Single Character Image Steganography

This Demonstration shows how a character can be hidden in an image with least significant bit substitution. You can see that the encrypted image is indistinguishable from the original. The "adjusted subtraction" image shows the difference between the images.


  • [Snapshot]
  • [Snapshot]
  • [Snapshot]


Steganography is the science of hiding messages so that only a person who knows the existence of the message can obtain the hidden information. The least significant bit substitution method takes the information to be hidden (in this case, the ASCII value of the character) and converts it to a binary representation. Then, every pixel of the image is also converted to a binary representation, and the least significant bit of every pixel is modified with the value of a bit corresponding to the information that the sender wants to hide. In this way, the image is not perceptibly modified because the least significant bits are the ones that least affect the image.
[1] C. Paar, J. Pelzl, and B. Preneel, Understanding Cryptography: A Textbook for Students and Practitioners, Heidelberg, Germany: Springer-Verlag, 2010.
[2] P. Wayner, Disappearing Cryptography: Being and Nothingness on the Net, San Diego: Academic Press, 1996.
[3] M. Welschenbach, Cryptography in C and C++, 2nd ed. (D. Kramer, trans.), New York: Apress, Springer-Verlag, 2001.
    • Share:

Embed Interactive Demonstration New!

Just copy and paste this snippet of JavaScript code into your website or blog to put the live Demonstration on your site. More details »

Files require Wolfram CDF Player or Mathematica.

Mathematica »
The #1 tool for creating Demonstrations
and anything technical.
Wolfram|Alpha »
Explore anything with the first
computational knowledge engine.
MathWorld »
The web's most extensive
mathematics resource.
Course Assistant Apps »
An app for every course—
right in the palm of your hand.
Wolfram Blog »
Read our views on math,
science, and technology.
Computable Document Format »
The format that makes Demonstrations
(and any information) easy to share and
interact with.
STEM Initiative »
Programs & resources for
educators, schools & students.
Computerbasedmath.org »
Join the initiative for modernizing
math education.
Step-by-Step Solutions »
Walk through homework problems one step at a time, with hints to help along the way.
Wolfram Problem Generator »
Unlimited random practice problems and answers with built-in step-by-step solutions. Practice online or make a printable study sheet.
Wolfram Language »
Knowledge-based programming for everyone.
Powered by Wolfram Mathematica © 2018 Wolfram Demonstrations Project & Contributors  |  Terms of Use  |  Privacy Policy  |  RSS Give us your feedback
Note: To run this Demonstration you need Mathematica 7+ or the free Mathematica Player 7EX
Download or upgrade to Mathematica Player 7EX
I already have Mathematica Player or Mathematica 7+