Alibaba Cloud Certificates Service is subject to the following limits:
- Only two types of server certificates (Professional and Advanced) are available. Different Certificate Authorities (CAs) provide different products (or do not have the specified type of certificates available) for you to choose from.
- As required by the CA, you must provide genuine and legitimate materials of your organization. Alibaba Cloud submits the materials provided by you to the CA for review. The CA can contact you for verification purpose.
- When generating a CSR file, the minimum bit length of the encryption key is RSA 2048 and SHA 256 for hash algorithm.
- Certificates provided by Alibaba Cloud Certificates Service are in the PEM format.