The login form of the IRCTC web site is being submitted over HTTP in plain text. This is a very serious issue since both your user ID and password could be sniffed by someone. One thing that I observed was that they have a HTTPS server running and this server is capable of receiving login requests. I think it was a bug in the code that the developer gave the URL as HTTP instead of HTTPS.
How to overcome the issue? This is not a clean approach but works fine. You can copy and paste the URL "https://www.irctc.co.in/cgi-bin/bv60.dll/irctc/services/login.do?userName=XXX&password=YYY" in your browser. Replace the XXX with your user ID and YYY with your password.
I tried to send a feedback about this to the site admin or someone in charge. Pathetic ... I could not find any link/email address in that website to do this. Hopefully someone from IRCTC will read this blog and fix the issue.