Method of providing a hash value for a piece of data, electronic device and computer program
US10447479B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 2016 |
| Grant date | Oct 15, 2019 |
| Priority date | — |
| Expiry date | May 11, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/80
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A hash value provides for a time-stamp for a piece of data upon verification. Providing the hash value includes deriving one-time signing keys of signer's one-time signing key hash chain by a one-way function of a secret key of the signer and a function of an index of the one-time signing key, and providing the hash value for the piece of data by a hash function including the piece of data and the derived one-time signing key. An electronic device having a processor arranged to implement a functional module for deriving a one-time signing key and providing a hash value for a piece of data by a hash function including the piece of data and the derived one-time signing key is also disclosed. The functional module is arranged to perform the method. A computer program for implementing the method on the electronic device is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.