Data registration method, data decryption method, data structure, computer, and program
US11720689B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2018 |
| Grant date | Aug 8, 2023 |
| Priority date | — |
| Expiry date | Sep 27, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/56
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An objective is to manage contract data registered in a distributed ledger with part of the contract data flexibly concealed without a centralized concealment server and without bothering the user with complicated procedures or the key management. A data registration method performed by a computer includes: generating a common key for encrypting and decrypting an item included in data that is registered in a distributed ledger; acquiring a public key for each account of a user having access authority to the item; encrypting the common key with the public key for each account; and registering the common key encrypted for each account in the distributed ledger via a transaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.