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 Steganography in 3D Geometries and Images by Adjacent Bin Mapping | Hindawi Publishing Corporation EURASIP Journal on Information Security Volume 2009 Article ID317165 10 pages doi 2009 317165 Research Article Steganography in 3D Geometries and Images by Adjacent Bin Mapping Hao-Tian Wu and Jean-Luc Dugelay EURASIP Member Multimedia Communications Department Eurecom 2229 Route des Cretes 06904 Sophia Antipolis France Correspondence should be addressed to Hao-Tian Wu Received 31 July 2008 Revised 14 December 2008 Accepted 6 February 2009 Recommended by Andreas Westfeld A steganographic method called adjacent bin mapping ABM is presented. Firstly it is applied to 3D geometries by mapping the coordinates within two adjacent bins for data embedding. When applied to digital images it becomes a kind of LSB hiding namely the LSB algorithm. In order to prevent the detection using a metric named histogram tail the hiding is performed in a pseudorandom order. Then we show that the steganalytic algorithms based on histogram characteristic function HCF can be prevented by implementing the LSB algorithm on subsets of pixels having the same neighbor values. The experimental results show that important high-order statistics of the cover image are preserved in this way while little distortion is introduced to 3D geometric models with an appropriate bin size. Copyright 2009 . Wu and . Dugelay. 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 Steganography the art of covert communication by hiding the presence of a message typically in multimedia content has attracted the interests of researchers . 1-4 . Although the early steganographic methods can imperceptibly embed data into a cover object traces of data embedding can be found within the characteristics of the stego objects. In the last decade the technique of steganalysis . 5
