An encryption technique having a greater encryption strength than conventional mathematical encryption by using classic physical random numbers etc. A second RF power detector is provided for detecting a signal power of the RF input signal and for providing a second detected signal. A processor is provided for determining a vital sign information signal of the subject based on the data signals of skin pixel areas within the skin area, and a post-processor is provided for determining the desired vital sign from said vital sign information signal. The combination game table is pivotally retained by a side support member on each end thereof.