tailieunhanh - Báo cáo hóa học: " Research Article Efficient Zero-Knowledge Watermark Detection with Improved Robustness to Sensitivity Attacks"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Efficient Zero-Knowledge Watermark Detection with Improved Robustness to Sensitivity Attacks | Hindawi Publishing Corporation EURASIP Journal on Information Security Volume 2007 Article ID 45731 14 pages doi 2007 45731 Research Article Efficient Zero-Knowledge Watermark Detection with Improved Robustness to Sensitivity Attacks Juan Ramon Troncoso-Pastoriza and Fernando Perez-Gonzalez Signal Theory and Communications Department University of Vigo 36310 Vigo Spain Correspondence should be addressed to Juan Ramon Troncoso-Pastoriza troncoso@ Received 28 February 2007 Revised 20 August 2007 Accepted 18 October 2007 Recommended by Stefan Katzenbeisser Zero-knowledge watermark detectors presented to date are based on a linear correlation between the asset features and a given secret sequence. This detection function is susceptible of being attacked by sensitivity attacks for which zero-knowledge does not provide protection. In this paper an efficient zero-knowledge version of the generalized Gaussian maximum likelihood ML detector is introduced. This detector has shown an improved resilience against sensitivity attacks that is empirically corroborated in the present work. Two versions of the zero-knowledge detector are presented the first one makes use of two new zero-knowledge proofs for absolute value and square root calculation the second is an improved version applicable when the spreading sequence is binary and it has minimum communication complexity. Completeness soundness and zero-knowledge properties of the developed protocols are proved and they are compared with previous zero-knowledge watermark detection protocols in terms of receiver operating characteristic resistance to sensitivity attacks and communication complexity. Copyright 2007 J. R. Troncoso-Pastoriza and F. Perez-Gonzalez. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Watermarking technology