Abstract: The present invention relates to a method, a system and a central device for secure content distribution among devices in a network. The invention is based on the idea that an authorized domain is set up with a central device administering the network. When a device enters the network, the central device registers the entering device and issues at least one certificate to the entering device. The registration to ensure that the entering device is an authorized device, meaning that an authorized device manufacturer has provided the device. Due to network security, non-authorized devices are not accepted in the network. Content is distributed among the devices in the network based on authentication by means of the at least one certificate issued to each device. The distribution of content from a first device to a second device is enabled by the first device authenticating the second device, by means of the at least one certificate of the second device and vice versa.