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Which key is kept private and known only to the owner in public-key encryption?

25. Which key is kept private and known only to the owner in public-key encryption?

1. Public key
2. Secret key
3. Private key
4. Shared key

Answer: C) Private key

Explanation:

In public-key encryption (also known as asymmetric encryption), a pair of mathematically related keys are used: a public key and a private key.