The Undeniable Digital Multi-signature Scheme Suitable for Joint Copyright Protection on Digital Contents

디지털 콘텐츠 공동 저작권 보호에 적합한 부인봉쇄 디지털 다중서명 기법

  • 윤성현 (천안대학교 정보통신학부)
  • Published : 2005.02.01


In undeniable digital signature scheme, the signature can not be verified without the signer's cooperation. The undeniable signature scheme can be used to computerize many applications which can not be done by a conventional digital signature scheme. In this study, we propose the undeniable digital multi-signature scheme which requires many signers and designated verifier The multi-signature can be verified only in cooperation with all signers. The proposed scheme satisfies undeniable property and it is secure against active attacks such as modification and denial of the multi-signature by signers. We also propose copyright protection method of co-authored digital contents as an application of the proposed scheme.