The present invention relates to an automatic translation and interpretation apparatus and method. The person condition information may include either or both of positional information on the position of the user and postural information on the posture of the user. In another approach, the optical radiation that is to be detected is combined with a high power CW boost mode signal in a waveguide, and the sum andor difference frequencies are detected. Candidate authorization information is obtained from the user, and a candidate hash value is generated by applying a hashing algorithm to the candidate authorization information, the state information, or a combination of the candidate authorization information and state information.