Wrist worn RFID device with security protection and method thereof

A wrist worn RFID device with security protection, comprising:

• a wrist worn body comprising a strap body, a first combined portion, and a second combined portion, the first combined portion and the second combined portion being disposed on two ends of the strap body, wherein when the first combined portion and the second combined portion being fastened together detachably, the wrist worn body is in a shape of a ring;
• a control circuit disposed on the strap body, the control circuit comprising a first connecting end and a second connecting end, the first connecting end being connected to the first combined portion, and the second connecting end being connected to the second combined portion, wherein the first connecting end is electrically connected with the second connecting end when the first combined portion is fastened to the second combined portion, wherein when the control circuit detects that the first connecting end is electrically connected with the second connecting end, the control circuit generates an enable signal;
• a sensing circuit, coupled to the control circuit, wherein when the first connecting end is electrically connected with the second connecting end, the sensing circuit detects a physiological signal of an user, wherein when detecting the physiological signal, the sensing circuit generates a first validation signal;
• a safety circuit, coupled to the control circuit, wherein when the first connecting end is electrically connected to the second connecting end, the safety circuit receives an user information inputted by the user through an user interface to implement an identity verification program, when the inputted user information is accepted by the identity verification program, the safety circuit generates a second validation signal;
• a RFID module, disposed at the wrist worn body, implementing a wireless transmission according to a control signal;
• and
• a processing circuit electrically connected to the control circuit, the sensing circuit, the safety circuit, and the RFID module, wherein the processing circuit controls the operation of the sensing circuit and the safety circuit according to the enable signal, and the processing circuit generates the control signal according to the first validation signal and the second validation signal;
• wherein the RFID device is at a wearing state when the first connecting end is electrically connected to the second connecting end, and the RFID device is at a non-wearing state when the first connecting end is electrically disconnected from the second connecting end, and the RFID module stops implementing the wireless transmission when the wrist worn RFID device is changed from the wearing state to the non-wearing state.