What Is a Certificate Authority List and Where Can I Find One?

PKI industry expert Ryan Hurst estimates that there are around 85 CAs, a little more than a handful of which “account for 99% of all certificate issuance on the web.” Do you know who these CAs are or where to find a list of root certificate authorities?

Publicly trusted certificate authorities (CAs) make sending and receiving data securely over the Internet possible. A certificate authority list is a compilation of these entities’ trusted roots and typically includes commercial names like DigiCert, Sectigo, and government entities such as the U.S. Federated Public Key Infrastructure (US FPKI).

But where do you find a certificate authority list? How and what are they used for? We’ll start by exploring individual lists of trusted certificate authorities and then wrap things up by answering these and other frequently asked questions (FAQs).

Let’s hash it out.

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