Title:
ELECTRONIC WATERMARKING SYSTEM, ELECTRONIC WATERMARKING METHOD AND PROGRAM
Document Type and Number:
WIPO Patent Application WO/2021/095103
Kind Code:
A1
Abstract:
An electronic watermarking system for achieving electronic watermarking for a cryptographic function according to the present invention is characterized by comprising: a key generation means that receives a security parameter as an input thereto and generates both a watermark embedding key for embedding information representative of a watermark for a circuit achieving the cryptographic function and a watermark extraction key for extracting the information representative of the watermark from the circuit into which the watermark has been embedded; an embedding means that receives as inputs thereto a master secret key used for the cryptographic function, the watermark embedding key and the information representative of the watermark and generates the circuit into which the watermark has been embedded and which achieves the cryptographic function; and an extracting means that receives as inputs thereto the watermark extraction key and the circuit into which the watermark has been embedded by the embedding means and extracts the information representative of the watermark from the circuit.
Inventors:
NISHIMAKI RYO (JP)
Application Number:
PCT/JP2019/044170
Publication Date:
May 20, 2021
Filing Date:
November 11, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
H04N1/32; G09C1/00; H04L9/00
Foreign References:
| JP2005210512A | 2005-08-04 | |||
| JP2015068871A | 2015-04-13 |
Other References:
GOYAL, RISHAB: "Watermarking Public-Key Cryptographic Primitives", ANNUAL INTERNATIONAL CRYPTOLOGY CONFERENCE CRYPTO 2019, vol. 2, 1 August 2019 (2019-08-01), pages 1 - 64, XP047516389
BONEH, DAN: "Efficient selective-ID secure identity based encryption without random oracles", INTERNATIONAL CONFERENCE ON THE THEORY AND APPLICATIONS OF CRYPTOGRAPHIC TECHNIQUES EUROCRYPT 2004, VOL. 3027 OF LNCS, vol. 1, 2004, pages 223 - 238, XP019005019
COHEN, ALONI, SCIS2016 SYMPOSIUM ON CRYPTOGRAPHY AND INFORMATION SECURITY, vol. 4, 19 January 2016 (2016-01-19), pages 1 - 8
BONEH, DAN: "Efficient selective-ID secure identity based encryption without random oracles", INTERNATIONAL CONFERENCE ON THE THEORY AND APPLICATIONS OF CRYPTOGRAPHIC TECHNIQUES EUROCRYPT 2004, VOL. 3027 OF LNCS, vol. 1, 2004, pages 223 - 238, XP019005019
COHEN, ALONI, SCIS2016 SYMPOSIUM ON CRYPTOGRAPHY AND INFORMATION SECURITY, vol. 4, 19 January 2016 (2016-01-19), pages 1 - 8
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
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