To get things in flow, you have to install Secure Mail for Gmail extension from Google Chrome Webstore. You may follow the link given above to lead to the extension page.

Now, you can open Gmail using the account from which you want to send encrypted email. Right next to the ‘Compose’ button, you can see another button, with the symbol of a Lock.

In a second, you can see a not-so-normal Compose window within the Gmail interface. It says that you are creating a Secured email message. Everything else is the same.

So, now, you can add details such as the recipient, subject and content of the email message.

Once you have finished composing the email, you can hit the Send Encrypted button.

In a second, you can see a pop-up, asking you to enter the password. You can keep this password as simple or as tough as you want. The extension also lets you leave a password hint. After providing the password, you can press the button named Encrypt and Send.

In this step, the extension will ask the sender to enter the password.

You have to enter the password and click the ‘Decrypt’ button to decrypt the encrypted mail. After you have decrypted, you may access the content like you do with a normal email message.

In a second, you can see the actual email content along with a success message.