> For AI agents: [llms.txt](https://docs.trustedauth.com/llms.txt) provides a Markdown index of this documentation.

# Manage Certificate Authorities

You can create the following types of Certificate Authorities:

- An Issuing CA configured to issue Smart Credentials
- A Trusted CA to issue certificates on user devices

The CA validates the identity of the smart credential or device and binds the identity with a digital certificate.

## Topics in this section

[📄️Trusted CA Devices, such as a phone or a laptop, may include a device certificate to identify the device. This certificate can be used for device verification. For example, in a laptop there is a certificate that identifies both you and the laptop. That certificate is issued by a Certificate Authority. For the device to be trusted, you need to upload the CA certificate that issued the device certificate as a Trusted CA.](/docs/authentication-and-security/manage-certificate-authorities/configure-a-trusted-ca.md)

[🗃Entrust Managed PKI 1 item](/docs/authentication-and-security/manage-certificate-authorities/configure-an-entrust-managed-pki-ca.md)

[🗃Entrust PKIaaS 3 items](/docs/authentication-and-security/manage-certificate-authorities/configure-an-entrust-pkiaas-ca.md)

[🗃Microsoft CA 9 items](/docs/authentication-and-security/manage-certificate-authorities/configure-a-microsoft-ca.md)

[📄️Edit or delete CAs If you need to make changes to the CA, you can edit it as follows:](/docs/authentication-and-security/manage-certificate-authorities/edit-or-delete-an-entrust-or-a-trusted-ca.md)