How to Hide Secrets with Both Low and High Tech Tactics

Civilizations have always tried to hide secrets from their enemies, allies and even trading partners so they could advance their political will, wealth or power over another, a peoples or an entire world. This should not be all that surprising to people at all. There are numerous examples of this and even to this day we see it in industry, first world nations and with world power brokers, spies, arms dealers, dictators and capitalists. And the hiding of secrets is so pervasive that nations have spies to uncover the truth often hidden in misdirection, deep underground bases and some out in the open to blatant that no one believes it.

Today nations like ours spend huge amounts of time and dollars hiding information using all sorts of tricky little tactics, most are well known. What are some of the ways to hide information, communication and knowledge from others to maintain control. After all knowledge is power and if you control the knowledge well you have all the power. Hiding information in symbols is an interesting idea and it is the same whether it is a book, ancient text or some other fashion if you are hiding it from those who cannot read the language or understand all the symbols you see?

Remember the Twilight Zone "To serve man?" Right now with encryption we hide things in symbols representing numbers; these symbols representing the human world