https://locodigital.com.br/en/tags/digital-certificate/Recent content in Digital Certificate on LocodigitalHugoen-USSat, 07 Nov 2026 08:00:00 -0300https://locodigital.com.br/en/technology/diginotar-2011-hacked-certificate-authority-security-history/Sat, 07 Nov 2026 08:00:00 -0300https://locodigital.com.br/en/technology/diginotar-2011-hacked-certificate-authority-security-history/<p>In August 2011, a Gmail user in Iran opened Chrome and saw a warning: Google's certificate was not trusted. They posted the alert on a company support forum. That screenshot was the first public sign of one of the most serious attacks on the web's trust infrastructure: the breach of <strong>DigiNotar</strong>, a Dutch certificate authority that went bankrupt a few weeks later.</p> <h2>What is a certificate authority (CA)?</h2> <h3>What does the HTTPS padlock actually mean?</h3> <p><strong>The HTTPS padlock means the connection is encrypted and the site's certificate was signed by a certificate authority your browser trusts.</strong> If you visit <code>google.com</code> and the certificate presented was signed by a CA on the browser's list, it accepts it without asking.</p>