A method and apparatus for authenticating a subject, includes using one or a plurality of biometric measurements for authentication without any sharing of the subject’s biometric data with a party requesting authentication. The DRX phase includes discontinuous time periods for monitoring a downlink control channel from a serving base station. Then, while the vertical position of a nozzle is dynamically adjusted on the basis of the measurement result, and at the same time, the bonded substrate stack is rotated, the bonded substrate stack is separated into two substrates at a porous layer by injecting a fluid ejected from the nozzle. The above constitution of the invention provides the acrylic rubber composition effective for preventing aluminum fixing while retaining the material properties of acrylic rubber and its excellent characteristics.