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Commercial Certification Authorities

Signing certificates

There are several commercial CAs available. The mechanism for signing a certificate using a commercial CA depends on which CA you choose.

Advantages of commercial CAs

An advantage of commercial CAs is that they are often trusted by a large number of people. If your applications are designed to be available to systems external to your organization, use a commercial CA to sign your certificates. If your applications are for use within an internal network, a private CA might be appropriate.

Criteria for choosing a CA

Before choosing a CA, consider the following criteria:

  • What are the certificate-signing policies of the commercial CAs?

  • Are your applications designed to be available on an internal network only?

  • What are the potential costs of setting up a private CA compared to the costs of subscribing to a commercial CA?

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