Reuse system, key generation device, data security device, in-vehicle computer, reuse method, and computer program
US11082228B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2017 |
| Grant date | Aug 3, 2021 |
| Priority date | — |
| Expiry date | Aug 8, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/84
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.