Chrome Extension To Encrypt Your Gmail Attachments

docTrackr for Gmail uses AES encryption algorithm to encrypts attachments in your inbox. The encrypted attachments can’t be accessible without proper permissions, so even if your documents fall into the wrong hands, the data remains protected. This extension also lets you remotely destroy attachments after they’ve been sent, regardless of location. You can also track attachments sent in Gmail from your document dashboard to see where, when and by whom your attachment was opened. You can install the extension from here.