COMMUNICATION SYSTEM, COMMUNICATION DEVICE, VEHICLE AND COMMUNICATION METHOD

• US 20160065367A1
• Filed: 08/26/2015
• Published: 03/03/2016
• Est. Priority Date: 08/28/2014
• Status: Active Grant

• Current Assignee: Renesas Electronics Corporation
• Original Assignee: Renesas Electronics Corporation
• Inventors: OSHIDA, Daisuke, SATO, Yoshiyuki, SAGESAKA, Yasuhiro, ITOME, Takeshi
• Granted Patent: US 10,374,796 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G08G 1/096783 where the origin of the information is a roadside individual element
• CPC Class Codes: G08G 1/096791 where the origin of the information is another vehicle
• CPC Class Codes: G08G 1/162 event-triggered
• CPC Class Codes: H04B 1/3822 specially adapted for use in vehicles H04B1/3827 takes precedence
• CPC Class Codes: H04B 1/3827 Portable transceivers
• CPC Class Codes: H04L 2101/604 Address structures or formats
• CPC Class Codes: H04L 2101/668 Internet protocol [IP] address subnets
• CPC Class Codes: H04L 61/5007 Internet protocol [IP] addresses
• CPC Class Codes: H04L 61/5053 Lease time; Renewal aspects
• CPC Class Codes: H04L 61/5092 by self-assignment, e.g. picking addresses at random and testing if they are already in use
• CPC Class Codes: H04L 63/0869 for achieving mutual authentication cryptographic mechanisms or cryptographic arrangements for mutual authentication H04L9/3273
• CPC Class Codes: H04L 63/0892 by using authentication-authorization-accounting [AAA] servers or protocols
• CPC Class Codes: H04L 63/107 wherein the security policies are location-dependent, e.g. entities privileges depend on current location or allowing specific operations only from locally connected terminals
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: H04L 9/0869 involving random numbers or seeds
• CPC Class Codes: H04W 12/069 using certificates or pre-shared keys
• CPC Class Codes: H04W 4/025 using location based information parameters

Abstract

Provided is a high-speed and light-weighted authentication system that makes IP address filtering possible and does not impair real-time property even on a network including many and unspecific entities (communication devices). In a communication system that a plurality of communication devices are coupled together such that mutual communication is possible over the network, the communication devices communicate with a server under a secure environment, when authentication has been obtained from the server, random seeds of the same value and individual identifiers are issued to them, each communication device generates the IP address that includes a pseudorandom number and the identifier, and the communication devices establish communication between the communication devices that include the pseudorandom numbers that are mutually the same in their IP addresses.

Claims

1. A communication system that a plurality of communication devices are coupled together such that mutual communication is possible over a network and each of the communication devices is coupled with a server such that communication with the server is possible,

wherein the server is requested authentication from the communication devices under a secure environment and issues random seeds of the same value and individual identifiers to the communication devices when the server has authenticated the communication devices,

wherein each of the communication devices includes its own area information and includes an IP address that includes a pseudorandom number that has been generated by using the area information and the issued random seed as seeds and the identifier that has been issued to the communication device itself, and

wherein the communication devices establish communication between the communication devices that include the pseudorandom numbers that are mutually the same in their IP addresses.

2. The communication system according to claim 1,

wherein each of the communication devices further includes time information and the pseudorandom number is generated by using a value that has been generated with an irreversible compressibility function on the basis of the area information, the time information and the random seed as the seed.

3. The communication system according to claim 2,

wherein each of the communication devices includes a GPS reception unit and the GPS reception unit generates the area information and the time information.

4. The communication system according to claim 1,

wherein the server periodically reissues random seeds of values that are different from the values of the already issued random seeds and are the same as one another to the communication devices and each of the communication devices updates the IP address on the basis of the reissued random seed.

5. The communication system according to claim 1,

wherein the communication devices include a communication device to be loaded on a vehicle and a communication device to be loaded on a roadside machine.

6. The communication system according to claim 5,

wherein the communication devices include a communication device to be loaded on portable electronic equipment that a pedestrian carries with him/her and/or a communication device to be loaded on a bicycle.

7. A communication device that communicates with a server and communicates with other communication devices over a network, comprising:

an IP address that includes a pseudorandom number that has been generated by using a value generated with an irreversible compressibility function on the basis of area information and a random seed that has been issued from the server under a secure environment as a seed,

wherein the communication device authenticates another communication device that includes an IP address including the same pseudorandom number as its IP address as a communication object.

8. The communication device according to claim 7, further comprising:

time information,

wherein the pseudorandom number is generated by using a value generated with the irreversible compressibility function on the basis of the area information, the time information and the random seed as the seed.

9. The communication device according to claim 8, further comprising:

a GPS reception unit,

wherein the GPS reception unit generates the area information and the time information.

10. The communication device according to claim 7,

wherein the random seed is periodically reissued from the server and the IP address is updated on the basis of the reissued random seed.

11. The communication device according to claim 7,

wherein the communication device is formed on a single semiconductor substrate.

12. A vehicle that loads the communication device according to claim 7 thereon.

13. A communication method in a communication system that a plurality of communication devices are coupled together such that mutual communication is possible over a network and each of the communication devices is coupled with a server such that communication with the server is possible, comprising:

the first step that when the server has been requested authentication from the communication devices under a secure environment and authenticated the communication devices, the server issues pseudo seeds of the same value and individual identifies to the communication devices;

the second step that each of the communication devices includes its own area information and generates an IP address that includes a pseudorandom number generated by using the area information and the issued random seed as seeds and the identifier that has been issued to the communication device itself; and

the third step that the communication devices establish communication between the communication devices that include the pseudorandom numbers that are mutually the same in their IP addresses.

14. The communication method according to claim 13,

wherein each of the communication devices further includes time information and, in the second step, the pseudorandom number is generated by using a value generated with an irreversible compressibility function on the basis of the area information, the time information and the random seed as a seed.

15. The communication method according to claim 14,

wherein each of the communication devices includes a GPS reception unit and the GPS reception unit generates the area information and the time information.

16. The communication method according to claim 13,

wherein the server periodically issues random seeds of values that are different from the values of the already issued random seeds and are the same as one another to the communication devices and each of the communication devices updates the IP address on the basis of the reissued random seed.

17. The communication method according to claim 13,

wherein the communication devices include a communication device to be loaded on a vehicle and a communication device to be loaded on a roadside machine.

18. The communication method according to claim 17,

wherein the communication devices includes a communication device to be loaded on portable electronic equipment that a pedestrian carries with him/her and/or a communication device to be loaded on a bicycle.