On-vehicle device, ground data-managing device, ground-to-vehicle communication security system, and ground-to-vehicle communication method
US11044603B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 2016 |
| Grant date | Jun 22, 2021 |
| Priority date | — |
| Expiry date | Dec 11, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/16
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An on-vehicle device mounted on a train includes a second on-vehicle-side wireless communication unit that performs wireless communication with the ground side, and an on-vehicle-side ground-to-vehicle communication security unit that encrypts or decrypts wireless communication data. The on-vehicle-side ground-to-vehicle communication security unit includes an on-vehicle-side secret-key holding unit that retains a plurality of secret keys that have secret key numbers for performing encryption or decryption; an on-vehicle-side secret-key selecting unit that selects one secret key from the on-vehicle-side secret-key holding unit using a secret key number calculated using train information unique to a train; and an on-vehicle-side encryption and decryption processing unit that performs encryption or decryption using the one secret key selected by the on-vehicle-side secret-key selecting unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.