Question
Which of the following is the MOST reliable sender authentication method?

A. Digital signatures
B. Asymmetric cryptography
C. Digital certificates
D. Message authentication code
Answers
Answer: C

Digital certificates are issued by a trusted third party. The message sender attaches the certificate rather than the public key and can verify authenticity with the certificate repository. Asymmetric cryptography is vulnerable to a man-in-the-middle attack. Digital certificates are used for confidentiality. Message authentication code is used for message integrity verification.   Your Comment




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