Eduroam is based on the most secure encryption and authentication standards in existence today. Its security by far exceeds typical hotspots.
Be aware though that when using the general Internet at an eduroam hotspot, the local site security measures at that hotspot will apply to you as well. For example, the firewall settings at the visited place may be different from those you are used to at home, and as a guest you may have access to fewer services on the Internet than you have at home. Eduroam requires the use of 802.1x which provides end-to-end encryption to ensure that your private user credentials are only available in UoM.
Eduroam will never show a webpage asking for your username and /or password. This is a sign that someone is attempting to hijack your password – do not use any network that requests this information.