Method of evidencing existence of digital documents and a system therefor
US11177940B2 · kind B2 · utility
1Cited by
3References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 19, 2018 |
| Grant date | Nov 16, 2021 |
| Priority date | — |
| Expiry date | Jun 19, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/50
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A computer-implemented method for evidencing the existence of a digital document has the steps of obtaining one or a plurality of time stamp(s) of the digital document, obtaining one or a plurality of cryptographic hash(es) of the digital document, generating one or a plurality of evidence key(s) based on the time stamp(s) and the cryptographic hash(es), and storing the evidence key(s) to provide one or a plurality of stored evidence key(s). A computer system for evidencing the existence of a digital document is also provided. A computer-implemented tag chain system is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.