Steganography basic

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Steganography basic

  1. 1. Presented By:- Sanoj(mu10co13) Steganography
  2. 2. What is steganography?  Technique of hidden or covered writing  It is different from cryptography  We conceal our message inside a cover message  Steganography’s goal is to keep the presence of a message secret
  3. 3. Steganography System Figure 1: Steganographic System
  4. 4. Types of steganography  Text Steganography  Image Steganography  Audio Steganography  Video Steganography
  5. 5. Text Steganography Our secret message may be the 1st or nth character of the stego message. Example-Susan eats truffles. Under pressure, that helps everything before 0wning Major Bullwinkle. real or secret message “Set Up the b0MB” Tool:snow- used to conceal messages in ASCII text by appending white-space to the end of lines.
  6. 6. Image Steganography In image steganography we hide our information bits in image. Methods -Least significant bit insertion :- In this method the LSB of a byte is replaced with an M’s bit. To the human eye ,the resulting image will look identical to the cover object.
  7. 7. Audio Steganography  Messages can be hidden in common audio formatted files or the audio itself. It is more difficult process than image steganography.  Methods 1. Transmitting a message in the human- inaudible audio spectrum. 2. Digitally embedding a message into an audio file. -Tool: S-Tool 4
  8. 8. Video Steganography  Video files are generally a collection of images and sounds.The great advantages of video are the large amount of data that can be hidden inside and the fact that it is a moving stream of images and sounds. Therefore, any small but otherwise noticeable distortions might go by unobserved by humans because of the continuous flow of information.
  9. 9. Thank You

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