The invention discloses a
fingerprint KEY device, comprising a
chip, a memory, a housing, a power supply, a
fingerprint collecting unit, a
fingerprint verification unit, a modulation and
demodulation module, and an audio plug, wherein the fingerprint collecting unit, the fingerprint
verification unit and the modulation and
demodulation module are connected with the
chip; the audio plug is connected with the modulation and
demodulation module; the
chip has a chip operation
system; the memory is used for storing a private key, a digital
certificate, and a fingerprint template; the audio plug includes an MIC (
microwave integrated circuit) pole and a sound track pole; the modulation and demodulation module is used for converting an analogue data received from the audio plug into a
digital data and then transmitting to the chip, and converting the
digital data to be conveyed by the fingerprint KEY device into the analogue data and then transmitting to the audio plug; and the chip can authorize to use the private key and the digital
certificate in the memory after the fingerprint
verification unit verifies. The fingerprint KEY device replaces PIN code verification with fingerprint verification, and can achieve information interaction of the fingerprint KEY device and
electric equipment with an audio interface through the modulation and demodulation module and the audio plug. Therefore, the security and the reliability of identity
authentication of a user are improved; and meanwhile, the adaptability and the convenience are also enhanced.