System and method for generating one-time data signatures
US10511447B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 26, 2018 |
| Grant date | Dec 17, 2019 |
| Priority date | — |
| Expiry date | Sep 26, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A digital signature is created for a data set based on a group of one-time secret keys. Revealable, representative values of the secret keys are computed, for example by cryptographic hashing, and an authentication code vector is also formed having elements that cryptographically combine each secret key with a randomizing function of the data set. The vector is timestamped and signed at a signing time. Bits of a binary representation of the signing time are used to select which of the secret values are included in a selected key vector. A signature of the digital data is then compiled to include the set of authentication code values, the signature of the authentication code vector, and the selected key vector. The secret keys thereby become unusable after the signing time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.