A secure microgrid controller needs to verify energy usage without revealing precise consumption values to the central grid. Which mechanism maintains data privacy?

💡 Explanation

Zero-knowledge proof verifies the energy usage falls within acceptable limits without revealing the exact amount, because the prover demonstrates knowledge without divulging the information itself through a series of interactive challenges. Therefore, privacy is maintained, rather than using encryption, differential privacy, or bloom filters which involve transforming or summarizing the data.

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