Yes. We use HTTPS throughout the entire site, this means that all communications between your computer and our servers are encrypted and secure.
University of Wisconsin-Madison states that, "A secure URL should begin with “https” rather than “http.” The “s” in “https” stands for secure, which indicates that the site is using a Secure Sockets Layer (SSL) Certificate. This lets you know that all your communication and data is encrypted as it passes from your browser to the website’s server."
You can read more about what makes a website secure, here.