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E-mail message authenticity and confidentiality is BEST
achieved by signing the message using the:
A. sender's private key and encrypting the message using the
receiver's public key.
B. sender's public key and encrypting the message using the
receiver's private key.
C. the receiver's private key and encrypting the message
using the sender's public key.
D. the receiver's public key and encrypting the message
using the sender's private key.
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Answer: A
By signing the message with the sender's private key, the
receiver can verify its authenticity using the sender's
public key. By encrypting the message with the receiver's
public key, only the receiver can decrypt the message using
his/her own private key. The receiver's private key is
confidential, and therefore unknown to the sender. Messages
encrypted using the sender's private key can be read by
anyone (with the sender's public key).
| Is This Answer Correct ? | 9 Yes | 1 No |
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