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.

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.

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