Your meter readings are sent to the communications hub in your home over a secure wireless home area network (HAN). The communications hub then sends out the readings to your supplier over a mobile wide area network (WAN). Both networks have been built so that the data that’s been sent over them is always secure.
We know there’s been some stories in the news about smart meters being dangerous for your health. However, all smart meters have to meet stringent health and safety standards, and all the evidence shows that smart meters are not a risk to your health.