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In 1996, I registered my first website, Vaughan-Nichols & Associates. After setting up the site, one of the first things I did was to secure connections with a Secure Sockets Layer (SSL) certificate.

Q. Recently, I’ve become concerned about the privacy of sending email. What’s a cheap and easy way to protect my email messages? A. I’ve consistently preached that the use of unencrypted email is the ...