Question
Which of the following provides the GREATEST assurance of message authenticity?

A. The pre-hash code is derived mathematically from the message being sent.
B. The pre-hash code is encrypted using the sender's private key.
C. Encryption of the pre-hash code and the message using the secret key.
D. Sender attains the recipient's public key and verifies the authenticity of its digital certificate with a certificate authority.
Answers
Answer: B

Encrypting the pre-hash code using the sender's private key provides assurance of the authenticity of the message. Mathematically deriving the pre-hash code provides integrity to the message. Encrypting the pre-hash code and the message using the secret key provides confidentiality.   Your Comment




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