Certified Network Defender (CND) — Question 187

Dan and Alex are business partners working together. Their Business-Partner Policy states that they should encrypt their emails before sending to each other.
How will they ensure the authenticity of their emails?

Answer options

• A. Dan will use his digital signature to sign his mails while Alex will use Dan's public key to verify the authenticity of the mails.
• B. Dan will use his digital signature to sign his mails while Alex will use his private key to verify the authenticity of the mails.
• C. Dan will use his private key to encrypt his mails while Alex will use his digital signature to verify the authenticity of the mails.
• D. Dan will use his public key to encrypt his mails while Alex will use Dan's digital signature to verify the authenticity of the mails.

Correct answer: A

Explanation

The correct answer is A because Dan uses his digital signature to sign the emails, which allows Alex to verify their authenticity using Dan's public key. Option B is incorrect because Alex cannot verify using his private key. Option C is wrong as Dan's private key is used for signing, not encrypting for verification. Option D is also incorrect because using the public key for encryption does not pertain to verifying authenticity through a digital signature.