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CYB 205 Infrastructure Administration
Q: Fred's company wants to ensure the integrity of email messages sent via its central email servers. If the confidentiality of the messages is not critical, what solution should Fred suggest?
A: Digitally sign but don't encrypt all messages.
Explanation: Fred's company needs to protect the integrity, which can be accomplished by digitally signing messages. Any change will cause the signature to be invalid. A digital signature provides both proof of origin (and therefore nonrepudiation) and message integrity.Answer B is incorrect. Encrypting isn't necessary because the company does not want to protect confidentiality.Answer D is incorrect. The Transport Layer Security (TLS) protocol can provide in-transit protection but won't protect the integrity of the messages.Answer A is incorrect. The Network Time Protocol (NTP) allows the synchronization of system clocks with a standardized time source. It is used to synchronize the devices on the Internet.
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