Key exchange system and key exchange method
US11424913B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 2018 |
| Grant date | Aug 23, 2022 |
| Priority date | — |
| Expiry date | May 22, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W12/0471
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A key exchange system method safely conceal secret information recorded on a blockchain. A first terminal includes a license issuing unit that generates a first transaction including a first public key, a first key storage region that retains a first secret key, and a first encrypting and decrypting unit that generates a common key using deal-specific information, a second public key, and the first secret key, and a second terminal includes a license requesting unit that generates a second transaction including the second public key, a second key storage region that retains a second secret key, and a second encrypting and decrypting unit that generates the common key using deal-specific information, the first public key, and the second secret key. The first encrypting and decrypting unit encrypts secret information using the common key. The second encrypting and decrypting unit decrypts the encrypted secret information using the common key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.