Please note that TACAR service has been phased out in the spring 2020.


TACAR, the Trusted Academic Certification Authority Repository, offered a repository operated by GÉANT to safely store and securely distribute verified root Certification Authority (CA) certificates. It was meant to solve a major problem in the use of Public Key Infrastructures (PKI): the ability to cost-effectively and securely retrieve and download CA root certificates needed by browsers, in situations where the root certificates are not pre-installed in the browsers, applications and operating systems.

TACAR repository is still available but please not that the information stored will not be updated nor verified.

TACAR have never operated a CA, assess CA policies nor validated the vetting procedures used by CAs to issue certificates.

Contacting TACAR

You can contact TACAR directly via email.