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ISACA Certified Information Systems Auditor · Isaca
Select one answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
Non-repudiation: If a person digitally signs with his private, and you used his public key to verify with a valid Certificate Authority (CA), then is truly the correct person.
Use a CA (Certification Authority)
A. Send a certificate that can be verified by a certification authority with the public key.