Abstract: A living body detection system includes a transmitting and receiving unit performing transmission and reception of detection waves at an inside of a movable body, the detection waves including directivity in at least one of the transmission and the reception of the detection waves, and a processing unit controlling the transmission of the detection waves and extracting living body information from a receiving signal based on the detection waves received by the transmitting and receiving unit to detect a living body at the inside of the movable body.

Abstract: An authentication terminal includes: a casing that is worn on a body of a target person; first and second electrodes that are provided in the casing and measure a measurement potential as biological information; a light emitting unit that is provided in the casing and emits measurement light for measuring a muscle potential to the body of the target person; a light receiving unit that receives the measurement light and outputs muscle potential information which corresponds to the muscle potential; and a terminal-side control unit that outputs authentication information which is generated based on the muscle potential that is indicated by the muscle potential information, and on a cardiac potential that is calculated from the measurement potential between the first electrode and the second electrode to another device.