| CPC H04L 63/061 (2013.01) | 20 Claims |

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1. A method of registering a management controller of a data processing system with a new message broker, the method comprising:
after the management controller is registered with an existing message broker and already provisioned with a public private key pair:
obtaining an acknowledgement of initiation of registration of the management controller with the new message broker, the initiation being made by a server;
based on the acknowledgement, providing, by hardware resources of the data processing system, a request to register the management controller to the new message broker, the request comprising a payload signed by the management controller using a private key of the public private key pair to continue the registration of the management controller;
obtaining, by the management controller via an out of band communication channel, a challenge from the new message broker as part of the registration of the management controller;
providing, by the management controller and via the out of band communication channel, a response to the challenge to the new message broker to complete the registration of the management controller with the new message broker; and
providing computer-implemented services using the completed registration.
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