Are you talking about their TLS certificate? SSL Labs[0] gives them an A-, and gives their certificate 100%.<p>[0]:<a href="https:&#x2F;&#x2F;www.ssllabs.com&#x2F;ssltest&#x2F;analyze.html?d=reproducible-builds.org" rel="nofollow">https:&#x2F;&#x2F;www.ssllabs.com&#x2F;ssltest&#x2F;analyze.html?d=reproducible-...</a>