ADAM uses HTTPS for its connections. The browser should always have a padlock icon in front of the URL.
If the icon is not visible, has a red strike over it or has a warning icon, you should stop using the service.
Information about the icons in different browsers.
Chrome:
https://support.google.com/chrome/answer/95617?hl=en
Firefox:
https://support.mozilla.org/en-US/kb/how-do-i-tell-if-my-connection-is-secure
Safari:
https://support.apple.com/guide/safari/avoid-fraud-by-using-encrypted- websitessfri40697/mac