The only person or persons who have your key can decrypt your message.
Once the message has been encrypted by you and decrypted by your recipients, the One Time Pad keys are discarded (shredded, burned, what have you) and never used again.
This manual One Time Pad system is useful if you are going to communicate by mail.
You meet with your friends periodically for a nice game of Scrabble (or Boggle) and when you are finished, generate enough keys to accommodate the number of messages you think you’ll send until you meet again for the next game of Scrabble.
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