Which of the following best describes link encryption A Data

Which of the following best describes link encryption?

A. Data is encrypted at the point of origin and is decrypted at the point of destination.

B. The message is decrypted and re-encrypted as it passes through each successive node using a key common to the two nodes.

C. The KDC shares a user-unique key with each user.

D. It requires a session key that the KDC shares between the originator and the final destination.

Solution

A. IMAP is associated with email, but it is not an email security standard, it is a protocol to receive email and excels over POP3 when working with mail on multiple devices/clients \\ it also leaves a copy on the server. Although answers B, C, and D are all incorrect, they do specify valid email security standards: MIME Object Security Services (MOSS), Pretty Good Privacy (PGP), and Privacy Enhanced Email (PEM)