Message Secure Send (MSS) is a simple, easy way to protect any data that is going between your web browser and your Gmail™ account. It lets you send anything without worrying about its security. It is an extension for both Chrome™ and Gmail™.

When you have an email to send, you just have to click on the icon in the browser. After that, the recipient just needs to click the button to view the message. This is how it works:

When you send an email, you just need to type the question that will be shown in the recipient's inbox. 

The recipient will see the question and type the answer to view the message. 

If the recipient doesn't have the extension installed, they won't be able to view your email.

They can still see the question, but they won't see the answer.