bpcs 0.0.1

BPCS steganography: embedding a message in a vessel image file

The goal of steganography is to hide a message in plain sight. Here, we embed a message in an image by replacing all “complex” blocks of pixels in the image with portions of our message. It turns out that portions of the image with high complexity can be entirely removed (or in this case, replaced with our message) without changing the appearance of the image at all. Because most blocks of pixels are complex (i.e., with complexity above some threshold, “alpha”), we can usually replace around 45% of our image with a hidden message.