Encrypt the plaintext sendmoremoney with the key stream
Computer Network Security
Explores the use of a one-time pad version of the Vigenère cipher. In this
scheme, the key is a stream of random numbers between 0 and 26. For example,
if the key is 3 19 5…, then the first letter of plaintext is encrypted with
a shift of 3 letters, the second with a shift of 19 letters, the third with a
shift of 5 letters, and so on.
a. Encrypt the plaintext sendmoremoney with the key stream 9 0 1 7 23 15 21 14
11 11 2 8 9
b. Using the cipher text produced in part (a), find a key so that the cipher
text decrypts to the plaintext cashnotneeded.
