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Paper Abstract and Keywords
Presentation 2011-12-09 11:30
An Application of Steganalysis based on sparse code shrinkage to watermarking attack
Michiharu Niimi, Hideki Noda (Kyutech) EA2011-98 EMM2011-58
Abstract (in Japanese) (See Japanese page) 
(in English) Steganography means hiding important message in innocent data.
On the other hand, steganalysis means to extract, erase the hidden
message or detect the clues of the embedding from stego object.
As an universal steganalysis, which means a kind of steganalysis that
is not specified for an
embedding technique,
we have proposed a technique using the amount of the Gaussian white noise estimated by Sparse Code
Shrinkage on sparse code as an image feature.
This method assumes that the corruption of image data by information hiding distributes
can be modeled as Gaussian noise.
Because Sparse Code Shrinkage can be regarded as a filter that separates
Gaussian noise from non Gaussian distribution,
the estimated noise by Sparse Code Shrinkage would be informative feature for image
steganalysis.
From several experiments, we have confirmed our method shows better
performance compared to conventional universal steganalyers.
This paper presents an application of our steganalysis to watermarking
attack that removes the embedded watermarking information.
The purpose of the proposed system is to remove embedded watermark in a
given image.
The attack scheme consists of three steps:
a) founding basic images from the given image to transform pixel data to
sparse code,
b) Gaussian noise removal on sparse code coefficients by Sparse Code
Shrinkage, and
c) emphasizing the denoised image by amplifying the sparse sole
coefficients.
Experimental results show the efficiency of the
proposed attack against Adobe Photoshop CS4 watermarking.
Keyword (in Japanese) (See Japanese page) 
(in English) sparse coding / sparse code shrinkage / steganalysis / watermarking attack / / / /  
Reference Info. IEICE Tech. Rep., vol. 111, no. 334, EMM2011-58, pp. 13-18, Dec. 2011.
Paper # EMM2011-58 
Date of Issue 2011-12-02 (EA, EMM) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
Download PDF EA2011-98 EMM2011-58

Conference Information
Committee EA EMM  
Conference Date 2011-12-09 - 2011-12-09 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) Multimedia Fusion, Content Processing, Multimedia Retrieval, Digital Watermarking, and Related Topics 
Paper Information
Registration To EMM 
Conference Code 2011-12-EA-EMM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) An Application of Steganalysis based on sparse code shrinkage to watermarking attack 
Sub Title (in English)  
Keyword(1) sparse coding  
Keyword(2) sparse code shrinkage  
Keyword(3) steganalysis  
Keyword(4) watermarking attack  
Keyword(5)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
1st Author's Name Michiharu Niimi  
1st Author's Affiliation Kyushu Institute of Technology (Kyutech)
2nd Author's Name Hideki Noda  
2nd Author's Affiliation Kyushu Institute of Technology (Kyutech)
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Speaker Author-1 
Date Time 2011-12-09 11:30:00 
Presentation Time 30 minutes 
Registration for EMM 
Paper # EA2011-98, EMM2011-58 
Volume (vol) vol.111 
Number (no) no.333(EA), no.334(EMM) 
Page pp.13-18 
#Pages 6 
Date of Issue 2011-12-02 (EA, EMM) 

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