"No one but the recipient will ever be able to access your files." Why can I directly access and download the file shown in the demo video? Why is it transferr

"No one but the recipient will ever be able to access your files." Why can I directly access and download the file shown in the demo video? Why is it transferred in the clear via HTTP? http://www.sendrail.com/file/516885724/ResumeTemplate.docx http://www.sendrail.com/file/516885724/ResumeTemplate.docx Just wondering why there isn't some type of authentication/authorization going one. i.e. If your delivery method is to a Facebook friend, why not require authenticating them to Facebook before granting access to the file? Is the only security in place knowing a 9-digit number + filename?