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[_Intro_] C:/ When you were a kid, did you have a “Captain Midnight” decoder ring? With it, you could send messages to a friends that no one else could read. Or perhaps you remember using special symbols to write notes to your “squeeze” in class. If the note was intercepted , your teacher, could learn nothing about your romance.//// In more serious uses, codes and ciphers are used by our military and diplomatic forces to keep confidential information from unauthorized eyes. Businesses also send data that has been encoded to try and protect trade secrets and back-room deals. After all, you wouldn’t want your competitor to know that you were about to acquire their company with a leveraged buy-out.////////////////////////////
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