Abstract: A method for confirming pairing connection of terminal devices, including: acquiring third touch slide data collected by a target second Bluetooth device via a touch sensing point thereof, if a touch slide operation is detected after a connection between the first Bluetooth device and the target second Bluetooth device is established; establishing a third touch slide variation curve device according to the third touch slide data; acquiring fourth touch slide data collected by a touch screen thereof, and establishing a fourth touch slide variation curve according to the fourth touch slide data; determining whether the third touch slide variation curve matches with the fourth touch slide variation curve or not; and disconnecting the connection with the target second Bluetooth device if the third touch slide variation curve does not match with the fourth touch slide variation curve.

Abstract: A control system based on dynamic password and USBKEY including a dynamic password control chip, a USB control chip, a USB interface, a battery, and a detection circuit. The detection circuit is configured to output a detection signal to the dynamic password control chip when it is detected that the USB interface is connected with an external device; the dynamic password control chip is configured to enter a sleep mode when receiving a detection signal; the battery is configured to supply power to the dynamic password control chip and to reduce the power supplied to the dynamic password control chip when the dynamic password control chip enters the sleep mode.

Abstract: An NFC card emulation device including a button press confirmation circuit, a time-out determination unit, and a control circuit. The time-out determination unit is formed by adopting discrete components, such as, the second diode, the second resistor, the first resistor and the first capacitor, etc. When the NFC card emulation device approaches the card reader, the card reader supplies energy to the NFC card emulation device and charges the first capacitor by the control circuit, and when the NFC card emulation device is removed from the card reader, the control circuit realizes the timing function by the first capacitor; if, within the timing period, it is determined that the button press confirmation has been performed, it is determined that the button press confirmation is valid. Such a time-out determination unit has a simple structure and a low cost.