Map information management system, map information management device, and map company exclusive application data management device

A map information management system comprising:

• a map information management device including:
• a map information generating device including processing circuitry configured to generate map information;
• and
• a map information output device including processing circuitry configured to generate a map information electronic signature for conducting an authenticity certification of the map information, using a map information secret key, based on the map information, and output the map information and the map information electronic signature in combination,
• a map company exclusive application data management device including processing circuitry configured to obtain the map information and the map information electronic signature from the map information management device, conduct a signature verification of the map information, using a map information public key corresponding to the map information secret key and the map information electronic signature, add map company exclusive application data to the map information which has been confirmed to be authentic by the signature verification, generate a map company exclusive application data electronic signature for conducting an authenticity certification of the map information to which the map company exclusive application data has been added, using a map company exclusive application data secret key, based on the map information to which the map company exclusive application data has been added and the map information electronic signature, and output the map information to which the map company exclusive application data has been added, the map information electronic signature and the map company exclusive application data electronic signature in combination.

A map information management system comprising:

• a map information management device including:
• a map information generating device including processing circuitry configured to generate map information;
• and
• a map information output device including processing circuitry configured to generate encrypted map information which is obtained by a homomorphic encryption or a fully homomorphic encryption of the map information using a map information secret key, and output the encrypted map information,
• a map company exclusive application data management device including processing circuitry configured to obtain the encrypted map information from the map information management device, decrypt the encrypted map information to obtain the map information, using a map information public key corresponding to the map information secret key, verify authenticity of the map information, add map company exclusive application data to the obtained map information, generate encrypted map company exclusive application data which is obtained by the homomorphic encryption or the fully homomorphic encryption of the map information and the map company exclusive application data using a map company exclusive application data secret key, and output the encrypted map company exclusive application data.

A map company exclusive application data management device comprising:

• processing circuitry configured to
• obtain encrypted data from a map information management device being adapted to generate the encrypted data based on map information using a map information secret key,
• confirm authenticity of the map information, using a map information public key corresponding to the map information secret key and the encrypted data obtained from the map information management device,
• generate encrypted data by a map company exclusive application data secret key, based on data which is obtained by adding map company exclusive application data to the map information which has been confirmed to be authentic, the map company exclusive application data including information on at least one of shops, architectures, public facilities, and commercial facilities which exist adjacent to roads that are displayed in the map information when the map information is used in a vehicle navigation device, and
• output the encrypted data.

A map information management device comprising:

• a map information generating device including processing circuitry configured to generate map information;
• and
• a map information output device including processing circuitry configured to generate a map information electronic signature for conducting an authenticity certification of the map information, using a map information secret key, based on the map information,
• wherein the map information management device includes a map information certification authority to generate each of the map information secret key and a map information public key for a signature verification of an electronic signature by the map information secret key, and a map company exclusive application data secret key and a map company exclusive application data public key for a signature verification of an electronic signature by the map company exclusive application data secret key, and distribute each generated secret key and each generated public key.

A map company exclusive application data management device comprising:

• processing circuitry configured to
• obtain a map information and a map information electronic signature from a map information management device being adapted to generate the map information electronic signature for conducting an authenticity certification of the map information, using a map information secret key;
• conduct a signature verification of the map information, using a map information public key corresponding to the map information secret key and the map information electronic signature;
• add map company exclusive application data to the map information which has been confirmed to be authentic by the signature verification;
• generate a map company exclusive application data electronic signature for conducting an authenticity certification of the map information to which the map company exclusive application data has been added, using a map company exclusive application data secret key, based on the map information to which the map company exclusive application data has been added and the map information electronic signature;
• and
• output the map information to which the map company exclusive application data has been added, the map information electronic signature and the map company exclusive application data electronic signature in combination.

A map company exclusive application data management device comprising:

• processing circuitry configured to
• obtain encrypted map information from a map information management device being adapted to generate the encrypted map information which is obtained by a homomorphic encryption or a fully homomorphic encryption of map information using a map information secret key;
• decrypt the encrypted map information to obtain the map information, using a map information public key corresponding to the map information secret key;
• verify authenticity of the map information, adds map company exclusive application data to the obtained map information;
• generate encrypted map company exclusive application data which is obtained by the homomorphic encryption or the fully homomorphic encryption of the map information and the map company exclusive application data using a map company exclusive application data secret key;
• and
• output the encrypted map company exclusive application data.