NAVIGATION SYSTEM

摘要

In a navigation system, an updating unit includes an update encryption key. The updating unit transfers map data for updating to a recording medium and records the updating map data therein, transfers to the recording medium a hash value generated from at least a part of the map data for updating and records the hash value therein as map security data, and transfers to the recording medium data obtained by encrypting with the update encryption key medium identification information and the map security data or map security processing data obtained by processing the map security data and records the data therein as updating security data.