Abstract: A semiconductor device includes a semiconductor substrate, a cell region provided, and a termination region. The termination region surrounds the cell region and includes a plurality of first diffusion layers containing a first conductive impurity, a plurality of second diffusion layers each disposed on an outer side of each of the plurality of first diffusion layers and having a concentration of the first conductive impurity lower than that of the first diffusion layers, and a plurality of conductive layers opposing the first diffusion layers and the second diffusion layers on the front face of the semiconductor substrate, the plurality of conductive layers electrically connected to the first diffusion layers, the plurality of conductive layers each having an outer end portion. On a lower side of the outer end portion, any one of the plurality of second diffusion layers is present.

Abstract: An information processing device includes a meeting determination unit, an authentication reception unit, and an authentication determination unit. The meeting determination unit determines whether a user who is an authenticatee meets a user who is an authenticator based on information received from terminals used by the users. The authentication reception unit receives information indicating that an authentication operation is performed for the authenticatee from the terminal of the authenticator who is determined to have met the authenticatee. The authentication determination unit permits the authenticatee to use a predetermined information service, when receiving, from a predetermined number of terminals of authenticators, the information indicating that the authentication operation is performed for the authenticatee.

Abstract: An information processing device includes a meeting determination unit, an authentication reception unit, and an authentication determination unit. The meeting determination unit determines whether a user who is an authenticatee meets a user who is an authenticator based on information received from terminals used by the users. The authentication reception unit receives information indicating that an authentication operation is performed for the authenticatee from the terminal of the authenticator who is determined to have met the authenticatee. The authentication determination unit permits the authenticatee to use a predetermined information service, when receiving, from a predetermined number of terminals of authenticators, tho information indicating that the authentication operation is performed for the authenticatee.