Secure PIN entry device
First Claim
1. A secure PIN entry method comprising:
- receiving a PIN from a user at a PIN entry assembly, said PIN entry assembly including a first plurality of key pads and a second plurality of bug sensing floods, electrically insulated from and adjacent to said first plurality of key pads; and
checking at least part of said PIN entry assembly for the presence of an unauthorized PIN eavesdropping element thereat and providing an output indicating whether a predetermined security check has been successfully completed,said checking comprising employing bug detection circuitry for checking said at least part of said PIN entry assembly for the presence of an unauthorized PIN eavesdropping element thereat,said employing said bug detection circuitry including;
simultaneously generating an electromagnetic field at at least some of said first plurality of key pads and said second plurality of bug sensing floods; and
sensing mutual capacitance between some of said first plurality of key pads and said second plurality of bug sensing floods and others of said first plurality of key pads and said second plurality of bug sensing floods resulting from said electromagnetic field thereat, said sensing mutual capacitance being operative in a key entry detection mode using autotuning circuitry and in a security scan mode not using autotuning circuitry.
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Accused Products
Abstract
A secure PIN entry device including a PIN entry assembly operative to receive a PIN from a user, a PIN entry prompter operative when actuated to prompt a user to enter a PIN via the PIN entry assembly, a PIN entry prompt security check enabled controller operative to prevent operation of the PIN entry prompter unless a predetermined security check has been successfully completed and security check functionality operative to check at least part of the PIN entry device for the presence of an unauthorized PIN eavesdropping element thereat and to provide an output to the PIN entry prompt security check enabled controller indicating whether the predetermined security check has been successfully completed.
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Citations
15 Claims
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1. A secure PIN entry method comprising:
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receiving a PIN from a user at a PIN entry assembly, said PIN entry assembly including a first plurality of key pads and a second plurality of bug sensing floods, electrically insulated from and adjacent to said first plurality of key pads; and checking at least part of said PIN entry assembly for the presence of an unauthorized PIN eavesdropping element thereat and providing an output indicating whether a predetermined security check has been successfully completed, said checking comprising employing bug detection circuitry for checking said at least part of said PIN entry assembly for the presence of an unauthorized PIN eavesdropping element thereat, said employing said bug detection circuitry including; simultaneously generating an electromagnetic field at at least some of said first plurality of key pads and said second plurality of bug sensing floods; and sensing mutual capacitance between some of said first plurality of key pads and said second plurality of bug sensing floods and others of said first plurality of key pads and said second plurality of bug sensing floods resulting from said electromagnetic field thereat, said sensing mutual capacitance being operative in a key entry detection mode using autotuning circuitry and in a security scan mode not using autotuning circuitry. - View Dependent Claims (2, 3, 4, 5, 14, 15)
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6. A secure data entry method comprising:
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receiving data from a user at a data entry assembly, said data entry assembly including multiple elements including a first plurality of key pads and a second plurality of bug sensing floods, electrically insulated from and adjacent to said first plurality of key pads; preventing receipt of said data by said data entry assembly unless a predetermined security check has been successfully completed; and checking at least part of said data entry method for the presence of an unauthorized data eavesdropping element thereat by sensing mutual capacitance of at least one of said bug sensing floods with at least another element of said data entry assembly and providing an output indicating whether said predetermined security check has been successfully completed, said mutual capacitance sensing being operative in a key entry detection mode using autotuning circuitry and in a security scan mode not using autotuning circuitry. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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Specification