Which encryption technique shifts every letter by a fixed number of positions in the alphabet?

Which encryption technique shifts every letter by a fixed number of positions in the alphabet?

• A. Caesar Cipher
• B. Big Data
• C. Cipher
• D. Encryption

Answer: (A)

Shifting every letter by a fixed number of positions in the alphabet is a substitution method where each letter maps to another letter a constant distance away. This is the Caesar cipher, the classic example of a fixed-shift technique (for instance, a shift of 3 turns A into D, B into E, and so on). It’s specific to the idea of a consistent, single-step move for every letter, which is what distinguishes it from other concepts. Big Data isn’t about encoding, cipher is a general term for encoded text, and encryption is the broader process of turning plaintext into ciphertext using various methods—none of which specifies a fixed shift like the Caesar cipher. So the technique described is the Caesar cipher.

Shifting every letter by a fixed number of positions in the alphabet is a substitution method where each letter maps to another letter a constant distance away. This is the Caesar cipher, the classic example of a fixed-shift technique (for instance, a shift of 3 turns A into D, B into E, and so on). It’s specific to the idea of a consistent, single-step move for every letter, which is what distinguishes it from other concepts. Big Data isn’t about encoding, cipher is a general term for encoded text, and encryption is the broader process of turning plaintext into ciphertext using various methods—none of which specifies a fixed shift like the Caesar cipher. So the technique described is the Caesar cipher.