State IT agencies received alerts about threats against voting systems, but often did not share with election officials, the Senate Intelligence Committee said.

Some states are now using a software-based version of the Albert sensor, a device election officials use to detect malicious network activity.

The group, which analyzes state and local governments' network activity, said new technology was needed when it began collecting petabytes of data.

The relationship between state and federal officials has improved, but there are still plenty of challenges in securing election systems across the country, speakers at an NGA conference said.

Ben Spear, executive director of the Election Infrastructure Information Sharing and Analysis Center, shares how the organization's first seven months have prepared the nation for Election Day.