PORTABLE KEY DEVICE AND DEVICE CONTROL METHOD

摘要

Two portable key devices are prepared with a wireless communication function enabling communication between the two devices being installed in the devices, and when the biometric authentication is successful, an authentication success text is saved and an unlock signal is emitted, thus the unlocking and enabling operation of the device is controlled. When wireless communication between two portable key devices is interrupted, the biometric authentication success context is discarded, the unlock signal is no longer emitted, and biometric authentication is required to emit the unlock signal again. Thus, the number of biometric authentications required of a user is reduced, and use by another person is limited by discarding the authentication success context when, for example, the key device is accidentally left behind, thereby improving both ease of use and safety.

主权项

1. A portable key device for performing wireless communication with a control object device to release restriction on use, comprising:
a first key device and a second key device configured to perform wireless communication mutually; a communication unit configured to perform wireless communication with another device; and a biometric authentication context saving unit configured to save a biometric authentication success context, wherein while the communication unit communicates with the first key device and the second key device, the biometric authentication context saving unit receives and saves therein the biometric authentication success context, the communication unit emits a release signal for releasing the restriction on use of the control object device, when the biometric authentication context saving unit saves the biometric authentication success context, and when the communication unit detects no communication between the first key device and the second key device, the biometric authentication context saving unit discards the biometric authentication success context and, when the communication unit detects no communication with the control object device, the biometric context authentication saving unit continues to save the biometric authentication success context without discarding the biometric authentication success context, and the communication unit stops emission of the release signal when the biometric authentication success context is discarded.