Kddi Corporation

Keio University

Kiddi Corporation

Keisuke Takemori

Hideaki Kawabata

Ayumu Kubota

Seiichiro Mizoguchi

Takamasa Isohara

Hiroshi Ishizuka

Teruaki Honma

Seiichirou Mizoguchi

Akinori Totsuka

Kei Katou

Yutaka Miyake

Toshiaki Tanaka

Iwao Sasase

Yasuaki Kobayashi

Yoshiyuki Shibata

A vehicle security system includes a terminal device, a server device, and a vehicle. The terminal device includes a token acquisition unit and a terminal communication unit configured to transmit the token, terminal identification information, and vehicle identification information to the server device. The server device includes a server communication unit, a server determination unit configured to determine that authentication has succeeded, and a server storage unit configured to store the terminal identification information and the vehicle identification information received from an authenticated terminal device in association. The server communication unit transmits the token and the terminal identification information to the vehicle of the vehicle identification information. The vehicle includes a vehicle communication unit, a vehicle determination unit configured to determine that authentication has succeeded, and a vehicle storage unit configured to store the received terminal identification information in association with the token of authentication success.

Vehicle security system and vehicle security method

A maintenance system includes a server device, a terminal device, and an in-vehicle device installed in a vehicle. The server device includes a worker authentication information reception unit configured to receive worker authentication information from the terminal device, a server authentication processing unit configured to perform an authentication process on the worker authentication information, and a server key transmission unit configured to transmit a first key to be used with the in-vehicle device to the terminal device whose worker authentication information has been successfully authenticated by the server authentication processing unit. The terminal device includes a worker authentication information transmission unit configured to transmit the worker authentication information to the server device, a terminal key reception unit configured to receive the first key from the server device, and a terminal authentication processing unit configured to perform an authentication process with the in-vehicle device using the first key.

Maintenance system and maintenance method

An in-vehicle computer generates a message authentication code about its own log using its own signature key and thereby transmits a log annotated with its message authentication code to a vehicle information collection device. The vehicle information collection device generates the signature key of the in-vehicle computer, verifies the message authentication code, which is included in the log annotated with its message authentication code received from the in-vehicle computer, using generated signature key, and thereby stores the log relating to the successfully verified message authentication code on storage media.

Vehicle information collection system, vehicle-mounted computer, vehicle information collection device, vehicle information collection method, and computer program

A communication system is provided that allows communication between a vehicle and a server device. This communication system includes: the server device; a first arithmetic processing device installed in the vehicle; and a second arithmetic processing device that is a secure element and is installed in the vehicle. The second arithmetic processing device includes: a vehicle key storage unit that stores a first key and a second key; a vehicle authentication processing unit that performs authentication with the server device using the first key; and a vehicle key transmission/reception unit that transmits or receives a third key to or from the server device by encryption communication which uses the second key. The first arithmetic processing device includes a vehicle communication unit that performs encryption communication with the server device using the third key.

Communication system, vehicle, server device, communication method, and computer program

A data provision system includes a data provision device and a data security device installed in a vehicle. The data provision device includes a vehicle interface configured to transmit data to and receive data from the vehicle; and an cryptographic processing unit configured to generate an electronic signature of application data to be applied to an in-vehicle computer installed in the vehicle by using a secret key of the data provision device, wherein application data with the electronic signature, which is obtained by attaching the electronic signature to the application data, is transmitted to the vehicle through the vehicle interface. The data security device includes an interface unit configured to transmit data to and receive data from a device outside the data security device; and an cryptographic processing unit configured to verify the electronic signature of the application data with the electronic signature received from the data provision device.

Data provision system, data security device, data provision method, and computer program

Provided are a key generation device and an in-vehicle computer which is installed in a vehicle. The key generation device includes a vehicle interface, a key generation unit that generates first and second keys, a cryptographic processing unit that encrypts the first key with an initial key to generate first encrypted data and encrypts the second key with the first key to generate second encrypted data, an expected value calculation unit that calculates an expected value of stored data using the second key, and a verification unit that verifies a received measured value on the basis of the expected value, and the key generation device transmits the first and second encrypted data to the vehicle. The in-vehicle computer includes an interface unit, a cryptographic processing unit that decrypts the received first encrypted data, and decrypts the received second encrypted data, and a measured value calculation unit.

Management system, key generation device, in-vehicle computer, management method, and computer program

A management device installed in a vehicle includes a master key storing part configured to share the master key that is used to generate an initial key held by an ECU together with an identifier of the ECU; a communication part configured to communicate with the ECU; a key generation part configured to generate the initial key of the ECU by use of the master key stored on the master key storing part and the identifier of the ECU received from the ECU via the communication part; and an initial key storing part configured to store the initial key of the ECU that is generated by the key generation part in connection with the identifier of the ECU.

Management device, management system, key generation device, key generation system, key management system, vehicle, management method, key generation method, and computer program

A communication network system, in which a transmission node for transmitting a message is connected to a reception node for receiving the message, is configured to periodically transmit a count-value notification message to notify a count value, which is used to generate and check a message authentication code for the message, to the transmission node and the reception node.

Communication network system and count-value sharing method using count-value notification node with transmission node and reception node

A reuse system includes: a key generation device; an in-vehicle computer that is detached from a first vehicle and is installed in a second vehicle; and a data security device that is installed in the second vehicle. The key generation device includes a vehicle interface, and a key generation unit that generates a first key that is the same as a key stored in the in-vehicle computer from a time when being installed in the first vehicle by using an in-vehicle computer identifier, and a master key that is common to the first and second vehicles, and transmits the first key to the second vehicle. The data security device includes a first interface unit, and a first cryptographic processing unit that encrypts first data, which is applied to the in-vehicle computer, with the first key to generate encrypted first data, and transmits the encrypted first data to the in-vehicle computer.

Reuse system, key generation device, data security device, in-vehicle computer, reuse method, and computer program

A data provision system includes a data provision device and a data security device installed in a vehicle. The data provision device includes a vehicle interface configured to transmit data to and receive data from the vehicle and an expected value calculation unit configured to calculate an expected value of application data to be applied to an in-vehicle computer installed in the vehicle. The application data and the expected value are transmitted to the vehicle through the vehicle interface. The data security device includes an interface unit configured to transmit data to and receive data from a device outside the data security device and a measurement unit configured to calculate a measurement value of the application data received from the data provision device through the interface unit and verify the measurement value on the basis of the expected value received from the data provision device through the interface unit.

A communication system is provided, including a plurality of terminal devices and a root certification authority. Each of the plurality of terminal devices includes a certification authority key generation unit, a certification authority public key certificate acquisition unit that acquires a certification authority public key certificate, a certification authority key storage unit, a transmission unit, and a verification unit that verifies the certification authority public key certificate with a root certification authority public key certificate, and verifies a user in a case where the verification succeeds. The root certification authority includes a root certification authority key storage unit, a communication unit, and a certification authority public key certificate generation unit that generates the certification authority public key certificate by encrypting the certification authority public key with the root certification authority secret key. The communication unit transmits the certification authority public key certificate to a terminal device.

Communication system, hardware security module, terminal device, communication method, and program

An onboard computer system includes a first onboard computer configured to store a first public key certificate of a data delivering apparatus, a second onboard computer, and a secure element configured to store a second public key certificate relative to a second secret key used to generate the first public key certificate. The secure element verifies the first public key certificate by use of the second public key certificate. The first onboard computer includes an encryption processor configured to verify a first electronic signature attached to data delivered from the data delivering apparatus by use of the first public key certificate which is successfully verified by the secure element. The data attached with the first electronic signature, which is successfully verified by the encryption processor, is applied to the first onboard computer or the second onboard computer.

Onboard computer system, vehicle, management method, and computer program

In a secure hardware extension (SHE)-B, an initial key is set to a KEY_N key usable in a verification process and a generation process for a message authentication code. In an SHE-A, a master key is set to a KEY_N key usable in the verification process and the generation process for the message authentication code, the master key being used together with an identifier of an authenticated electronic control unit (ECU) for generating the message authentication code to be used as the initial key. A central processing unit (CPU) causes the message authentication code for the identifier of the authenticated ECU to be generated using the master key through the SHE-A and executes a process of authenticating validity of the authenticated ECU by using the generated message authentication code.

In-vehicle computer system, vehicle, key generation device, management method, key generation method, and computer program

In a communication network system connected between a transmission node and a reception node, both the transmission node and the reception node store the same secret information with their secret information storage units. The transmission node includes a counter configured to increase its transmission count value by 1 for transmitting each message, wherein a MAC generator generates MAC based on secret information, transmission data, and its transmission count value, thus transmitting a message including transmission data and MAC. The reception node includes a counter configured to increase a reception count value by 1 for receiving each message, wherein a MAC checking part generates MAC based on secret information, reception data, and its reception count value, obtained from the received message, thus checking whether the generated MAC matches the MAC obtained from the received message.

Communication network system, transmission node, reception node, and message checking method

A communication device includes: a first subscriber identification unit that stores first subscriber identification unit identification information associated with user identification information; and a communication unit that communicates with another communication device, the other communication device including a second subscriber identification unit that stores second subscriber identification unit identification information associated with user identification information. The first subscriber identification unit includes: a key memory unit that records a pair of a public key certificate and a secret key, the pair being shared with the second subscriber identification unit; a public key certificate generation unit that generates, using the secret key recorded in the key memory unit, a 'first public key certificate comprising the first subscriber identification unit identification information or the user identification information associated with the first subscriber identification unit identification information'; and a secret key memory unit that records a secret key paired with the first public key certificate.

Growing community of inventors

Tokyo, Japan

Keisuke Takemori