A company wants to ensure that sensitive emails sent to external clients cannot be read by interceptors. They implement a solution where the sender uses the recipient's public key to encrypt the message. This ensures:

Answer options:

Non-repudiation

Confidentiality

Availability

Integrity

How to approach this question

Map the goal (cannot be read) to the CIA triad. 'Cannot be read' = Confidentiality.

Full Answer

B.Confidentiality✓ Correct

Using the recipient's public key for encryption ensures that only the holder of the corresponding private key (the recipient) can decrypt and read the message, thus preserving confidentiality.

Common mistakes

Confusing encryption (Confidentiality) with hashing/signing (Integrity/Non-repudiation).

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