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Welcome to the Jisc Certificate Service group. The service offers a number of different X509 SSL certificates, including Extended Validation certificates that give users the highest possible assurance, as well as S/MIME email certificates for digitally signing emails. Jisc has an agreement with the Certificate Authority, QuoVadis who is the provider of the certificates. The service has been running since 2006 and has issued many thousands of certificates to organisations in UK research and education. This is a Community group where users can obtain relevant information, receive service updates and provide feedback.

How to claim back your certificate credit if you have been affected by the OpenSSL heartbleed bug

17 April 2014 at 4:39pm

If you have been affected by the OpenSSL bug, dubbed ‘heartbleed’ and need to replace SSL certificates as a result of this vulnerability, we are happy to replace the certificate credit used to obtain the replacement certificate. Registered authorised users should first obtain the new SSL certificate in the usual way from their Janet Certificate Service account using the following link:  

We recommend that you first install a new patched version of OpenSSL software, and obtain and install the new SSL certificate. Once you have done this we advise that you revoke the now redundant certificate (again through your Certificate Service account) and contact the Janet Service Desk (, with the Certificate ID and the Common Name domain of the revoked certificate. Janet will then apply a new certificate credit to your account.