Hidden messages? How nifty, in times of uncertainty, surveillance, we may all need ways of transmitting messages.
Steganography is a means of hiding a message inside a normal appearing message, image or video:
The first recorded use of the term was in 1499 by Johannes Trithemius in his Steganographia, a treatise on cryptography and steganography, disguised as a book on magic. Generally, the hidden messages appear to be (or be part of) something else: images, articles, shopping lists, or some other cover text. For example, the hidden message may be in invisible ink between the visible lines of a private letter
So while this photo looks like an everyday walrus (like you see one every day?), hidden inside of it is a completely different image:
The image was created with a web site that allows you to hide one image inside another, and you can use it to reveal a hidden image (an encoder/decoder site) if you download the walrus image.
Once you see how it works, your mission today is to think about what kind of meaning you can use to hide one image inside another, like revealing an inner truth. For example, use the Steganography tool to find out what’s really inside this man.
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This Daily DDA has been recycled from previously published ones:
• #dda91 Hidden Images: Seeing inside with Steganography (Apr 2, 2017)
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