• Expand the idea of a bit-basedstream cipher as discussed in Definition 2.1.1. in the text book to an alphabet of 29letters as in the German language.Here,the additional letters are ,and . Now, develop a stream cipher that uses those 29 letters, instead of bits.
  1. What does the key streamlook like? Remember that in bit-based stream ciphers, the elements in the stream are members of Ring Z₂
  2. What do the encryption and decryption functions look like?
  3. Encrypt the message: "an alphabet with twenty nine letters is weird".Use the very same text as the key for encryption.