It&#x27;s not just enterprises that use client certificates, Estonian ID cards use them too.<p><a href="https:&#x2F;&#x2F;www.ria.ee&#x2F;public-key-infrastructure&#x2F;" rel="nofollow">https:&#x2F;&#x2F;www.ria.ee&#x2F;public-key-infrastructure&#x2F;</a>