Private key security in the cloud
US12120249B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 1, 2023 |
| Grant date | Oct 15, 2024 |
| Priority date | — |
| Expiry date | Sep 1, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/42
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Techniques for providing to a user with an anonymous user signature on a message in a distributed decentralized network are presented. The techniques use a hardware security module and a certificate authority. The certificate authority: obtains a credential that includes a certificate for the user, where the certificate includes a user public key and a plurality of user attributes; receives a request for a signature on the message, where the request includes an indication of a subset of the plurality of user attributes to be revealed; accesses from the hardware security module a user secret key; and provides to the user at least the message signed by the user secret key and a zero-knowledge proof that establishes that the message is signed by the user secret key corresponding to the user public key in the credential without revealing the plurality of user attributes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.