Automated registration of one or more IoT devices seeking connection to one or more IoT platforms using a secure provisioning service. The secured provisioning service verifies and administers connection credentials to each IoT device, ensuring legitimate devices cannot be impersonated or controlled by unauthorized personnel. The provisioning service matches the IoT devices and metadata of each IoT device to the provisioning rules. Connection credentials and/or rules defining each IoT device's access to IoT platforms are based on the provisioning rules of the rules registry. Matching each IoT device to one or more provisioning rules offers flexibility to dynamically add, delete or amend one or more rules in a complex rules-based system, allowing for automatic updates to the connection credentials of each IoT device, wherein each IoT device can be provisioned or re-provisioned using the most up to date set of new or amended rules.