User verification device, authentication system and authentication method for security key

An authentication system for a security key, comprising:

• an electronic apparatus;
• and
• a user verification device, comprising:
• a security chip;
• a proximity sensor;
• a connector configured to be connected to the electronic apparatus;
• and
• a microcontroller unit coupled to the security chip, the proximity sensor, and the connector, wherein when the microcontroller unit receives an identity authentication request from the electronic apparatus through the connector, the microcontroller unit determines whether an object is approaching the user verification device through the proximity sensor,
• wherein when the microcontroller unit determines that the object is approaching the user verification device through the proximity sensor, the microcontroller unit reads an identity authentication response from the security chip and outputs the identity authentication response to the electronic apparatus through the connector.

An authentication method for a security key, suitable for a user verification device and an electronic apparatus, wherein the user verification device comprises a connector, a proximity sensor, and a security chip, wherein the authentication method comprises:

• determining whether an object is approaching the user verification device through the proximity sensor when the user verification device receives an identity authentication request from the electronic apparatus through the connector;
• reading an identity authentication response from the security chip when the proximity sensor determines that the object is approaching the user verification device;
• and
• outputting the identity authentication response to the electronic apparatus through the connector.