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Example from executing Lab1:

Picture before hiding message in it (picture number 1)

wikipedia_cat

Picture after hiding message in it (picture number 2)

wikipedia_cat_stegano

Executing decrypt_miazga.m script:

image

There is a message from the picture number 2.

Topics of individual Labs:

  • Lab1 - hiding the data by replacing the most significant bit of the red color
  • Lab2 - hiding the text from the command line by substituting the least significant bits. Hiding data in the form of a spiral starting in the center of the image.
  • Lab3 - hiding the text from the command line by replacing the least significant bits of the wav sound file. Pseudo-random data hiding using a hash function.
  • Lab4 - analysis of a photo with a hidden message by extracting layers of the least significant bits of the image
  • Lab5 - comparison of color histogram and LSB values for images with and without a hidden message
  • Lab6 - hiding the message using Hamming code (7,4) coding and the LSB algorithm