Fred's company wants to ensure the integrity of email messages sent via their central email servers. If the confidentiality of the messages is not critical, what solution should Fred suggest?
A. Digitally sign and encrypt all messages to ensure integrity.
B. Digitally sign but don't encrypt all messages.
C. Use TLS to protect messages, ensuring their integrity.
D. Use a hashing algorithm to provide a hash in each message to prove that it hasn't changed.
Answer: B. Digitally sign but don't encrypt all messages.
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