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Questions and Answers
What is the primary function of image steganography?
What is the primary function of image steganography?
- To conceal data within an image of a different object (correct)
- To encrypt texts within the image
- To enhance the visual quality of images
- To compress image files for storage
How does audio steganography protect against unauthorized reproduction?
How does audio steganography protect against unauthorized reproduction?
- By altering sound frequencies permanently
- By embedding data within sound files (correct)
- By enhancing playback speeds
- By compressing audio files for security
Which technique is commonly used in video steganography to hide data?
Which technique is commonly used in video steganography to hide data?
- Discrete cosine transform (DCT) (correct)
- Lossless compression
- Frame rate reduction
- Color depth manipulation
What type of steganography involves using network protocols for data concealment?
What type of steganography involves using network protocols for data concealment?
Which of the following file formats is commonly associated with video steganography?
Which of the following file formats is commonly associated with video steganography?
In text steganography, how is hidden data predominantly stored?
In text steganography, how is hidden data predominantly stored?
What is watermarking primarily used for?
What is watermarking primarily used for?
Which of these methods can be used as examples of steganography?
Which of these methods can be used as examples of steganography?
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Study Notes
Types of Steganography
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Text Steganography: Involves encoding hidden information within word letters in text files, allowing for secret messaging without altering the visible content.
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Image Steganography: Conceals data within an image, using pixel intensities to hide information. The image serves as a cover object, making the embedded data undetectable.
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Audio Steganography: Hides data in audio files, preventing unauthorized reproduction. This often employs watermarking techniques, which embed messages within sound carriers, primarily for audio clips.
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Video Steganography: Incorporates data into video files by embedding hidden information within the collection of still images that constitute the video. Techniques like Discrete Cosine Transform (DCT) disguise data, remaining imperceptible to viewers. Common formats include H.264, MP4, MPEG, and AVI.
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Network or Protocol Steganography: Utilizes network protocols (e.g., TCP, UDP, ICMP, IP) as cover objects to conceal data. This approach is relevant for establishing covert channels within the OSI model of network architecture.
Examples of Steganography Techniques
- Playing an audio track backward to reveal a hidden message.
- Accelerating video playback to show concealed content.
- Inserting secret messages into the red, green, or blue channels of RGB images.
- Hiding information within a file’s header or metadata to maintain secrecy.
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