NDLI: Dictionary module and UDC: two new approaches to enhance embedding capacity of a steganographic channel

Content Provider	IEEE Xplore Digital Library
Author	Potdar, V.M. Han, S. Chang, E.
Copyright Year	2005
Description	Author affiliation: Sch. of Inf. Syst., Curtin Univ. of Technol., Perth, WA, Australia (Potdar, V.M.; Han, S.; Chang, E.)
Abstract	In this paper we present a new technique to enhance embedding capacity of a steganographic channel by preprocessing the secret data. We limit ourselves to textual data only. By preprocessing we don't mean compression; secret data can be compressed after it has been preprocessed by our technique. We introduce the concept of scrambled letters, user defined codes and the dictionary module to explain our technique. All these concepts when applied together give a phenomenal embedding capacity. Theoretical results show that we can achieve at least 25-30% increase in embedding capacity. We introduce two techniques, one in which we only apply the dictionary concept while the other in which we use the user defined codes along with the dictionary approach. The former technique is generic and can be applied to any form of textual data, whereas the latter can only be applied to pure text, i.e. without any form of graphics like images or graphs. Once the data is preprocessed by using our technique it can be easily embedded in any steganographic cover medium by using any steganographic algorithm.
Starting Page	697
Ending Page	700
File Size	1631594
Page Count	4
File Format	PDF
ISBN	0780390946
DOI	10.1109/INDIN.2005.1560460
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-08-10
Publisher Place	Australia
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Graphics Steganography Dictionaries Channel capacity Digital images Writing Australia History Pixel Information systems
Content Type	Text
Resource Type	Article

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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