Authentication method, authentication System, and authentication program

摘要

A data server to authenticate a passenger anonymously and allow an outside service to provide a service on the basis of this authentication. A passenger in an automobile uses a portable terminal with an acceleration sensor to send the acceleration sensor log in the portable terminal to a data server. The data server calculates the degree of similarity between the acceleration sensor log and time-series data related to acceleration obtained from probe data acquired from the automobile, and verifies that the portable terminal is indeed inside the automobile by confirming that there is a sufficiently high correlation between the log and the time-series data. The data server provides an access permission code to the portable terminal in response to successful acceleration authentication. The portable terminal provides the access permission code to an outside service, and the outside service accesses probe data in the data server using the access permission code.