A hidden message is information that is not immediately noticeable, and that must be discovered or uncovered and interpreted before it can be known.
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Invisible ink, also known as security ink or sympathetic ink, is a substance used for writing, which is invisible either on application or soon thereafter, ...
Secret messages can be introduced into the least significant bits in an image and then hidden. A steganography tool can be used to camouflage the secret ...
The Codebreakers – The Story of Secret Writing ( ISBN 0-684-83130-9) is a book by David Kahn, published in 1967, comprehensively chronicling the history of ...
Cryptography, or cryptology is the practice and study of techniques for secure communication in the presence of adversarial behavior.
In cryptology, a code is a method used to encrypt a message that operates at the level of meaning; that is, words or phrases are converted into something ...
The Voynich manuscript is an illustrated codex, hand-written in an unknown script referred to as 'Voynichese.' The vellum on which it is written has been ...
Ciphers are commonly used to encrypt written information. Codes operated by substituting according to a large codebook which linked a random string of ...
Apr 14, 2021 · People actually are trying to write all kinds of biased things on Wikipedia, it's just that other people are fighting hard to not let those ...
Aug 9, 2011 · Mindy Tyson McHorse challenges freelancers to set more meaningful goals by thinking outside of the box.