How can you hide a photo within a photo?

Answer:
Yes - the technique is called steganography, which is the practice of hiding data within image files. However, the process is not practical for hiding multiple messages or images within images - the clue for anyone viewing the data is an unusually large image file. If privacy is a concern, encryption would be a better avenue to pursue.
First answer by Ling Chi. Last edit by Ling Chi. Contributor trust: 33 [recommend contributor recommended]. Question popularity: 1 [recommend question].