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Client certificates

Use Cloudflare public key infrastructure (PKI) to create client certificates. You can use these certificates with Cloudflare API Shield™ to enforce mutual Transport Layer security (mTLS) encryption.

To use API Shield to protect your API or web application, you must do the following:

  1. Use Cloudflare’s fully hosted public key infrastructure (PKI) to create a client certificate.

  2. Configure your mobile app or IoT device to use your Cloudflare-issued client certificate.

  3. Enable mTLS for the hosts you wish to protect with API Shield.

  4. Create Cloudflare firewall rules that require API requests to present a valid client certificate.