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Which of the following is the BEST way to ensure email confidentiality in transit?
Correct Answer: C
End-to-end encryption ensures that email content is encrypted during transmission and can only be decrypted by the intended recipient. This approach provides robust protection against interception and unauthorized access. * Encryption of Corporate Network Traffic (Option A):This does not address email confidentiality once the email leaves the corporate network. * Complex User Passwords (Option B):Enhances account security but does not ensure email confidentiality in transit. * Digital Signatures (Option D):Ensures authenticity and integrity but does not encrypt the email content. Reference:ISACA CISA Review Manual, Job Practice Area 4: Protection of Information Assets.