Encrypting the content of emails: How to easily encrypt your web client messages with the Mailvelope browser extension
If you want to send and receive encrypted emails as well as use a secure SSL/TLS connection, you have numerous programs at your disposal with which you can access the S/MIME and PGP encryption methods previously mentioned. If you send and receive your email using a web client, the easiest way is to use a browser extension such as Mailvelope, which will be used as an example in this article.
Mailvelope is available for Mozilla Firefox and Google Chrome and enables you to use PGP email encryption in various webmail services, including Gmail, Yahoo, and Outlook on the Web. The first step is to install the extension via the plug-in or extension centre (direct links can be found on the Mailvelope website), which will add the Mailvelope icon to the browser’s menu bar: