When the certificate is created, the administrator has to specify the list of users, from which the application that uses the certificate will have access. The permissions of this application are restricted to the tables created by the users allowed in the certificate. In this case, the owner of the certificate has access to all the tables created from the list of users provided when the certificate was created. If these permissions need to be changed, it is necessary to create a new certificate. In this case, the granularity of permissions is granted per schema.