Digital watermark system, digital watermark method and program
US12120231B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 11, 2019 |
| Grant date | Oct 15, 2024 |
| Priority date | — |
| Expiry date | Jul 7, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2209/608
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital watermark system that realizes digital watermark for a cryptographic function, including a memory and a processor configured to take as input a security parameter and generate a watermark embedding key for embedding information representative of a watermark in a circuit that realizes the cryptographic function, and a watermark extraction key for extracting information representative of the watermark from a circuit in which a watermark is embedded; take as input a master private key used for the cryptographic function, the watermark embedding key, and information representative of a watermark, and generate a circuit in which the watermark is embedded and that realizes the cryptographic function; and take as input the watermark extraction key and the circuit in which the watermark has been embedded, and extract information representative of a watermark from the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.