computer security system

The Vigenère Cipher is an encryption algorithm that combines the use of a keyword with the message to be encrypted.

A tableau and explanation are provided at http://nob.cs.ucdavis.edu/classes/ecs155-2005-04/handouts/vigenere.html showing an encrypted character for each combination of characters in the message and the keyword. A Vigenère Tableau is also provided in the Learning Resources

Submit a document that includes the following:

• Using the Vigenère Tableau encryption scheme provided with a keyword of KEYWORD, encrypt the following message:

• After encrypting the message, decrypt the following message, using KEYWORD as the keyword:

For both the encryption and decryption, verify the result by creating two different tables:

• The first table is for the encryption task you completed and will have three rows and 30 columns.
  • Each column will correspond to an individual character.
  • The first row will correspond to the keyword characters.
  • The second row will correspond to the message to be encrypted.
  • The third row will correspond to the encrypted message.
• The second table is for the decryption task you completed and will have three rows and 31 columns.
  • Each column will correspond to an individual character.
  • The first row will correspond to the keyword characters.
  • The second row will correspond to the message to be decrypted.
  • The third row will correspond to the decrypted message.
• After completing the tables, write a 2-paragraph analysis distinguishing between cryptography and cryptanalysis.