To protect and encode your e-mail transmissions, Evolution offers two encryption methods:GPG EncryptionS/MIME EncryptionEvolution helps you protect your privacy by using GNU Privacy Guard (GPG), an implementation of strong Public Key Encryption.GPG uses two keys: public and private. You can give your public key to anyone you want to receive encrypted messages, or put it on a public key server so that people can look it up before contacting you. Your private key lets you decrypt any message encrypted with your public key. Never give your private key to anyone. Using encryption takes a bit of forethought. When you send a message that is encrypted, you must encrypt it using your intended recipient's public key. To receive an encrypted message, you must make sure that the sender has your public key in advance. For signing messages, you encrypt the signature with your private key, so only your public key can unlock it. When you send the message, the recipient gets your public key and unlocks the signature, verifying your identity.Evolution does not support older versions of PGP, such as OpenPGP and Inline PGP.You can use encryption in two different ways:You can encrypt the entire message, so that nobody but the recipient can read it.You can attach an encrypted signature to a plain text message, so that the recipient can read the message without decrypting it, and needs decrypting only to verify the sender's identity.For example, suppose that Kevin wants to send an encrypted message to his friend Rachel. He looks up her public key on a general key server, and then tells Evolution to encrypt the message. The message now reads @#$23ui7yr87#@!48970fsd. When the information gets to Rachel, she decrypts it using her private key, and it appears as plain text for her to read.
