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More about encrypting your message...
You can encrypt your message, if you want to transmit a confidential message. Simply click Encrypt just before sending your message. The message will be encrypted directly on your machine (and it may take some seconds). This is done via Public Key encryption, which allows you to encrypt a message without a password, while only the key owner can decrypt it. If you want to be 100% sure that the key is authentic, you should call the owner and compare the fingerprint.
