| 摘要 |
The invention concerns a "Position Sensitive Key and Lock Device" system which is suitable for restricting access to digital data or physical objects based on the geographical location, determined from a terrestrial or outer space co-ordinate location system, at which the items are accessed. The system uses a Secure Key derived from the geographical coordinates as a decryption key to allow a user to access physical locks or previously encrypted data. Preferably the digital data comprises music, video or other information and the physical objects preferably include structures or (shipping) containers. The coordinate location system is preferably GPS although other systems, based on e.g. radio beacons, can be used that provide latitude, longitude and altitude (or ellipsoid) coordinates or their analogues, e.g. Cartesian coordinates. Also disclosed is allowing access at multiple locations; maintaining stored data in encrypted format whilst making it readable; a security feature whereby geographical location data for a device is sent to a user; the use of a physical embodiment of the Secure Key; time limiting access to the locked items; recording of the details of accesses to a device fined with the system of the invention; transmission of a new access location to a device associated with the items to be accessed. |
