Discussion on the vigenère cipher

 

Please provide a detailed response to the below to include specific details and examples.

  • What is the Vigenère Cipher?
  • How does it work?
  • Although the Vigenère cipher was an improvement upon previous historical encryption techniques, it is still vulnerable.  How would an attacker break a Vigenère-style cipher? 

Try your hand!

1.  Encrypt the below message using the Vigenère cipher.

  • NOW IS THE TIME FOR ALL GOOD MEN TO COME TO THE AID OF THEIR COUNTRY.

2.  Decrypt the below message using the Vigenère cipher.  The passphrase is ‘crypto.’

  • Vyc Kbugecgx Qkgftk kcj btosnfntw pa dyiasorrxvwce Zatwuv bt Owivltks ke rwx 16hj tccmitp

3.  Create a Vigenère cipher of your own and see who can crack it!  Toward the end of the week, provide the solution to your cipher.

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