An image processing apparatus is disclosed that includes an installation unit that installs an authentication package providing a function related to authentication; a signature confirmation unit that confirms whether an issuance source of the authentication package is an authenticated issuance source based on an electronic signature attached to the authentication package; and an authentication package confirmation unit that confirms the authentication package based on attribute information of the authentication package confirmed to be the authenticated issuance source by the signature confirmation unit. In the image processing apparatus, the installation unit installs the authentication package confirmed by the authentication package confirmation unit.