Really secure. All of our connections are run via HTTPS using the latest TLS 1.2 security keys to lock everything down (TLS is better than SSL). Plus, when you share a file, you can engage the privacy settings so that only a known AXEL contact will be able to access the share. Need more security? You can use our patented 2-Factor Authentication which gives an additional layer of security when you access files through AXEL or use our Secure Share feature when you share files (only available on the AXEL Pro plan).