John wants to send Marie an email that includes sensitive information, and he does not trust the network that he is connected to. Marie gives him the idea of using PGP. What should John do to communic

Question

Options

• AUse his own public key to encrypt the message.
• BUse Mane's public key to encrypt the message.
• CUse his own private key to encrypt the message.
• DUse Marie's private key to encrypt the message.

• A
  3% (1)
• B
  89% (33)
• C
  5% (2)
• D
  3% (1)

Explanation

In PGP (Pretty Good Privacy) asymmetric encryption, each user has a key pair: a public key (shared openly) and a private key (kept secret). To send an encrypted message to Marie, John must encrypt it using Marie's public key. Only Marie's corresponding private key can decrypt it - ensuring that only Marie can read the message, even if it is intercepted in transit. Using John's own public key would mean only John could decrypt it (useless for sending to Marie). Using any private key for encryption is the basis of digital signing, not confidential messaging. Never share private keys.

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