Every time you visit a website that starts with HTTPS, you’re using a certificate authority. But what exactly is a CA and how does it make your transactions and communications more secure?

Certificate authorities (CA) are a critical part of the internet. If CAs didn’t exist, you wouldn’t be able to shop, pay taxes, or do banking online because the internet would be insecure. (Your web browser is actually using a Certificate Authority right now.)

But what is a certificate Authority, exactly? What does a certificate authority do? And how do certificate authorities work?

Let’s hash it out.

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