Abstract: A data security system for a navigation system comprising an enabling/disabling unit for enabling or disabling a data transfer from a data memory to a data storage unit of the navigation system, an identification unit for identifying an identification code, such as a vehicle or navigation system identification code, and a comparison unit for comparing these identification codes with identification codes stored in the enabling/disabling unit, where the enabling/disabling unit may enable or disable the data transfer responsive to the comparison. If a vehicle or navigation system identification code is not stored in the enabling/disabling unit, a read/write unit writes an identification code retrieved by an identification unit into the enabling/disabling unit.

Abstract: A database system for a global positioning (GPS) vehicular navigation device having a first database including street information data and a second database, including location information data that is independent of the first data. The database system includes a working memory unit including a first memory area and a second memory area separate from the first memory area. The first data includes street information stored in the first memory area and the second data includes location information stored in the second memory area.