# Does each subdomain need its own SSL certificate?

This depends purely on what type of certificate you have. You can have a
standard single domain certificate. Aside from that, you can also get two
following types of certificates.

## Wild card certificate

Wild card certificate can be issued for domains that look like this
`*.example.com`. This will ensure SSL encryption on all subdomains that end with
`.example.com`. For example `ws.example.com` `app.example.com` and so on.

## Multi-domain certificate

The second option is to use a multi-domain certificate that can be issued for a
predefined list of domain names. This will ensure SSL encryption an all domains
in the list using the Subject Alternative Name field of the certificate. For
example, you can get a single certificate for `ws.example.com` and
`app.example.com`.

If none of those options would work for you, you are left with the option of a
separate certificate for each domain.

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