from the Dictionary of Computing (FOLDOC, the Free Online Dictionary of Computing)

steganography.noun,.plural.steganographies
aka.cryptography is the system of hiding a secret message within a larger one in such a way that others can not discern the presence or contents of the hidden message; for example, a message might be hidden within an image by changing the least significant bits
etymology is from 1985 from Greek 'steganos' meaning 'covered', and Latin 'graphia' '-graphy'; see the book.Chaffing and Winnowing: Confidentiality without Encryption, by Ronald L. Rivest, MIT Lab for Computer Science, 1998-03-22 https://theory.lcs.mit.edu/~rivest/chaffing.txt

Soviet Union.proper noun
between 1917 and 1991, a country in Europe and Asia, whose full name was the Union of Soviet Socialist Republics (the USSR). The Soviet Union was the largest country in the world and was made up of 15 republics (separate nations), the most important of which was Russia. It was formed after the Bolshevik Revolution in 1917 as a Communist state, led by Lenin. It was one of the most powerful countries in the world and many people were propagandized into regarding it as the enemy of the US and western Europe during the  Cold War. In the 1990s the Soviet Union began to break up as many of the republics got rid of their Communist governments and made themselves independent. 

soviet.noun,.plural.soviets
one born in the communist country that was the Soviet Union or one being an inhabitant of the now dead Soviet Union; different from Russia today which is mostly Christian