The Hue system uses professional encryption and authentication techniques to ensure that other people cannot access your Hue system without permission. A successful intrusion would mean that a computer within your private network has been compromised in order to send internal commands to your Hue system. In layman’s terms, this means that there is a very low security risk, if your home network is properly secured, because then the traffic between your devices and over the Internet remains completely safe. However, if there is a breach of your home network, everything within that network will be susceptible. Hue is an open platform; this means that if your network is hacked, the system can also be taken over. Should this happen, which is unlikely, just disconnect your Hue Bridge and use the balloons as regular LED lights until your network is restored.
Our advice is to just see that your network is secure; then the Hue system is too. Contact your service provider if you want to know more about securing your network.