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:
- 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
- Randomly swapping rows in the encrypting image (human detectable, but uneasy to remove)
Steganography: Hiding an image inside another by Kelvin Salton do Prado
- 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
- Bulk encryption