Which term best describes the science of applying quantum mechanical properties to perform cryptographic functions and tasks?

• A. Secure Multi-Party Computation
• B. Quantum Cryptography
• C. Virtual Reality
• D. Nanotechnology

Answer: (B)

Quantum cryptography focuses on using quantum mechanical properties to enable cryptographic tasks. This field describes applying quantum physics to secure communications and cryptographic protocols, with quantum key distribution being a prime example—security rooted in the laws of quantum mechanics rather than computational assumptions. This makes it the best fit for describing the science of using quantum properties to perform cryptographic functions.

Secure Multi-Party Computation deals with private computation among parties and can be classical or quantum, but it isn’t defined specifically by using quantum properties for cryptography. Virtual Reality and Nanotechnology are unrelated to cryptographic methods.