Steganography
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Steganography is a technique for hiding secret information within other files like images, audio or video. It works by concealing a file within another file so that the existence of the hidden message is undetectable. Some advantages are that it preserves secret information from others and can be applied to digital media without detection. A disadvantage is that encoding very large files may create suspicion.
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The document summarizes a seminar presentation on steganography. It discusses the history of steganography from ancient Greece to modern digital techniques. It describes how steganography differs from cryptography in hiding information rather than encrypting it. The document outlines common steganography techniques like least significant bit insertion and the injection method. It provides examples of steganography applications for both legitimate uses like digital watermarking as well as illegitimate uses like corporate espionage. The presentation concludes that steganography can effectively hide sensitive information while cryptography provides additional security through encryption.83747965 steganography
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Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video. It works by hiding secret information in places where an observer would not easily notice. Historically, steganography techniques have included tattooing messages on shaved heads and using invisible ink between the lines of otherwise normal text. Modern methods embed data in the least significant bits of images, audio files, or video frames. Steganography provides a way to secretly communicate while avoiding detection from those not intended to receive the message.Steganography ppt
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Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video. The concealed message is hidden in a way that prevents detection. It differs from cryptography, which encrypts a message to hide its meaning but not its existence. Modern steganography techniques include least significant bit insertion to hide messages in image files with minimal distortion. Detection of concealed messages is called steganalysis and involves visual or statistical analysis to reveal alterations caused by message embedding.PPT steganography
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This document provides an overview of steganography, including:
1) Steganography is the art of hiding information in plain sight so that the very existence of a hidden message is concealed. It works by embedding messages within images, audio, or other files.
2) Modern uses include digital watermarking to identify ownership, hiding sensitive files, and illegitimate uses like corporate espionage, terrorism, and child pornography.
3) Techniques include least significant bit insertion to replace bits in files, injection to directly embed messages, and generating new files from scratch. Detection methods like steganalysis aim to discover hidden information.Steganography
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Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video. The word steganography combines the Greek words steganos meaning "covered, concealed, or protected", and graphein meaning "writing".
The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography, disguised as a book on magic. Generally, the hidden messages appear to be (or be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter. Some implementations of steganography that lack a shared secret are forms of security through obscurity, whereas key-dependent steganographic schemes adhere to Kerckhoffs's principle.
The advantage of steganography over cryptography alone is that the intended secret message does not attract attention to itself as an object of scrutiny. Plainly visible encrypted messages¡ªno matter how unbreakable¡ªarouse interest, and may in themselves be incriminating in countries where encryption is illegal.Thus, whereas cryptography is the practice of protecting the contents of a message alone, steganography is concerned with concealing the fact that a secret message is being sent, as well as concealing the contents of the message.
Steganography includes the concealment of information within computer files. In digital steganography, electronic communications may include steganographic coding inside of a transport layer, such as a document file, image file, program or protocol. Media files are ideal for steganographic transmission because of their large size. For example, a sender might start with an innocuous image file and adjust the color of every 100th pixel to correspond to a letter in the alphabet, a change so subtle that someone not specifically looking for it is unlikely to notice it.Steganography
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Steganography
- 1. Image Steganography using LSB insertion
- 2. Introduction Steganography is the practice of concealing a file, message, image, or video within another file, message, image, or video. The word steganography combines the Greek words steganos meaning "covered, concealed, or protected", and graphein meaning ¡°writing".
- 3. Advantages of Steganography ? Preserving secret information that is hidden from others ? Can be applied on digital image,audio and Video ? Unsuspicious, as no one can detect.
- 4. Disadvantage of Steganography ? Huge file can be encoded into file as this might create suspicion.
- 6. Thank you