Here a quick explanation of nick and dot. A search around the forum and you should find more info.
http://www.engravingglossary.com/Hand%20Engraving%20Glossary%20N.htm
If you look at other forums and sites (even the FEGA website) and click on the lock or symbol it will basically say the same thing “ site not secure”.... not a tech person but I think all you need an SSL certificate to create a secure Connection.