What are the two different phases in the process of Cisco Secure Email Gateway performing S/MIME encryption? (Choose two.)

Question

Options

• AAttach the encrypted public key to the message
• BEncrypt the message body using the session key
• CSend the encrypted message to the sender
• DAttach the encrypted symmetric key to the message
• ECreate a pseudo-random session key.

• A
  5% (1)
• B
  86% (19)
• C
  9% (2)

Explanation

S/MIME (Secure/Multipurpose Internet Mail Extensions) uses hybrid encryption. The process has two key phases: (E) Create a pseudo-random session key-a one-time symmetric key is generated for each message; and (B) Encrypt the message body using the session key-the actual email content is encrypted with this symmetric session key (symmetric encryption is fast and efficient for bulk data). The session key itself is then encrypted with the recipient's public key and attached to the message. Option D ('Attach the encrypted symmetric key') is part of the process but occurs after E and B. Option A is incorrect because public keys are not encrypted and attached-they are retrieved from a certificate. Option C is wrong because the encrypted message is sent to the recipient, not the sender.

No community discussion yet for this question.