The present technology relates to an information processing device and an information processing method that enable the convenience of a sensor unit to improve. The information processing device according to the present technology includes: an authentication unit configured to perform authentication processing with a different information processing device； and a power supply unit configured to supply power to the different information processing device with which the authentication processing has been performed, in a case where authentication of the authentication unit succeeds. The present technology can be applied to, for example, an information processing device, a biological sensor unit, a radio cooperative apparatus, a power supply device, or a radio communication device.
