A digital attack by the Iranian government is a terrifying concern for U.S. cybersecurity experts because there is no way to secure an endless array of government and private sector entities.

Adam Levin, founder of CyberScout, a global provider of identity and data defense services, said that’s because Iran is “highly sophisticated” in its cyber capabilities. He said it has the ability to shut down the entire electric grid nationwide, which would impact how 320 million Americans access food and clean water, would shutter financial and communication systems, and would disrupt the global economy.