S/MIME and SMIMEA

(Instructions for a Mac)

1. You need an email address that can receive Internet mail.
2. Go to one of the well-known free S/MIME providers with Safari complete list.

• https://www.comodo.com/home/email-security/free-email-certificate.php
• https://www.startssl.com/?app=1 — You want to use the identity and email validation

1. Fill out the CA's forms. (Make sure that their CA key is in your browser) and follow the procedure.
2. Once you have cert, run the Apple KeyChain access program.
3. Find your certificate and drag it to the desktop. It will drag as a file emailaddress.cer
4. This file is in DER binary format. We want to use DANE Certificate Usage 1 (specify an end entity certificate), selector 0 (full certificate in binary structure), Matching type 0 (exact match on the selected content), and a field of hexadecimal numbers. Just hex code the certificate with "xxd -p <filename>"