Buyer-seller watermarking protocol based on amplitude modulation and the El Gamal public key crypto system

Nasir Memon, Ping Wah Wong

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Digital watermarks have recently been proposed for the purposes of copy protection and copy deterrence for multimedia content. In copy deterrence, a content owner (seller) inserts a unique watermark into a copy of the content before it is sold to a buyer. If the buyer resells unauthorized copies of the watermarked content, then these copies can be traced to the unlawful reseller (original buyer) using a watermark detection algorithm. One problem with such an approach is that the original buyer whose watermark has been found on unauthorized copies can claim that the unauthorized copy was created or caused (for example, by a security breach) by the original seller. In this paper we propose an interactive buyer-seller protocol for invisible watermarking in which the seller does not get to know the exact watermarked copy that the buyer receives. Hence the seller cannot create copies of the original content containing the buyer's watermark. In cases where the seller finds an unauthorized copy, the seller can identify the buyer from a watermark in the unauthorized copy, and furthermore the seller can prove this fact to a third party using a dispute resolution protocol. This prevents the buyer from claiming that an unauthorized copy may have originated from the seller.

Original languageEnglish (US)
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSociety of Photo-Optical Instrumentation Engineers
Pages289-294
Number of pages6
Volume3657
StatePublished - Jan 1 1999
EventProceedings of the 1999 Security and Watermarking of Multimedia Contents - San Jose, CA, USA
Duration: Jan 25 1999Jan 27 1999

Other

OtherProceedings of the 1999 Security and Watermarking of Multimedia Contents
CitySan Jose, CA, USA
Period1/25/991/27/99

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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