Security for Wireless Handheld Devices

DAT, Inc. has invented and developed an authentication technology that employs as the source of a shared secret a source of dynamic entropy whose origins lie within chaotic, natural physical processes. By using a secret whose value is based on location and must be measured at that location, DAT has been able to add new layers of control to the authentication process. These new layers of control effectively add two new access control credentials: - where have you been - where are you now The DAT technology can be employed to provide a location-based authentication system that cannot be spoofed, predicted or otherwise subverted. The technology combines this powerful, location-specific random entropy (noise) with known technologies in a unique way to provide a powerful new method of user and data packet authentication that is based on location. DAT proposes to study the uniqueness of these signatures in a wireless environment in order to discriminate between approved and unapproved users for granting access to a LAN. Issues such as building construction, activity within the RF spectrum, spatial granularity and temporal stability will all be examined.