U.S., U.K., Australia, Canada and New Zealand Release Cybersecurity Best Practices for Smart Cities. The joint guide provides an overview of risks to smart cities, including expanded and interconnected attack surfaces; information and communications technologies (ICT) supply chain risks; and increasing automation of infrastructure operations. To protect against these risks, the government partners offer three recommendations to help communities strengthen their cyber posture: secure planning and design, proactive supply chain risk management, and operational resilience.