Method for generating a message signature from a signature token encrypted by means of a homomorphic encryption function
US10326598B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 2, 2016 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | Jan 22, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L9/3252
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for generating a message signature intended to be validated by a verifier server. A client device is configured to hold a private key and a corresponding public key. The method includes offline pre-computation by a hardware security module of a signature token, a result of encryption using a homomorphic encryption function, storage of the signature token generation of the signature of the encrypted message by the homomorphic encryption function from the result of the encryption by the homomorphic encryption function of the private key stored by the client device, of the signature token and of the message. The signature is intended to be validated by the verifier server by the public key.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.