The present invention provides one or more books of holograms recorded in a recording medium, wherein two or more short stacks of the one or more books have locations that differ from each other by a movement difference. When a tunnel setup request message is received from a host connected to a first private network to setup a tunnel to a second private network connected to a public network, a a control unit of the gateway communicates with the gateway of the second private network, negotiates necessary information, and sets up a VPN tunnel utilizing the information. The earwear can include an elongated member, such as a cord, and an earpiece coupled to the elongated member.