(Choose 1 answer)
Using Vigenère Cipher to encrypt English text, ignoring capitalization and other symbols beyond English alphabets. The key is of length 1 and of value "Y" or 24, i.e., the key is "Y". Which of the following statements is false?
A. The cipher is equivalent to the Vigenère cipher using a key of length 3 and of value "YYY"
B. The cipher can be expressed as c = (p-2) mod 26, where c is each ciphertext letter and p is each plaintext letter
C. This cipher transforms a plaintext alphabet to distinct ciphertext alphabets with long enough plaintext inputs
D. The cipher can be expressed as c = (p+24) mod 26, where c is each ciphertext letter and p is each plaintext letter
E. The cipher is equivalent to a Caesar Cipher
ExiQ: 17
