The growing threat of cyberattacks is prompting a group of senators to try to quickly close holes in the systems that protect the energy grid, including one decidedly low-tech approach.

The Securing Energy Infrastructure Act, introduced last month, is an attempt by Sens. Angus King of Maine, Jim Risch of Idaho and three other co-sponsors to make sure the grid’s cybersecurity system has low-tech protections instead of automated systems that can be attacked.