Caesar Cipher Disc - 10 Pack

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Cryptography was important more than 4,000 years ago to protect the interests of kings, military leaders, and other dignitaries. The need to conceal information from unauthorized access is also important today because of the vast amounts of personal, financial, and medical data stored online in computer systems worldwide. In this activity, students assemble and practice encrypting and decrypting messages using a simple substitution cipher and a secret key.