Create a plaintext message and encrypt it using a Vigen`ere cipher, either the standard sort or Vigen`ere's original cipher. Copy the cipher text onto a separate piece of paper and note the key word you used. Trade cipher texts with a partner-but do not disclose which variety of Vigen`ere cipher you used-and decrypt the cipher text you receive. Try to figure out whether your partner used original or standard Vigen`ere. How might you decide?