Which concept allows multiple parties to jointly compute a function over their inputs while keeping those inputs private?

• A. It encrypts all communications using quantum keys.
• B. It updates firmware on mobile devices.
• C. It creates methods for parties to jointly compute a function over their inputs while keeping those inputs private.
• D. It provides virtual reality simulations

Answer: (C)

Secure multi-party computation lets multiple parties jointly compute a function over their inputs while keeping those inputs private. No single participant reveals their raw data; only the final result is learned. Techniques like secret sharing, garbled circuits, and homomorphic encryption enable performing the calculation on encrypted or split data, so privacy is preserved throughout the process. For example, several organizations can compute a shared statistic without exposing their individual records. The other options describe protecting data in transit, updating software, or running simulations, which don’t address private collaborative computation.