Paper Info
Title
A hierarchical image authentication watermark with improved localization and security
Abstract
Several fragile watermarking schemes presented in the literature are either vulnerable to vector quantization (VQ) counterfeiting attacks or sacrifice localization accuracy to improve security. Us- ing a hierarchical structure, we propose a method that thwarts the VQ attack while sustaining the superior localization properties of blockwise independent watermarking methods. In particular, we propose dividing the image into blocks in a multi-level hierarchy and calculating block signatures in this hierarchy. While signa- tures of small blocks on the lowest level of the hierarchy ensure superior accuracy of tamper localization, higher level block signa- tures provide increasing resistance to VQ attacks. At the top level, a signature calculated using the whole image completely thwarts the counterfeiting attack. Moreover, "sliding window" searches through the hierarchy enable the verification of untampered re- gions after an image has been cropped.
Year
DOI
Venue
2001
10.1109/ICIP.2001.958538
Image Processing, 2001. Proceedings. 2001 International Conference
Keywords
Field
DocType
copy protection,image coding,message authentication,vector quantisation,VQ counterfeiting attacks,authentication watermarks,block signatures,blockwise independent watermarking,digital image manipulation,hierarchical image authentication watermark,image localization,image security,localization accuracy,multi-level hierarchy,sliding window,tamper localization,vector quantization
Digital watermarking,Sliding window protocol,Authentication,Message authentication code,Pattern recognition,Computer science,Watermark,Vector quantization,Artificial intelligence,Hierarchy,Copy protection
Conference
Volume
ISBN
Citations 
2
0-7803-6725-1
21
PageRank 
References 
Authors
3.09
2
4
Name
Order
Citations
PageRank
Mehmet Utku Celik116513.93
Gaurav Sharma264056.64
Eli Saber347858.40
A. Murat Tekalp42603278.04