The present invention relates to the secure configuration of electronic devices, such as for example network-connected “smart” devices and appliances, collectively referred to as “IoT devices”. A computer-implemented method of secure configuration of at least one electronic device is provided. According to the method, the electronic device connects to a blockchain database; determines from said blockchain database a configuration block comprising block identification data, where the block identification data corresponds to device identification data, stored with the electronic device; obtains configuration information from said configuration block; and using the configuration information, conducts configuration of the electronic device.