Can a Quantum Computer Break the Security of a Standard Hash-Based Commit-Reveal Scheme? ▴ Learn

Can a Quantum Computer Break the Security of a Standard Hash-Based Commit-Reveal Scheme?

No, a quantum computer would not break the security of a standard hash-based commit-reveal scheme in the same way it breaks public-key cryptography (like RSA). While quantum algorithms (like Grover's algorithm) can speed up the search for a hash collision, they do not make it trivial.

The security can be maintained by simply doubling the hash size (e.g. moving from SHA-256 to SHA-512) to compensate for the quantum speedup, making the scheme quantum-resistant.

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