A first obtaining unit obtains authentication information. A first sending unit sends the authentication information. A generating unit generates an execution request. A second sending unit sends the execution request. A device includes a first holding unit holding authentication information registered in advance; an authenticating unit performing an authentication operation by determining whether one or more sets of authentication information held by the first holding unit include authentication information matching with authentication information received by a first receiving unit; a second holding unit holding identification information of the authenticated user; and a control unit performing, when identification information included in the execution request received by a second receiving unit matches with identification information held by the second holding unit, control to perform operations based on the execution request, and, when the two sets of identification information do not match, control to request the information processing terminal for the authentication information.