Method of Dynamically Encrypting Fingerprint Data and Related Fingerprint Sensor
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United States of America Patent
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Issued Date -
Jul 7, 2016
app pub date -
Jan 6, 2016
filing date -
Jan 7, 2015
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Abstract
A dynamic encryption type fingerprint sensor includes a capacitive array sensing fingerprints and producing fingerprint data, an embedded non-volatile memory (eNVM) storing a one-time code (OTC) and an encryption algorithm indicator, and a logic algorithm circuit encrypting the fingerprint data produced by the capacitive array according to the OTC and the encryption algorithm indicator. The logic algorithm circuit includes an encryption circuit having a plurality of logic encryption circuits selected using the encryption algorithm indicator, the encryption circuit encrypting the fingerprint data using selected logic encryption circuits of the plurality of logic encryption circuits according to the OTC. A control circuit is used for controlling operation of the capacitive array, the eNVM, and the logic algorithm circuit.
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