Inspection of URL
When using Shibboleth all requests for authentification are edited via the domain sso.rwth-aachen.de.
Then you'll see the following in your URL line of the browser.
Inspection of the certificate
By clicking on the small lock in the URL line of the browser, you get detailled information concerning the certificate in use.
Please click on the lock and then on certificate (valid).
Another window shows up.
As you can see here the server certificate is correctly issued to sso.rwth-aachen.de and issued by DFN-Verein Global Issuing CA. In addition you find the validation period.
Please click on Details.
When you scroll down you find the option Thumbprint . Please click on it.
Please click on the lock.
Then you can see that the connection is secure. Please click on the arrow to get more information. It is important that the validation is made by Verein zur Foerderung eines Deutschen Forschungsnetzes e. V.
Please click on More Information to check the fingerprint.
Then choose the tab security. Choosing Web Site Identity you can see the URL and who did the validation.
By clicking on View Certificate you can check the fingerprints and other details.