Steganography is the practice of hiding secret data within ordinary files like images, audio, or video. It works by embedding messages in parts of the digital files that are ignored or discarded by compression algorithms. Common uses include governments hiding sensitive data, digital watermarking for businesses, and individuals secretly communicating. Steganography tools hide messages in files while steganalysis tools try to detect and decode any hidden data. When combined with cryptography, steganography provides better protection of secret communications than either method alone.

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Steganography
Muheeb Ghallab
Security and network engineer
muheeb0gh@gmail.com
12/2/2018
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What is Steganography?
Origin of the term: steganos: secret – graphy: writing

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Types of Digital Steganography
 Governments : hide sensitive data
 Businesses : Digital Watermarking
 Individuals : working

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Types of Digital Steganography
Hiding a Message inside Text
Hiding a Message inside Images
Hiding a Message inside Audio and Video Files

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How Steganography works ?

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9.  Detecting and decoding the hidden data within a
given medium
 Even if secret content is not revealed, modifying the
cover medium changes the medium’s statistical
properties
 Distributed Dictionary Attack
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Steganalysis

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Steganography ToolsSteganalysis Tools

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Also, phone

13. Hiding a Message inside
Audio or Videos Files
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Advantages
 Human limitations – 20.000 Hz.
 Large amount of data that can be hidden inside
 Hard to recognize because of because of the continuous
flow of information (moving stream of images and sound)

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Steganography and Cryptography are closely related
The difference is in their goals...
Cryptography: although encypted and unreadable, the existence of data is not hidden
Steganography: no knowledge of the existence of the data
*Steganography and Cryptography can be used
together to produce better protection

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 The most important use of steganographic techniques will probably lie
in the field of digital watermarking .
 Copyright.
 Might become limited under laws - governments claimed that
criminals use steganography to communicate.
 It will be used in media for protecting workers
in this field .
 Support private communication .
Future of Steganography

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Muheeb Ghallab
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Ref.
- Wikipedia
- CEH

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+41 22 807 1444
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Suite 201, Reston, VA
20190-5108 USA.
+1 703 439 2120
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