Patent ID: 7805526
Filing Date: 2010-09-28
Classification: H04L

Abstract:
1. A device-to-device authentication system for authenticating one or more devices on a local area network connectable to an external network via a router, the system comprising: a storage unit configured to store a media access control address of a default gateway; and a local environment management unit configured to determine when a local area network of a first device and a local area network of a second device are the same local area network by comparing a source media access control address to the media access control address of the default gateway, wherein the first device comprises: a unit configured to receive a request for access from the second device; unit configured to permit the request when it is determined that the first device and the second device are on the same local area network; and a unit configured to refuse the request when it is not determined that the first device and the second device are on the same local area network.