pyrou/morpheus

Library to encrypt and decrypt data in colors of a picture. Process also known as steganography

Morpheus (莫菲斯)

, _(*1)

Morpheus is a library to encrypt and decrypt data in colors of a picture. Process also known as steganography., _(*2)

The project works regardless with imageMagick, GD library, or the well written intervention library., _(*3)

Installing via Composer

The recommended way to install Morpheus is through Composer., _(*4)

composer require pyrou/morpheus

After installing, you need to require Composer's autoloader:, _(*5)

require 'vendor/autoload.php';

How to use it

With GD library, _(*6)

# write data in image
$im = imagecreatefrompng("source.png");
Morpheus\Data::write("Helloworld", $im);
imagepng($im, "output.png");

# read data from image
$im = imagecreatefrompng("output.png");
assert("Helloworld" === Morpheus\Data::read($im));

With Image Magick, _(*7)

# write data in image
$im = new Imagick("source.png");
Morpheus\Data::write("Helloworld", $im);
$im->writeImage("output.png");

# read data from image
$im = new Imagick("output.png");
assert("Helloworld" === Morpheus\Data::read($im));

How does it work ?

Let's explain how it works with an example. Consider this beautiful octocat., _(*8)

, _(*9)

require 'vendor/autoload.php';
$im = imagecreatefrompng("source.png");
$data = base64_encode(
    "L'homme est un homme tant qu'il s'évertue ".
    "à s'élever au dessus de la nature, et cette ".
    "nature est à la fois intérieure et extérieure.");
Morpheus\Data::write($data, $im);
imagepng($im, "output.png");

Bellow is how humans and computers or perspicuous humans can see the output.png file., _(*10)

source.png	output.png	--debug*

In fact, the library has slightly changed the coloration of each pixels in upper-half of the file. So slightly that human eyes are NOT able to detect it., _(*11)

*For understand what Morpheus did, and what he sees now., _(*12)