Public Key Cryptography

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Grade Vs Difficulty:
  EasyModerateChallengingPerplexing
1-2
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13-14

Participants find a key-number pair using mod 100 arithmetic to create their public and private keys. They reveal the public key and keep the private key secret. They take a one-word message and translate its letters into numbers. Then the words are encrypted using public keys and then decrypted using private keys. This is a highly interactive session.