CompTIA Security+ (SY0-501) — Question 603

Which of the following is unique to a stream cipher?

Answer options

• A. It encrypt 128 bytes at a time.
• B. It uses AES encryption.
• C. It performs bit-level encryption.
• D. It is used in HTTPS.

Correct answer: C

Explanation

The correct answer is C because stream ciphers operate by encrypting data one bit at a time, allowing for more flexible data processing. Options A and B refer to block cipher characteristics, while D relates to a protocol that can use various encryption methods, not specifically stream ciphers.