Apparatus and method for terminating an authorization to access a record in a blockchain ledger
US11546143B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2019 |
| Grant date | Jan 3, 2023 |
| Priority date | — |
| Expiry date | Jun 1, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A record of authorization including user information is received and appended to a blockchain. The record of authorization authorizes access by a third-party application to the user information for an access duration. The user information is encrypted by a group key and access duration is based on a change to the group key. The group key comprises a public/private key pair, and the access duration is implemented by an authorization group of nodes having the group key. The group key corresponds to either a valid group key at or near the start of the access duration, that enables decryption of a message in the record of authorization that includes the user information, or an incompatible group key at or after the end of the access duration, that does not enable decryption of the message in the record of authorization that includes the user information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.