System and method for deterministic signing of a message using a multi-party computation (MPC) process
US10833871B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Dec 26, 2019 |
| Grant date | Nov 10, 2020 |
| Priority date | — |
| Expiry date | Dec 26, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/46
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A method for signing a message, comprising performing a first Multi-Party Computation (MPC) process by multiple parties to compute a pseudorandom function, an input of the first MPC process comprises shares of a private signing key, each share is held by each party, the message is an input value to the pseudorandom function. The output of the first MPC process comprises multiple pairs of shares, each party holding a pair of shares, wherein each pair comprises a first value used for the MPC signing process and a second verifying value used for verifying correctness of the values provided by the multiple parties for the MPC signing process, and computing the signature on the message by performing an MPC signing protocol on the message, the MPC signing protocol receives as input shares of the output of the pseudorandom function from the multiple parties, and the message to be signed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.