Steganography tool

Hiding one image inside another with a simple interface

Key: any key to get a random encrypt (could be a domain, so the users of a site could decrypt)

Two methods:

1. Swapping lower pixels of one image with higher pixels of another image (human undetectable, but easy to remove)
   • Using the key on every pixel to create entropy
2. Randomly swapping rows in the encrypting image (human detectable, but uneasy to remove)

How it works

Steganography: Hiding an image inside another by Kelvin Salton do Prado

How to defeat

• Human inspection
• Resolution change (cut the image to make impossible to get exact (random) pixel positions)
• Entropy measurement (if entropy of lower pixels is low then it's an image), explained by James Stanley
• Adding entropy (randomly edit lower pixels, destroying the image (using comapression))

Can beat both methods with changing resolution and compressing

Todo

• Bulk encryption