Stateful hash-based signatures using a secure device
US12355874B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 2023 |
| Grant date | Jul 8, 2025 |
| Priority date | — |
| Expiry date | Nov 6, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Stateful hash-based signatures can be implemented using a secure device. For example, a computing device can transmit a request to a secure device to obtain a partial digital signature usable to cryptographically sign data, where the secure device is separate from the computing device. The secure device can generate the partial digital signature using a private key, which is generated by the secure device based on a counter value. The counter value is maintained internally to the secure device. The computing device can then receive, from the secure device, the partial digital signature and the counter value corresponding to the private key. The computing device can construct a full digital signature, to cryptographically sign the data, based on the partial digital signature and the counter value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.