Comodo RSA Certification Authority refers to one of the Comodo CA (aka Sectigo) root certificates. This is actually Comodo’s issuing root, meaning that other SSL certificates are signed by it and chained to it.
In order to be trusted, every SSL certificate must chain back to a trusted root. This is called the certificate chain and it’s crucial to your SSL certificate working correctly. This usually means downloading & installing the Comodo intermediate certificate at the same time you install SSL. You usually don’t need to install the Comodo root certificate.
This screenshot shows how the certificate on this website chains back to the Comodo Root & Intermediate certificates.
A trusted root is an extremely valuable entity, so valuable that most CAs refuse to issue directly from one. Rather, the CAs create intermediate roots for their own use, or to be leased out to other CAs. Because of this model, it’s rather common during the SSL installation process that you may be asked to install an intermediate certificate, or an intermediate bundle (a group of intermediate certificates) to help fill out the certificate chain.
Installing an intermediate certificate is simple and is typically accomplished in the same way you would install in any other SSL certificate. For instructions on how to download and install a Comodo Intermediate, follow the link below.
Download the Comodo Intermediate Certificate
Comodo is the world leader in cybersecurity and digital certificates. As the internet has evolved, so has Comodo. From its early days as a vendor of antivirus software, Comodo has emerged as one of the biggest players in the cybersecurity industry.
Comodo is in the business of creating trust online. After all, the internet will never reach its full potential if it doesn’t inspire the kind of trust that lets you interact and do business.
61% of internet users have cancelled a transaction because the website had no site seal.* That’s because few things communicate that a website is safe quite like a well-placed Comodo Secure site seal. A site seal (aka a trust seal, logo, or icon) is a visual stamp that communicates the trustworthiness of your website by showing that your company or organization has successfully been vetted by Comodo. Showing this visual security icon builds trust and improves conversion rates.