AUTHENTICATION OF DETACHABLE PERIPHERAL DEVICES
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United States of America Patent
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Issued Date -
Feb 16, 2017
app pub date -
Aug 10, 2016
filing date -
Aug 11, 2015
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Abstract
A system and method for enabling an electronic appliance to verify the authenticity of a detachable peripheral device before that peripheral device is used by measuring a controlled impedance of a common wire and returning a proportional value, wherein the host may change or modulate the impedance of the wire before or during each measurement that the peripheral device makes, and if the peripheral device's reported answer matches the expected answer of the host, then the host device may allow the peripheral device to function properly.
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