Group Presentation Shaikh Shabbir Munir Muhammed Ishaque Ahmed Patel WRO 0508431 WRO 0509055 RVG HOSTEL ANDHERI-(WEST), TIME 8:00AM TO 12:00PM DATED-23 rd Sep 2013 TO 20 th OCT 2013 06/06/2022 1 RVG HOSTEL ,ANDHERI (WEST) A presentation on “Steganography” BY
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04/09/2023RVG HOSTEL ,ANDHERI (WEST) 1
Group Presentation
Shaikh Shabbir Munir
Muhammed Ishaque Ahmed Patel
WRO 0508431
WRO 0509055
RVG HOSTEL ANDHERI-(WEST),TIME 8:00AM TO 12:00PM DATED-23rd Sep 2013 TO 20thOCT 2013
A presentation on
“Steganography”
BY
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REASONS FOR SELECTING TOPIC
It was with this basic idea that we chose the topic of steganography-so that we would get the chance to learn and explore more about the lesser known world of steganography
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INTRODUCTION “Steganography”
• FROM THE GREEK WORD “STEGANO” MEANING "COVERED” AND
• GRAPHY MEANING "WRITING“
• The art of secret (hidden) writing
steganography
στεγανός
covered
γραφία
writing
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Steganography
Art and science of communicating in a way that hides the existence of a message
signal or pattern imposed on content
◦ persistent under transmission◦ not encryption
original image/file is intact◦ not fingerprinting
fingerprinting leaves separate file describing contents
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STEGANOGRAPHY UNDER VaRIOUS MEDIA
Steganography in “TEXT”
Steganography in “IMAGES”
Steganography in “AUDIO”
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STEGANOGRAPHY IN TEXT
It involves three types of coding:
Line-Shift Coding : Here, text lines are vertically shifted
to encode the document uniquely.
Word-Shift Coding : The codewords are coded into a
document by shifting the horizontal locations of words
within text lines, while maintaining a natural spacing appearance.
Feature Coding : In feature coding, certain text features
are altered, or not altered, depending on the codeword.
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STEGANOGRAPHY IN IMAGES
Image Compression: Image compression offers a solution to large image files. Two kinds of image
compression are lossless and lossy compression. Both methods save storage
space but have differing effects on any uncompressed hidden data in
theimage.
“Lossy” JPEG(Joint Photographic Experts Group) format files, offers high
compression, but may not maintain the original image's integrity. Hence it is called
“lossy”.
“Lossless” compression maintains the original image data exactly, It is thus more
favored by steganographic techniques. Eg: (BMP ),(GIF) Formats.
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STEGANOGRAPHY IN AUDIO
Transmission medium :
Bender’s transmission environments
Digital end-to-end environment.
Increased/decreased resampling environment.
Analog transmission and resampling.
''Over the air'' environment.
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Steganography Sample Website
Here is the link for Sample Stenographic tool Website: