IN-VEHICLE SYSTEM AND COMMUNICATION METHOD
First Claim
1. An in-vehicle system for communicating with an external tool, the system comprising:
- a communication device;
a tool key acquisition device; and
a communication controller,wherein the in-vehicle system and an external server provide a vehicular communication system,wherein the external tool stores a tool secret key,wherein the external server stores external tool information,wherein the external tool information provides a tool public key and key identification information, which are associated with each other,wherein the tool public key provides a public key, which pairs with the tool secret key,wherein the key identification information provides identification information about the tool public key,wherein the communication device communicates with the external server,wherein, when the external tool requests communication connection with the in-vehicle system, the tool key acquisition device transmits the key identification information corresponding to the external tool as a request source to the external server via the communication device, so that the tool key acquisition device acquires the tool public key associated with the key identification information from the external server via the communication device, andwherein the communication controller performs cryptographic communication with the external tool as the request source with using the tool public key acquired by the tool key acquisition device.
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Accused Products
Abstract
An in-vehicle system for communicating with an external tool for storing a tool secret key includes: a communication device; a tool key acquisition device; and a communication controller. The in-vehicle system and an external server for storing external tool information provide a vehicular communication system. The external tool information provides a tool public key and key identification information. The tool public key pairs with the tool secret key. When the external tool requests communication connection with the in-vehicle system, the tool key acquisition device transmits the key identification information to the external server, so that the tool key acquisition device acquires the tool public key from the external server. The communication controller performs cryptographic communication with the external tool using the tool public key.
62 Citations
13 Claims
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1. An in-vehicle system for communicating with an external tool, the system comprising:
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a communication device; a tool key acquisition device; and a communication controller, wherein the in-vehicle system and an external server provide a vehicular communication system, wherein the external tool stores a tool secret key, wherein the external server stores external tool information, wherein the external tool information provides a tool public key and key identification information, which are associated with each other, wherein the tool public key provides a public key, which pairs with the tool secret key, wherein the key identification information provides identification information about the tool public key, wherein the communication device communicates with the external server, wherein, when the external tool requests communication connection with the in-vehicle system, the tool key acquisition device transmits the key identification information corresponding to the external tool as a request source to the external server via the communication device, so that the tool key acquisition device acquires the tool public key associated with the key identification information from the external server via the communication device, and wherein the communication controller performs cryptographic communication with the external tool as the request source with using the tool public key acquired by the tool key acquisition device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for communicating between an in-vehicle system and an external tool comprising:
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transmitting key identification information from the external tool to the in-vehicle system, wherein the key identification information provides identification information about a tool public key of the external tool; transmitting the key identification information from the in-vehicle system to a external server, wherein the external server stores the tool public key and key identification information about the tool public key, which are associated with each other; transmitting the tool public key from the external server to the in-vehicle system, wherein the tool public key is associated with the key identification information received by the external server; transmitting a common key from the in-vehicle system to the external tool, wherein the common key is encrypted using the tool public key received by the in-vehicle system; and decrypting an encrypted common key received by the external tool using a tool secret key, which pairs with the tool public key of the external tool; and performing cryptographic communication with the in-vehicle system using the common key. - View Dependent Claims (10, 11, 12, 13)
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Specification