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CompTIA Security+ All-in-One Exam Guide, Third Edition by Chuck Cothren, Roger Davis, Dwayne Williams, Gregory White, Wm. Arthur Conklin

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Mail Encryption

The e-mail concerns discussed so far in this chapter are all global issues involving security, but e-mail suffers from a more important security problem—the lack of confidentiality, or, as it is sometimes referred to, privacy. As with many Internet applications, email has always been a plaintext protocol. When many people first got onto the Internet, they heard a standard lecture about not sending anything through e-mail that you wouldn’t want posted on a public bulletin board. Part of the reason for this was that e-mail is sent with the clear text of the message exposed to anyone who is sniffing the network. Any attacker at a choke point in the network could read all e-mail passing through that network segment.

Some tools can ...

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