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For NSA documents classified "top secret" they don't just watermark when printing, they watermark the text. How do they do this?

For NSA documents classified "top secret" they don't just watermark when printed they watermark the text. How?

They can also sprinkle typos:

For NSA documents clasified "top secret" they don't just watermark when printing, they watermark the text. How do they do this?

Another option: They'll include meaningless "extra" information after the text such as a glossary or word definitions or even just something that looks like background info copied from Wikipedia.

Of course, it all depends on how the document was obtained. The systems that modify texts in this way aren't used everywhere.




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