A former chairman of the U.S. Federal Communications Commission is asking policymakers to consider ways to improve mobile security as the nation moves toward fifth-generation, or 5G, networks.

One suggestion: launching a new program to inspect and certify 5G devices for secure operations, much like the agency certifies devices using radio spectrum to ensure they don’t interfere with other signals. That was floated in a recent paper by Tom Wheeler, who served as FCC chairman during the Obama administration and is now a visiting fellow at the Brookings Institution, and David Simpson, the former chief of the FCC’s Public Safety and Homeland Security Bureau.