Method of authorization for control access to wind power installations, and also interface for wind power installations and certification center

An interface for at least one wind turbine or at least one wind farm, comprising:

• a data connection configured to receive a certificate, wherein the interface is configured to:
• read a control-access type of the certificate that is stored in the certificate, and
• allow, on the basis of the certificate, at least one control access of a control-access type, the at least one control access having as the control-access type, the stored control-access type.

A certification center for authorizing users for control accesses to at least one wind turbine or to at least one wind farm, comprising:

• an interface for authenticating a user with the certification center and for transferring at least one control-access type to the certification center,
• wherein the certification center is configured to generate a certificate containing the control-access type according to at least one of the control-access type and stored access permissions of the authenticated user, and
• wherein the interface is configured to issue the electronic certificate.