CERN Accelerating science

Test your certificate


  • If your browser says it cannot display the page, then it is not accepting the certificate presented by the Registrar Web server. You must accept the server certificate before a secure connection can be established.
  • If your certificate is valid for WLCG Registration use then you will see a page telling you this and you can proceed with the registration.
  • If your certificate cannot be used, check if any of the reasons below apply to you.
    • You have not loaded the certificate into your browser.
    • The certificate is not issued by one of the list of accepted Certification Authorities.
    • The certificate validity date has passed.
    • The certificate has been revoked by the Certification Authority


Page last updated on: 29 May 2013