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Quantum Computing and Its Impact on Cryptography
Contributed by: Singh
  • 1. What is a qubit?
A) A classical bit used in regular computing.
B) A software language for quantum programming.
C) A basic unit of quantum information.
D) A type of encryption algorithm.
  • 2. How does quantum superposition differ from classical superposition?
A) Classical superposition involves physical waves.
B) Quantum superposition allows qubits to be in multiple states simultaneously.
C) Classical superposition is more stable.
D) Quantum superposition only applies to photon states.
  • 3. Which classical public-key encryption algorithm is vulnerable to quantum attacks?
A) AES
B) RSA
C) Diffie-Hellman
D) SHA-256
  • 4. How does quantum key distribution (QKD) ensure secure communication?
A) By leveraging the principles of quantum mechanics for key exchange.
B) By using classical encryption algorithms with quantum networks.
C) By continuously changing encryption keys at a fast pace.
D) By relying on hardware-based encryption solutions.
  • 5. What is the term for a quantum computer's ability to perform many calculations simultaneously?
A) Quantum entanglement
B) Quantum superposition
C) Quantum parallelism
D) Quantum interference
  • 6. What is post-quantum cryptography?
A) Cryptography that only quantum computers can decrypt.
B) Cryptography used after a successful quantum encryption.
C) Cryptography designed to be secure against quantum attacks.
D) Cryptography that runs on quantum networks.
  • 7. What is the theoretical advantage of quantum computers over classical ones in terms of solving certain problems?
A) Linear speedup for all algorithms.
B) Exponential speedup for some algorithms.
C) Faster at processing large datasets.
D) Better at solving purely mathematical problems.
  • 8. Which quantum algorithm is used for searching unsorted databases faster than classical algorithms?
A) Bernstein-Vazirani algorithm
B) Shor's algorithm
C) Deutsch's algorithm
D) Grover's algorithm
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