CompTIA Security Plus Mock Test Q1129

Which of the following represents a cryptographic solution where the encrypted stream cannot be captured by a sniffer without the integrity of the stream being compromised?

A. Elliptic curve cryptography.
B. Perfect forward secrecy.
C. Steganography.
D. Quantum cryptography.

Correct Answer: D
Section: Cryptography

Explanation:
Quantum cryptography is a cryptosystem that is completely secure against being compromised without knowledge of the sender or the receiver of the messages.

Incorrect Answers:
A: Elliptic curve cryptography (ECC) is an approach to public-key cryptography based on the algebraic structure of elliptic curves over finite fields.
B: Forward secrecy is a property of any key exchange system, which ensures that if one key is compromised, subsequent keys will not also be compromised. Perfect forward secrecy
occurs when this process is unbreakable.
C: Steganography is the process of concealing a file, message, image, or video within another file, message, image, or video.

References:
http://searchsecurity.techtarget.com/definition/quantum-cryptography
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 248, 251, 253