It seems that you have missed the necessary options for us to answer this question so I had to look for it. Anyway, here is the answer. The protocol that supports the encryption and decryption of e-mail messages is this: <span>Secure Multipurpose Internet Mail Extensions (S/MIME) and Pretty Good Privacy (PGP). Hope this helps.</span>
Answer:
Internet
Explanation:
The "Cloud" is an Online service this means it works on the Internet and without the Internet you can't have access to it.
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