Question

What will be the ciphered text corresponding to “ALGORITHM” if beaufort cipher is used for encryption with key as “KEY”?

(a) BNJSWOAPV

(b) KTSWNQRXM

(c) AMIRVNZOU

(d) MBPHJSNIU

Answer 1

Correct choice is (b) KTSWNQRXM

The explanation is: For encrypting plain text choose the first letter of plain text (i.e. A) in the first horizontal row. Then find the first letter of key (i.e. K) in the column obtained in the first step. Finally, choose the leftmost letter of the row (i.e. K) obtained in the previous step. So the corresponding cipher text is “KTSWNQRXM”.