Question

The best-known multiple-letter encryption cipher is:

• A. Caesar cipher
• B. Hill cipher
• C. Playfair cipher
• D. Block cipher

Hint:

Multiple-letter ciphers process groups of letters, enhancing security over single-letter methods.

Answer 1

The Correct Option is B

The Hill cipher is a well-known multiple-letter encryption cipher that uses linear algebra and matrix operations to encrypt a block of letters. It operates on groups of characters, making it a block cipher in essence.