Authors:
Mina Deng
;
Li Weng
and
Bart Preneel
Affiliation:
IBBT-COSIC, K. U. Leuven, ESAT/SCD, Belgium
Keyword(s):
Security, Watermarking protocol, e-Commerce, Cryptography.
Related
Ontology
Subjects/Areas/Topics:
Authentication and Watermarking
;
Computer-Supported Education
;
e-Learning
;
e-Learning, e-Commerce and e-Society Applications
;
Multimedia
;
Multimedia Systems and Applications
;
Telecommunications
Abstract:
Buyer-seller watermarking protocols integrate multimedia watermarking and fingerprinting with cryptography, for copyright protection, piracy tracing, and privacy protection. We propose an efficient buyer-seller watermarking protocol based on dynamic group signatures and additive homomorphism, to provide all the required security properties, namely traceability, anonymity, unlinkability, dispute resolution, non-framing, and non-repudiation. Another distinct feature is the improvement of the protocol’s utility, such that the double watermark insertion mechanism is avoided; the final quality of the distributed content is improved; the communication expansion ratio and computation complexity are reduced, comparing with conventional schemes.