Verification of authenticity of a maintenance means connected to a controller of a passenger transportation/access device of a building and provision and obtainment of a license key for use therein

摘要

The invention allows verification of authenticity of a maintenance means connectable to a controller of a passenger transportation/access device of a building. A digitally signed license key including a public asymmetric cryptography key of the maintenance means and optionally a one-way hash of a unique identifier of the maintenance means is used for this verification. Furthermore, an asymmetric cryptography key pair of the maintenance means and a symmetric cryptography key created by the controller are utilized in this verification.