The Caesar code The Virgine`re family of codes for the alphabet is specified by ci mi

The Caesar code The Virgine`re family of codes for the alphabet is specified by ci ¼ mi þ ki mod 26 wheremi is the numerical index of the letter in the alphabet (e.g., B¼2), and ki is a component of a key of length

d. When d goes to infinity and the key is chosen randomly, this is the Vernam code, otherwise known as the one-time pad. When d¼1, this is one of the 26 possible Caesar ciphers. Typically it is broken by brute

(Brutus?) force. All possible keys are applied to the ciphertext and the message that makes sense is selected. (More precisely, a message that matches the statistical properties of the occurrences of letters and sequences of letters in a natural language is selected as being correct.) Knowing that a Caesar code was employed, decode:

NBCMCMYUMS