Which term describes new encryption methods designed to remain secure against quantum computers?

Which term describes new encryption methods designed to remain secure against quantum computers?

• A. Random circuit sampling
• B. Superposition
• C. Post quantum cryptography
• D. Entanglement

Answer: (C)

Post-quantum cryptography refers to encryption methods designed to stay secure even when quantum computers are practical threats. The reason this term fits is that quantum devices could break many current public-key systems (like RSA and ECC) using algorithms such as Shor’s, which can efficiently factor large numbers and compute discrete logarithms. To counter this, post-quantum cryptography develops algorithms believed to resist quantum attacks, often based on different hard problems such as lattice-based, code-based, hash-based, and multivariate-quadratic cryptography. This approach is the basis for preparing standards that remain secure in a world with quantum adversaries. The other options describe quantum phenomena or experimental ideas rather than encryption methods: random circuit sampling is a way researchers demonstrate quantum computational advantage, while superposition and entanglement are fundamental properties of quantum systems, not cryptographic schemes.

Post-quantum cryptography refers to encryption methods designed to stay secure even when quantum computers are practical threats. The reason this term fits is that quantum devices could break many current public-key systems (like RSA and ECC) using algorithms such as Shor’s, which can efficiently factor large numbers and compute discrete logarithms. To counter this, post-quantum cryptography develops algorithms believed to resist quantum attacks, often based on different hard problems such as lattice-based, code-based, hash-based, and multivariate-quadratic cryptography. This approach is the basis for preparing standards that remain secure in a world with quantum adversaries.

The other options describe quantum phenomena or experimental ideas rather than encryption methods: random circuit sampling is a way researchers demonstrate quantum computational advantage, while superposition and entanglement are fundamental properties of quantum systems, not cryptographic schemes.