The present invention provides a hologram recording material which is not required to be subjected to pre-exposure treatment at the time of recording, attains high refractive index change, high sensitivity, low scattering, environment resistance, durability, low dimensional change, and high multiplicity, and is suitable for volume hologram recording. Movement distances, when the first and second shutters are moved simultaneously from the closing positions, of the first and second shutters from the closing positions to the opening positions are different from each other so that after one of said first and second shutters reaches the opening position, the other shutter is moved to the opening position. A lightly doped channel is formed over the buried oxide layer. Next, the battery terminal voltage and current are re-sampled at a low sampling rate. The method continues with the DS processing module discarding the private key to substantially protect the private key from the user device and outputting the user signed certificate to the user device.