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I have the idea to use blender to build a free, easy to use encryption device for videos embedded inside other videos. Since i am stuck at the beginning, not having a real clue apart from the guttural feeling that it should work, i though i ask you.
My loose thoughts so far:

-the hidden data should be intact after up- and downloading to and from youtube.

-the key should be some sort of inconspicuous picture. A simple png or jpg say of the chinese wall.

- I have a vague vision that animation nodes could help. And: Could one make use of the different data container formats? 8, 16 and 32 bit? Does youtube store deeper colors than 8 bit? Use the alpha channel?

-How big can the bandwidth of the news get in order for the carrier wave to be unconspicuous? I'm thinking at a shrinked color space for the news. B/w? Changing the value of a pixel of the carrier could be similar to changing what? A compression algo? A letter of the alphabet?

In the end it should work like this: Plug a video into blender; plug an image as well. Get your secret message as outcome. Neither the video nor the image should look conspicuous.

What can you come up with?

You may be well ahead of me, but just to check: have you looked at anything on steganography? Granted, that's generally used to hide text, but there's no reason you couldn't use the same algorithms to hide a smaller media file within a larger one. I'm not sure you'd really need Blender, though, since normally steganography is done by directly manipulating the data file.

MTKnife wrote:You may be well ahead of me, but just to check: have you looked at anything on steganography? Granted, that's generally used to hide text, but there's no reason you couldn't use the same algorithms to hide a smaller media file within a larger one. I'm not sure you'd really need Blender, though, since normally steganography is done by directly manipulating the data file.

Great! Ste-ga-no-graphy - never heard of that. Exactly the wheel i was planning to invent But this time for GUI affine noobs like me. You don't accidentally have experience with the encoding, so you could rebuild the signal process in blender as a nodetree? Anyway, to know on what wikipedia page to find the basic equations is already helpful. Many thanks!

I don't know much about the technical details, but you're welcome.