The only way to secure that information would be to use SSL. Unfortunately most of our website (except the customer zone) runs on normal http (for performance reasons). This means that we're unable to post to a secure server and read the response due to cross domain scripting limitations.
If you can show me a reliable cross-browser technique to get around this issue, then we'll implement it.
Web Africa, Axxess and Cybersmart are "insecure" by that standard. The only reasons why the other guys are secure is because they don have a global login.