Abstract:
The problem of reliable protection of information from unauthorized access has existed for a long time and has not been solved so far. Methods of concealing secret messages have long been known, and this field of human activity is called stenography. The word is derived from the Greek words Steganos (secret, secret) and Graphy (writing) and means "mysterious writing". Shorthand techniques may have appeared before the text appeared (initially using symbols and designations).
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