Communication system, hardware security module, terminal device, communication method, and program
US10931464B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 2017 |
| Grant date | Feb 23, 2021 |
| Priority date | — |
| Expiry date | Jun 2, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.