A provably secure anonymous buyer-seller watermarking protocol

  • Authors:
  • Alfredo Rial;Mina Deng;Tiziano Bianchi;Alessandro Piva;Bart Preneel

  • Affiliations:
  • IBBT and COSIC Group, Departement Elektrotechniek, Katholieke Universiteit Leuven, Leuven, Belgium;IBBT and COSIC Group, Departement Elektrotechniek, Katholieke Universiteit Leuven, Leuven, Belgium;Dipartimento di Elettronica e Telecomunicazioni, Università di Firenze, Firenze, Italy;Dipartimento di Elettronica e Telecomunicazioni, Università di Firenze, Firenze, Italy;IBBT and COSIC Group, Departement Elektrotechniek, Katholieke Universiteit Leuven, Leuven, Belgium

  • Venue:
  • IEEE Transactions on Information Forensics and Security
  • Year:
  • 2010

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Abstract

Buyer-seller watermarking (BSW) protocols allow copyright protection of digital content. The protocol is anonymous when the identity of buyers is not revealed if they do not release pirated copies. Existing BSW protocols are not provided with a formal analysis of their security properties. We employ the ideal-world/real-world paradigm to propose a formal security definition for copyright protection protocols, and we analyze an anonymous BSW protocol and prove that it fulfills our definition. Additionally, we implement the protocol and measure its efficiency.