如何从公共根证书颁发机构购买 X.509 CA 证书

Question

I'm studying Azure IoT Hub and trying to connect my device to IoT Hub with x.509 certificate. It worked with self-signed cert , but the official suggestion is to purchase a root CA cert from a trusted third party to sign device cert.

Get an X.509 CA certificate

I did some research, but couldn't find where to purchase.

Can you give me a link? And how much will it cost?

Answer 1

You probably don't want a root CA cert, as those are not available to anyone but the certificate authorities themselves.

What you seem to be looking for, is a certificate signed by a root CA.

You can get one from let's encrypt , or from any of the commercial CAs like Verisign, Thawte, etc.