagnetic core, and an insulation that prevents a short between the plurality of coils and the ferromagnetic core.

8. The method of claim 4 wherein phase and amplitude corrections are used to cancel out data broadcast from the track 1 magnetic stripe broadcaster coil so that it is not read by the track 2 read head of the magnetic read head.

9. The method of claim 8 wherein phase and amplitude corrections are used to cancel out at least some data broadcast from the track 2 magnetic stripe broadcaster coil so that it is not read by the track 1 read head of the magnetic read head.

10. The method of claim 4 wherein phase and amplitude corrections are used to cancel out at least some data broadcast from the track 2 magnetic stripe broadcaster coil so that it is not read by the track 1 read head of the magnetic read head.

11. The method of claim 4 wherein a track 1 helper broadcaster coil is used to cancel out at least a portion of a track 2 induced signal from the track 1 magnetic stripe broadcaster coil and a track 2 helper broadcaster coil is used to cancel out at least another portion of a track 1 induced signal from the track 2 magnetic stripe broadcaster coil.

12. The method of claim 3 wherein the cancellation structure is comprised of a linear RC circuit.

13. The method of claim 1 wherein the signal is generated by a magnetic stripe broadcaster that is driven by a formatted data signal generated by a microprocessor formatted to represent an Aiken double frequency data of an encoded magnetic strip and the magnetic stripe broadcaster generates a time varying voltage in the magnetic read head that is decoded by one or more decoding circuits into binary bits of data as if the binary bits of data had come from a static magnetic stripe.

14. An electronic apparatus, comprising:

a microprocessor that dynamically generates a transaction specific data packet;

a broadcaster that can broadcast a signal that contains the data packet; and

a cancellation structure

wherein the signal is a time varying and spatial varying magnetic field that is interpreted by a magnetic read head of a magnetic stripe reader as originating from a standard magnetic stripe;

wherein the broadcaster is comprised of a track 1 flux encoder that transmits data that is read by a track 1 read head of the magnetic read head and a track 2 magnetic flux encoder that transmits data that is read by a track 2 read head of the magnetic read head; and

wherein the cancellation structure reduces cross-contamination cross-talk caused by the track 1 and track 2 read heads.

15. The electronic apparatus of claim 14 wherein the electronic apparatus is a card compliant with a CR80 format, the track 1 flux encoder is comprised of a track 1 magnetic stripe broadcaster coil, the track 2 flux encoder is comprised of a track 2 magnetic stripe broadcaster coil, and the cancellation structure is comprised of a track 1 helper broadcaster coil used to cancel out a track 2 induced signal from the track 1 magnetic stripe broadcaster coil and a track 2 helper broadcaster coil used to cancel out a track 1 induced signal from the track 2 magnetic stripe broadcaster coil.