A BD-ROM stores a disc root certificate that is issued by a root certificate authority and assigned to the disc medium. An application manager acquires a hash value from the disc root certificated and verifies the authenticity of an application by using the hash value. If the authenticity is verified, a virtual machine executes the application. A local storage has a plurality of domain areas. From among the plurality of domain areas, a security manager allocates to the application a domain area that corresponds to the hash value.