Can We Make a Secret Format like a PDF But If It Hasnt Been Printed?

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Can we make a secret format like a PDF but if it hasn't been printed, the writing is missing or just black so we run out of word to - secret format - then print. to prevent the spread of illegal PDF books and perhaps for top secret documents?

It would take me less than a day to turn anything that prints to display on a screen. This isn’t technically feasible. But you might be interested in this. Steganography - Wikipedia Steganography is used to hide information in images so t can get past censors or be overlooked by enemies and so on. Usually really hard to crack, and your question made me think of it.

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I would be willing to give it a try. We'll just need to figure out the best way to hide our photos. I know how to print. And there's a picture (?) in the back of your mailer I might be able to send it to. I can see that. I just never know if it's going to be taken off by my own security. So I figured I'd ask you. :-P I can't imagine it being much harder than the actual printing, right? :-P I'd probably need a new computer, and possibly a new scanner, but the printing is relatively simple. And this would be a great first step for protecting your photos from the Internet. What would be the benefit of you doing this? I'm still not sure. It might help to protect personal documents — for example, a birth certificate, marriage license, etc. But maybe it's just a way to protect pictures. I don't.